feat: 💨

src/lib/notification.ts

@@ -0,0 +1,35 @@
+import { kinds, NostrEvent } from 'nostr-tools'
+import { isMentioningMutedUsers } from './event'
+import { tagNameEquals } from './tag'
+
+export function notificationFilter(
+  event: NostrEvent,
+  {
+    pubkey,
+    mutePubkeySet,
+    hideContentMentioningMutedUsers,
+    hideUntrustedNotifications,
+    isUserTrusted
+  }: {
+    pubkey?: string | null
+    mutePubkeySet: Set<string>
+    hideContentMentioningMutedUsers?: boolean
+    hideUntrustedNotifications?: boolean
+    isUserTrusted: (pubkey: string) => boolean
+  }
+): boolean {
+  if (
+    mutePubkeySet.has(event.pubkey) ||
+    (hideContentMentioningMutedUsers && isMentioningMutedUsers(event, mutePubkeySet)) ||
+    (hideUntrustedNotifications && !isUserTrusted(event.pubkey))
+  ) {
+    return false
+  }
+
+  if (pubkey && event.kind === kinds.Reaction) {
+    const targetPubkey = event.tags.findLast(tagNameEquals('p'))?.[1]
+    if (targetPubkey !== pubkey) return false
+  }
+
+  return true
+}