v0.47.0

Adds the collection of the push notification token to the Privacy.MD

PRIVACY.md

@@ -4,7 +4,7 @@ Effective as of Jan 20, 2023 for the distributed applications in the Play Store
 
 The Amethyst app for Android does not collect or process any personal information from its users. The app is used to connect to third-party Nostr servers (also called Relays) that may or may not collect personal information and are not covered by this privacy policy. Each third-party relay server comes equipped with its own privacy policy and terms of use that can be viewed through the app or through that server's website. The developers of this open source project or maintainers of the distribution channels (app stores) do not have access to the data located in the user's phone. Accounts are fully maintained by the user. We do not have control over them. 
 
-Data from connected accounts is only stored locally on the device when it is required for functionality and performance of Amethyst. This data is strictly confidental and cannot be accessed by other apps (on non-rooted devices). Phone data can be deleted by clearing Amethyst's local storage or uninstalling the app.
+The app may collect a per-device token, your public key and a preferred Relay to connect to and provide push notification services through Google's Firebase Cloud Messaging. Other than that, the data from connected accounts is only stored locally on the device when it is required for functionality and performance of Amethyst. This data is strictly confidental and cannot be accessed by other apps (on non-rooted devices). Phone data can be deleted by clearing Amethyst's local storage or uninstalling the app.
 
 You cannot use the Amethyst app for Android to submit Objectionable Content to relays. Objectionable Content includes, but is not limited to: (i) sexually explicit materials; (ii) obscene, defamatory, libelous, slanderous, violent and/or unlawful content or profanity; (iii) content that infringes upon the rights of any third party, including copyright, trademark, privacy, publicity or other personal or proprietary right, or that is deceptive or fraudulent; (iv) content that promotes the use or sale of illegal or regulated substances, tobacco products, ammunition and/or firearms; and (v) illegal content related to gambling.
 

app/build.gradle

@@ -13,8 +13,8 @@ android {
         applicationId "com.vitorpamplona.amethyst"
         minSdk 26
         targetSdk 33
-        versionCode 156
-        versionName "0.46.2"
+        versionCode 161
+        versionName "0.47.0"
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         vectorDrawables {

app/src/main/java/com/vitorpamplona/amethyst/model/LocalCache.kt

@@ -281,6 +281,18 @@ object LocalCache {
         refreshObservers(note)
     }
 
+    private fun consume(event: AudioTrackEvent) {
+        val note = getOrCreateAddressableNote(event.address())
+        val author = getOrCreateUser(event.pubKey)
+
+        // Already processed this event.
+        if (note.event != null) return
+
+        note.loadEvent(event, author, emptyList())
+
+        refreshObservers(note)
+    }
+
     fun consume(event: BadgeDefinitionEvent) {
         val note = getOrCreateAddressableNote(event.address())
         val author = getOrCreateUser(event.pubKey)
@@ -920,6 +932,7 @@ object LocalCache {
 
         try {
             when (event) {
+                is AudioTrackEvent -> consume(event)
                 is BadgeAwardEvent -> consume(event)
                 is BadgeDefinitionEvent -> consume(event)
                 is BadgeProfilesEvent -> consume(event)

app/src/main/java/com/vitorpamplona/amethyst/service/NostrGlobalDataSource.kt

@@ -1,5 +1,6 @@
 package com.vitorpamplona.amethyst.service
 
+import com.vitorpamplona.amethyst.service.model.AudioTrackEvent
 import com.vitorpamplona.amethyst.service.model.ChannelMessageEvent
 import com.vitorpamplona.amethyst.service.model.HighlightEvent
 import com.vitorpamplona.amethyst.service.model.LongTextNoteEvent
@@ -13,7 +14,7 @@ object NostrGlobalDataSource : NostrDataSource("GlobalFeed") {
     fun createGlobalFilter() = TypedFilter(
         types = setOf(FeedType.GLOBAL),
         filter = JsonFilter(
-            kinds = listOf(TextNoteEvent.kind, PollNoteEvent.kind, ChannelMessageEvent.kind, LongTextNoteEvent.kind, HighlightEvent.kind),
+            kinds = listOf(TextNoteEvent.kind, PollNoteEvent.kind, ChannelMessageEvent.kind, AudioTrackEvent.kind, LongTextNoteEvent.kind, HighlightEvent.kind),
             limit = 200
         )
     )

