src/components/DisplaySigit/index.tsx

@@ -1,6 +1,6 @@
-import { Dispatch, SetStateAction, useEffect } from 'react'
+import { useEffect, useState } from 'react'
 import { Meta, ProfileMetadata } from '../../types'
-import { SigitInfo, SignedStatus } from '../../hooks/useSigitMeta'
+import { SigitCardDisplayInfo, SigitStatus } from '../../utils'
 import { Event, kinds } from 'nostr-tools'
 import { Link } from 'react-router-dom'
 import { MetadataController } from '../../controllers'
@@ -25,17 +25,10 @@ import { getExtensionIconLabel } from '../getExtensionIconLabel'
 
 type SigitProps = {
   meta: Meta
-  parsedMeta: SigitInfo
+  parsedMeta: SigitCardDisplayInfo
-  profiles: { [key: string]: ProfileMetadata }
-  setProfiles: Dispatch<SetStateAction<{ [key: string]: ProfileMetadata }>>
 }
 
-export const DisplaySigit = ({
+export const DisplaySigit = ({ meta, parsedMeta }: SigitProps) => {
-  meta,
-  parsedMeta,
-  profiles,
-  setProfiles
-}: SigitProps) => {
   const {
     title,
     createdAt,
@@ -45,51 +38,67 @@ export const DisplaySigit = ({
     fileExtensions
   } = parsedMeta
 
+  const [profiles, setProfiles] = useState<{ [key: string]: ProfileMetadata }>(
+    {}
+  )
+
   useEffect(() => {
-    const hexKeys: string[] = []
+    const hexKeys = new Set<string>([
+      ...signers.map((signer) => npubToHex(signer)!)
+    ])
 
     if (submittedBy) {
-      hexKeys.push(npubToHex(submittedBy)!)
+      hexKeys.add(npubToHex(submittedBy)!)
     }
-    hexKeys.push(...signers.map((signer) => npubToHex(signer)!))
 
     const metadataController = new MetadataController()
-    hexKeys.forEach((key) => {
+
-      if (!(key in profiles)) {
+    const handleMetadataEvent = (key: string) => (event: Event) => {
-        const handleMetadataEvent = (event: Event) => {
       const metadataContent =
         metadataController.extractProfileMetadataContent(event)
 
-          if (metadataContent)
+      if (metadataContent) {
         setProfiles((prev) => ({
           ...prev,
           [key]: metadataContent
         }))
       }
-
-        metadataController.on(key, (kind: number, event: Event) => {
-          if (kind === kinds.Metadata) {
-            handleMetadataEvent(event)
     }
-        })
+
+    const handleEventListener =
+      (key: string) => (kind: number, event: Event) => {
+        if (kind === kinds.Metadata) {
+          handleMetadataEvent(key)(event)
+        }
+      }
+
+    hexKeys.forEach((key) => {
+      if (!(key in profiles)) {
+        metadataController.on(key, handleEventListener(key))
 
         metadataController
           .findMetadata(key)
           .then((metadataEvent) => {
-            if (metadataEvent) handleMetadataEvent(metadataEvent)
+            if (metadataEvent) handleMetadataEvent(key)(metadataEvent)
           })
           .catch((err) => {
             console.error(`error occurred in finding metadata for: ${key}`, err)
           })
       }
     })
-  }, [submittedBy, signers, profiles, setProfiles])
+
+    return () => {
+      hexKeys.forEach((key) => {
+        metadataController.off(key, handleEventListener(key))
+      })
+    }
+  }, [submittedBy, signers, profiles])
 
   return (
     <div className={styles.itemWrapper}>
       <Link
         to={
-          signedStatus === SignedStatus.Complete
+          signedStatus === SigitStatus.Complete
             ? appPublicRoutes.verify
             : appPrivateRoutes.sign
         }

src/components/DisplaySigner/index.tsx

@@ -28,6 +28,8 @@ export const DisplaySigner = ({
   const [signStatus, setSignedStatus] = useState<SignStatus>()
 
   useEffect(() => {
+    if (!meta) return
+
     const updateSignStatus = async () => {
       const npub = hexToNpub(pubkey)
       if (npub in meta.docSignatures) {

src/hooks/useSigitMeta.tsx

@@ -1,117 +1,147 @@
 import { useEffect, useState } from 'react'
-import { toast } from 'react-toastify'
 import { CreateSignatureEventContent, Meta } from '../types'
-import { parseJson } from '../utils'
+import { Mark } from '../types/mark'
+import {
+  parseCreateSignatureEvent,
+  parseCreateSignatureEventContent,
+  SigitMetaParseError,
+  SigitStatus,
+  SignStatus
+} from '../utils'
+import { toast } from 'react-toastify'
+import { verifyEvent } from 'nostr-tools'
 import { Event } from 'nostr-tools'
 
