feat: add dropzone and multiple files support

Reviewed-on: #134
Reviewed-by: eugene <eugene@nostrdev.com>

.eslintrc.cjs

@@ -6,7 +6,7 @@ module.exports = {
     'plugin:@typescript-eslint/recommended',
     'plugin:react-hooks/recommended'
   ],
-  ignorePatterns: ['dist', '.eslintrc.cjs'],
+  ignorePatterns: ['dist', '.eslintrc.cjs', 'licenseChecker.cjs'],
   parser: '@typescript-eslint/parser',
   plugins: ['react-refresh'],
   rules: {

.git-hooks/commit-msg

@@ -0,0 +1,19 @@
+#!/bin/sh
+# Get the commit message (the parameter we're given is just the path to the
+# temporary file which holds the message).
+commit_message=$(cat "$1")
+
+if (echo "$commit_message" | grep -Eq "^(build|chore|ci|docs|feat|fix|perf|refactor|revert|style|test)(\([a-z0-9 \-]+\))?!?: .+$") then
+   tput setaf 2;
+   echo -e "${GREEN} ✔ Commit message meets Conventional Commit standards"
+   tput sgr0;
+   exit 0
+fi
+
+tput setaf 1;
+echo -e "${RED}❌ Commit message does not meet the Conventional Commit standard!"
+tput sgr0;
+echo "An example of a valid message is:"
+echo "  feat(login): add the 'remember me' button"
+echo "ℹ More details at: https://www.conventionalcommits.org/en/v1.0.0/#summary"
+exit 1

.git-hooks/pre-commit

@@ -0,0 +1,13 @@
+#!/bin/sh
+
+# Avoid commits to the master branch
+BRANCH=`git rev-parse --abbrev-ref HEAD`
+REGEX="^(master|main|staging|development)$"
+
+if [[ "$BRANCH" =~ $REGEX ]]; then
+  echo "You are on branch $BRANCH. Are you sure you want to commit to this branch?"
+  echo "If so, commit with -n to bypass the pre-commit hook."
+  exit 1
+fi
+
+npm run lint-staged

.gitea/workflows/release-staging.yaml

@@ -17,9 +17,21 @@ jobs:
         with:
           node-version: 18
 
+      - name: Audit
+        run: npm audit
+
       - name: Install Dependencies
         run: npm ci
 
+      - name: License check
+        run: npm run license-checker
+
+      - name: Lint check
+        run: npm run lint
+
+      - name: Formatter check
+        run: npm run formatter:check
+
       - name: Create .env File
         run: echo "VITE_MOST_POPULAR_RELAYS=${{ vars.VITE_MOST_POPULAR_RELAYS }}" > .env
 

.gitea/workflows/staging-pull-request.yaml

@@ -0,0 +1,34 @@
+name: Open PR on Staging
+on:
+  pull_request:
+    types: [opened, edited, synchronize]
+    branches:
+      - staging
+
+jobs:
+  audit_and_check:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Setup Node
+        uses: actions/setup-node@v2
+        with:
+          node-version: 18
+
+      - name: Audit
+        run: npm audit
+
+      - name: Install Dependencies
+        run: npm ci
+
+      - name: License check
+        run: npm run license-checker
+
+      - name: Lint check
+        run: npm run lint
+
+      - name: Formatter check
+        run: npm run formatter:check

licenseChecker.cjs

@@ -0,0 +1,28 @@
+const process = require('node:process')
+const licenseChecker = require('license-checker')
+
+const check = (cwd) => {
+  return new Promise((resolve, reject) => {
+    licenseChecker.init(
+      {
+        production: true,
+        start: cwd,
+        excludePrivatePackages: true,
+        onlyAllow:
+          'AFLv2.1;Apache 2.0;Apache-2.0;Apache*;Artistic-2.0;0BSD;BSD*;BSD-2-Clause;BSD-3-Clause;BSD 3-Clause;CC0-1.0;CC-BY-3.0;CC-BY-4.0;ISC;MIT;MPL-2.0;ODC-By-1.0;Python-2.0;Unlicense;',
+        excludePackages: ''
+      },
+      (error, json) => {
+        if (error) {
+          reject(error)
+        } else {
+          resolve(json)
+        }
+      }
+    )
+  })
+}
+
+check(process.cwd(), true)
+  .then(() => console.log('All packages are licensed properly'))
+  .catch((err) => console.log('license checker err', err))

package.json

@@ -7,11 +7,16 @@
   "scripts": {
     "dev": "vite",
     "build": "tsc && vite build",
-    "lint": "eslint . --ext ts,tsx --report-unused-disable-directives --max-warnings 0",
+    "lint": "eslint . --ext ts,tsx --report-unused-disable-directives --max-warnings 29",
     "lint:fix": "eslint . --fix --ext ts,tsx --report-unused-disable-directives --max-warnings 0",
+    "lint:staged": "eslint --fix --ext ts,tsx --report-unused-disable-directives --max-warnings 0",
     "formatter:check": "prettier --check \"src/**/*.{ts,tsx,js,jsx,html,css,sass,less,yml,md,graphql}\"",
     "formatter:fix": "prettier --write \"src/**/*.{ts,tsx,js,jsx,html,css,sass,less,yml,md,graphql}\"",
-    "preview": "vite preview"
+    "formatter:staged": "prettier --write --ignore-unknown",
+    "preview": "vite preview",
+    "preinstall": "git config core.hooksPath .git-hooks",
+    "license-checker": "node licenseChecker.cjs",
+    "lint-staged": "lint-staged"
   },
   "dependencies": {
     "@emotion/react": "11.11.4",
@@ -36,10 +41,13 @@
     "lodash": "4.17.21",
     "mui-file-input": "4.0.4",
     "nostr-tools": "2.7.0",
+    "pdf-lib": "^1.17.1",
+    "pdfjs-dist": "^4.4.168",
     "react": "^18.2.0",
     "react-dnd": "16.0.1",
     "react-dnd-html5-backend": "16.0.1",
     "react-dom": "^18.2.0",
+    "react-dropzone": "^14.2.3",
     "react-redux": "9.1.0",
     "react-router-dom": "6.22.1",
     "react-toastify": "10.0.4",
@@ -50,6 +58,7 @@
     "@types/crypto-js": "^4.2.2",
     "@types/file-saver": "2.0.7",
     "@types/lodash": "4.14.202",
+    "@types/pdfjs-dist": "^2.10.378",
     "@types/react": "^18.2.56",
     "@types/react-dom": "^18.2.19",
     "@typescript-eslint/eslint-plugin": "^7.0.2",
@@ -58,10 +67,18 @@
     "eslint": "^8.56.0",
     "eslint-plugin-react-hooks": "^4.6.0",
     "eslint-plugin-react-refresh": "^0.4.5",
+    "license-checker": "^25.0.1",
+    "lint-staged": "^15.2.8",
     "prettier": "3.2.5",
     "ts-css-modules-vite-plugin": "1.0.20",
     "typescript": "^5.2.2",
     "vite": "^5.1.4",
     "vite-tsconfig-paths": "4.3.2"
+  },
+  "lint-staged": {
+    "*.{js,jsx,ts,tsx}": [
+      "npm run lint:staged"
+    ],
+    "*.{ts,tsx,js,jsx,html,css,sass,less,yml,md,graphql}": "npm run formatter:staged"
   }
 }

