feat: bookmarks (#279)

src/providers/BookmarksProvider.tsx

@@ -0,0 +1,72 @@
+import { createBookmarkDraftEvent } from '@/lib/draft-event'
+import { createContext, useContext, useMemo } from 'react'
+import { useNostr } from './NostrProvider'
+import client from '@/services/client.service'
+
+type TBookmarksContext = {
+  bookmarks: string[][]
+  addBookmark: (eventId: string, eventPubkey: string, relayHint?: string) => Promise<void>
+  removeBookmark: (eventId: string) => Promise<void>
+}
+
+const BookmarksContext = createContext<TBookmarksContext | undefined>(undefined)
+
+export const useBookmarks = () => {
+  const context = useContext(BookmarksContext)
+  if (!context) {
+    throw new Error('useBookmarks must be used within a BookmarksProvider')
+  }
+  return context
+}
+
+export function BookmarksProvider({ children }: { children: React.ReactNode }) {
+  const { pubkey: accountPubkey, bookmarkListEvent, publish, updateBookmarkListEvent } = useNostr()
+  const bookmarks = useMemo(
+    () => (bookmarkListEvent ? bookmarkListEvent.tags : []),
+    [bookmarkListEvent]
+  )
+
+  const addBookmark = async (eventId: string, eventPubkey: string, relayHint?: string) => {
+    if (!accountPubkey) return
+
+    const relayHintToUse = relayHint || client.getEventHint(eventId)
+
+    const newTag = ['e', eventId, relayHintToUse, eventPubkey]
+
+    const currentTags = bookmarkListEvent?.tags || []
+
+    const isDuplicate = currentTags.some((tag) => tag[0] === 'e' && tag[1] === eventId)
+
+    if (isDuplicate) return
+
+    const newTags = [...currentTags, newTag]
+
+    const newBookmarkDraftEvent = createBookmarkDraftEvent(newTags)
+    const newBookmarkEvent = await publish(newBookmarkDraftEvent)
+    await updateBookmarkListEvent(newBookmarkEvent)
+  }
+
+  const removeBookmark = async (eventId: string) => {
+    if (!accountPubkey || !bookmarkListEvent) return
+
+    const newTags = bookmarkListEvent.tags.filter((tag) => !(tag[0] === 'e' && tag[1] === eventId))
+
+    if (newTags.length === bookmarkListEvent.tags.length) return
+
+    const newBookmarkDraftEvent = createBookmarkDraftEvent(newTags)
+    const newBookmarkEvent = await publish(newBookmarkDraftEvent)
+    await updateBookmarkListEvent(newBookmarkEvent)
+  }
+
+  return (
+    <BookmarksContext.Provider
+      value={{
+        bookmarks,
+        addBookmark,
+        removeBookmark
+      }}
+    >
+      {children}
+    </BookmarksContext.Provider>
+  )
+}