-type npub = `npub1${string}`
+interface FlatMeta extends Meta, CreateSignatureEventContent, Partial<Event> {
+  // Validated create signature event
+  isValid: boolean
 
-export enum SignedStatus {
+  // Calculated status fields
-  Partial = 'In-Progress',
+  signedStatus: SigitStatus
-  Complete = 'Completed'
+  signersStatus: {
+    [signer: `npub1${string}`]: SignStatus
+  }
 }
 
-export interface SigitInfo {
+/**
-  createdAt?: number
+ * Custom use hook for parsing the Sigit Meta
-  title?: string
+ * @param meta Sigit Meta
-  submittedBy?: string
+ * @returns flattened Meta object with calculated signed status
-  signers: npub[]
+ */
-  fileExtensions: string[]
+export const useSigitMeta = (meta: Meta): FlatMeta => {
-  signedStatus: SignedStatus
+  const [isValid, setIsValid] = useState(false)
-}
+  const [kind, setKind] = useState<number>()
+  const [tags, setTags] = useState<string[][]>()
+  const [created_at, setCreatedAt] = useState<number>()
+  const [pubkey, setPubkey] = useState<string>() // submittedBy, pubkey from nostr event
+  const [id, setId] = useState<string>()
+  const [sig, setSig] = useState<string>()
 
-export const extractSigitInfo = async (meta: Meta) => {
+  const [signers, setSigners] = useState<`npub1${string}`[]>([])
-  if (!meta?.createSignature) return
+  const [viewers, setViewers] = useState<`npub1${string}`[]>([])
+  const [fileHashes, setFileHashes] = useState<{
+    [user: `npub1${string}`]: string
+  }>({})
+  const [markConfig, setMarkConfig] = useState<Mark[]>([])
+  const [title, setTitle] = useState<string>('')
+  const [zipUrl, setZipUrl] = useState<string>('')
 
-  const sigitInfo: SigitInfo = {
+  const [signedStatus, setSignedStatus] = useState<SigitStatus>(
-    signers: [],
+    SigitStatus.Partial
-    fileExtensions: [],
-    signedStatus: SignedStatus.Partial
-  }
-
-  const createSignatureEvent = await parseJson<Event>(
-    meta.createSignature
-  ).catch((err) => {
-    console.log('err in parsing the createSignature event:>> ', err)
-    toast.error(
-      err.message || 'error occurred in parsing the create signature event'
   )
-    return
+  const [signersStatus, setSignersStatus] = useState<{
-  })
+    [signer: `npub1${string}`]: SignStatus
-
+  }>({})
-  if (!createSignatureEvent) return
-
-  // created_at in nostr events are stored in seconds
-  sigitInfo.createdAt = createSignatureEvent.created_at * 1000
-
-  const createSignatureContent = await parseJson<CreateSignatureEventContent>(
-    createSignatureEvent.content
-  ).catch((err) => {
-    console.log(`err in parsing the createSignature event's content :>> `, err)
-    return
-  })
-
-  if (!createSignatureContent) return
-
-  const files = Object.keys(createSignatureContent.fileHashes)
-  const extensions = files.reduce((result: string[], file: string) => {
-    const extension = file.split('.').pop()
-    if (extension) {
-      result.push(extension)
-    }
-    return result
-  }, [])
-
-  const signedBy = Object.keys(meta.docSignatures) as npub[]
-  const isCompletelySigned = createSignatureContent.signers.every((signer) =>
-    signedBy.includes(signer)
-  )
-
-  sigitInfo.title = createSignatureContent.title
-  sigitInfo.submittedBy = createSignatureEvent.pubkey
-  sigitInfo.signers = createSignatureContent.signers
-  sigitInfo.fileExtensions = extensions
-
-  if (isCompletelySigned) {
-    sigitInfo.signedStatus = SignedStatus.Complete
-  }
-
-  return sigitInfo
-}
-
-export const useSigitMeta = (meta: Meta) => {
-  const [title, setTitle] = useState<string>()
-  const [createdAt, setCreatedAt] = useState<number>()
-  const [submittedBy, setSubmittedBy] = useState<string>()
-  const [signers, setSigners] = useState<npub[]>([])
-  const [signedStatus, setSignedStatus] = useState<SignedStatus>(
-    SignedStatus.Partial
-  )
-  const [fileExtensions, setFileExtensions] = useState<string[]>([])
 