src/components/DrawPDFFields/index.tsx

@@ -0,0 +1,589 @@
+import {
+  AccessTime,
+  CalendarMonth,
+  ExpandMore,
+  Gesture,
+  PictureAsPdf,
+  Badge,
+  Work,
+  Close
+} from '@mui/icons-material'
+import {
+  Box,
+  Typography,
+  Accordion,
+  AccordionDetails,
+  AccordionSummary,
+  CircularProgress,
+  FormControl,
+  InputLabel,
+  MenuItem,
+  Select
+} from '@mui/material'
+import styles from './style.module.scss'
+import { useEffect, useState } from 'react'
+
+import * as PDFJS from 'pdfjs-dist'
+import { ProfileMetadata, User } from '../../types'
+import {
+  PdfFile,
+  DrawTool,
+  MouseState,
+  PdfPage,
+  DrawnField,
+  MarkType
+} from '../../types/drawing'
+import { truncate } from 'lodash'
+import { hexToNpub } from '../../utils'
+import { toPdfFiles } from '../../utils/pdf.ts'
+PDFJS.GlobalWorkerOptions.workerSrc = new URL(
+  'pdfjs-dist/build/pdf.worker.min.mjs',
+  import.meta.url
+).toString()
+
+interface Props {
+  selectedFiles: File[]
+  users: User[]
+  metadata: { [key: string]: ProfileMetadata }
+  onDrawFieldsChange: (pdfFiles: PdfFile[]) => void
+}
+
+export const DrawPDFFields = (props: Props) => {
+  const { selectedFiles } = props
+
+  const [pdfFiles, setPdfFiles] = useState<PdfFile[]>([])
+  const [parsingPdf, setParsingPdf] = useState<boolean>(false)
+  const [showDrawToolBox, setShowDrawToolBox] = useState<boolean>(false)
+
+  const [selectedTool, setSelectedTool] = useState<DrawTool | null>()
+  const [toolbox] = useState<DrawTool[]>([
+    {
+      identifier: MarkType.SIGNATURE,
+      icon: <Gesture />,
+      label: 'Signature',
+      active: false
+    },
+    {
+      identifier: MarkType.FULLNAME,
+      icon: <Badge />,
+      label: 'Full Name',
+      active: true
+    },
+    {
+      identifier: MarkType.JOBTITLE,
+      icon: <Work />,
+      label: 'Job Title',
+      active: false
+    },
+    {
+      identifier: MarkType.DATE,
+      icon: <CalendarMonth />,
+      label: 'Date',
+      active: false
+    },
+    {
+      identifier: MarkType.DATETIME,
+      icon: <AccessTime />,
+      label: 'Datetime',
+      active: false
+    }
+  ])
+
+  const [mouseState, setMouseState] = useState<MouseState>({
+    clicked: false
+  })
+
+  useEffect(() => {
+    if (selectedFiles) {
+      setParsingPdf(true)
+
+      parsePdfPages().finally(() => {
+        setParsingPdf(false)
+      })
+    }
+  }, [selectedFiles])
+
+  useEffect(() => {
+    if (pdfFiles) props.onDrawFieldsChange(pdfFiles)
+  }, [pdfFiles])
+
+  /**
+   * Drawing events
+   */
+  useEffect(() => {
+    // window.addEventListener('mousedown', onMouseDown);
+    window.addEventListener('mouseup', onMouseUp)
+
+    return () => {
+      // window.removeEventListener('mousedown', onMouseDown);
+      window.removeEventListener('mouseup', onMouseUp)
+    }
+  }, [])
+
+  const refreshPdfFiles = () => {
+    setPdfFiles([...pdfFiles])
+  }
+
+  /**
+   * Fired only when left click and mouse over pdf page
+   * Creates new drawnElement and pushes in the array
+   * It is re rendered and visible right away
+   *
+   * @param event Mouse event
+   * @param page PdfPage where press happened
+   */
+  const onMouseDown = (event: any, page: PdfPage) => {
+    // Proceed only if left click
+    if (event.button !== 0) return
+
+    // Only allow drawing if mouse is not over other drawn element
+    const isOverPdfImageWrapper = event.target.tagName === 'IMG'
+
+    if (!selectedTool || !isOverPdfImageWrapper) {
+      return
+    }
+
+    const { mouseX, mouseY } = getMouseCoordinates(event)
+
+    const newField: DrawnField = {
+      left: mouseX,
+      top: mouseY,
+      width: 0,
+      height: 0,
+      counterpart: '',
+      type: selectedTool.identifier
+    }
+
+    page.drawnFields.push(newField)
+
+    setMouseState((prev) => {
+      return {
+        ...prev,
+        clicked: true
+      }
+    })
+  }
+
+  /**
+   * Drawing is finished, resets all the variables used to draw
+   * @param event Mouse event
+   */
+  const onMouseUp = () => {
+    setMouseState((prev) => {
+      return {
+        ...prev,
+        clicked: false,
+        dragging: false,
+        resizing: false
+      }
+    })
+  }
+
+  /**
+   * After {@link onMouseDown} create an drawing element, this function gets called on every pixel moved
+   * which alters the newly created drawing element, resizing it while mouse move
+   * @param event Mouse event
+   * @param page PdfPage where moving is happening
+   */
+  const onMouseMove = (event: any, page: PdfPage) => {
+    if (mouseState.clicked && selectedTool) {
+      const lastElementIndex = page.drawnFields.length - 1
+      const lastDrawnField = page.drawnFields[lastElementIndex]
+
+      const { mouseX, mouseY } = getMouseCoordinates(event)
+
+      const width = mouseX - lastDrawnField.left
+      const height = mouseY - lastDrawnField.top
+
+      lastDrawnField.width = width
+      lastDrawnField.height = height
+
+      const currentDrawnFields = page.drawnFields
+
+      currentDrawnFields[lastElementIndex] = lastDrawnField
+
+      refreshPdfFiles()
+    }
+  }
+
+  /**
+   * Fired when event happens on the drawn element which will be moved
+   * mouse coordinates relative to drawn element will be stored
+   * so when we start moving, offset can be calculated
+   * mouseX - offsetX
+   * mouseY - offsetY
+   *
+   * @param event Mouse event
+   * @param drawnField Which we are moving
+   */
+  const onDrawnFieldMouseDown = (event: any) => {
+    event.stopPropagation()
+
+    // Proceed only if left click
+    if (event.button !== 0) return
+
+    const drawingRectangleCoords = getMouseCoordinates(event)
+
+    setMouseState({
+      dragging: true,
+      clicked: false,
+      coordsInWrapper: {
+        mouseX: drawingRectangleCoords.mouseX,
+        mouseY: drawingRectangleCoords.mouseY
+      }
+    })
+  }
+
+  /**
+   * Moves the drawnElement by the mouse position (mouse can grab anywhere on the drawn element)
+   * @param event Mouse event
+   * @param drawnField which we are moving
+   */
+  const onDranwFieldMouseMove = (event: any, drawnField: DrawnField) => {
+    if (mouseState.dragging) {
+      const { mouseX, mouseY, rect } = getMouseCoordinates(
+        event,
+        event.target.parentNode
+      )
+      const coordsOffset = mouseState.coordsInWrapper
+
+      if (coordsOffset) {
+        let left = mouseX - coordsOffset.mouseX
+        let top = mouseY - coordsOffset.mouseY
+
+        const rightLimit = rect.width - drawnField.width - 3
+        const bottomLimit = rect.height - drawnField.height - 3
+
+        if (left < 0) left = 0
+        if (top < 0) top = 0
+        if (left > rightLimit) left = rightLimit
+        if (top > bottomLimit) top = bottomLimit
+
+        drawnField.left = left
+        drawnField.top = top
+
+        refreshPdfFiles()
+      }
+    }
+  }
+
+  /**
+   * Fired when clicked on the resize handle, sets the state for a resize action
+   * @param event Mouse event
+   * @param drawnField which we are resizing
+   */
+  const onResizeHandleMouseDown = (event: any) => {
+    // Proceed only if left click
+    if (event.button !== 0) return
+
+    event.stopPropagation()
+
+    setMouseState({
+      resizing: true
+    })
+  }
+
+  /**
+   * Resizes the drawn element by the mouse position
+   * @param event Mouse event
+   * @param drawnField which we are resizing
+   */
+  const onResizeHandleMouseMove = (event: any, drawnField: DrawnField) => {
+    if (mouseState.resizing) {
+      const { mouseX, mouseY } = getMouseCoordinates(
+        event,
+        event.target.parentNode.parentNode
+      )
+
+      const width = mouseX - drawnField.left
+      const height = mouseY - drawnField.top
+
+      drawnField.width = width
+      drawnField.height = height
+
+      refreshPdfFiles()
+    }
+  }
+
+  /**
+   * Removes the drawn element using the indexes in the params
+   * @param event Mouse event
+   * @param pdfFileIndex pdf file index
+   * @param pdfPageIndex pdf page index
+   * @param drawnFileIndex drawn file index
+   */
+  const onRemoveHandleMouseDown = (
+    event: any,
+    pdfFileIndex: number,
+    pdfPageIndex: number,
+    drawnFileIndex: number
+  ) => {
+    event.stopPropagation()
+
+    pdfFiles[pdfFileIndex].pages[pdfPageIndex].drawnFields.splice(
+      drawnFileIndex,
+      1
+    )
+  }
+
+  /**
+   * Used to stop mouse click propagating to the parent elements
+   * so select can work properly
+   * @param event Mouse event
+   */
+  const onUserSelectHandleMouseDown = (event: any) => {
+    event.stopPropagation()
+  }
+
+  /**
+   * Gets the mouse coordinates relative to a element in the `event` param
+   * @param event MouseEvent
+   * @param customTarget mouse coordinates relative to this element, if not provided
+   * event.target will be used
+   */
+  const getMouseCoordinates = (event: any, customTarget?: any) => {
+    const target = customTarget ? customTarget : event.target
+    const rect = target.getBoundingClientRect()
+    const mouseX = event.clientX - rect.left //x position within the element.
+    const mouseY = event.clientY - rect.top //y position within the element.
+
+    return {
+      mouseX,
+      mouseY,
+      rect
+    }
+  }
+
+  /**
+   * Reads the pdf binary files and converts it's pages to images
+   * creates the pdfFiles object and sets to a state
+   */
+  const parsePdfPages = async () => {
+    const pdfFiles: PdfFile[] = await toPdfFiles(selectedFiles)
+
+    setPdfFiles(pdfFiles)
+  }
+
+  /**
+   *
+   * @returns if expanded pdf accordion is present
+   */
+  const hasExpandedPdf = () => {
+    return !!pdfFiles.filter((pdfFile) => !!pdfFile.expanded).length
+  }
+
+  const handleAccordionExpandChange = (expanded: boolean, pdfFile: PdfFile) => {
+    pdfFile.expanded = expanded
+
+    refreshPdfFiles()
+    setShowDrawToolBox(hasExpandedPdf())
+  }
+
+  /**
+   * Changes the drawing tool
+   * @param drawTool to draw with
+   */
+  const handleToolSelect = (drawTool: DrawTool) => {
+    // If clicked on the same tool, unselect
+    if (drawTool.identifier === selectedTool?.identifier) {
+      setSelectedTool(null)
+      return
+    }
+
+    setSelectedTool(drawTool)
+  }
+
+  /**
+   * Renders the pdf pages and drawing elements
+   */
+  const getPdfPages = (pdfFile: PdfFile, pdfFileIndex: number) => {
+    return (
+      <Box
+        sx={{
+          width: '100%'
+        }}
+      >
+        {pdfFile.pages.map((page, pdfPageIndex: number) => {
+          return (
+            <div
+              key={pdfPageIndex}
+              style={{
+                border: '1px solid #c4c4c4',
+                marginBottom: '10px'
+              }}
+              className={`${styles.pdfImageWrapper} ${selectedTool ? styles.drawing : ''}`}
+              onMouseMove={(event) => {
+                onMouseMove(event, page)
+              }}
+              onMouseDown={(event) => {
+                onMouseDown(event, page)
+              }}
+            >
+              <img
+                draggable="false"
+                style={{ width: '100%' }}
+                src={page.image}
+              />
+
+              {page.drawnFields.map((drawnField, drawnFieldIndex: number) => {
+                return (
+                  <div
+                    key={drawnFieldIndex}
+                    onMouseDown={onDrawnFieldMouseDown}
+                    onMouseMove={(event) => {
+                      onDranwFieldMouseMove(event, drawnField)
+                    }}
+                    className={styles.drawingRectangle}
+                    style={{
+                      left: `${drawnField.left}px`,
+                      top: `${drawnField.top}px`,
+                      width: `${drawnField.width}px`,
+                      height: `${drawnField.height}px`,
+                      pointerEvents: mouseState.clicked ? 'none' : 'all'
+                    }}
+                  >
+                    <span
+                      onMouseDown={onResizeHandleMouseDown}
+                      onMouseMove={(event) => {
+                        onResizeHandleMouseMove(event, drawnField)
+                      }}
+                      className={styles.resizeHandle}
+                    ></span>
+                    <span
+                      onMouseDown={(event) => {
+                        onRemoveHandleMouseDown(
+                          event,
+                          pdfFileIndex,
+                          pdfPageIndex,
+                          drawnFieldIndex
+                        )
+                      }}
+                      className={styles.removeHandle}
+                    >
+                      <Close fontSize="small" />
+                    </span>
+                    <div
+                      onMouseDown={onUserSelectHandleMouseDown}
+                      className={styles.userSelect}
+                    >
+                      <FormControl fullWidth size="small">
+                        <InputLabel id="counterparts">Counterpart</InputLabel>
+                        <Select
+                          value={drawnField.counterpart}
+                          onChange={(event) => {
+                            drawnField.counterpart = event.target.value
+                            refreshPdfFiles()
+                          }}
+                          labelId="counterparts"
+                          label="Counterparts"
+                        >
+                          {props.users.map((user, index) => {
+                            let displayValue = truncate(
+                              hexToNpub(user.pubkey),
+                              {
+                                length: 16
+                              }
+                            )
+
+                            const metadata = props.metadata[user.pubkey]
+
+                            if (metadata) {
+                              displayValue = truncate(
+                                metadata.name ||
+                                  metadata.display_name ||
+                                  metadata.username,
+                                {
+                                  length: 16
+                                }
+                              )
+                            }
+
+                            return (
+                              <MenuItem
+                                key={index}
+                                value={hexToNpub(user.pubkey)}
+                              >
+                                {displayValue}
+                              </MenuItem>
+                            )
+                          })}
+                        </Select>
+                      </FormControl>
+                    </div>
+                  </div>
+                )
+              })}
+            </div>
+          )
+        })}
+      </Box>
+    )
+  }
+
+  if (parsingPdf) {
+    return (
+      <Box sx={{ width: '100%', textAlign: 'center' }}>
+        <CircularProgress />
+      </Box>
+    )
+  }
+
+  if (!pdfFiles.length) {
+    return ''
+  }
+
+  return (
+    <Box>
+      <Box sx={{ mt: 1 }}>
+        <Typography sx={{ mb: 1 }}>Draw fields on the PDFs:</Typography>
+
+        {pdfFiles.map((pdfFile, pdfFileIndex: number) => {
+          return (
+            <Accordion
+              key={pdfFileIndex}
+              expanded={pdfFile.expanded}
+              onChange={(_event, expanded) => {
+                handleAccordionExpandChange(expanded, pdfFile)
+              }}
+            >
+              <AccordionSummary
+                expandIcon={<ExpandMore />}
+                aria-controls={`panel${pdfFileIndex}-content`}
+                id={`panel${pdfFileIndex}header`}
+              >
+                <PictureAsPdf sx={{ mr: 1 }} />
+                {pdfFile.file.name}
+              </AccordionSummary>
+              <AccordionDetails>
+                {getPdfPages(pdfFile, pdfFileIndex)}
+              </AccordionDetails>
+            </Accordion>
+          )
+        })}
+      </Box>
+
+      {showDrawToolBox && (
+        <Box className={styles.drawToolBoxContainer}>
+          <Box className={styles.drawToolBox}>
+            {toolbox
+              .filter((drawTool) => drawTool.active)
+              .map((drawTool: DrawTool, index: number) => {
+                return (
+                  <Box
+                    key={index}
+                    onClick={() => {
+                      handleToolSelect(drawTool)
+                    }}
+                    className={`${styles.toolItem} ${selectedTool?.identifier === drawTool.identifier ? styles.selected : ''}`}
+                  >
+                    {drawTool.icon}
+                    {drawTool.label}
+                  </Box>
+                )
+              })}
+          </Box>
+        </Box>
+      )}
+    </Box>
+  )
+}

src/components/DrawPDFFields/style.module.scss

@@ -0,0 +1,113 @@
+.pdfFieldItem {
+  background: white;
+  padding: 10px;
+  border-radius: 4px;
+  cursor: pointer;
+}
+
+.drawToolBoxContainer {
+  position: fixed;
+  bottom: 0;
+  left: 0;
+  right: 0;
+  display: flex;
+  justify-content: center;
+  z-index: 50;
+
+  .drawToolBox {
+    display: flex;
+    gap: 10px;
+    min-width: 100px;
+    background-color: white;
+    padding: 15px;
+    box-shadow: 0 0 10px 1px #0000003b;
+    border-radius: 4px;
+
+    .toolItem {
+      display: flex;
+      flex-direction: column;
+      align-items: center;
+      border: 1px solid rgba(0, 0, 0, 0.137);
+      padding: 5px;
+      cursor: pointer;
+      user-select: none;
+
+      &.selected {
+        border-color: #01aaad;
+        color: #01aaad;
+      }
+
+      &:not(.selected) {
+        &:hover {
+          border-color: #01aaad79;
+        }
+      }
+
+    }
+  }
+}
+
+.pdfImageWrapper {
+  position: relative;
+  user-select: none;
+  
+  &.drawing {
+    cursor: crosshair;
+  }
+}
+
+.drawingRectangle {
+  position: absolute;
+  border: 1px solid #01aaad;
+  z-index: 50;
+  background-color: #01aaad4b;
+  cursor: pointer;
+  display: flex;
+  justify-content: center;
+  align-items: center;
+
+  &.nonEditable {
+    cursor: default;
+    visibility: hidden;
+  }
+
+  .resizeHandle {
+    position: absolute;
+    right: -5px;
+    bottom: -5px;
+    width: 10px;
+    height: 10px;
+    background-color: #fff;
+    border: 1px solid rgb(160, 160, 160);
+    border-radius: 50%;
+    cursor: pointer;
+  }
+
+  .removeHandle {
+    position: absolute;
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    top: -30px;
+    width: 20px;
+    height: 20px;
+    background-color: #fff;
+    border: 1px solid rgb(160, 160, 160);
+    border-radius: 50%;
+    color: #E74C3C;
+    font-size: 10px;
+    cursor: pointer;
+  }
+
+  .userSelect {
+    position: absolute;
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    bottom: -60px;
+    min-width: 170px;
+    min-height: 30px;
+    background: #fff;
+    padding: 5px 0;
+  }
+}

src/components/PDFView/PdfItem.tsx

@@ -0,0 +1,43 @@
+import { PdfFile } from '../../types/drawing.ts'
+import { CurrentUserMark } from '../../types/mark.ts'
+import PdfPageItem from './PdfPageItem.tsx'
+
+interface PdfItemProps {
+  pdfFile: PdfFile
+  currentUserMarks: CurrentUserMark[]
+  handleMarkClick: (id: number) => void
+  selectedMarkValue: string
+  selectedMark: CurrentUserMark | null
+}
+
+/**
+ * Responsible for displaying pages of a single Pdf File.
+ */
+const PdfItem = ({
+  pdfFile,
+  currentUserMarks,
+  handleMarkClick,
+  selectedMarkValue,
+  selectedMark
+}: PdfItemProps) => {
+  const filterByPage = (
+    marks: CurrentUserMark[],
+    page: number
+  ): CurrentUserMark[] => {
+    return marks.filter((m) => m.mark.location.page === page)
+  }
+  return pdfFile.pages.map((page, i) => {
+    return (
+      <PdfPageItem
+        page={page}
+        key={i}
+        currentUserMarks={filterByPage(currentUserMarks, i)}
+        handleMarkClick={handleMarkClick}
+        selectedMarkValue={selectedMarkValue}
+        selectedMark={selectedMark}
+      />
+    )
+  })
+}
+
+export default PdfItem

src/components/PDFView/PdfMarkItem.tsx

@@ -0,0 +1,43 @@
+import { CurrentUserMark } from '../../types/mark.ts'
+import styles from '../DrawPDFFields/style.module.scss'
+import { inPx } from '../../utils/pdf.ts'
+
+interface PdfMarkItemProps {
+  userMark: CurrentUserMark
+  handleMarkClick: (id: number) => void
+  selectedMarkValue: string
+  selectedMark: CurrentUserMark | null
+}
+
+/**
+ * Responsible for display an individual Pdf Mark.
+ */
+const PdfMarkItem = ({
+  selectedMark,
+  handleMarkClick,
+  selectedMarkValue,
+  userMark
+}: PdfMarkItemProps) => {
+  const { location } = userMark.mark
+  const handleClick = () => handleMarkClick(userMark.mark.id)
+  const getMarkValue = () =>
+    selectedMark?.mark.id === userMark.mark.id
+      ? selectedMarkValue
+      : userMark.mark.value
+  return (
+    <div
+      onClick={handleClick}
+      className={styles.drawingRectangle}
+      style={{
+        left: inPx(location.left),
+        top: inPx(location.top),
+        width: inPx(location.width),
+        height: inPx(location.height)
+      }}
+    >
+      {getMarkValue()}
+    </div>
+  )
+}
+
+export default PdfMarkItem