app/src/main/java/com/vitorpamplona/amethyst/service/NostrHashtagDataSource.kt

@@ -3,6 +3,7 @@ package com.vitorpamplona.amethyst.service
 import androidx.compose.ui.text.capitalize
 import com.vitorpamplona.amethyst.service.model.ChannelMessageEvent
 import com.vitorpamplona.amethyst.service.model.LongTextNoteEvent
+import com.vitorpamplona.amethyst.service.model.PollNoteEvent
 import com.vitorpamplona.amethyst.service.model.TextNoteEvent
 import com.vitorpamplona.amethyst.service.relays.COMMON_FEED_TYPES
 import com.vitorpamplona.amethyst.service.relays.JsonFilter
@@ -25,7 +26,7 @@ object NostrHashtagDataSource : NostrDataSource("SingleHashtagFeed") {
                         hashToLoad.capitalize()
                     )
                 ),
-                kinds = listOf(TextNoteEvent.kind, ChannelMessageEvent.kind, LongTextNoteEvent.kind),
+                kinds = listOf(TextNoteEvent.kind, ChannelMessageEvent.kind, LongTextNoteEvent.kind, LongTextNoteEvent.kind, PollNoteEvent.kind),
                 limit = 200
             )
         )

app/src/main/java/com/vitorpamplona/amethyst/service/NostrHomeDataSource.kt

@@ -2,6 +2,7 @@ package com.vitorpamplona.amethyst.service
 
 import com.vitorpamplona.amethyst.model.Account
 import com.vitorpamplona.amethyst.model.UserState
+import com.vitorpamplona.amethyst.service.model.AudioTrackEvent
 import com.vitorpamplona.amethyst.service.model.HighlightEvent
 import com.vitorpamplona.amethyst.service.model.LongTextNoteEvent
 import com.vitorpamplona.amethyst.service.model.PollNoteEvent
@@ -56,7 +57,7 @@ object NostrHomeDataSource : NostrDataSource("HomeFeed") {
         return TypedFilter(
             types = setOf(FeedType.FOLLOWS),
             filter = JsonFilter(
-                kinds = listOf(TextNoteEvent.kind, LongTextNoteEvent.kind, PollNoteEvent.kind, HighlightEvent.kind),
+                kinds = listOf(TextNoteEvent.kind, LongTextNoteEvent.kind, PollNoteEvent.kind, HighlightEvent.kind, AudioTrackEvent.kind),
                 authors = followSet,
                 limit = 400,
                 since = latestEOSEs.users[account.userProfile()]?.followList?.get(account.defaultHomeFollowList)?.relayList
@@ -72,7 +73,7 @@ object NostrHomeDataSource : NostrDataSource("HomeFeed") {
         return TypedFilter(
             types = setOf(FeedType.FOLLOWS),
             filter = JsonFilter(
-                kinds = listOf(TextNoteEvent.kind, LongTextNoteEvent.kind, HighlightEvent.kind),
+                kinds = listOf(TextNoteEvent.kind, LongTextNoteEvent.kind, HighlightEvent.kind, AudioTrackEvent.kind),
                 tags = mapOf(
                     "t" to hashToLoad.map {
                         listOf(it, it.lowercase(), it.uppercase(), it.capitalize())

app/src/main/java/com/vitorpamplona/amethyst/service/NostrSingleEventDataSource.kt

