refactor(signature): apply strategy pattern and make it easier to expand with new tools

src/components/MarkFormField/index.tsx

@@ -7,7 +7,7 @@ import {
   isCurrentValueLast
 } from '../../utils'
 import React, { useState } from 'react'
-import { MARK_TYPE_CONFIG } from '../getMarkComponents.tsx'
+import { MarkInput } from '../MarkTypeStrategy/MarkInput.tsx'
 
 interface MarkFormFieldProps {
   currentUserMarks: CurrentUserMark[]
@@ -52,8 +52,7 @@ const MarkFormField = ({
   }
   const toggleActions = () => setDisplayActions(!displayActions)
   const markLabel = getToolboxLabelByMarkType(selectedMark.mark.type)
-  const { input: MarkInputComponent } =
+
-    MARK_TYPE_CONFIG[selectedMark.mark.type] || {}
   return (
     <div className={styles.container}>
       <div className={styles.trigger}>
@@ -84,15 +83,14 @@ const MarkFormField = ({
           </div>
           <div className={styles.inputWrapper}>
             <form onSubmit={(e) => handleFormSubmit(e)}>
-              {typeof MarkInputComponent !== 'undefined' && (
+              <MarkInput
-                <MarkInputComponent
+                markType={selectedMark.mark.type}
-                  key={selectedMark.id}
+                key={selectedMark.id}
-                  value={selectedMarkValue}
+                value={selectedMarkValue}
-                  placeholder={markLabel}
+                placeholder={markLabel}
-                  handler={handleSelectedMarkValueChange}
+                handler={handleSelectedMarkValueChange}
-                  userMark={selectedMark}
+                userMark={selectedMark}
-                />
+              />
-              )}
               <div className={styles.actionsBottom}>
                 <button type="submit" className={styles.submitButton}>
                   NEXT

src/components/MarkTypeStrategy/MarkInput.tsx

@@ -0,0 +1,16 @@
+import { MarkType } from '../../types/drawing'
+import { MARK_TYPE_CONFIG, MarkInputProps } from './MarkStrategy'
+
+interface MarkInputComponentProps extends MarkInputProps {
+  markType: MarkType
+}
+
+export const MarkInput = ({ markType, ...rest }: MarkInputComponentProps) => {
+  const { input: InputComponent } = MARK_TYPE_CONFIG[markType] || {}
+
+  if (typeof InputComponent !== 'undefined') {
+    return <InputComponent {...rest} />
+  }
+
+  return null
+}

src/components/MarkTypeStrategy/MarkRender.tsx

@@ -0,0 +1,20 @@
+import { MarkType } from '../../types/drawing'
+import { MARK_TYPE_CONFIG, MarkRenderProps } from './MarkStrategy'
+
+interface MarkRenderComponentProps extends MarkRenderProps {
+  markType: MarkType
+}
+
+export const MarkRender = ({ markType, ...rest }: MarkRenderComponentProps) => {
+  const { render: RenderComponent } = MARK_TYPE_CONFIG[markType] || {}
+
+  if (typeof RenderComponent !== 'undefined') {
+    return <RenderComponent {...rest} />
+  }
+
+  return <DefaultRenderComponent {...rest} />
+}
+
+const DefaultRenderComponent = ({ value }: MarkRenderProps) => (
+  <span>{value}</span>
+)

src/components/MarkTypeStrategy/MarkStrategy.tsx

@@ -0,0 +1,32 @@
+import { MarkType } from '../../types/drawing'
+import { CurrentUserMark, Mark } from '../../types/mark'
+import { TextStrategy } from './Text'
+import { SignatureStrategy } from './Signature'
+
+export interface MarkInputProps {
+  value: string
+  handler: (value: string) => void
+  placeholder?: string
+  userMark?: CurrentUserMark
+}
+
+export interface MarkRenderProps {
+  value?: string
+  mark: Mark
+}
+
+export interface MarkStrategy {
+  input: React.FC<MarkInputProps>
+  render: React.FC<MarkRenderProps>
+  encryptAndUpload?: (value: string, key?: string) => Promise<string>
+  fetchAndDecrypt?: (value: string, key?: string) => Promise<string>
+}
+
+export type MarkStrategies = {
+  [key in MarkType]?: MarkStrategy
+}
+
+export const MARK_TYPE_CONFIG: MarkStrategies = {
+  [MarkType.TEXT]: TextStrategy,
+  [MarkType.SIGNATURE]: SignatureStrategy
+}