src/components/PDFView/PdfMarking.tsx

@@ -0,0 +1,103 @@
+import PdfView from './index.tsx'
+import MarkFormField from '../../pages/sign/MarkFormField.tsx'
+import { PdfFile } from '../../types/drawing.ts'
+import { CurrentUserMark, Mark } from '../../types/mark.ts'
+import React, { useState, useEffect } from 'react'
+import {
+  findNextCurrentUserMark,
+  isCurrentUserMarksComplete,
+  updateCurrentUserMarks
+} from '../../utils'
+import { EMPTY } from '../../utils/const.ts'
+import { Container } from '../Container'
+import styles from '../../pages/sign/style.module.scss'
+
+interface PdfMarkingProps {
+  files: { pdfFile: PdfFile; filename: string; hash: string | null }[]
+  currentUserMarks: CurrentUserMark[]
+  setIsReadyToSign: (isReadyToSign: boolean) => void
+  setCurrentUserMarks: (currentUserMarks: CurrentUserMark[]) => void
+  setUpdatedMarks: (markToUpdate: Mark) => void
+}
+
+/**
+ * Top-level component responsible for displaying Pdfs, Pages, and Marks,
+ * as well as tracking if the document is ready to be signed.
+ * @param props
+ * @constructor
+ */
+const PdfMarking = (props: PdfMarkingProps) => {
+  const {
+    files,
+    currentUserMarks,
+    setIsReadyToSign,
+    setCurrentUserMarks,
+    setUpdatedMarks
+  } = props
+  const [selectedMark, setSelectedMark] = useState<CurrentUserMark | null>(null)
+  const [selectedMarkValue, setSelectedMarkValue] = useState<string>('')
+
+  useEffect(() => {
+    setSelectedMark(findNextCurrentUserMark(currentUserMarks) || null)
+  }, [currentUserMarks])
+
+  const handleMarkClick = (id: number) => {
+    const nextMark = currentUserMarks.find((mark) => mark.mark.id === id)
+    setSelectedMark(nextMark!)
+    setSelectedMarkValue(nextMark?.mark.value ?? EMPTY)
+  }
+
+  const handleSubmit = (event: React.FormEvent<HTMLFormElement>) => {
+    event.preventDefault()
+    if (!selectedMarkValue || !selectedMark) return
+
+    const updatedMark: CurrentUserMark = {
+      ...selectedMark,
+      mark: {
+        ...selectedMark.mark,
+        value: selectedMarkValue
+      },
+      isCompleted: true
+    }
+
+    setSelectedMarkValue(EMPTY)
+    const updatedCurrentUserMarks = updateCurrentUserMarks(
+      currentUserMarks,
+      updatedMark
+    )
+    setCurrentUserMarks(updatedCurrentUserMarks)
+    setSelectedMark(findNextCurrentUserMark(updatedCurrentUserMarks) || null)
+    console.log(isCurrentUserMarksComplete(updatedCurrentUserMarks))
+    setIsReadyToSign(isCurrentUserMarksComplete(updatedCurrentUserMarks))
+    setUpdatedMarks(updatedMark.mark)
+  }
+
+  const handleChange = (event: React.ChangeEvent<HTMLInputElement>) =>
+    setSelectedMarkValue(event.target.value)
+
+  return (
+    <>
+      <Container className={styles.container}>
+        {currentUserMarks?.length > 0 && (
+          <PdfView
+            files={files}
+            handleMarkClick={handleMarkClick}
+            selectedMarkValue={selectedMarkValue}
+            selectedMark={selectedMark}
+            currentUserMarks={currentUserMarks}
+          />
+        )}
+        {selectedMark !== null && (
+          <MarkFormField
+            handleSubmit={handleSubmit}
+            handleChange={handleChange}
+            selectedMark={selectedMark}
+            selectedMarkValue={selectedMarkValue}
+          />
+        )}
+      </Container>
+    </>
+  )
+}
+
+export default PdfMarking

src/components/PDFView/PdfPageItem.tsx

@@ -0,0 +1,46 @@
+import styles from '../DrawPDFFields/style.module.scss'
+import { PdfPage } from '../../types/drawing.ts'
+import { CurrentUserMark } from '../../types/mark.ts'
+import PdfMarkItem from './PdfMarkItem.tsx'
+interface PdfPageProps {
+  page: PdfPage
+  currentUserMarks: CurrentUserMark[]
+  handleMarkClick: (id: number) => void
+  selectedMarkValue: string
+  selectedMark: CurrentUserMark | null
+}
+
+/**
+ * Responsible for rendering a single Pdf Page and its Marks
+ */
+const PdfPageItem = ({
+  page,
+  currentUserMarks,
+  handleMarkClick,
+  selectedMarkValue,
+  selectedMark
+}: PdfPageProps) => {
+  return (
+    <div
+      className={styles.pdfImageWrapper}
+      style={{
+        border: '1px solid #c4c4c4',
+        marginBottom: '10px',
+        marginTop: '10px'
+      }}
+    >
+      <img draggable="false" src={page.image} style={{ width: '100%' }} />
+      {currentUserMarks.map((m, i) => (
+        <PdfMarkItem
+          key={i}
+          handleMarkClick={handleMarkClick}
+          selectedMarkValue={selectedMarkValue}
+          userMark={m}
+          selectedMark={selectedMark}
+        />
+      ))}
+    </div>
+  )
+}
+
+export default PdfPageItem

src/components/PDFView/index.tsx

@@ -0,0 +1,51 @@
+import { PdfFile } from '../../types/drawing.ts'
+import { Box } from '@mui/material'
+import PdfItem from './PdfItem.tsx'
+import { CurrentUserMark } from '../../types/mark.ts'
+
+interface PdfViewProps {
+  files: { pdfFile: PdfFile; filename: string; hash: string | null }[]
+  currentUserMarks: CurrentUserMark[]
+  handleMarkClick: (id: number) => void
+  selectedMarkValue: string
+  selectedMark: CurrentUserMark | null
+}
+
+/**
+ * Responsible for rendering Pdf files.
+ */
+const PdfView = ({
+  files,
+  currentUserMarks,
+  handleMarkClick,
+  selectedMarkValue,
+  selectedMark
+}: PdfViewProps) => {
+  const filterByFile = (
+    currentUserMarks: CurrentUserMark[],
+    hash: string
+  ): CurrentUserMark[] => {
+    return currentUserMarks.filter(
+      (currentUserMark) => currentUserMark.mark.pdfFileHash === hash
+    )
+  }
+  return (
+    <Box sx={{ width: '100%' }}>
+      {files.map(({ pdfFile, hash }, i) => {
+        if (!hash) return
+        return (
+          <PdfItem
+            pdfFile={pdfFile}
+            key={i}
+            currentUserMarks={filterByFile(currentUserMarks, hash)}
+            selectedMark={selectedMark}
+            handleMarkClick={handleMarkClick}
+            selectedMarkValue={selectedMarkValue}
+          />
+        )
+      })}
+    </Box>
+  )
+}
+
+export default PdfView

src/components/PDFView/style.module.scss

@@ -0,0 +1,16 @@
+.imageWrapper {
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  width: 100%; /* Adjust as needed */
+  height: 100%; /* Adjust as needed */
+  overflow: hidden; /* Ensure no overflow */
+  border: 1px solid #ccc; /* Optional: for visual debugging */
+  background-color: #e0f7fa; /* Optional: for visual debugging */
+}
+
+.image {
+  max-width: 100%;
+  max-height: 100%;
+  object-fit: contain; /* Ensure the image fits within the container */
+}

src/controllers/MetadataController.ts

@@ -16,6 +16,13 @@ import { queryNip05 } from '../utils'
 import NDK, { NDKEvent, NDKSubscription } from '@nostr-dev-kit/ndk'
 import { EventEmitter } from 'tseep'
 import { localCache } from '../services'
+import {
+  findRelayListAndUpdateCache,
+  findRelayListInCache,
+  getDefaultRelaySet,
+  getUserRelaySet,
+  isOlderThanOneWeek
+} from '../utils/relays.ts'
 
 export class MetadataController extends EventEmitter {
   private nostrController: NostrController
@@ -127,10 +134,8 @@ export class MetadataController extends EventEmitter {
 
     // If cached metadata is found, check its validity
     if (cachedMetadataEvent) {
-      const oneWeekInMS = 7 * 24 * 60 * 60 * 1000 // Number of milliseconds in one week
-
       // Check if the cached metadata is older than one week
-      if (Date.now() - cachedMetadataEvent.cachedAt > oneWeekInMS) {
+      if (isOlderThanOneWeek(cachedMetadataEvent.cachedAt)) {
         // If older than one week, find the metadata from relays in background
 
         this.checkForMoreRecentMetadata(hexKey, cachedMetadataEvent.event)
@@ -144,100 +149,32 @@ export class MetadataController extends EventEmitter {
     return this.checkForMoreRecentMetadata(hexKey, null)
   }
 
-  public findRelayListMetadata = async (hexKey: string) => {
-    let relayEvent: Event | null = null
+  /**
+   * Based on the hexKey of the current user, this method attempts to retrieve a relay set.
+   * @func findRelayListInCache first checks if there is already an up-to-date
+   * relay list available in cache; if not -
+   * @func findRelayListAndUpdateCache checks if the relevant relay event is available from
+   * the purple pages relay;
+   * @func findRelayListAndUpdateCache will run again if the previous two calls return null and
+   * check if the relevant relay event can be obtained from 'most popular relays'
+   * If relay event is found, it will be saved in cache for future use
+   * @param hexKey of the current user
+   * @return RelaySet which will contain either relays extracted from the user Relay Event
+   * or a fallback RelaySet with Sigit's Relay
+   */
+  public findRelayListMetadata = async (hexKey: string): Promise<RelaySet> => {
+    const relayEvent =
+      (await findRelayListInCache(hexKey)) ||
+      (await findRelayListAndUpdateCache(
+        [this.specialMetadataRelay],
+        hexKey
+      )) ||
+      (await findRelayListAndUpdateCache(
+        await this.nostrController.getMostPopularRelays(),
+        hexKey
+      ))
 
-    // Attempt to retrieve the metadata event from the local cache
-    const cachedRelayListMetadataEvent =
-      await localCache.getUserRelayListMetadata(hexKey)
-
-    if (cachedRelayListMetadataEvent) {
-      const oneWeekInMS = 7 * 24 * 60 * 60 * 1000 // Number of milliseconds in one week
-
-      // Check if the cached event is not older than one week
-      if (Date.now() - cachedRelayListMetadataEvent.cachedAt < oneWeekInMS) {
-        relayEvent = cachedRelayListMetadataEvent.event
-      }
-    }
-
-    // define filter for relay list
-    const eventFilter: Filter = {
-      kinds: [kinds.RelayList],
-      authors: [hexKey]
-    }
-
-    const pool = new SimplePool()
-
-    // Try to get the relayList event from a special relay (wss://purplepag.es)
-    if (!relayEvent) {
-      relayEvent = await pool
-        .get([this.specialMetadataRelay], eventFilter)
-        .then((event) => {
-          if (event) {
-            // update the event in local cache
-            localCache.addUserRelayListMetadata(event)
-          }
-          return event
-        })
-        .catch((err) => {
-          console.error(err)
-          return null
-        })
-    }
-
-    if (!relayEvent) {
-      // If no valid relayList event is found from the special relay, get the most popular relays
-      const mostPopularRelays =
-        await this.nostrController.getMostPopularRelays()
-
-      // Query the most popular relays for relayList event
-      relayEvent = await pool
-        .get(mostPopularRelays, eventFilter)
-        .then((event) => {
-          if (event) {
-            // update the event in local cache
-            localCache.addUserRelayListMetadata(event)
-          }
-          return event
-        })
-        .catch((err) => {
-          console.error(err)
-          return null
-        })
-    }
-
-    if (relayEvent) {
-      const relaySet: RelaySet = {
-        read: [],
-        write: []
-      }
-
-      // a list of r tags with relay URIs and a read or write marker.
-      const relayTags = relayEvent.tags.filter((tag) => tag[0] === 'r')
-
-      // Relays marked as read / write are called READ / WRITE relays, respectively
-      relayTags.forEach((tag) => {
-        if (tag.length >= 3) {
-          const marker = tag[2]
-
-          if (marker === 'read') {
-            relaySet.read.push(tag[1])
-          } else if (marker === 'write') {
-            relaySet.write.push(tag[1])
-          }
-        }
-
-        // If the marker is omitted, the relay is used for both purposes
-        if (tag.length === 2) {
-          relaySet.read.push(tag[1])
-          relaySet.write.push(tag[1])
-        }
-      })
-
-      return relaySet
-    }
-
-    throw new Error('No relay list metadata found.')
+    return relayEvent ? getUserRelaySet(relayEvent.tags) : getDefaultRelaySet()
   }
 
   public extractProfileMetadataContent = (event: Event) => {

src/controllers/NostrController.ts

@@ -44,6 +44,7 @@ import {
   getNsecBunkerDelegatedKey,
   verifySignedEvent
 } from '../utils'
+import { getDefaultRelayMap } from '../utils/relays.ts'
 
 export class NostrController extends EventEmitter {
   private static instance: NostrController
@@ -650,7 +651,7 @@ export class NostrController extends EventEmitter {
    */
   getRelayMap = async (
     npub: string
-  ): Promise<{ map: RelayMap; mapUpdated: number }> => {
+  ): Promise<{ map: RelayMap; mapUpdated?: number }> => {
     const mostPopularRelays = await this.getMostPopularRelays()
 
     const pool = new SimplePool()
@@ -691,7 +692,7 @@ export class NostrController extends EventEmitter {
 
       return Promise.resolve({ map: relaysMap, mapUpdated: event.created_at })
     } else {
-      return Promise.reject('User relays were not found.')
+      return Promise.resolve({ map: getDefaultRelayMap() })
     }
   }
 