@@ -29,7 +29,7 @@ object NostrSingleEventDataSource : NostrDataSource("SingleEventFeed") {
                             ReactionEvent.kind, RepostEvent.kind, ReportEvent.kind,
                             LnZapEvent.kind, LnZapRequestEvent.kind,
                             BadgeAwardEvent.kind, BadgeDefinitionEvent.kind, BadgeProfilesEvent.kind,
-                            PollNoteEvent.kind
+                            PollNoteEvent.kind, AudioTrackEvent.kind
                         ),
                         tags = mapOf("a" to listOf(aTag.toTag())),
                         since = it.lastReactionsDownloadTime
@@ -80,7 +80,8 @@ object NostrSingleEventDataSource : NostrDataSource("SingleEventFeed") {
                         LnZapEvent.kind,
                         LnZapRequestEvent.kind,
                         PollNoteEvent.kind,
-                        HighlightEvent.kind
+                        HighlightEvent.kind,
+                        AudioTrackEvent.kind
                     ),
                     tags = mapOf("e" to listOf(it.idHex)),
                     since = it.lastReactionsDownloadTime
@@ -119,7 +120,7 @@ object NostrSingleEventDataSource : NostrDataSource("SingleEventFeed") {
                         BadgeDefinitionEvent.kind, BadgeAwardEvent.kind, BadgeProfilesEvent.kind,
                         PrivateDmEvent.kind,
                         FileHeaderEvent.kind, FileStorageEvent.kind, FileStorageHeaderEvent.kind,
-                        HighlightEvent.kind
+                        HighlightEvent.kind, AudioTrackEvent.kind
                     ),
                     ids = interestedEvents.toList()
                 )

app/src/main/java/com/vitorpamplona/amethyst/service/NostrUserProfileDataSource.kt

@@ -28,7 +28,7 @@ object NostrUserProfileDataSource : NostrDataSource("UserProfileFeed") {
         TypedFilter(
             types = COMMON_FEED_TYPES,
             filter = JsonFilter(
-                kinds = listOf(TextNoteEvent.kind, RepostEvent.kind, LongTextNoteEvent.kind, PollNoteEvent.kind, HighlightEvent.kind),
+                kinds = listOf(TextNoteEvent.kind, RepostEvent.kind, LongTextNoteEvent.kind, AudioTrackEvent.kind, PollNoteEvent.kind, HighlightEvent.kind),
                 authors = listOf(it.pubkeyHex),
                 limit = 200
             )

app/src/main/java/com/vitorpamplona/amethyst/service/model/AudioTrackEvent.kt

@@ -0,0 +1,61 @@
+package com.vitorpamplona.amethyst.service.model
+
+import com.vitorpamplona.amethyst.model.HexKey
+import com.vitorpamplona.amethyst.model.toHexKey
+import nostr.postr.Utils
+import java.util.Date
+
+class AudioTrackEvent(
+    id: HexKey,
+    pubKey: HexKey,
+    createdAt: Long,
+    tags: List<List<String>>,
+    content: String,
+    sig: HexKey
+) : Event(id, pubKey, createdAt, kind, tags, content, sig), AddressableEvent {
+
+    override fun dTag() = tags.firstOrNull { it.size > 1 && it[0] == "d" }?.get(1) ?: ""
+    override fun address() = ATag(kind, pubKey, dTag(), null)
+
+    fun participants() = tags.filter { it.size > 1 && it[0] == "p" }.map { Participant(it[1], it.getOrNull(2)) }
+    fun type() = tags.firstOrNull { it.size > 1 && it[0] == TYPE }?.get(1)
+    fun price() = tags.firstOrNull { it.size > 1 && it[0] == PRICE }?.get(1)
+    fun cover() = tags.firstOrNull { it.size > 1 && it[0] == COVER }?.get(1)
+    fun subject() = tags.firstOrNull { it.size > 1 && it[0] == SUBJECT }?.get(1)
+    fun media() = tags.firstOrNull { it.size > 1 && it[0] == MEDIA }?.get(1)
+
+    companion object {
+        const val kind = 31337
+
+        private const val TYPE = "c"
+        private const val PRICE = "price"
+        private const val COVER = "cover"
+        private const val SUBJECT = "subject"
+        private const val MEDIA = "media"
+
+        fun create(
+            type: String,
+            media: String,
+            price: String? = null,
+            cover: String? = null,
+            subject: String? = null,
+            privateKey: ByteArray,
+            createdAt: Long = Date().time / 1000
+        ): AudioTrackEvent {
+            val tags = listOfNotNull(
+                listOf(MEDIA, media),
+                listOf(TYPE, type),
+                price?.let { listOf(PRICE, it) },
+                cover?.let { listOf(COVER, it) },
+                subject?.let { listOf(SUBJECT, it) }
+            )
+
+            val pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
+            val id = generateId(pubKey, createdAt, kind, tags, "")
+            val sig = Utils.sign(id, privateKey)
+            return AudioTrackEvent(id.toHexKey(), pubKey, createdAt, tags, "", sig.toHexKey())
+        }
+    }
+}
+
+data class Participant(val key: String, val role: String?)