   useEffect(() => {
-    const getSigitInfo = async () => {
+    if (!meta) return
-      const sigitInfo = await extractSigitInfo(meta)
+    ;(async function () {
+      try {
+        const createSignatureEvent = await parseCreateSignatureEvent(
+          meta.createSignature
+        )
 
-      if (!sigitInfo) return
+        const { kind, tags, created_at, pubkey, id, sig, content } =
+          createSignatureEvent
 
-      setTitle(sigitInfo.title)
+        setIsValid(verifyEvent(createSignatureEvent))
-      setCreatedAt(sigitInfo.createdAt)
+        setKind(kind)
-      setSubmittedBy(sigitInfo.submittedBy)
+        setTags(tags)
-      setSigners(sigitInfo.signers)
+        // created_at in nostr events are stored in seconds
-      setSignedStatus(sigitInfo.signedStatus)
+        setCreatedAt(created_at * 1000)
-      setFileExtensions(sigitInfo.fileExtensions)
+        setPubkey(pubkey)
+        setId(id)
+        setSig(sig)
+
+        const { title, signers, viewers, fileHashes, markConfig, zipUrl } =
+          await parseCreateSignatureEventContent(content)
+
+        setTitle(title)
+        setSigners(signers)
+        setViewers(viewers)
+        setFileHashes(fileHashes)
+        setMarkConfig(markConfig)
+        setZipUrl(zipUrl)
+
+        // Parse each signature event and set signer status
+        for (const npub in meta.docSignatures) {
+          try {
+            const event = await parseCreateSignatureEvent(
+              meta.docSignatures[npub as `npub1${string}`]
+            )
+            const isValidSignature = verifyEvent(event)
+            setSignersStatus((prev) => {
+              return {
+                ...prev,
+                [npub]: isValidSignature
+                  ? SignStatus.Signed
+                  : SignStatus.Invalid
               }
-
+            })
-    getSigitInfo()
+          } catch (error) {
+            setSignersStatus((prev) => {
+              return {
+                ...prev,
+                [npub]: SignStatus.Invalid
+              }
+            })
+          }
+        }
+        const signedBy = Object.keys(meta.docSignatures) as `npub1${string}`[]
+        const isCompletelySigned = signers.every((signer) =>
+          signedBy.includes(signer)
+        )
+        setSignedStatus(
+          isCompletelySigned ? SigitStatus.Complete : SigitStatus.Partial
+        )
+      } catch (error) {
+        if (error instanceof SigitMetaParseError) {
+          toast.error(error.message)
+        }
+        console.error(error)
+      }
+    })()
   }, [meta])
 
   return {
-    title,
+    modifiedAt: meta.modifiedAt,
-    createdAt,
+    createSignature: meta.createSignature,
-    submittedBy,
+    docSignatures: meta.docSignatures,
+    keys: meta.keys,
+    isValid,
+    kind,
+    tags,
+    created_at,
+    pubkey,
+    id,
+    sig,
     signers,
+    viewers,
+    fileHashes,
+    markConfig,
+    title,
+    zipUrl,
     signedStatus,
-    fileExtensions
+    signersStatus
   }
 }

src/pages/home/index.tsx

@@ -5,7 +5,7 @@ import { useNavigate, useSearchParams } from 'react-router-dom'
 import { toast } from 'react-toastify'
 import { useAppSelector } from '../../hooks'
 import { appPrivateRoutes, appPublicRoutes } from '../../routes'
-import { Meta, ProfileMetadata } from '../../types'
+import { Meta } from '../../types'
 import { FontAwesomeIcon } from '@fortawesome/react-fontawesome'
 import { faSearch } from '@fortawesome/free-solid-svg-icons'
 import { Select } from '../../components/Select'
@@ -14,10 +14,10 @@ import { useDropzone } from 'react-dropzone'
 import { Container } from '../../components/Container'
 import styles from './style.module.scss'
 import {
-  extractSigitInfo,
+  extractSigitCardDisplayInfo,
-  SigitInfo,
+  SigitCardDisplayInfo,
-  SignedStatus
+  SigitStatus
-} from '../../hooks/useSigitMeta'
+} from '../../utils'
 