src/data/metaSamples.json

@@ -0,0 +1,76 @@
+{
+  "creatorMetaExample": {
+    "fileHashes": {
+      "firstPdfFile.pdf": "da5f857e77d3aa59c461efad804116931c059b36e6b4da0b5d9452753ec70c05",
+      "da5f857e77d3aa59c461efad804116931c059b36e6b4da0b5d9452753ec70c05/1.png": "hash123png1",
+      "da5f857e77d3aa59c461efad804116931c059b36e6b4da0b5d9452753ec70c05/2.png": "hash321png2"
+    },
+    "markConfig": {
+      "npub1x77qywdllzetv9ncnhlfpv62kshlgtt0uqlsq3v22uzzkk2xvvrsn6uyfy": {
+        "da5f857e77d3aa59c461efad804116931c059b36e6b4da0b5d9452753ec70c05/1.png": [
+          {
+            "id": 1,
+            "type": "FULLNAME",
+            "markLocation": {
+              "top": 56,
+              "left": 306,
+              "height": 200,
+              "width": 100,
+              "page": 1
+            },
+            "npub": "npub1x77qywdllzetv9ncnhlfpv62kshlgtt0uqlsq3v22uzzkk2xvvrsn6uyfy",
+            "pdfFileHash": "da5f857e77d3aa59c461efad804116931c059b36e6b4da0b5d9452753ec70c05"
+          }
+        ],
+        "da5f857e77d3aa59c461efad804116931c059b36e6b4da0b5d9452753ec70c05/2.png": [
+          {
+            "id": 2,
+            "markType": "FULLNAME",
+            "location": {
+              "top": 76,
+              "left": 283,
+              "height": 150,
+              "width": 123,
+              "page": 2
+            },
+            "npub": "npub1x77qywdllzetv9ncnhlfpv62kshlgtt0uqlsq3v22uzzkk2xvvrsn6uyfy",
+            "pdfFileHash": "da5f857e77d3aa59c461efad804116931c059b36e6b4da0b5d9452753ec70c05"
+          }
+        ]
+      }
+    }
+  },
+  "docSignatureExample": {
+    "prevSig": "10de030dd2bfafbbd34969645bd0b3f5e8ab71b3b32091fb29bbea5e272f8a3b7284ef667b6a02e9becc1036450d9fbe5c1c6d146fa91d70e0d8f3cd54d64f17",
+    "marks": [
+        {
+          "id": 1,
+          "type": "FULLNAME",
+          "markLocation": {
+            "top": 56,
+            "left": 306,
+            "height": 200,
+            "width": 100,
+            "page": 1
+          },
+          "npub": "npub1x77qywdllzetv9ncnhlfpv62kshlgtt0uqlsq3v22uzzkk2xvvrsn6uyfy",
+          "pdfFileHash": "da5f857e77d3aa59c461efad804116931c059b36e6b4da0b5d9452753ec70c05",
+          "value": "Pera Peric"
+        },
+        {
+          "id": 2,
+          "markType": "FULLNAME",
+          "location": {
+            "top": 76,
+            "left": 283,
+            "height": 150,
+            "width": 123,
+            "page": 2
+          },
+          "npub": "npub1x77qywdllzetv9ncnhlfpv62kshlgtt0uqlsq3v22uzzkk2xvvrsn6uyfy",
+          "pdfFileHash": "da5f857e77d3aa59c461efad804116931c059b36e6b4da0b5d9452753ec70c05",
+          "value": "Pera Peric"
+        }
+      ]
+    }
+  }

src/layouts/Main.tsx

@@ -136,7 +136,7 @@ export const MainLayout = () => {
       }
 
       setIsLoading(true)
-      setLoadingSpinnerDesc(`Loading SIGit History`)
+      setLoadingSpinnerDesc(`Loading SIGit history...`)
       getUsersAppData()
         .then((appData) => {
           if (appData) {

src/pages/create/index.tsx

@@ -59,12 +59,16 @@ import {
   updateUsersAppData,
   uploadToFileStorage
 } from '../../utils'
+import { Container } from '../../components/Container'
 import styles from './style.module.scss'
+import { PdfFile } from '../../types/drawing'
+import { DrawPDFFields } from '../../components/DrawPDFFields'
+import { Mark } from '../../types/mark.ts'
 
 export const CreatePage = () => {
   const navigate = useNavigate()
   const location = useLocation()
-  const { uploadedFile } = location.state || {}
+  const { uploadedFiles } = location.state || {}
 
   const [isLoading, setIsLoading] = useState(false)
   const [loadingSpinnerDesc, setLoadingSpinnerDesc] = useState('')
@@ -84,16 +88,56 @@ export const CreatePage = () => {
 
   const nostrController = NostrController.getInstance()
 
+  const [metadata, setMetadata] = useState<{ [key: string]: ProfileMetadata }>(
+    {}
+  )
+  const [drawnPdfs, setDrawnPdfs] = useState<PdfFile[]>([])
+
+  useEffect(() => {
+    users.forEach((user) => {
+      if (!(user.pubkey in metadata)) {
+        const metadataController = new MetadataController()
+
+        const handleMetadataEvent = (event: Event) => {
+          const metadataContent =
+            metadataController.extractProfileMetadataContent(event)
+          if (metadataContent)
+            setMetadata((prev) => ({
+              ...prev,
+              [user.pubkey]: metadataContent
+            }))
+        }
+
+        metadataController.on(user.pubkey, (kind: number, event: Event) => {
+          if (kind === kinds.Metadata) {
+            handleMetadataEvent(event)
+          }
+        })
+
+        metadataController
+          .findMetadata(user.pubkey)
+          .then((metadataEvent) => {
+            if (metadataEvent) handleMetadataEvent(metadataEvent)
+          })
+          .catch((err) => {
+            console.error(
+              `error occurred in finding metadata for: ${user.pubkey}`,
+              err
+            )
+          })
+      }
+    })
+  }, [metadata, users])
   // Set up event listener for authentication event
   nostrController.on('nsecbunker-auth', (url) => {
     setAuthUrl(url)
   })
 
   useEffect(() => {
-    if (uploadedFile) {
-      setSelectedFiles([uploadedFile])
+    if (uploadedFiles) {
+      setSelectedFiles([...uploadedFiles])
     }
-  }, [uploadedFile])
+  }, [uploadedFiles])
 
   useEffect(() => {
     if (usersPubkey) {
@@ -265,14 +309,16 @@ export const CreatePage = () => {
   }
 
   // Handle errors during file arrayBuffer conversion
-  const handleFileError = (file: File) => (err: any) => {
+  const handleFileError = (file: File) => (err: unknown) => {
     console.log(
       `Error while getting arrayBuffer of file ${file.name} :>> `,
       err
     )
+    if (err instanceof Error) {
       toast.error(
         err.message || `Error while getting arrayBuffer of file ${file.name}`
       )
+    }
     return null
   }
 
@@ -297,11 +343,39 @@ export const CreatePage = () => {
     return fileHashes
   }
 
+  const createMarks = (fileHashes: { [key: string]: string }): Mark[] => {
+    return drawnPdfs
+      .flatMap((drawnPdf) => {
+        const fileHash = fileHashes[drawnPdf.file.name]
+        return drawnPdf.pages.flatMap((page, index) => {
+          return page.drawnFields.map((drawnField) => {
+            return {
+              type: drawnField.type,
+              location: {
+                page: index,
+                top: drawnField.top,
+                left: drawnField.left,
+                height: drawnField.height,
+                width: drawnField.width
+              },
+              npub: drawnField.counterpart,
+              pdfFileHash: fileHash
+            }
+          })
+        })
+      })
+      .map((mark, index) => {
+        return { ...mark, id: index }
+      })
+  }
+
   // Handle errors during zip file generation
-  const handleZipError = (err: any) => {
+  const handleZipError = (err: unknown) => {
     console.log('Error in zip:>> ', err)
     setIsLoading(false)
+    if (err instanceof Error) {
       toast.error(err.message || 'Error occurred in generating zip file')
+    }
     return null
   }
 
@@ -309,15 +383,13 @@ export const CreatePage = () => {
   const generateZipFile = async (zip: JSZip): Promise<ArrayBuffer | null> => {
     setLoadingSpinnerDesc('Generating zip file')
 
-    const arraybuffer = await zip
+    return await zip
       .generateAsync({
         type: 'arraybuffer',
         compression: 'DEFLATE',
         compressionOptions: { level: 6 }
       })
       .catch(handleZipError)
-
-    return arraybuffer
   }
 
   // Encrypt the zip file with the generated encryption key
@@ -364,22 +436,18 @@ export const CreatePage = () => {
 
     if (!arraybuffer) return null
 
-    const finalZipFile = new File(
-      [new Blob([arraybuffer])],
-      `${unixNow}.sigit.zip`,
-      {
+    return new File([new Blob([arraybuffer])], `${unixNow}.sigit.zip`, {
       type: 'application/zip'
-      }
-    )
-
-    return finalZipFile
+    })
   }
 
   // Handle errors during file upload
-  const handleUploadError = (err: any) => {
+  const handleUploadError = (err: unknown) => {
     console.log('Error in upload:>> ', err)
     setIsLoading(false)
+    if (err instanceof Error) {
       toast.error(err.message || 'Error occurred in uploading file')
+    }
     return null
   }
 
@@ -394,14 +462,12 @@ export const CreatePage = () => {
       type: 'application/sigit'
     })
 
-    const fileUrl = await uploadToFileStorage(file)
+    return await uploadToFileStorage(file)
       .then((url) => {
         toast.success('files.zip uploaded to file storage')
         return url
       })
       .catch(handleUploadError)
-
-    return fileUrl
   }
 
   // Manage offline scenarios for signing or viewing the file
@@ -414,9 +480,13 @@ export const CreatePage = () => {
       encryptionKey
     )
 
-    if (!finalZipFile) return
+    if (!finalZipFile) {
+      setIsLoading(false)
+      return
+    }
 
-    saveAs(finalZipFile, 'request.sigit.zip')
+    saveAs(finalZipFile, `request-${now()}.sigit.zip`)
+    setIsLoading(false)
   }
 
   const generateFilesZip = async (): Promise<ArrayBuffer | null> => {
@@ -425,15 +495,13 @@ export const CreatePage = () => {
       zip.file(file.name, file)
     })
 
-    const arraybuffer = await zip
+    return await zip
       .generateAsync({
         type: 'arraybuffer',
         compression: 'DEFLATE',
         compressionOptions: { level: 6 }
       })
       .catch(handleZipError)
-
-    return arraybuffer
   }
 
   const generateCreateSignature = async (
@@ -444,11 +512,13 @@ export const CreatePage = () => {
   ) => {
     const signers = users.filter((user) => user.role === UserRole.signer)
     const viewers = users.filter((user) => user.role === UserRole.viewer)
+    const markConfig = createMarks(fileHashes)
 
     const content: CreateSignatureEventContent = {
       signers: signers.map((signer) => hexToNpub(signer.pubkey)),
       viewers: viewers.map((viewer) => hexToNpub(viewer.pubkey)),
       fileHashes,
+      markConfig,
       zipUrl,
       title
     }
@@ -482,11 +552,7 @@ export const CreatePage = () => {
         : viewers.map((viewer) => viewer.pubkey)
     ).filter((receiver) => receiver !== usersPubkey)
 
-    const promises = receivers.map((receiver) =>
-      sendNotification(receiver, meta)
-    )
-
-    return promises
+    return receivers.map((receiver) => sendNotification(receiver, meta))
   }
 
   const handleCreate = async () => {
@@ -603,9 +669,11 @@ export const CreatePage = () => {
       }
 
       const arrayBuffer = await generateZipFile(zip)
-      if (!arrayBuffer) return
+      if (!arrayBuffer) {
+        setIsLoading(false)
+        return
+      }
 
-      setLoadingSpinnerDesc('Encrypting zip file')
       const encryptedArrayBuffer = await encryptZipFile(
         arrayBuffer,
         encryptionKey
@@ -615,6 +683,10 @@ export const CreatePage = () => {
     }
   }
 
+  const onDrawFieldsChange = (pdfFiles: PdfFile[]) => {
+    setDrawnPdfs(pdfFiles)
+  }
+
   if (authUrl) {
     return (
       <iframe
@@ -629,7 +701,7 @@ export const CreatePage = () => {
   return (
     <>
       {isLoading && <LoadingSpinner desc={loadingSpinnerDesc} />}
-      <Box className={styles.container}>
+      <Container className={styles.container}>
         <TextField
           label="Title"
           value={title}
@@ -697,23 +769,34 @@ export const CreatePage = () => {
             </Box>
           </Box>
         </Box>
+
         <DisplayUser
+          metadata={metadata}
           users={users}
           handleUserRoleChange={handleUserRoleChange}
           handleRemoveUser={handleRemoveUser}
           moveSigner={moveSigner}
         />
-        <Box sx={{ mt: 1, display: 'flex', justifyContent: 'center' }}>
+
+        <DrawPDFFields
+          metadata={metadata}
+          users={users}
+          selectedFiles={selectedFiles}
+          onDrawFieldsChange={onDrawFieldsChange}
+        />
+
+        <Box sx={{ mt: 1, mb: 5, display: 'flex', justifyContent: 'center' }}>
           <Button onClick={handleCreate} variant="contained">
             Create
           </Button>
         </Box>
-      </Box>
+      </Container>
     </>
   )
 }
 
 type DisplayUsersProps = {
+  metadata: { [key: string]: ProfileMetadata }
   users: User[]
   handleUserRoleChange: (role: UserRole, pubkey: string) => void
   handleRemoveUser: (pubkey: string) => void
@@ -721,51 +804,12 @@ type DisplayUsersProps = {
 }
 
 const DisplayUser = ({
+  metadata,
   users,
   handleUserRoleChange,
   handleRemoveUser,
   moveSigner
 }: DisplayUsersProps) => {
-  const [metadata, setMetadata] = useState<{ [key: string]: ProfileMetadata }>(
-    {}
-  )
-
-  useEffect(() => {
-    users.forEach((user) => {
-      if (!(user.pubkey in metadata)) {
-        const metadataController = new MetadataController()
-
-        const handleMetadataEvent = (event: Event) => {
-          const metadataContent =
-            metadataController.extractProfileMetadataContent(event)
-          if (metadataContent)
-            setMetadata((prev) => ({
-              ...prev,
-              [user.pubkey]: metadataContent
-            }))
-        }
-
-        metadataController.on(user.pubkey, (kind: number, event: Event) => {
-          if (kind === kinds.Metadata) {
-            handleMetadataEvent(event)
-          }
-        })
-
-        metadataController
-          .findMetadata(user.pubkey)
-          .then((metadataEvent) => {
-            if (metadataEvent) handleMetadataEvent(metadataEvent)
-          })
-          .catch((err) => {
-            console.error(
-              `error occurred in finding metadata for: ${user.pubkey}`,
-              err
-            )
-          })
-      }
-    })
-  }, [users])
-
   return (
     <TableContainer component={Paper} elevation={3} sx={{ marginTop: '20px' }}>
       <Table>
@@ -935,7 +979,7 @@ const SignerRow = ({
     item: () => {
       return { id: user.pubkey, index }
     },
-    collect: (monitor: any) => ({
+    collect: (monitor) => ({
       isDragging: monitor.isDragging()
     })
   })

src/pages/create/style.module.scss

@@ -6,6 +6,8 @@
   color: $text-color;
   margin-top: 10px;
   gap: 10px;
+  width: 550px;
+  max-width: 550px;
 