app/src/main/java/com/vitorpamplona/amethyst/service/model/BadgeDefinitionEvent.kt

@@ -9,9 +9,9 @@ class BadgeDefinitionEvent(
     tags: List<List<String>>,
     content: String,
     sig: HexKey
-) : Event(id, pubKey, createdAt, kind, tags, content, sig) {
-    fun dTag() = tags.firstOrNull { it.size > 1 && it[0] == "d" }?.get(1) ?: ""
-    fun address() = ATag(kind, pubKey, dTag(), null)
+) : Event(id, pubKey, createdAt, kind, tags, content, sig), AddressableEvent {
+    override fun dTag() = tags.firstOrNull { it.size > 1 && it[0] == "d" }?.get(1) ?: ""
+    override fun address() = ATag(kind, pubKey, dTag(), null)
 
     fun name() = tags.firstOrNull { it.size > 1 && it[0] == "name" }?.get(1)
     fun thumb() = tags.firstOrNull { it.size > 1 && it[0] == "thumb" }?.get(1)

app/src/main/java/com/vitorpamplona/amethyst/service/model/BadgeProfilesEvent.kt

@@ -9,7 +9,7 @@ class BadgeProfilesEvent(
     tags: List<List<String>>,
     content: String,
     sig: HexKey
-) : Event(id, pubKey, createdAt, kind, tags, content, sig) {
+) : Event(id, pubKey, createdAt, kind, tags, content, sig), AddressableEvent {
     fun badgeAwardEvents() = tags.filter { it.firstOrNull() == "e" }.mapNotNull { it.getOrNull(1) }
     fun badgeAwardDefinitions() = tags.filter { it.firstOrNull() == "a" }.mapNotNull {
         val aTagValue = it.getOrNull(1)
@@ -18,8 +18,8 @@ class BadgeProfilesEvent(
         if (aTagValue != null) ATag.parse(aTagValue, relay) else null
     }
 
-    fun dTag() = tags.filter { it.firstOrNull() == "d" }.mapNotNull { it.getOrNull(1) }.firstOrNull() ?: ""
-    fun address() = ATag(kind, pubKey, dTag(), null)
+    override fun dTag() = tags.filter { it.firstOrNull() == "d" }.mapNotNull { it.getOrNull(1) }.firstOrNull() ?: ""
+    override fun address() = ATag(kind, pubKey, dTag(), null)
 
     companion object {
         const val kind = 30008

app/src/main/java/com/vitorpamplona/amethyst/service/model/Event.kt

@@ -220,6 +220,7 @@ open class Event(
         fun fromJson(json: JsonElement, lenient: Boolean = false): Event = gson.fromJson(json, Event::class.java).getRefinedEvent(lenient)
 
         fun Event.getRefinedEvent(lenient: Boolean = false): Event = when (kind) {
+            AudioTrackEvent.kind -> AudioTrackEvent(id, pubKey, createdAt, tags, content, sig)
             BadgeAwardEvent.kind -> BadgeAwardEvent(id, pubKey, createdAt, tags, content, sig)
             BadgeDefinitionEvent.kind -> BadgeDefinitionEvent(id, pubKey, createdAt, tags, content, sig)
             BadgeProfilesEvent.kind -> BadgeProfilesEvent(id, pubKey, createdAt, tags, content, sig)
@@ -282,3 +283,8 @@ open class Event(
         }
     }
 }
+
+interface AddressableEvent {
+    fun dTag(): String
+    fun address(): ATag
+}