src/components/MarkTypeStrategy/Signature/Input.module.scss

@@ -1,4 +1,4 @@
-@import '../../styles/colors.scss';
+@import '../../../styles/colors.scss';
 
 $padding: 5px;
 

src/components/MarkTypeStrategy/Signature/Input.tsx

@@ -1,12 +1,12 @@
 import { useCallback, useEffect, useRef } from 'react'
-import { MarkInputProps } from '../../types/mark'
 import { faEraser } from '@fortawesome/free-solid-svg-icons'
 import { FontAwesomeIcon } from '@fortawesome/react-fontawesome'
-import styles from './Signature.module.scss'
+import { MarkRenderSignature } from './Render'
-import { MarkRenderSignature } from '../MarkRender/Signature'
 import SignaturePad from 'signature_pad'
-import { SIGNATURE_PAD_OPTIONS, SIGNATURE_PAD_SIZE } from '../../utils/const'
+import { SIGNATURE_PAD_OPTIONS, SIGNATURE_PAD_SIZE } from '../../../utils/const'
 import { BasicPoint } from 'signature_pad/dist/types/point'
+import { MarkInputProps } from '../MarkStrategy'
+import styles from './Input.module.scss'
 
 export const MarkInputSignature = ({
   value,

src/components/MarkTypeStrategy/Signature/Render.tsx

@@ -1,9 +1,9 @@
 import { useEffect, useState } from 'react'
 import SignaturePad from 'signature_pad'
-import { MarkRenderProps } from '../../types/mark'
+import { SIGNATURE_PAD_OPTIONS, SIGNATURE_PAD_SIZE } from '../../../utils'
-import { SIGNATURE_PAD_OPTIONS, SIGNATURE_PAD_SIZE } from '../../utils'
 import { BasicPoint } from 'signature_pad/dist/types/point'
-import styles from './Signature.module.scss'
+import { MarkRenderProps } from '../MarkStrategy'
+import styles from './Render.module.scss'
 
 export const MarkRenderSignature = ({ value }: MarkRenderProps) => {
   const [dataUrl, setDataUrl] = useState<string | undefined>()