   .inputBlock {
     display: flex;

src/pages/home/index.tsx

@@ -1,6 +1,6 @@
 import { Button, TextField } from '@mui/material'
 import JSZip from 'jszip'
-import { useEffect, useRef, useState } from 'react'
+import { useCallback, useEffect, useState } from 'react'
 import { useNavigate } from 'react-router-dom'
 import { toast } from 'react-toastify'
 import { useAppSelector } from '../../hooks'
@@ -10,7 +10,7 @@ import { FontAwesomeIcon } from '@fortawesome/react-fontawesome'
 import { faSearch } from '@fortawesome/free-solid-svg-icons'
 import { Select } from '../../components/Select'
 import { DisplaySigit } from '../../components/DisplaySigit'
-
+import { useDropzone } from 'react-dropzone'
 import { Container } from '../../components/Container'
 import styles from './style.module.scss'
 import {
@@ -24,8 +24,8 @@ const FILTERS = [
   'Show all',
   // 'Drafts',
   'In-progress',
-  'Completed',
-  'Archived'
+  'Completed'
+  // 'Archived'
 ] as const
 type Filter = (typeof FILTERS)[number]
 
@@ -40,7 +40,6 @@ type Sort = (typeof SORT_BY)[number]['value']
 
 export const HomePage = () => {
   const navigate = useNavigate()
-  const fileInputRef = useRef<HTMLInputElement>(null)
 
   const [sigits, setSigits] = useState<{ [key: string]: Meta }>({})
   const [parsedSigits, setParsedSigits] = useState<{
@@ -74,17 +73,12 @@ export const HomePage = () => {
     }
   }, [usersAppData])
 
-  const handleUploadClick = () => {
-    if (fileInputRef.current) {
-      fileInputRef.current.click()
-    }
-  }
+  const onDrop = useCallback(
+    async (acceptedFiles: File[]) => {
+      // When uploading single file check if it's .sigit.zip
+      if (acceptedFiles.length === 1) {
+        const file = acceptedFiles[0]
 
-  const handleFileChange = async (
-    event: React.ChangeEvent<HTMLInputElement>
-  ) => {
-    const file = event.target.files?.[0]
-    if (file) {
         // Check if the file extension is .sigit.zip
         const fileName = file.name
         const fileExtension = fileName.slice(-10) // ".sigit.zip" has 10 characters
@@ -111,14 +105,20 @@ export const HomePage = () => {
             })
           }
 
-        toast.error('Invalid zip file')
+          toast.error('Invalid SiGit zip file')
           return
         }
+      }
 
       // navigate to create page
-      navigate(appPrivateRoutes.create, { state: { uploadedFile: file } })
-    }
-  }
+      navigate(appPrivateRoutes.create, {
+        state: { uploadedFiles: acceptedFiles }
+      })
+    },
+    [navigate]
+  )
+
+  const { getRootProps, getInputProps, isDragActive } = useDropzone({ onDrop })
 
   const [search, setSearch] = useState('')
   const [filter, setFilter] = useState<Filter>('Show all')
@@ -202,15 +202,15 @@ export const HomePage = () => {
           </form>
         </div>
       </div>
-      <div className={styles.dropzone} onClick={handleUploadClick}>
-        <input
-          id="fileUpload"
-          type="file"
-          hidden
-          ref={fileInputRef}
-          onChange={handleFileChange}
-        />
-        <div>Click or drag files to upload!</div>
+      <div className={styles.dropzone}>
+        <div {...getRootProps()}>
+          <input {...getInputProps()} />
+          {isDragActive ? (
+            <p>Drop the files here ...</p>
+          ) : (
+            <p>Click or drag files to upload!</p>
+          )}
+        </div>
       </div>
       <div className={styles.submissions}>
         {Object.keys(parsedSigits)

src/pages/settings/relays/index.tsx

@@ -91,7 +91,8 @@ export const RelaysPage = () => {
         if (isMounted) {
           if (
             !relaysState?.mapUpdated ||
-            newRelayMap.mapUpdated > relaysState?.mapUpdated
+            (newRelayMap?.mapUpdated !== undefined &&
+              newRelayMap?.mapUpdated > relaysState?.mapUpdated)
           ) {
             if (
               !relaysState?.map ||

src/pages/sign/MarkFormField.tsx

@@ -0,0 +1,37 @@
+import { CurrentUserMark } from '../../types/mark.ts'
+import styles from './style.module.scss'
+import { Box, Button, TextField } from '@mui/material'
+
+import { MARK_TYPE_TRANSLATION } from '../../utils/const.ts'
+
+interface MarkFormFieldProps {
+  handleSubmit: (event: any) => void
+  handleChange: (event: any) => void
+  selectedMark: CurrentUserMark
+  selectedMarkValue: string
+}
+
+/**
+ * Responsible for rendering a form field connected to a mark and keeping track of its value.
+ */
+const MarkFormField = (props: MarkFormFieldProps) => {
+  const { handleSubmit, handleChange, selectedMark, selectedMarkValue } = props
+  const getSubmitButton = () => (selectedMark.isLast ? 'Complete' : 'Next')
+  return (
+    <div className={styles.fixedBottomForm}>
+      <Box component="form" onSubmit={handleSubmit}>
+        <TextField
+          id="mark-value"
+          label={MARK_TYPE_TRANSLATION[selectedMark.mark.type.valueOf()]}
+          value={selectedMarkValue}
+          onChange={handleChange}
+        />
+        <Button type="submit" variant="contained">
+          {getSubmitButton()}
+        </Button>
+      </Box>
+    </div>
+  )
+}
+
+export default MarkFormField

src/pages/sign/index.tsx

@@ -5,7 +5,7 @@ import JSZip from 'jszip'
 import _ from 'lodash'
 import { MuiFileInput } from 'mui-file-input'
 import { Event, verifyEvent } from 'nostr-tools'
-import { useEffect, useState } from 'react'
+import { useCallback, useEffect, useState } from 'react'
 import { useSelector } from 'react-redux'
 import { useLocation, useNavigate } from 'react-router-dom'
 import { toast } from 'react-toastify'
@@ -17,12 +17,15 @@ import { CreateSignatureEventContent, Meta, SignedEvent } from '../../types'
 import {
   decryptArrayBuffer,
   encryptArrayBuffer,
+  extractMarksFromSignedMeta,
   extractZipUrlAndEncryptionKey,
   generateEncryptionKey,
   generateKeysFile,
+  getFilesWithHashes,
   getHash,
   hexToNpub,
   isOnline,
+  loadZip,
   now,
   npubToHex,
   parseJson,
@@ -31,9 +34,20 @@ import {
   signEventForMetaFile,
   updateUsersAppData
 } from '../../utils'
+import { Container } from '../../components/Container'
 import { DisplayMeta } from './internal/displayMeta'
 import styles from './style.module.scss'
-import { Container } from '../../components/Container'
+import { PdfFile } from '../../types/drawing.ts'
+import { convertToPdfFile } from '../../utils/pdf.ts'
+import { CurrentUserMark, Mark } from '../../types/mark.ts'
+import { getLastSignersSig } from '../../utils/sign.ts'
+import {
+  filterMarksByPubkey,
+  getCurrentUserMarks,
+  isCurrentUserMarksComplete,
+  updateMarks
+} from '../../utils'
+import PdfMarking from '../../components/PDFView/PdfMarking.tsx'
 enum SignedStatus {
   Fully_Signed,
   User_Is_Next_Signer,
@@ -59,7 +73,7 @@ export const SignPage = () => {
 
   const [selectedFile, setSelectedFile] = useState<File | null>(null)
 
-  const [files, setFiles] = useState<{ [filename: string]: ArrayBuffer }>({})
+  const [files, setFiles] = useState<{ [filename: string]: PdfFile }>({})
 
   const [isLoading, setIsLoading] = useState(true)
   const [loadingSpinnerDesc, setLoadingSpinnerDesc] = useState('')
@@ -71,6 +85,7 @@ export const SignPage = () => {
 
   const [signers, setSigners] = useState<`npub1${string}`[]>([])
   const [viewers, setViewers] = useState<`npub1${string}`[]>([])
+  const [marks, setMarks] = useState<Mark[]>([])
   const [creatorFileHashes, setCreatorFileHashes] = useState<{
     [key: string]: string
   }>({})
@@ -89,6 +104,10 @@ export const SignPage = () => {
 
   const [authUrl, setAuthUrl] = useState<string>()
   const nostrController = NostrController.getInstance()
+  const [currentUserMarks, setCurrentUserMarks] = useState<CurrentUserMark[]>(
+    []
+  )
+  const [isReadyToSign, setIsReadyToSign] = useState(false)
 
   useEffect(() => {
     if (signers.length > 0) {
@@ -179,6 +198,18 @@ export const SignPage = () => {
       setViewers(createSignatureContent.viewers)
       setCreatorFileHashes(createSignatureContent.fileHashes)
       setSubmittedBy(createSignatureEvent.pubkey)
+      setMarks(createSignatureContent.markConfig)
+
+      if (usersPubkey) {
+        const metaMarks = filterMarksByPubkey(
+          createSignatureContent.markConfig,
+          usersPubkey!
+        )
+        const signedMarks = extractMarksFromSignedMeta(meta)
+        const currentUserMarks = getCurrentUserMarks(metaMarks, signedMarks)
+        setCurrentUserMarks(currentUserMarks)
+        setIsReadyToSign(isCurrentUserMarksComplete(currentUserMarks))
+      }
 
       setSignedBy(Object.keys(meta.docSignatures) as `npub1${string}`[])
     }
@@ -186,149 +217,13 @@ export const SignPage = () => {
     if (meta) {
       handleUpdatedMeta(meta)
     }
-  }, [meta])
+  }, [meta, usersPubkey])
 
-  useEffect(() => {
-    if (metaInNavState) {
-      const processSigit = async () => {
-        setIsLoading(true)
-        setLoadingSpinnerDesc('Extracting zipUrl and encryption key from meta')
-
-        const res = await extractZipUrlAndEncryptionKey(metaInNavState)
-        if (!res) {
-          setIsLoading(false)
-          return
-        }
-
-        const { zipUrl, encryptionKey } = res
-
-        setLoadingSpinnerDesc('Fetching file from file server')
-        axios
-          .get(zipUrl, {
-            responseType: 'arraybuffer'
-          })
-          .then((res) => {
-            handleArrayBufferFromBlossom(res.data, encryptionKey)
-            setMeta(metaInNavState)
-          })
-          .catch((err) => {
-            console.error(`error occurred in getting file from ${zipUrl}`, err)
-            toast.error(
-              err.message || `error occurred in getting file from ${zipUrl}`
-            )
-          })
-          .finally(() => {
-            setIsLoading(false)
-          })
-      }
-
-      processSigit()
-    } else if (decryptedArrayBuffer) {
-      handleDecryptedArrayBuffer(decryptedArrayBuffer).finally(() =>
-        setIsLoading(false)
-      )
-    } else if (uploadedZip) {
-      decrypt(uploadedZip)
-        .then((arrayBuffer) => {
-          if (arrayBuffer) handleDecryptedArrayBuffer(arrayBuffer)
-        })
-        .catch((err) => {
-          console.error(`error occurred in decryption`, err)
-          toast.error(err.message || `error occurred in decryption`)
-        })
-        .finally(() => {
-          setIsLoading(false)
-        })
-    } else {
-      setIsLoading(false)
-      setDisplayInput(true)
-    }
-  }, [decryptedArrayBuffer, uploadedZip, metaInNavState])
-
-  const handleArrayBufferFromBlossom = async (
-    arrayBuffer: ArrayBuffer,
-    encryptionKey: string
-  ) => {
-    // array buffer returned from blossom is encrypted.
-    // So, first decrypt it
-    const decrypted = await decryptArrayBuffer(
-      arrayBuffer,
-      encryptionKey
-    ).catch((err) => {
-      console.log('err in decryption:>> ', err)
-      toast.error(err.message || 'An error occurred in decrypting file.')
-      setIsLoading(false)
-      return null
-    })
-
-    if (!decrypted) return
-
-    const zip = await JSZip.loadAsync(decrypted).catch((err) => {
-      console.log('err in loading zip file :>> ', err)
-      toast.error(err.message || 'An error occurred in loading zip file.')
-      setIsLoading(false)
-      return null
-    })
-
-    if (!zip) return
-
-    const files: { [filename: string]: ArrayBuffer } = {}
-    const fileHashes: { [key: string]: string | null } = {}
-    const fileNames = Object.values(zip.files).map((entry) => entry.name)
-
-    // generate hashes for all files in zipArchive
-    // these hashes can be used to verify the originality of files
-    for (const fileName of fileNames) {
-      const arrayBuffer = await readContentOfZipEntry(
-        zip,
-        fileName,
-        'arraybuffer'
-      )
-
-      if (arrayBuffer) {
-        files[fileName] = arrayBuffer
-
-        const hash = await getHash(arrayBuffer)
-        if (hash) {
-          fileHashes[fileName] = hash
-        }
-      } else {
-        fileHashes[fileName] = null
-      }
-    }
-
-    setFiles(files)
-    setCurrentFileHashes(fileHashes)
-  }
-
-  const parseKeysJson = async (zip: JSZip) => {
-    const keysFileContent = await readContentOfZipEntry(
-      zip,
-      'keys.json',
-      'string'
-    )
-
-    if (!keysFileContent) return null
-
-    const parsedJSON = await parseJson<{ sender: string; keys: string[] }>(
-      keysFileContent
-    ).catch((err) => {
-      console.log(`Error parsing content of keys.json:`, err)
-      toast.error(err.message || `Error parsing content of keys.json`)
-      return null
-    })
-
-    return parsedJSON
-  }
-
-  const decrypt = async (file: File) => {
+  const decrypt = useCallback(
+    async (file: File) => {
       setLoadingSpinnerDesc('Decrypting file')
 