 // Unsupported Filter options are commented
 const FILTERS = [
@@ -52,30 +52,29 @@ export const HomePage = () => {
 
   const [sigits, setSigits] = useState<{ [key: string]: Meta }>({})
   const [parsedSigits, setParsedSigits] = useState<{
-    [key: string]: SigitInfo
+    [key: string]: SigitCardDisplayInfo
   }>({})
-  const [profiles, setProfiles] = useState<{ [key: string]: ProfileMetadata }>(
-    {}
-  )
   const usersAppData = useAppSelector((state) => state.userAppData)
 
   useEffect(() => {
     if (usersAppData) {
       const getSigitInfo = async () => {
+        const parsedSigits: { [key: string]: SigitCardDisplayInfo } = {}
         for (const key in usersAppData.sigits) {
           if (Object.prototype.hasOwnProperty.call(usersAppData.sigits, key)) {
-            const sigitInfo = await extractSigitInfo(usersAppData.sigits[key])
+            const sigitInfo = await extractSigitCardDisplayInfo(
+              usersAppData.sigits[key]
+            )
             if (sigitInfo) {
-              setParsedSigits((prev) => {
+              parsedSigits[key] = sigitInfo
-                return {
-                  ...prev,
-                  [key]: sigitInfo
             }
+          }
+        }
+
+        setParsedSigits({
+          ...parsedSigits
         })
       }
-          }
-        }
-      }
 
       setSigits(usersAppData.sigits)
       getSigitInfo()
@@ -240,9 +239,9 @@ export const HomePage = () => {
               const isMatch = title?.toLowerCase().includes(q.toLowerCase())
               switch (filter) {
                 case 'Completed':
-                  return signedStatus === SignedStatus.Complete && isMatch
+                  return signedStatus === SigitStatus.Complete && isMatch
                 case 'In-progress':
-                  return signedStatus === SignedStatus.Partial && isMatch
+                  return signedStatus === SigitStatus.Partial && isMatch
                 case 'Show all':
                   return isMatch
                 default:
@@ -259,8 +258,6 @@ export const HomePage = () => {
                 key={`sigit-${key}`}
                 parsedMeta={parsedSigits[key]}
                 meta={sigits[key]}
-                profiles={profiles}
-                setProfiles={setProfiles}
               />
             ))}
         </div>

src/utils/index.ts

@@ -7,3 +7,4 @@ export * from './string'
 export * from './zip'
 export * from './utils'
 export * from './mark'
+export * from './meta'