app/src/main/java/com/vitorpamplona/amethyst/service/model/GeneralListEvent.kt

@@ -14,9 +14,9 @@ abstract class GeneralListEvent(
     tags: List<List<String>>,
     content: String,
     sig: HexKey
-) : Event(id, pubKey, createdAt, kind, tags, content, sig) {
-    fun dTag() = tags.filter { it.firstOrNull() == "d" }.mapNotNull { it.getOrNull(1) }.firstOrNull() ?: ""
-    fun address() = ATag(kind, pubKey, dTag(), null)
+) : Event(id, pubKey, createdAt, kind, tags, content, sig), AddressableEvent {
+    override fun dTag() = tags.filter { it.firstOrNull() == "d" }.mapNotNull { it.getOrNull(1) }.firstOrNull() ?: ""
+    override fun address() = ATag(kind, pubKey, dTag(), null)
 
     fun category() = dTag()
     fun bookmarkedPosts() = taggedEvents()

app/src/main/java/com/vitorpamplona/amethyst/service/model/LnZapRequestEvent.kt

@@ -71,7 +71,7 @@ class LnZapRequestEvent(
                 listOf("p", originalNote.pubKey()),
                 listOf("relays") + relays
             )
-            if (originalNote is LongTextNoteEvent) {
+            if (originalNote is AddressableEvent) {
                 tags = tags + listOf(listOf("a", originalNote.address().toTag()))
             }
             if (pollOption != null && pollOption >= 0) {

app/src/main/java/com/vitorpamplona/amethyst/service/model/LongTextNoteEvent.kt

@@ -12,9 +12,9 @@ class LongTextNoteEvent(
     tags: List<List<String>>,
     content: String,
     sig: HexKey
-) : BaseTextNoteEvent(id, pubKey, createdAt, kind, tags, content, sig) {
-    fun dTag() = tags.filter { it.firstOrNull() == "d" }.mapNotNull { it.getOrNull(1) }.firstOrNull() ?: ""
-    fun address() = ATag(kind, pubKey, dTag(), null)
+) : BaseTextNoteEvent(id, pubKey, createdAt, kind, tags, content, sig), AddressableEvent {
+    override fun dTag() = tags.filter { it.firstOrNull() == "d" }.mapNotNull { it.getOrNull(1) }.firstOrNull() ?: ""
+    override fun address() = ATag(kind, pubKey, dTag(), null)
 
     fun topics() = tags.filter { it.firstOrNull() == "t" }.mapNotNull { it.getOrNull(1) }
     fun title() = tags.filter { it.firstOrNull() == "title" }.mapNotNull { it.getOrNull(1) }.firstOrNull()

app/src/main/java/com/vitorpamplona/amethyst/service/model/MuteListEvent.kt

@@ -15,9 +15,9 @@ class MuteListEvent(
     tags: List<List<String>>,
     content: String,
     sig: HexKey
-) : Event(id, pubKey, createdAt, kind, tags, content, sig) {
-    fun dTag() = tags.filter { it.firstOrNull() == "d" }.mapNotNull { it.getOrNull(1) }.firstOrNull() ?: ""
-    fun address() = ATag(kind, pubKey, dTag(), null)
+) : Event(id, pubKey, createdAt, kind, tags, content, sig), AddressableEvent {
+    override fun dTag() = tags.filter { it.firstOrNull() == "d" }.mapNotNull { it.getOrNull(1) }.firstOrNull() ?: ""
+    override fun address() = ATag(kind, pubKey, dTag(), null)
 
     fun plainContent(privKey: ByteArray): String? {
         return try {

app/src/main/java/com/vitorpamplona/amethyst/service/model/ReactionEvent.kt

@@ -32,7 +32,7 @@ class ReactionEvent(
             val pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
 
             var tags = listOf(listOf("e", originalNote.id()), listOf("p", originalNote.pubKey()))
-            if (originalNote is LongTextNoteEvent) {
+            if (originalNote is AddressableEvent) {
                 tags = tags + listOf(listOf("a", originalNote.address().toTag()))
             }
 

app/src/main/java/com/vitorpamplona/amethyst/service/model/ReportEvent.kt

@@ -63,7 +63,7 @@ class ReportEvent(
             val pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
             var tags: List<List<String>> = listOf(reportPostTag, reportAuthorTag)
 