src/components/MarkTypeStrategy/Signature/index.tsx

@@ -0,0 +1,86 @@
+import axios from 'axios'
+import {
+  decryptArrayBuffer,
+  encryptArrayBuffer,
+  getHash,
+  isOnline,
+  uploadToFileStorage
+} from '../../../utils'
+import { MarkStrategy } from '../MarkStrategy'
+import { MarkInputSignature } from './Input'
+import { MarkRenderSignature } from './Render'
+
+export const SignatureStrategy: MarkStrategy = {
+  input: MarkInputSignature,
+  render: MarkRenderSignature,
+  encryptAndUpload: async (value, encryptionKey) => {
+    // Value is the stringified signature object
+    // Encode it as text to the arrayBuffer
+    const encoder = new TextEncoder()
+    const uint8Array = encoder.encode(value)
+    const hash = await getHash(uint8Array)
+
+    if (!hash) {
+      throw new Error("Can't get file hash.")
+    }
+
+    if (!encryptionKey) {
+      throw new Error('Signature requires an encryption key')
+    }
+
+    // Encrypt the file contents with the same encryption key from the create signature
+    const encryptedArrayBuffer = await encryptArrayBuffer(
+      uint8Array,
+      encryptionKey
+    )
+
+    // Create the encrypted json file from array buffer and hash
+    const file = new File([encryptedArrayBuffer], `${hash}.json`)
+
+    if (await isOnline()) {
+      try {
+        const url = await uploadToFileStorage(file)
+        console.info(`${file.name} uploaded to file storage`)
+        return url
+      } catch (error) {
+        if (error instanceof Error) {
+          console.error(
+            `Error occurred in uploading file ${file.name}`,
+            error.message
+          )
+        }
+      }
+    } else {
+      // Handle offline?
+    }
+
+    return value
+  },
+  fetchAndDecrypt: async (value, encryptionKey) => {
+    if (!encryptionKey) {
+      throw new Error('Signature requires an encryption key')
+    }
+
+    const encryptedArrayBuffer = await axios.get(value, {
+      responseType: 'arraybuffer'
+    })
+
+    const arrayBuffer = await decryptArrayBuffer(
+      encryptedArrayBuffer.data,
+      encryptionKey
+    ).catch((err) => {
+      console.log('err in decryption:>> ', err)
+      return null
+    })
+
+    if (arrayBuffer) {
+      // decode json
+      const decoder = new TextDecoder()
+      const value = decoder.decode(arrayBuffer)
+      return value
+    }
+
+    // Handle offline?
+    return value
+  }
+}

src/components/MarkTypeStrategy/Text/Input.tsx

@@ -1,5 +1,5 @@
-import { MarkInputProps } from '../../types/mark'
+import { MarkInputProps } from '../MarkStrategy'
-import styles from '../MarkFormField/style.module.scss'
+import styles from '../../MarkFormField/style.module.scss'
 
 export const MarkInputText = ({
   value,

src/components/MarkTypeStrategy/Text/index.tsx

@@ -0,0 +1,7 @@
+import { MarkStrategy } from '../MarkStrategy'
+import { MarkInputText } from './Input'
+
+export const TextStrategy: MarkStrategy = {
+  input: MarkInputText,
+  render: ({ value }) => <>{value}</>
+}

src/components/PDFView/PdfMarkItem.tsx

@@ -4,7 +4,7 @@ import { FONT_SIZE, FONT_TYPE, inPx } from '../../utils/pdf.ts'
 import { useScale } from '../../hooks/useScale.tsx'
 import { forwardRef } from 'react'
 import { npubToHex } from '../../utils/nostr.ts'
-import { MARK_TYPE_CONFIG } from '../getMarkComponents.tsx'
+import { MarkRender } from '../MarkTypeStrategy/MarkRender.tsx'
 
 interface PdfMarkItemProps {
   userMark: CurrentUserMark
@@ -28,8 +28,6 @@ const PdfMarkItem = forwardRef<HTMLDivElement, PdfMarkItemProps>(
     const getMarkValue = () =>
       isEdited() ? selectedMarkValue : userMark.currentValue
     const { from } = useScale()
-    const { render: MarkRenderComponent } =
-      MARK_TYPE_CONFIG[userMark.mark.type] || {}
     return (
       <div
         ref={ref}
@@ -50,13 +48,12 @@ const PdfMarkItem = forwardRef<HTMLDivElement, PdfMarkItemProps>(
           fontSize: inPx(from(pageWidth, FONT_SIZE))
         }}
       >
-        {typeof MarkRenderComponent !== 'undefined' && (
+        <MarkRender
-          <MarkRenderComponent
+          key={getMarkValue()}
-            key={getMarkValue()}
+          markType={userMark.mark.type}
-            value={getMarkValue()}
+          value={getMarkValue()}
-            mark={userMark.mark}
+          mark={userMark.mark}
-          />
+        />
-        )}
       </div>
     )
   }