src/utils/meta.ts

@@ -0,0 +1,181 @@
+import { CreateSignatureEventContent, Meta } from '../types'
+import { parseJson } from '.'
+import { Event } from 'nostr-tools'
+import { toast } from 'react-toastify'
+
+export enum SignStatus {
+  Signed = 'Signed',
+  Pending = 'Pending',
+  Invalid = 'Invalid Sign'
+}
+
+export enum SigitStatus {
+  Partial = 'In-Progress',
+  Complete = 'Completed'
+}
+
+type Jsonable =
+  | string
+  | number
+  | boolean
+  | null
+  | undefined
+  | readonly Jsonable[]
+  | { readonly [key: string]: Jsonable }
+  | { toJSON(): Jsonable }
+
+export class SigitMetaParseError extends Error {
+  public readonly context?: Jsonable
+
+  constructor(
+    message: string,
+    options: { cause?: Error; context?: Jsonable } = {}
+  ) {
+    const { cause, context } = options
+
+    super(message, { cause })
+    this.name = this.constructor.name
+
+    this.context = context
+  }
+}
+
+/**
+ * Handle meta errors
+ * Wraps the errors without message property and stringify to a message so we can use it later
+ * @param error
+ * @returns
+ */
+function handleError(error: unknown): Error {
+  if (error instanceof Error) return error
+
+  // No message error, wrap it and stringify
+  let stringified = 'Unable to stringify the thrown value'
+  try {
+    stringified = JSON.stringify(error)
+  } catch (error) {
+    console.error(stringified, error)
+  }
+
+  return new Error(`[SiGit Error]: ${stringified}`)
+}
+
+// Reuse common error messages for meta parsing
+export enum SigitMetaParseErrorType {
+  'PARSE_ERROR_SIGNATURE_EVENT' = 'error occurred in parsing the create signature event',
+  'PARSE_ERROR_SIGNATURE_EVENT_CONTENT' = "err in parsing the createSignature event's content"
+}
+
+export interface SigitCardDisplayInfo {
+  createdAt?: number
+  title?: string
+  submittedBy?: string
+  signers: `npub1${string}`[]
+  fileExtensions: string[]
+  signedStatus: SigitStatus
+}
+
+/**
+ * Wrapper for createSignatureEvent parse that throws custom SigitMetaParseError with cause and context
+ * @param raw Raw string for parsing
+ * @returns parsed Event
+ */
+export const parseCreateSignatureEvent = async (
+  raw: string
+): Promise<Event> => {
+  try {
+    const createSignatureEvent = await parseJson<Event>(raw)
+    return createSignatureEvent
+  } catch (error) {
+    throw new SigitMetaParseError(
+      SigitMetaParseErrorType.PARSE_ERROR_SIGNATURE_EVENT,
+      {
+        cause: handleError(error),
+        context: raw
+      }
+    )
+  }
+}
+
+/**
+ * Wrapper for event content parser that throws custom SigitMetaParseError with cause and context
+ * @param raw Raw string for parsing
+ * @returns parsed CreateSignatureEventContent
+ */
+export const parseCreateSignatureEventContent = async (
+  raw: string
+): Promise<CreateSignatureEventContent> => {
+  try {
+    const createSignatureEventContent =
+      await parseJson<CreateSignatureEventContent>(raw)
+    return createSignatureEventContent
+  } catch (error) {
+    throw new SigitMetaParseError(
+      SigitMetaParseErrorType.PARSE_ERROR_SIGNATURE_EVENT_CONTENT,
+      {
+        cause: handleError(error),
+        context: raw
+      }
+    )
+  }
+}
+
+/**
+ * Extracts only necessary metadata for the card display
+ * @param meta Sigit metadata
+ * @returns SigitCardDisplayInfo
+ */
+export const extractSigitCardDisplayInfo = async (meta: Meta) => {
+  if (!meta?.createSignature) return
+
+  const sigitInfo: SigitCardDisplayInfo = {
+    signers: [],
+    fileExtensions: [],
+    signedStatus: SigitStatus.Partial
+  }
+
+  try {
+    const createSignatureEvent = await parseCreateSignatureEvent(
+      meta.createSignature
+    )
+
+    // created_at in nostr events are stored in seconds
+    sigitInfo.createdAt = createSignatureEvent.created_at * 1000
+
+    const createSignatureContent = await parseCreateSignatureEventContent(
+      createSignatureEvent.content
+    )
+
+    const files = Object.keys(createSignatureContent.fileHashes)
+    const extensions = files.reduce((result: string[], file: string) => {
+      const extension = file.split('.').pop()
+      if (extension) {
+        result.push(extension)
+      }
+      return result
+    }, [])
+
+    const signedBy = Object.keys(meta.docSignatures) as `npub1${string}`[]
+    const isCompletelySigned = createSignatureContent.signers.every((signer) =>
+      signedBy.includes(signer)
+    )
+
+    sigitInfo.title = createSignatureContent.title
+    sigitInfo.submittedBy = createSignatureEvent.pubkey
+    sigitInfo.signers = createSignatureContent.signers
+    sigitInfo.fileExtensions = extensions
+
+    if (isCompletelySigned) {
+      sigitInfo.signedStatus = SigitStatus.Complete
+    }
+
+    return sigitInfo
+  } catch (error) {
+    if (error instanceof SigitMetaParseError) {
+      toast.error(error.message)
+      console.error(error.name, error.message, error.cause, error.context)
+    } else {
+      console.error('Unexpected error', error)
+    }
+  }
+}