-            if (reportedPost is LongTextNoteEvent) {
+            if (reportedPost is AddressableEvent) {
                 tags = tags + listOf(listOf("a", reportedPost.address().toTag()))
             }
 

app/src/main/java/com/vitorpamplona/amethyst/service/model/RepostEvent.kt

@@ -36,7 +36,7 @@ class RepostEvent(
             val pubKey = Utils.pubkeyCreate(privateKey).toHexKey()
             var tags: List<List<String>> = boostedPost.tags().plus(listOf(replyToPost, replyToAuthor))
 
-            if (boostedPost is LongTextNoteEvent) {
+            if (boostedPost is AddressableEvent) {
                 tags = tags + listOf(listOf("a", boostedPost.address().toTag()))
             }
 

app/src/main/java/com/vitorpamplona/amethyst/service/notifications/EventNotificationConsumer.kt

@@ -46,7 +46,7 @@ class EventNotificationConsumer(private val applicationContext: Context) {
                     val user = note.author?.toBestDisplayName() ?: ""
                     val userPicture = note.author?.profilePicture()
                     val noteUri = note.toNEvent()
-                    notificationManager().sendDMNotification(content, user, userPicture, noteUri, applicationContext)
+                    notificationManager().sendDMNotification(event.id, content, user, userPicture, noteUri, applicationContext)
                 }
             }
         }
@@ -88,7 +88,7 @@ class EventNotificationConsumer(private val applicationContext: Context) {
                 }
                 val userPicture = senderInfo?.first?.profilePicture()
                 val noteUri = "nostr:Notifications"
-                notificationManager().sendZapNotification(content, title, userPicture, noteUri, applicationContext)
+                notificationManager().sendZapNotification(event.id, content, title, userPicture, noteUri, applicationContext)
             }
         }
     }

app/src/main/java/com/vitorpamplona/amethyst/service/notifications/NotificationUtils.kt

@@ -15,10 +15,6 @@ import com.vitorpamplona.amethyst.R
 import com.vitorpamplona.amethyst.ui.MainActivity
 
 object NotificationUtils {
-
-    // Notification ID.
-    private var notificationId = 0
-
     private var dmChannel: NotificationChannel? = null
     private var zapChannel: NotificationChannel? = null
 
@@ -63,6 +59,7 @@ object NotificationUtils {
     }
 
     fun NotificationManager.sendZapNotification(
+        id: String,
         messageBody: String,
         messageTitle: String,
         pictureUrl: String?,
@@ -72,10 +69,11 @@ object NotificationUtils {
         val zapChannel = getOrCreateZapChannel(applicationContext)
         val channelId = applicationContext.getString(R.string.app_notification_zaps_channel_id)
 
-        sendNotification(messageBody, messageTitle, pictureUrl, uri, channelId, applicationContext)
+        sendNotification(id, messageBody, messageTitle, pictureUrl, uri, channelId, applicationContext)
     }
 
     fun NotificationManager.sendDMNotification(
+        id: String,
         messageBody: String,
         messageTitle: String,
         pictureUrl: String?,
@@ -85,10 +83,11 @@ object NotificationUtils {
         val dmChannel = getOrCreateDMChannel(applicationContext)
         val channelId = applicationContext.getString(R.string.app_notification_dms_channel_id)
 
