Initial Commit

www/src/lib/sse.ts

@@ -0,0 +1,67 @@
+import type { Note, ShareInvitation } from '@/types'
+
+export interface SSEHandlers {
+  onNoteCreated: (note: Note) => void
+  onNoteUpdated: (note: Note) => void
+  onNoteDeleted: (data: { id: string }) => void
+  onInvitationReceived?: (invitation: ShareInvitation) => void
+  onError: (err: Event) => void
+}
+
+export function createSSEClient(url: string, handlers: SSEHandlers): { close: () => void } {
+  const eventSource = new EventSource(url)
+
+  eventSource.addEventListener('note_created', (event: MessageEvent) => {
+    try {
+      const note: Note = JSON.parse(event.data)
+      handlers.onNoteCreated(note)
+    } catch {
+      handlers.onError(new Event('parse_error'))
+    }
+  })
+
+  eventSource.addEventListener('note_updated', (event: MessageEvent) => {
+    try {
+      const note: Note = JSON.parse(event.data)
+      handlers.onNoteUpdated(note)
+    } catch {
+      handlers.onError(new Event('parse_error'))
+    }
+  })
+
+  eventSource.addEventListener('note_deleted', (event: MessageEvent) => {
+    try {
+      const data: { id: string } = JSON.parse(event.data)
+      handlers.onNoteDeleted(data)
+    } catch {
+      handlers.onError(new Event('parse_error'))
+    }
+  })
+
+  eventSource.addEventListener('invitation_received', (event: MessageEvent) => {
+    try {
+      const raw = JSON.parse(event.data)
+      const invitation: ShareInvitation = {
+        id: raw.id,
+        fromPublicKey: raw.from_public_key,
+        toPublicKey: raw.to_public_key,
+        encryptedGroupKey: raw.encrypted_group_key,
+        iv: raw.iv,
+        noteId: raw.note_id,
+        noteTitle: raw.note_title,
+        created_at: raw.created_at,
+      }
+      handlers.onInvitationReceived?.(invitation)
+    } catch {
+      handlers.onError(new Event('parse_error'))
+    }
+  })
+
+  eventSource.onerror = (err: Event) => {
+    handlers.onError(err)
+  }
+
+  return {
+    close: () => eventSource.close(),
+  }
+}