simple nostr service

shared/src/commonMain/kotlin/su/reya/coop/Nostr.kt

@@ -3,22 +3,30 @@ package su.reya.coop
 import rust.nostr.sdk.Client
 import rust.nostr.sdk.ClientBuilder
 import rust.nostr.sdk.ClientOptions
+import rust.nostr.sdk.Event
 import rust.nostr.sdk.EventBuilder
+import rust.nostr.sdk.Filter
+import rust.nostr.sdk.HandleNotification
 import rust.nostr.sdk.Keys
+import rust.nostr.sdk.Kind
+import rust.nostr.sdk.KindStandard
 import rust.nostr.sdk.Metadata
 import rust.nostr.sdk.MetadataRecord
+import rust.nostr.sdk.NostrConnect
 import rust.nostr.sdk.NostrDatabase
 import rust.nostr.sdk.NostrGossip
 import rust.nostr.sdk.NostrSigner
+import rust.nostr.sdk.RelayMessage
 import rust.nostr.sdk.RelayUrl
+import rust.nostr.sdk.ReqExitPolicy
+import rust.nostr.sdk.SubscribeAutoCloseOptions
+import rust.nostr.sdk.Timestamp
 
 class Nostr {
     var client: Client? = null
         private set
     var signer: NostrSigner? = null
         private set
-    var deviceSigner: NostrSigner? = null
-        private set
 
     fun init(dbPath: String) {
         val lmdb = NostrDatabase.lmdb(dbPath)
@@ -39,20 +47,61 @@ class Nostr {
         this.client?.shutdown()
     }
 
-    suspend fun createIdentity(keys: Keys, name: String, bio: String, picture: String?) {
+    suspend fun setKeySigner(keys: Keys) {
         signer = NostrSigner.keys(keys)
+        this.getMetadata()
+    }
 
-        // Construct metadata
-        val metadata = Metadata.fromRecord(
-            MetadataRecord(
-                name = name,
-                displayName = name,
-                about = bio,
-                picture = picture
+    suspend fun setRemoteSigner(signer: NostrConnect) {
+        this.signer = NostrSigner.nostrConnect(signer)
+        this.getMetadata()
+    }
+
+    suspend fun getMetadata() {
+        val currentUserPubKey = this.signer?.getPublicKey() ?: return
+        val opts = SubscribeAutoCloseOptions().exitPolicy(ReqExitPolicy.ExitOnEose)
+        val filter = Filter().author(currentUserPubKey).limit(10u).kinds(
+            listOf(
+                Kind.fromStd(KindStandard.METADATA),
+                Kind.fromStd(KindStandard.CONTACT_LIST),
+                Kind.fromStd(KindStandard.INBOX_RELAYS)
             )
         )
 
-        // Construct event and sign it
+        this.client?.subscribe(filter, opts)
+    }
+
+    suspend fun handleNotifications() {
+        val now = Timestamp.now()
+
+        this.client?.handleNotifications(object : HandleNotification {
+            override suspend fun handle(relayUrl: RelayUrl, subscriptionId: String, event: Event) {
+                TODO("Not yet implemented")
+            }
+
+            override suspend fun handleMsg(
+                relayUrl: RelayUrl,
+                msg: RelayMessage
+            ) {
+                TODO("Not yet implemented")
+            }
+        })
+    }
+
+    suspend fun createIdentity(keys: Keys, name: String, bio: String, picture: String?) {
+        // Set signer
+        signer = NostrSigner.keys(keys)
+
+        // Construct metadata records
+        val records = MetadataRecord(
+            name = name,
+            displayName = name,
+            about = bio,
+            picture = picture
+        )
+
+        // Construct a nostr event and sign it
+        val metadata = Metadata.fromRecord(records)
         val builder = EventBuilder.metadata(metadata).build(keys.publicKey())
         val event = this.signer?.signEvent(builder) ?: return