-        sendNotification(messageBody, messageTitle, pictureUrl, uri, channelId, applicationContext)
+        sendNotification(id, messageBody, messageTitle, pictureUrl, uri, channelId, applicationContext)
     }
 
     fun NotificationManager.sendNotification(
+        id: String,
         messageBody: String,
         messageTitle: String,
         pictureUrl: String?,
@@ -104,6 +103,7 @@ object NotificationUtils {
             val imageLoader = ImageLoader(applicationContext)
             val imageResult = imageLoader.executeBlocking(request)
             sendNotification(
+                id = id,
                 messageBody = messageBody,
                 messageTitle = messageTitle,
                 picture = imageResult.drawable as? BitmapDrawable,
@@ -113,6 +113,7 @@ object NotificationUtils {
             )
         } else {
             sendNotification(
+                id = id,
                 messageBody = messageBody,
                 messageTitle = messageTitle,
                 picture = null,
@@ -124,6 +125,7 @@ object NotificationUtils {
     }
 
     private fun NotificationManager.sendNotification(
+        id: String,
         messageBody: String,
         messageTitle: String,
         picture: BitmapDrawable?,
@@ -137,7 +139,7 @@ object NotificationUtils {
 
         val contentPendingIntent = PendingIntent.getActivity(
             applicationContext,
-            notificationId,
+            id.hashCode(),
             contentIntent,
             PendingIntent.FLAG_MUTABLE
         )
@@ -171,9 +173,7 @@ object NotificationUtils {
             .setPriority(NotificationCompat.PRIORITY_HIGH)
             .setAutoCancel(true)
 
-        notify(notificationId, builder.build())
-
-        notificationId++
+        notify(id.hashCode(), builder.build())
     }
 
     /**

app/src/main/java/com/vitorpamplona/amethyst/ui/components/ExpandableRichTextViewer.kt

@@ -13,6 +13,7 @@ import androidx.compose.material.ButtonDefaults
 import androidx.compose.material.MaterialTheme
 import androidx.compose.material.Text
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.derivedStateOf
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
@@ -50,10 +51,14 @@ fun ExpandableRichTextViewer(
         minOf(firstSpaceAfterCut, firstNewLineAfterCut)
     }
 
-    val text = if (showFullText) {
-        content
-    } else {
-        content.take(whereToCut)
+    val text by remember(content) {
+        derivedStateOf {
+            if (showFullText) {
+                content
+            } else {
+                content.take(whereToCut)
+            }
+        }
     }
 
     Box {

app/src/main/java/com/vitorpamplona/amethyst/ui/components/RichTextViewer.kt

@@ -50,7 +50,6 @@ import java.net.MalformedURLException
 import java.net.URISyntaxException
 import java.net.URL
 import java.util.regex.Pattern
-import kotlin.time.ExperimentalTime
 
 val imageExtensions = listOf("png", "jpg", "gif", "bmp", "jpeg", "webp", "svg")
 val videoExtensions = listOf("mp4", "avi", "wmv", "mpg", "amv", "webm", "mov", "mp3")
@@ -113,7 +112,6 @@ class RichTextViewerState(
     val imageList: List<ZoomableUrlContent>
 )
 
-@OptIn(ExperimentalTime::class)
 @Composable
 private fun RenderRegular(
     content: String,

app/src/main/java/com/vitorpamplona/amethyst/ui/components/UrlPreviewCard.kt

@@ -10,6 +10,7 @@ import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material.MaterialTheme
 import androidx.compose.material.Text
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.remember
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
 import androidx.compose.ui.graphics.Color
@@ -41,13 +42,15 @@ fun UrlPreviewCard(
             )
     ) {
         Column {
-            val validatedUrl = URL(previewInfo.url)
+            val validatedUrl = remember { URL(previewInfo.url) }
 
             // correctly treating relative images
-            val imageUrl = if (previewInfo.image.startsWith("/")) {
-                URL(validatedUrl, previewInfo.image).toString()
-            } else {
-                previewInfo.image
+            val imageUrl = remember {
+                if (previewInfo.image.startsWith("/")) {
+                    URL(validatedUrl, previewInfo.image).toString()
+                } else {
+                    previewInfo.image
+                }
             }
 