-    const zip = await JSZip.loadAsync(file).catch((err) => {
-      console.log('err in loading zip file :>> ', err)
-      toast.error(err.message || 'An error occurred in loading zip file.')
-      return null
-    })
+      const zip = await loadZip(file)
       if (!zip) return
 
       const parsedKeysJson = await parseKeysJson(zip)
@@ -392,6 +287,142 @@ export const SignPage = () => {
       }
 
       return null
+    },
+    [nostrController]
+  )
+
+  useEffect(() => {
+    // online mode - from create and home page views
+    if (metaInNavState) {
+      const processSigit = async () => {
+        setIsLoading(true)
+        setLoadingSpinnerDesc('Extracting zipUrl and encryption key from meta')
+
+        const res = await extractZipUrlAndEncryptionKey(metaInNavState)
+        if (!res) {
+          setIsLoading(false)
+          return
+        }
+
+        const { zipUrl, encryptionKey } = res
+
+        setLoadingSpinnerDesc('Fetching file from file server')
+        axios
+          .get(zipUrl, {
+            responseType: 'arraybuffer'
+          })
+          .then((res) => {
+            handleArrayBufferFromBlossom(res.data, encryptionKey)
+            setMeta(metaInNavState)
+          })
+          .catch((err) => {
+            console.error(`error occurred in getting file from ${zipUrl}`, err)
+            toast.error(
+              err.message || `error occurred in getting file from ${zipUrl}`
+            )
+          })
+          .finally(() => {
+            setIsLoading(false)
+          })
+      }
+
+      processSigit()
+    } else if (decryptedArrayBuffer) {
+      handleDecryptedArrayBuffer(decryptedArrayBuffer).finally(() =>
+        setIsLoading(false)
+      )
+    } else if (uploadedZip) {
+      decrypt(uploadedZip)
+        .then((arrayBuffer) => {
+          if (arrayBuffer) handleDecryptedArrayBuffer(arrayBuffer)
+        })
+        .catch((err) => {
+          console.error(`error occurred in decryption`, err)
+          toast.error(err.message || `error occurred in decryption`)
+        })
+        .finally(() => {
+          setIsLoading(false)
+        })
+    } else {
+      setIsLoading(false)
+      setDisplayInput(true)
+    }
+  }, [decryptedArrayBuffer, uploadedZip, metaInNavState, decrypt])
+
+  const handleArrayBufferFromBlossom = async (
+    arrayBuffer: ArrayBuffer,
+    encryptionKey: string
+  ) => {
+    // array buffer returned from blossom is encrypted.
+    // So, first decrypt it
+    const decrypted = await decryptArrayBuffer(
+      arrayBuffer,
+      encryptionKey
+    ).catch((err) => {
+      console.log('err in decryption:>> ', err)
+      toast.error(err.message || 'An error occurred in decrypting file.')
+      setIsLoading(false)
+      return null
+    })
+
+    if (!decrypted) return
+
+    const zip = await loadZip(decrypted)
+    if (!zip) {
+      setIsLoading(false)
+      return
+    }
+
+    const files: { [filename: string]: PdfFile } = {}
+    const fileHashes: { [key: string]: string | null } = {}
+    const fileNames = Object.values(zip.files).map((entry) => entry.name)
+
+    // generate hashes for all files in zipArchive
+    // these hashes can be used to verify the originality of files
+    for (const fileName of fileNames) {
+      const arrayBuffer = await readContentOfZipEntry(
+        zip,
+        fileName,
+        'arraybuffer'
+      )
+
+      if (arrayBuffer) {
+        files[fileName] = await convertToPdfFile(arrayBuffer, fileName)
+
+        const hash = await getHash(arrayBuffer)
+        if (hash) {
+          fileHashes[fileName] = hash
+        }
+      } else {
+        fileHashes[fileName] = null
+      }
+    }
+
+    setFiles(files)
+    setCurrentFileHashes(fileHashes)
+  }
+
+  const setUpdatedMarks = (markToUpdate: Mark) => {
+    const updatedMarks = updateMarks(marks, markToUpdate)
+    setMarks(updatedMarks)
+  }
+
+  const parseKeysJson = async (zip: JSZip) => {
+    const keysFileContent = await readContentOfZipEntry(
+      zip,
+      'keys.json',
+      'string'
+    )
+
+    if (!keysFileContent) return null
+
+    return await parseJson<{ sender: string; keys: string[] }>(
+      keysFileContent
+    ).catch((err) => {
+      console.log(`Error parsing content of keys.json:`, err)
+      toast.error(err.message || `Error parsing content of keys.json`)
+      return null
+    })
   }
 
   const handleDecryptedArrayBuffer = async (arrayBuffer: ArrayBuffer) => {
@@ -399,32 +430,27 @@ export const SignPage = () => {
 
     setLoadingSpinnerDesc('Parsing zip file')
 
-    const zip = await JSZip.loadAsync(decryptedZipFile).catch((err) => {
-      console.log('err in loading zip file :>> ', err)
-      toast.error(err.message || 'An error occurred in loading zip file.')
-      return null
-    })
-
+    const zip = await loadZip(decryptedZipFile)
     if (!zip) return
 
-    const files: { [filename: string]: ArrayBuffer } = {}
+    const files: { [filename: string]: PdfFile } = {}
     const fileHashes: { [key: string]: string | null } = {}
     const fileNames = Object.values(zip.files)
       .filter((entry) => entry.name.startsWith('files/') && !entry.dir)
       .map((entry) => entry.name)
+      .map((entry) => entry.replace(/^files\//, ''))
 
     // generate hashes for all entries in files folder of zipArchive
     // these hashes can be used to verify the originality of files
-    for (let fileName of fileNames) {
+    for (const fileName of fileNames) {
       const arrayBuffer = await readContentOfZipEntry(
         zip,
         fileName,
         'arraybuffer'
       )
 
-      fileName = fileName.replace(/^files\//, '')
       if (arrayBuffer) {
-        files[fileName] = arrayBuffer
+        files[fileName] = await convertToPdfFile(arrayBuffer, fileName)
 
         const hash = await getHash(arrayBuffer)
         if (hash) {
@@ -488,7 +514,10 @@ export const SignPage = () => {
     const prevSig = getPrevSignersSig(hexToNpub(usersPubkey!))
     if (!prevSig) return
 
-    const signedEvent = await signEventForMeta(prevSig)
+    const marks = getSignerMarksForMeta()
+    if (!marks) return
+
+    const signedEvent = await signEventForMeta({ prevSig, marks })
     if (!signedEvent) return
 
     const updatedMeta = updateMetaSignatures(meta, signedEvent)
@@ -502,14 +531,22 @@ export const SignPage = () => {
   }
 
   // Sign the event for the meta file
-  const signEventForMeta = async (prevSig: string) => {
+  const signEventForMeta = async (signerContent: {
+    prevSig: string
+    marks: Mark[]
+  }) => {
     return await signEventForMetaFile(
-      JSON.stringify({ prevSig }),
+      JSON.stringify(signerContent),
       nostrController,
       setIsLoading
     )
   }
 
+  const getSignerMarksForMeta = (): Mark[] | undefined => {
+    if (currentUserMarks.length === 0) return
+    return currentUserMarks.map(({ mark }: CurrentUserMark) => mark)
+  }
+
   // Update the meta signatures
   const updateMetaSignatures = (meta: Meta, signedEvent: SignedEvent): Meta => {
     const metaCopy = _.cloneDeep(meta)
@@ -527,7 +564,7 @@ export const SignPage = () => {
     encryptionKey: string
   ): Promise<File | null> => {
     // Get the current timestamp in seconds
-    const unixNow = Math.floor(Date.now() / 1000)
+    const unixNow = now()
     const blob = new Blob([encryptedArrayBuffer])
     // Create a File object with the Blob data
     const file = new File([blob], `compressed.sigit`, {
@@ -577,22 +614,18 @@ export const SignPage = () => {
 
     if (!arraybuffer) return null
 
-    const finalZipFile = new File(
-      [new Blob([arraybuffer])],
-      `${unixNow}.sigit.zip`,
-      {
+    return new File([new Blob([arraybuffer])], `${unixNow}.sigit.zip`, {
       type: 'application/zip'
-      }
-    )
-
-    return finalZipFile
+    })
   }
 
   // Handle errors during zip file generation
-  const handleZipError = (err: any) => {
+  const handleZipError = (err: unknown) => {
     console.log('Error in zip:>> ', err)
     setIsLoading(false)
+    if (err instanceof Error) {
       toast.error(err.message || 'Error occurred in generating zip file')
+    }
     return null
   }
 
@@ -673,7 +706,9 @@ export const SignPage = () => {
     setIsLoading(true)
     setLoadingSpinnerDesc('Signing nostr event')
 
-    const prevSig = getLastSignersSig()
+    if (!meta) return
+
+    const prevSig = getLastSignersSig(meta, signers)
     if (!prevSig) return
 
     const signedEvent = await signEventForMetaFile(
@@ -701,9 +736,9 @@ export const SignPage = () => {
 
     zip.file('meta.json', stringifiedMeta)
 
-    Object.entries(files).forEach(([fileName, arrayBuffer]) => {
-      zip.file(`files/${fileName}`, arrayBuffer)
-    })
+    for (const [fileName, pdf] of Object.entries(files)) {
+      zip.file(`files/${fileName}`, await pdf.file.arrayBuffer())
+    }
 
     const arrayBuffer = await zip
       .generateAsync({
@@ -723,7 +758,7 @@ export const SignPage = () => {
     if (!arrayBuffer) return
 
     const blob = new Blob([arrayBuffer])
-    const unixNow = Math.floor(Date.now() / 1000)
+    const unixNow = now()
     saveAs(blob, `exported-${unixNow}.sigit.zip`)
 
     setIsLoading(false)
@@ -740,9 +775,9 @@ export const SignPage = () => {
 
     zip.file('meta.json', stringifiedMeta)
 
-    Object.entries(files).forEach(([fileName, arrayBuffer]) => {
-      zip.file(`files/${fileName}`, arrayBuffer)
-    })
+    for (const [fileName, pdf] of Object.entries(files)) {
+      zip.file(`files/${fileName}`, await pdf.file.arrayBuffer())
+    }
 
     const arrayBuffer = await zip
       .generateAsync({
@@ -769,7 +804,7 @@ export const SignPage = () => {
     const finalZipFile = await createFinalZipFile(encryptedArrayBuffer, key)
 
     if (!finalZipFile) return
-    const unixNow = Math.floor(Date.now() / 1000)
+    const unixNow = now()
     saveAs(finalZipFile, `exported-${unixNow}.sigit.zip`)
   }
 
@@ -806,37 +841,6 @@ export const SignPage = () => {
     }
   }
 
-  /**
-   * This function returns the signature of last signer
-   * It will be used in the content of export signature's signedEvent
-   */
-  const getLastSignersSig = () => {
-    if (!meta) return null
-
-    // if there're no signers then use creator's signature
-    if (signers.length === 0) {
-      try {
-        const createSignatureEvent: Event = JSON.parse(meta.createSignature)
-        return createSignatureEvent.sig
-      } catch (error) {
-        return null
-      }
-    }
-
-    // get last signer
-    const lastSigner = signers[signers.length - 1]
-
-    // get the signature of last signer
-    try {
-      const lastSignatureEvent: Event = JSON.parse(
-        meta.docSignatures[lastSigner]
-      )
-      return lastSignatureEvent.sig
-    } catch (error) {
-      return null
-    }
-  }
-
   if (authUrl) {
     return (
       <iframe
@@ -848,9 +852,13 @@ export const SignPage = () => {
     )
   }
 
+  if (isLoading) {
+    return <LoadingSpinner desc={loadingSpinnerDesc} />
+  }
+
+  if (isReadyToSign) {
     return (
       <>
-      {isLoading && <LoadingSpinner desc={loadingSpinnerDesc} />}
         <Container className={styles.container}>
           {displayInput && (
             <>
@@ -921,3 +929,14 @@ export const SignPage = () => {
       </>
     )
   }
+
+  return (
+    <PdfMarking
+      files={getFilesWithHashes(files, currentFileHashes)}
+      currentUserMarks={currentUserMarks}
+      setIsReadyToSign={setIsReadyToSign}
+      setCurrentUserMarks={setCurrentUserMarks}
+      setUpdatedMarks={setUpdatedMarks}
+    />
+  )
+}

src/pages/sign/internal/displayMeta.tsx

@@ -34,10 +34,11 @@ import { UserAvatar } from '../../../components/UserAvatar'
 import { MetadataController } from '../../../controllers'
 import { npubToHex, shorten, hexToNpub, parseJson } from '../../../utils'
 import styles from '../style.module.scss'
+import { PdfFile } from '../../../types/drawing.ts'
 
 type DisplayMetaProps = {
   meta: Meta
-  files: { [filename: string]: ArrayBuffer }
+  files: { [filename: string]: PdfFile }
   submittedBy: string
   signers: `npub1${string}`[]
   viewers: `npub1${string}`[]
@@ -143,7 +144,7 @@ export const DisplayMeta = ({
   }, [users, submittedBy])
 
   const downloadFile = async (filename: string) => {
-    const arrayBuffer = files[filename]
+    const arrayBuffer = await files[filename].file.arrayBuffer()
     if (!arrayBuffer) return
 
     const blob = new Blob([arrayBuffer])

src/pages/sign/style.module.scss

@@ -2,6 +2,8 @@
 
 .container {
   color: $text-color;
+  width: 550px;
+  max-width: 550px;
 