src/components/PDFView/PdfPageItem.tsx

@@ -6,7 +6,7 @@ import { useEffect, useRef } from 'react'
 import pdfViewStyles from './style.module.scss'
 import { FONT_SIZE, FONT_TYPE, inPx } from '../../utils/pdf.ts'
 import { useScale } from '../../hooks/useScale.tsx'
-import { MARK_TYPE_CONFIG } from '../getMarkComponents.tsx'
+import { MarkRender } from '../MarkTypeStrategy/MarkRender.tsx'
 interface PdfPageProps {
   fileName: string
   pageIndex: number
@@ -61,7 +61,6 @@ const PdfPageItem = ({
         />
       ))}
       {otherUserMarks.map((m, i) => {
-        const { render: MarkRenderComponent } = MARK_TYPE_CONFIG[m.type] || {}
         return (
           <div
             key={i}
@@ -75,9 +74,7 @@ const PdfPageItem = ({
               fontSize: inPx(from(page.width, FONT_SIZE))
             }}
           >
-            {typeof MarkRenderComponent !== 'undefined' && (
+            <MarkRender value={m.value} mark={m} markType={m.type} />
-              <MarkRenderComponent value={m.value} mark={m} />
-            )}
           </div>
         )
       })}

src/components/getMarkComponents.tsx

@@ -1,92 +0,0 @@
-import { toast } from 'react-toastify'
-import { MarkType } from '../types/drawing'
-import { MarkConfigs } from '../types/mark'
-import {
-  decryptArrayBuffer,
-  encryptArrayBuffer,
-  getHash,
-  isOnline,
-  uploadToFileStorage
-} from '../utils'
-import { MarkInputSignature } from './MarkInputs/Signature'
-import { MarkInputText } from './MarkInputs/Text'
-import { MarkRenderSignature } from './MarkRender/Signature'
-import axios from 'axios'
-
-export const MARK_TYPE_CONFIG: MarkConfigs = {
-  [MarkType.TEXT]: {
-    input: MarkInputText,
-    render: ({ value }) => <>{value}</>
-  },
-  [MarkType.SIGNATURE]: {
-    input: MarkInputSignature,
-    render: MarkRenderSignature,
-    encryptAndUpload: async (value, encryptionKey) => {
-      // Value is the stringified signature object
-      // Encode it as text to the arrayBuffer
-      const encoder = new TextEncoder()
-      const uint8Array = encoder.encode(value)
-      const hash = await getHash(uint8Array)
-
-      if (!hash) {
-        throw new Error("Can't get file hash.")
-      }
-
-      if (!encryptionKey) {
-        throw new Error('Signature requires an encryption key')
-      }
-
-      // Encrypt the file contents with the same encryption key from the create signature
-      const encryptedArrayBuffer = await encryptArrayBuffer(
-        uint8Array,
-        encryptionKey
-      )
-
-      // Create the encrypted json file from array buffer and hash
-      const file = new File([encryptedArrayBuffer], `${hash}.json`)
-
-      if (await isOnline()) {
-        try {
-          const url = await uploadToFileStorage(file)
-          toast.success('files.zip uploaded to file storage')
-          return url
-        } catch (error) {
-          if (error instanceof Error) {
-            toast.error(error.message || 'Error occurred in uploading file')
-          }
-        }
-      } else {
-        // Handle offline?
-      }
-
-      return value
-    },
-    fetchAndDecrypt: async (value, encryptionKey) => {
-      if (!encryptionKey) {
-        throw new Error('Signature requires an encryption key')
-      }
-
-      const encryptedArrayBuffer = await axios.get(value, {
-        responseType: 'arraybuffer'
-      })
-
-      const arrayBuffer = await decryptArrayBuffer(
-        encryptedArrayBuffer.data,
-        encryptionKey
-      ).catch((err) => {
-        console.log('err in decryption:>> ', err)
-        return null
-      })
-
-      if (arrayBuffer) {
-        // decode json
-        const decoder = new TextDecoder()
-        const value = decoder.decode(arrayBuffer)
-        return value
-      }
-
-      // Handle offline?
-      return value
-    }
-  }
-}

src/hooks/useSigitMeta.tsx

@@ -21,7 +21,7 @@ import { Event } from 'nostr-tools'
 import store from '../store/store'
 import { NostrController } from '../controllers'
 import { MetaParseError } from '../types/errors/MetaParseError'
-import { MARK_TYPE_CONFIG } from '../components/getMarkComponents'
+import { MARK_TYPE_CONFIG } from '../components/MarkTypeStrategy/MarkStrategy'
 