   .inputBlock {
     position: relative;
@@ -47,4 +49,40 @@
       @extend .user;
     }
   }
+
+  .fixedBottomForm {
+    position: fixed;
+    bottom: 0;
+    left: 50%;
+    transform: translateX(-50%);
+    width: 100%;
+    max-width: 500px;
+    height: 100px;
+    border-top: 1px solid #ccc;
+    box-shadow: 0 -2px 5px rgba(0, 0, 0, 0.1);
+    padding: 10px 20px;
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    //z-index: 200;
+  }
+
+  .fixedBottomForm input[type="text"] {
+    width: 80%;
+    padding: 10px;
+    font-size: 16px;
+    border: 1px solid #ccc;
+    border-radius: 4px;
+  }
+
+  .fixedBottomForm button {
+    background-color: #3f3d56;
+    color: white;
+    border: none;
+    padding: 10px 20px;
+    font-size: 16px;
+    margin-left: 10px;
+    border-radius: 4px;
+    cursor: pointer;
+  }
 }

src/pages/verify/index.tsx

@@ -15,7 +15,7 @@ import { useEffect, useState } from 'react'
 import { toast } from 'react-toastify'
 import { LoadingSpinner } from '../../components/LoadingSpinner'
 import { UserAvatar } from '../../components/UserAvatar'
-import { MetadataController } from '../../controllers'
+import { MetadataController, NostrController } from '../../controllers'
 import {
   CreateSignatureEventContent,
   Meta,
@@ -24,18 +24,32 @@ import {
 } from '../../types'
 import {
   decryptArrayBuffer,
+  extractMarksFromSignedMeta,
   extractZipUrlAndEncryptionKey,
   getHash,
   hexToNpub,
+  now,
   npubToHex,
   parseJson,
   readContentOfZipEntry,
-  shorten
+  shorten,
+  signEventForMetaFile
 } from '../../utils'
 import styles from './style.module.scss'
 import { Cancel, CheckCircle } from '@mui/icons-material'
 import { useLocation } from 'react-router-dom'
 import axios from 'axios'
+import { PdfFile } from '../../types/drawing.ts'
+import {
+  addMarks,
+  convertToPdfBlob,
+  convertToPdfFile,
+  groupMarksByPage
+} from '../../utils/pdf.ts'
+import { State } from '../../store/rootReducer.ts'
+import { useSelector } from 'react-redux'
+import { getLastSignersSig } from '../../utils/sign.ts'
+import { saveAs } from 'file-saver'
 import { Container } from '../../components/Container'
 
 export const VerifyPage = () => {
@@ -67,10 +81,13 @@ export const VerifyPage = () => {
   const [currentFileHashes, setCurrentFileHashes] = useState<{
     [key: string]: string | null
   }>({})
+  const [files, setFiles] = useState<{ [filename: string]: PdfFile }>({})
 
   const [metadata, setMetadata] = useState<{ [key: string]: ProfileMetadata }>(
     {}
   )
+  const usersPubkey = useSelector((state: State) => state.auth.usersPubkey)
+  const nostrController = NostrController.getInstance()
 
   useEffect(() => {
     if (uploadedZip) {
@@ -125,6 +142,7 @@ export const VerifyPage = () => {
 
               if (!zip) return
 
+              const files: { [filename: string]: PdfFile } = {}
               const fileHashes: { [key: string]: string | null } = {}
               const fileNames = Object.values(zip.files).map(
                 (entry) => entry.name
@@ -140,6 +158,10 @@ export const VerifyPage = () => {
                 )
 
                 if (arrayBuffer) {
+                  files[fileName] = await convertToPdfFile(
+                    arrayBuffer,
+                    fileName!
+                  )
                   const hash = await getHash(arrayBuffer)
 
                   if (hash) {
@@ -151,6 +173,7 @@ export const VerifyPage = () => {
               }
 
               setCurrentFileHashes(fileHashes)
+              setFiles(files)
 
               setSigners(createSignatureContent.signers)
               setViewers(createSignatureContent.viewers)
@@ -360,6 +383,73 @@ export const VerifyPage = () => {
     }
   }
 
+  const handleExport = async () => {
+    if (Object.entries(files).length === 0 || !meta || !usersPubkey) return
+
+    const usersNpub = hexToNpub(usersPubkey)
+    if (
+      !signers.includes(usersNpub) &&
+      !viewers.includes(usersNpub) &&
+      submittedBy !== usersNpub
+    ) {
+      return
+    }
+
+    setIsLoading(true)
+    setLoadingSpinnerDesc('Signing nostr event')
+
+    if (!meta) return
+
+    const prevSig = getLastSignersSig(meta, signers)
+    if (!prevSig) return
+
+    const signedEvent = await signEventForMetaFile(
+      JSON.stringify({ prevSig }),
+      nostrController,
+      setIsLoading
+    )
+
+    if (!signedEvent) return
+
+    const exportSignature = JSON.stringify(signedEvent, null, 2)
+    const updatedMeta = { ...meta, exportSignature }
+    const stringifiedMeta = JSON.stringify(updatedMeta, null, 2)
+
+    const zip = new JSZip()
+    zip.file('meta.json', stringifiedMeta)
+
+    const marks = extractMarksFromSignedMeta(updatedMeta)
+    const marksByPage = groupMarksByPage(marks)
+
+    for (const [fileName, pdf] of Object.entries(files)) {
+      const pages = await addMarks(pdf.file, marksByPage)
+      const blob = await convertToPdfBlob(pages)
+      zip.file(`/files/${fileName}`, blob)
+    }
+
+    const arrayBuffer = await zip
+      .generateAsync({
+        type: 'arraybuffer',
+        compression: 'DEFLATE',
+        compressionOptions: {
+          level: 6
+        }
+      })
+      .catch((err) => {
+        console.log('err in zip:>> ', err)
+        setIsLoading(false)
+        toast.error(err.message || 'Error occurred in generating zip file')
+        return null
+      })
+
+    if (!arrayBuffer) return
+
+    const blob = new Blob([arrayBuffer])
+    saveAs(blob, `exported-${now()}.sigit.zip`)
+
+    setIsLoading(false)
+  }
+
   const displayUser = (pubkey: string, verifySignature = false) => {
     const profile = metadata[pubkey]
 
@@ -522,6 +612,11 @@ export const VerifyPage = () => {
                   Exported By
                 </Typography>
                 {displayExportedBy()}
+                <Box sx={{ mt: 1, display: 'flex', justifyContent: 'center' }}>
+                  <Button onClick={handleExport} variant="contained">
+                    Export Sigit
+                  </Button>
+                </Box>
               </ListItem>
 
               {signers.length > 0 && (

src/types/core.ts

@@ -1,3 +1,4 @@
+import { Mark } from './mark'
 import { Keys } from '../store/auth/types'
 
 export enum UserRole {
@@ -22,12 +23,14 @@ export interface CreateSignatureEventContent {
   signers: `npub1${string}`[]
   viewers: `npub1${string}`[]
   fileHashes: { [key: string]: string }
+  markConfig: Mark[]
   title: string
   zipUrl: string
 }
 
 export interface SignedEventContent {
   prevSig: string
+  marks: Mark[]
 }
 
 export interface Sigit {

src/types/drawing.ts

@@ -0,0 +1,49 @@
+export interface MouseState {
+  clicked?: boolean
+  dragging?: boolean
+  resizing?: boolean
+  coordsInWrapper?: {
+    mouseX: number
+    mouseY: number
+  }
+}
+
+export interface PdfFile {
+  file: File
+  pages: PdfPage[]
+  expanded?: boolean
+}
+
+export interface PdfPage {
+  image: string
+  drawnFields: DrawnField[]
+}
+
+export interface DrawnField {
+  left: number
+  top: number
+  width: number
+  height: number
+  type: MarkType
+  /**
+   * npub of a counter part
+   */
+  counterpart: string
+}
+
+export interface DrawTool {
+  identifier: MarkType
+  label: string
+  icon: JSX.Element
+  defaultValue?: string
+  selected?: boolean
+  active?: boolean
+}
+
+export enum MarkType {
+  SIGNATURE = 'SIGNATURE',
+  JOBTITLE = 'JOBTITLE',
+  FULLNAME = 'FULLNAME',
+  DATE = 'DATE',
+  DATETIME = 'DATETIME'
+}

src/types/mark.ts

@@ -0,0 +1,24 @@
+import { MarkType } from './drawing'
+
+export interface CurrentUserMark {
+  mark: Mark
+  isLast: boolean
+  isCompleted: boolean
+}
+
+export interface Mark {
+  id: number
+  npub: string
+  pdfFileHash: string
+  type: MarkType
+  location: MarkLocation
+  value?: string
+}
+
+export interface MarkLocation {
+  top: number
+  left: number
+  height: number
+  width: number
+  page: number
+}

src/types/profile.ts

@@ -1,6 +1,7 @@
 export interface ProfileMetadata {
   name?: string
   display_name?: string
+  username?: string
   picture?: string
   banner?: string
   about?: string

src/types/zip.ts

@@ -10,4 +10,19 @@ export interface OutputByType {
   nodebuffer: Buffer
 }
 
+interface InputByType {
+  base64: string
+  string: string
+  text: string
+  binarystring: string
+  array: number[]
+  uint8array: Uint8Array
+  arraybuffer: ArrayBuffer
+  blob: Blob
+  stream: NodeJS.ReadableStream
+}
+
 export type OutputType = keyof OutputByType
+export type InputFileFormat =
+  | InputByType[keyof InputByType]
+  | Promise<InputByType[keyof InputByType]>

src/utils/const.ts

@@ -0,0 +1,12 @@
+import { MarkType } from '../types/drawing.ts'
+
+export const EMPTY: string = ''
+export const MARK_TYPE_TRANSLATION: { [key: string]: string } = {
+  [MarkType.FULLNAME.valueOf()]: 'Full Name'
+}
+/**
+ * Number of milliseconds in one week.
+ * Calc based on: 7 * 24 * 60 * 60 * 1000
+ */
+export const ONE_WEEK_IN_MS: number = 604800000
+export const SIGIT_RELAY: string = 'wss://relay.sigit.io'

src/utils/index.ts

@@ -6,3 +6,4 @@ export * from './nostr'
 export * from './string'
 export * from './zip'
 export * from './utils'
+export * from './mark'

src/utils/mark.ts

@@ -0,0 +1,110 @@
+import { CurrentUserMark, Mark } from '../types/mark.ts'
+import { hexToNpub } from './nostr.ts'
+import { Meta, SignedEventContent } from '../types'
+import { Event } from 'nostr-tools'
+
+/**
+ * Takes in an array of Marks already filtered by User.
+ * Returns an array of CurrentUserMarks with correct values mix-and-matched.
+ * @param marks - default Marks extracted from Meta
+ * @param signedMetaMarks - signed user Marks extracted from DocSignatures
+ */
+const getCurrentUserMarks = (
+  marks: Mark[],
+  signedMetaMarks: Mark[]
+): CurrentUserMark[] => {
+  return marks.map((mark, index, arr) => {
+    const signedMark = signedMetaMarks.find((m) => m.id === mark.id)
+    if (signedMark && !!signedMark.value) {
+      mark.value = signedMark.value
+    }
+    return {
+      mark,
+      isLast: isLast(index, arr),
+      isCompleted: !!mark.value
+    }
+  })
+}
+
+/**
+ * Returns next incomplete CurrentUserMark if there is one
+ * @param usersMarks
+ */
+const findNextCurrentUserMark = (
+  usersMarks: CurrentUserMark[]
+): CurrentUserMark | undefined => {
+  return usersMarks.find((mark) => !mark.isCompleted)
+}
+
+/**
+ * Returns Marks that are assigned to a specific user
+ * @param marks
+ * @param pubkey
+ */
+const filterMarksByPubkey = (marks: Mark[], pubkey: string): Mark[] => {
+  return marks.filter((mark) => mark.npub === hexToNpub(pubkey))
+}
+
+/**
+ * Takes Signed Doc Signatures part of Meta and extracts
+ * all Marks into one flar array, regardless of the user.
+ * @param meta
+ */
+const extractMarksFromSignedMeta = (meta: Meta): Mark[] => {
+  return Object.values(meta.docSignatures)
+    .map((val: string) => JSON.parse(val as string))
+    .map((val: Event) => JSON.parse(val.content))
+    .flatMap((val: SignedEventContent) => val.marks)
+}
+
+/**
+ * Checks the CurrentUserMarks array that every element in that array has been
+ * marked as complete.
+ * @param currentUserMarks
+ */
+const isCurrentUserMarksComplete = (
+  currentUserMarks: CurrentUserMark[]
+): boolean => {
+  return currentUserMarks.every((mark) => mark.isCompleted)
+}
+
+/**
+ * Inserts an updated mark into an existing array of marks. Returns a copy of the
+ * existing array with a new value inserted
+ * @param marks
+ * @param markToUpdate
+ */
+const updateMarks = (marks: Mark[], markToUpdate: Mark): Mark[] => {
+  const indexToUpdate = marks.findIndex((mark) => mark.id === markToUpdate.id)
+  return [
+    ...marks.slice(0, indexToUpdate),
+    markToUpdate,
+    ...marks.slice(indexToUpdate + 1)
+  ]
+}
+
+const updateCurrentUserMarks = (
+  currentUserMarks: CurrentUserMark[],
+  markToUpdate: CurrentUserMark
+): CurrentUserMark[] => {
+  const indexToUpdate = currentUserMarks.findIndex(
+    (m) => m.mark.id === markToUpdate.mark.id
+  )
+  return [
+    ...currentUserMarks.slice(0, indexToUpdate),
+    markToUpdate,
+    ...currentUserMarks.slice(indexToUpdate + 1)
+  ]
+}
+
+const isLast = <T>(index: number, arr: T[]) => index === arr.length - 1
+
+export {
+  getCurrentUserMarks,
+  filterMarksByPubkey,
+  extractMarksFromSignedMeta,
+  isCurrentUserMarksComplete,
+  findNextCurrentUserMark,
+  updateMarks,
+  updateCurrentUserMarks
+}

src/utils/misc.ts

@@ -83,14 +83,12 @@ export const signEventForMetaFile = async (
   }
 
   // Sign the event
-  const signedEvent = await nostrController.signEvent(event).catch((err) => {
+  return await nostrController.signEvent(event).catch((err) => {
     console.error(err)
     toast.error(err.message || 'Error occurred in signing nostr event')
     setIsLoading(false) // Set loading state to false
     return null
   })
-
-  return signedEvent // Return the signed event
 }
 
 /**

src/utils/nostr.ts

@@ -120,6 +120,7 @@ export const queryNip05 = async (
   if (!match) throw new Error('Invalid nip05')
 
   // Destructure the match result, assigning default value '_' to name if not provided
+  // First variable from the match destructuring is ignored
   const [, name = '_', domain] = match
 