 /**
  * Flattened interface that combines properties `Meta`, `CreateSignatureEventContent`,

src/pages/sign/index.tsx

@@ -55,7 +55,7 @@ import {
 } from '../../utils/file.ts'
 import { ARRAY_BUFFER, DEFLATE } from '../../utils/const.ts'
 import { generateTimestamp } from '../../utils/opentimestamps.ts'
-import { MARK_TYPE_CONFIG } from '../../components/getMarkComponents.tsx'
+import { MARK_TYPE_CONFIG } from '../../components/MarkTypeStrategy/MarkStrategy.tsx'
 
 enum SignedStatus {
   Fully_Signed,

src/pages/verify/index.tsx

@@ -55,7 +55,7 @@ import {
 } from '@fortawesome/free-solid-svg-icons'
 import { upgradeAndVerifyTimestamp } from '../../utils/opentimestamps.ts'
 import _ from 'lodash'
-import { MARK_TYPE_CONFIG } from '../../components/getMarkComponents.tsx'
+import { MarkRender } from '../../components/MarkTypeStrategy/MarkRender.tsx'
 
 interface PdfViewProps {
   files: CurrentUserFile[]
@@ -115,8 +115,6 @@ const SlimPdfView = ({
                           alt={`page ${i} of ${file.name}`}
                         />
                         {marks.map((m) => {
-                          const { render: MarkRenderComponent } =
-                            MARK_TYPE_CONFIG[m.type] || {}
                           return (
                             <div
                               className={`file-mark ${styles.mark}`}
@@ -132,9 +130,11 @@ const SlimPdfView = ({
                                 fontSize: inPx(from(page.width, FONT_SIZE))
                               }}
                             >
-                              {typeof MarkRenderComponent !== 'undefined' && (
+                              <MarkRender
-                                <MarkRenderComponent value={m.value} mark={m} />
+                                markType={m.type}
-                              )}
+                                value={m.value}
+                                mark={m}
+                              />
                             </div>
                           )
                         })}

src/types/mark.ts

@@ -28,26 +28,3 @@ export interface MarkRect {
   width: number
   height: number
 }
-
-export interface MarkInputProps {
-  value: string
-  handler: (value: string) => void
-  placeholder?: string
-  userMark?: CurrentUserMark
-}
-
-export interface MarkRenderProps {
-  value?: string
-  mark: Mark
-}
-
-export interface MarkConfig {
-  input: React.FC<MarkInputProps>
-  render: React.FC<MarkRenderProps>
-  encryptAndUpload?: (value: string, key?: string) => Promise<string>
-  fetchAndDecrypt?: (value: string, key?: string) => Promise<string>
-}
-
-export type MarkConfigs = {
-  [key in MarkType]?: MarkConfig
-}

src/utils/file.ts

@@ -1,4 +1,4 @@
-import { MARK_TYPE_CONFIG } from '../components/getMarkComponents.tsx'
+import { MARK_TYPE_CONFIG } from '../components/MarkTypeStrategy/MarkStrategy.tsx'
 import { NostrController } from '../controllers/NostrController.ts'
 import store from '../store/store.ts'
 import { Meta } from '../types'

src/utils/mark.ts

@@ -24,7 +24,7 @@ import {
   faStamp,
   faTableCellsLarge
 } from '@fortawesome/free-solid-svg-icons'
-import { MARK_TYPE_CONFIG } from '../components/getMarkComponents.tsx'
+import { MARK_TYPE_CONFIG } from '../components/MarkTypeStrategy/MarkStrategy.tsx'
 
 /**
  * Takes in an array of Marks already filtered by User.