   // Construct the URL to query the NIP-05 data

src/utils/pdf.ts

@@ -0,0 +1,263 @@
+import { PdfFile, PdfPage } from '../types/drawing.ts'
+import * as PDFJS from 'pdfjs-dist'
+import { PDFDocument } from 'pdf-lib'
+import { Mark } from '../types/mark.ts'
+
+PDFJS.GlobalWorkerOptions.workerSrc = new URL(
+  'pdfjs-dist/build/pdf.worker.min.mjs',
+  import.meta.url
+).toString()
+
+/**
+ * Scale between the PDF page's natural size and rendered size
+ * @constant {number}
+ */
+const SCALE: number = 3
+/**
+ * Defined font size used when generating a PDF. Currently it is difficult to fully
+ * correlate font size used at the time of filling in / drawing on the PDF
+ * because it is dynamically rendered, and the final size.
+ * This should be fixed going forward.
+ * Switching to PDF-Lib will most likely make this problem redundant.
+ */
+const FONT_SIZE: number = 40
+/**
+ * Current font type used when generating a PDF.
+ */
+const FONT_TYPE: string = 'Arial'
+
+/**
+ * Converts a PDF ArrayBuffer to a generic PDF File
+ * @param arrayBuffer of a PDF
+ * @param fileName identifier of the pdf file
+ */
+const toFile = (arrayBuffer: ArrayBuffer, fileName: string): File => {
+  const blob = new Blob([arrayBuffer], { type: 'application/pdf' })
+  return new File([blob], fileName, { type: 'application/pdf' })
+}
+
+/**
+ * Converts a generic PDF File to Sigit's internal Pdf File type
+ * @param {File} file
+ * @return {PdfFile} Sigit's internal PDF File type
+ */
+const toPdfFile = async (file: File): Promise<PdfFile> => {
+  const data = await readPdf(file)
+  const pages = await pdfToImages(data)
+  return { file, pages, expanded: false }
+}
+/**
+ * Transforms an array of generic PDF Files into an array of Sigit's
+ * internal representation of Pdf Files
+ * @param selectedFiles - an array of generic PDF Files
+ * @return PdfFile[] - an array of Sigit's internal Pdf File type
+ */
+const toPdfFiles = async (selectedFiles: File[]): Promise<PdfFile[]> => {
+  return Promise.all(selectedFiles.filter(isPdf).map(toPdfFile))
+}
+
+/**
+ * A utility that transforms a drawing coordinate number into a CSS-compatible string
+ * @param coordinate
+ */
+const inPx = (coordinate: number): string => `${coordinate}px`
+
+/**
+ * A utility that checks if a given file is of the pdf type
+ * @param file
+ */
+const isPdf = (file: File) => file.type.toLowerCase().includes('pdf')
+
+/**
+ * Reads the pdf file binaries
+ */
+const readPdf = (file: File): Promise<string> => {
+  return new Promise((resolve, reject) => {
+    const reader = new FileReader()
+
+    reader.onload = (e: any) => {
+      const data = e.target.result
+
+      resolve(data)
+    }
+
+    reader.onerror = (err) => {
+      console.error('err', err)
+      reject(err)
+    }
+
+    reader.readAsDataURL(file)
+  })
+}
+
+/**
+ * Converts pdf to the images
+ * @param data pdf file bytes
+ */
+const pdfToImages = async (data: any): Promise<PdfPage[]> => {
+  const images: string[] = []
+  const pdf = await PDFJS.getDocument(data).promise
+  const canvas = document.createElement('canvas')
+
+  for (let i = 0; i < pdf.numPages; i++) {
+    const page = await pdf.getPage(i + 1)
+    const viewport = page.getViewport({ scale: SCALE })
+    const context = canvas.getContext('2d')
+    canvas.height = viewport.height
+    canvas.width = viewport.width
+    await page.render({ canvasContext: context!, viewport: viewport }).promise
+    images.push(canvas.toDataURL())
+  }
+
+  return Promise.resolve(
+    images.map((image) => {
+      return {
+        image,
+        drawnFields: []
+      }
+    })
+  )
+}
+
+/**
+ * Takes in individual pdf file and an object with Marks grouped by Page number
+ * Returns an array of encoded images where each image is a representation
+ * of a PDF page with completed and signed marks from all users
+ */
+const addMarks = async (
+  file: File,
+  marksPerPage: { [key: string]: Mark[] }
+) => {
+  const p = await readPdf(file)
+  const pdf = await PDFJS.getDocument(p).promise
+  const canvas = document.createElement('canvas')
+
+  const images: string[] = []
+
+  for (let i = 0; i < pdf.numPages; i++) {
+    const page = await pdf.getPage(i + 1)
+    const viewport = page.getViewport({ scale: SCALE })
+    const context = canvas.getContext('2d')
+    canvas.height = viewport.height
+    canvas.width = viewport.width
+    await page.render({ canvasContext: context!, viewport: viewport }).promise
+
+    marksPerPage[i].forEach((mark) => draw(mark, context!))
+
+    images.push(canvas.toDataURL())
+  }
+
+  return Promise.resolve(images)
+}
+
+/**
+ * Utility to scale mark in line with the PDF-to-PNG scale
+ */
+const scaleMark = (mark: Mark): Mark => {
+  const { location } = mark
+  return {
+    ...mark,
+    location: {
+      ...location,
+      width: location.width * SCALE,
+      height: location.height * SCALE,
+      left: location.left * SCALE,
+      top: location.top * SCALE
+    }
+  }
+}
+
+/**
+ * Utility to check if a Mark has value
+ * @param mark
+ */
+const hasValue = (mark: Mark): boolean => !!mark.value
+
+/**
+ * Draws a Mark on a Canvas representation of a PDF Page
+ * @param mark to be drawn
+ * @param ctx a Canvas representation of a specific PDF Page
+ */
+const draw = (mark: Mark, ctx: CanvasRenderingContext2D) => {
+  const { location } = mark
+
+  ctx!.font = FONT_SIZE + 'px ' + FONT_TYPE
+  ctx!.fillStyle = 'black'
+  const textMetrics = ctx!.measureText(mark.value!)
+  const textX = location.left + (location.width - textMetrics.width) / 2
+  const textY = location.top + (location.height + parseInt(ctx!.font)) / 2
+  ctx!.fillText(mark.value!, textX, textY)
+}
+
+/**
+ * Takes an array of encoded PDF pages and returns a blob that is a complete PDF file
+ * @param markedPdfPages
+ */
+const convertToPdfBlob = async (markedPdfPages: string[]): Promise<Blob> => {
+  const pdfDoc = await PDFDocument.create()
+
+  for (const page of markedPdfPages) {
+    const pngImage = await pdfDoc.embedPng(page)
+    const p = pdfDoc.addPage([pngImage.width, pngImage.height])
+    p.drawImage(pngImage, {
+      x: 0,
+      y: 0,
+      width: pngImage.width,
+      height: pngImage.height
+    })
+  }
+
+  const pdfBytes = await pdfDoc.save()
+  return new Blob([pdfBytes], { type: 'application/pdf' })
+}
+
+/**
+ * Takes an ArrayBuffer of a PDF file and converts to Sigit's Internal Pdf File type
+ * @param arrayBuffer
+ * @param fileName
+ */
+const convertToPdfFile = async (
+  arrayBuffer: ArrayBuffer,
+  fileName: string
+): Promise<PdfFile> => {
+  const file = toFile(arrayBuffer, fileName)
+  return toPdfFile(file)
+}
+
+/**
+ * @param marks - an array of Marks
+ * @function hasValue removes any Mark without a property
+ * @function scaleMark scales remaining marks in line with SCALE
+ * @function byPage groups remaining Marks by their page marks.location.page
+ */
+const groupMarksByPage = (marks: Mark[]) => {
+  return marks
+    .filter(hasValue)
+    .map(scaleMark)
+    .reduce<{ [key: number]: Mark[] }>(byPage, {})
+}
+
+/**
+ * A reducer callback that transforms an array of marks into an object grouped by the page number
+ * Can be replaced by Object.groupBy https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/groupBy
+ * when it is implemented in TypeScript
+ * Implementation is standard from the Array.prototype.reduce documentation
+ * @param obj - accumulator in the reducer callback
+ * @param mark - current value, i.e. Mark being examined
+ */
+const byPage = (obj: { [key: number]: Mark[] }, mark: Mark) => {
+  const key = mark.location.page
+  const curGroup = obj[key] ?? []
+  return { ...obj, [key]: [...curGroup, mark] }
+}
+
+export {
+  toFile,
+  toPdfFile,
+  toPdfFiles,
+  inPx,
+  convertToPdfFile,
+  addMarks,
+  convertToPdfBlob,
+  groupMarksByPage
+}

src/utils/relays.ts

@@ -0,0 +1,116 @@
+import { Filter, SimplePool } from 'nostr-tools'
+import { RelayList } from 'nostr-tools/kinds'
+import { Event } from 'nostr-tools'
+import { localCache } from '../services'
+import { ONE_WEEK_IN_MS, SIGIT_RELAY } from './const.ts'
+import { RelayMap, RelaySet } from '../types'
+
+const READ_MARKER = 'read'
+const WRITE_MARKER = 'write'
+
+/**
+ * Attempts to find a relay list from the provided lookUpRelays.
+ * If the relay list is found, it will be added to the user relay list metadata.
+ * @param lookUpRelays
+ * @param hexKey
+ * @return found relay list or null
+ */
+const findRelayListAndUpdateCache = async (
+  lookUpRelays: string[],
+  hexKey: string
+): Promise<Event | null> => {
+  try {
+    const eventFilter: Filter = {
+      kinds: [RelayList],
+      authors: [hexKey]
+    }
+    const pool = new SimplePool()
+    const event = await pool.get(lookUpRelays, eventFilter)
+    if (event) {
+      await localCache.addUserRelayListMetadata(event)
+    }
+    return event
+  } catch (error) {
+    console.error(error)
+    return null
+  }
+}
+
+/**
+ * Attempts to find a relay list in cache. If it is present, it will check that the cached event is not
+ * older than one week.
+ * @param hexKey
+ * @return RelayList event if it's not older than a week; otherwise null
+ */
+const findRelayListInCache = async (hexKey: string): Promise<Event | null> => {
+  try {
+    // Attempt to retrieve the metadata event from the local cache
+    const cachedRelayListMetadataEvent =
+      await localCache.getUserRelayListMetadata(hexKey)
+
+    // Check if the cached event is not older than one week
+    if (
+      cachedRelayListMetadataEvent &&
+      isOlderThanOneWeek(cachedRelayListMetadataEvent.cachedAt)
+    ) {
+      return cachedRelayListMetadataEvent.event
+    }
+
+    return null
+  } catch (error) {
+    console.error(error)
+    return null
+  }
+}
+
+/**
+ * Transforms a list of relay tags from a Nostr Event to a RelaySet.
+ * @param tags
+ */
+const getUserRelaySet = (tags: string[][]): RelaySet => {
+  return tags
+    .filter(isRelayTag)
+    .reduce<RelaySet>(toRelaySet, getDefaultRelaySet())
+}
+
+const getDefaultRelaySet = (): RelaySet => ({
+  read: [SIGIT_RELAY],
+  write: [SIGIT_RELAY]
+})
+
+const getDefaultRelayMap = (): RelayMap => ({
+  [SIGIT_RELAY]: { write: true, read: true }
+})
+
+const isOlderThanOneWeek = (cachedAt: number) => {
+  return Date.now() - cachedAt < ONE_WEEK_IN_MS
+}
+
+const isRelayTag = (tag: string[]): boolean => tag[0] === 'r'
+
+const toRelaySet = (obj: RelaySet, tag: string[]): RelaySet => {
+  if (tag.length >= 3) {
+    const marker = tag[2]
+
+    if (marker === READ_MARKER) {
+      obj.read.push(tag[1])
+    } else if (marker === WRITE_MARKER) {
+      obj.write.push(tag[1])
+    }
+  }
+  if (tag.length === 2) {
+    obj.read.push(tag[1])
+    obj.write.push(tag[1])
+  }
+
+  return obj
+}
+
+export {
+  findRelayListAndUpdateCache,
+  findRelayListInCache,
+  getUserRelaySet,
+  getDefaultRelaySet,
+  getDefaultRelayMap,
+  isOlderThanOneWeek
+}

src/utils/sign.ts

@@ -0,0 +1,34 @@
+import { Event } from 'nostr-tools'
+import { Meta } from '../types'
+
+/**
+ * This function returns the signature of last signer
+ * It will be used in the content of export signature's signedEvent
+ */
+const getLastSignersSig = (
+  meta: Meta,
+  signers: `npub1${string}`[]
+): string | null => {
+  // if there're no signers then use creator's signature
+  if (signers.length === 0) {
+    try {
+      const createSignatureEvent: Event = JSON.parse(meta.createSignature)
+      return createSignatureEvent.sig
+    } catch (error) {
+      return null
+    }
+  }
+
+  // get last signer
+  const lastSigner = signers[signers.length - 1]
+
+  // get the signature of last signer
+  try {
+    const lastSignatureEvent: Event = JSON.parse(meta.docSignatures[lastSigner])
+    return lastSignatureEvent.sig
+  } catch (error) {
+    return null
+  }
+}
+
+export { getLastSignersSig }

src/utils/utils.ts

@@ -1,3 +1,5 @@
+import { PdfFile } from '../types/drawing.ts'
+
 export const compareObjects = (
   obj1: object | null | undefined,
   obj2: object | null | undefined
@@ -64,3 +66,17 @@ export const timeout = (ms: number = 60000) => {
     }, ms) // Timeout duration in milliseconds
   })
 }
+/**
+ * Creates a flat array where each object contains all required information about a Pdf File,
+ * including its name, hash, and content
+ * @param files
+ * @param fileHashes
+ */
+export const getFilesWithHashes = (
+  files: { [filename: string]: PdfFile },
+  fileHashes: { [key: string]: string | null }
+) => {
+  return Object.entries(files).map(([filename, pdfFile]) => {
+    return { pdfFile, filename, hash: fileHashes[filename] }
+  })
+}

src/utils/zip.ts

@@ -1,6 +1,6 @@
 import JSZip from 'jszip'
 import { toast } from 'react-toastify'
-import { OutputByType, OutputType } from '../types'
+import { InputFileFormat, OutputByType, OutputType } from '../types'
 
 /**
  * Read the content of a file within a zip archive.
@@ -9,7 +9,7 @@ import { OutputByType, OutputType } from '../types'
  * @param outputType The type of output to return (e.g., 'string', 'arraybuffer', 'uint8array', etc.).
  * @returns A Promise resolving to the content of the file, or null if an error occurs.
  */
-export const readContentOfZipEntry = async <T extends OutputType>(
+const readContentOfZipEntry = async <T extends OutputType>(
   zip: JSZip,
   filePath: string,
   outputType: T
@@ -22,8 +22,9 @@ export const readContentOfZipEntry = async <T extends OutputType>(
     return null
   }
 
-  // Read the content of the zip entry asynchronously
-  const fileContent = await zipEntry.async(outputType).catch((err) => {
+  // Read and return the content of the zip entry asynchronously
+  // or null if an error has occurred
+  return await zipEntry.async(outputType).catch((err) => {
     // Handle any errors that occur during the read operation
     console.log(`Error reading content of ${filePath}:`, err)
     toast.error(
@@ -31,7 +32,16 @@ export const readContentOfZipEntry = async <T extends OutputType>(
     )
     return null
   })
-
-  // Return the file content or null if an error occurred
-  return fileContent
 }
+
+const loadZip = async (data: InputFileFormat): Promise<JSZip | null> => {
+  try {
+    return await JSZip.loadAsync(data)
+  } catch (err: any) {
+    console.log('err in loading zip file :>> ', err)
+    toast.error(err.message || 'An error occurred in loading zip file.')
+    return null
+  }
+}
+
+export { readContentOfZipEntry, loadZip }