             AsyncImage(

app/src/main/java/com/vitorpamplona/amethyst/ui/components/VideoView.kt

@@ -1,6 +1,8 @@
 package com.vitorpamplona.amethyst.ui.components
 
+import android.graphics.drawable.Drawable
 import android.net.Uri
+import android.util.Log
 import android.view.View
 import android.view.ViewGroup
 import android.widget.FrameLayout
@@ -28,6 +30,7 @@ import androidx.compose.runtime.MutableState
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
+import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.runtime.rememberUpdatedState
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
@@ -46,6 +49,8 @@ import androidx.compose.ui.viewinterop.AndroidView
 import androidx.core.net.toUri
 import androidx.lifecycle.Lifecycle
 import androidx.lifecycle.LifecycleEventObserver
+import coil.imageLoader
+import coil.request.ImageRequest
 import com.google.android.exoplayer2.C
 import com.google.android.exoplayer2.ExoPlayer
 import com.google.android.exoplayer2.MediaItem
@@ -55,6 +60,8 @@ import com.google.android.exoplayer2.source.ProgressiveMediaSource
 import com.google.android.exoplayer2.ui.AspectRatioFrameLayout
 import com.google.android.exoplayer2.ui.StyledPlayerView
 import com.vitorpamplona.amethyst.VideoCache
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
 import java.io.File
 
 public var muted = mutableStateOf(true)
@@ -62,20 +69,55 @@ public var muted = mutableStateOf(true)
 @Composable
 fun VideoView(localFile: File?, description: String? = null, onDialog: ((Boolean) -> Unit)? = null) {
     if (localFile != null) {
-        VideoView(localFile.toUri(), description, onDialog)
+        VideoView(localFile.toUri(), description, null, onDialog)
     }
 }
 
 @Composable
 fun VideoView(videoUri: String, description: String? = null, onDialog: ((Boolean) -> Unit)? = null) {
-    VideoView(Uri.parse(videoUri), description, onDialog)
+    VideoView(Uri.parse(videoUri), description, null, onDialog)
 }
 
 @Composable
-fun VideoView(videoUri: Uri, description: String? = null, onDialog: ((Boolean) -> Unit)? = null) {
+fun VideoView(videoUri: String, description: String? = null, thumbUri: String, onDialog: ((Boolean) -> Unit)? = null) {
+    var loadingFinished by remember { mutableStateOf<Pair<Boolean, Drawable?>>(Pair(false, null)) }
+
+    val context = LocalContext.current
+    val scope = rememberCoroutineScope()
+
+    LaunchedEffect(Unit) {
+        scope.launch(Dispatchers.IO) {
+            try {
+                val request = ImageRequest.Builder(context).data(thumbUri).build()
+                val myCover = context.imageLoader.execute(request).drawable
+                if (myCover != null) {
+                    loadingFinished = Pair(true, myCover)
+                } else {
+                    loadingFinished = Pair(true, null)
+                }
+            } catch (e: Exception) {
+                Log.e("VideoView", "Fail to load cover $thumbUri", e)
+                loadingFinished = Pair(true, null)
+            }
+        }
+    }
+
+    if (loadingFinished.first) {
+        if (loadingFinished.second != null) {
+            VideoView(Uri.parse(videoUri), description, loadingFinished.second, onDialog)
+        } else {
+            VideoView(videoUri, description, onDialog)
+        }
+    }
+}
+
+@Composable
+fun VideoView(videoUri: Uri, description: String? = null, thumb: Drawable? = null, onDialog: ((Boolean) -> Unit)? = null) {
     val context = LocalContext.current
     val lifecycleOwner = rememberUpdatedState(LocalLifecycleOwner.current)
 
+    println("loading audio with artwork $thumb")
+
     val exoPlayer = remember(videoUri) {
         val mediaBuilder = MediaItem.Builder().setUri(videoUri)
 
@@ -89,7 +131,7 @@ fun VideoView(videoUri: Uri, description: String? = null, onDialog: ((Boolean) -
 
         ExoPlayer.Builder(context).build().apply {
             repeatMode = Player.REPEAT_MODE_ALL
-            videoScalingMode = C.VIDEO_SCALING_MODE_SCALE_TO_FIT_WITH_CROPPING
+            videoScalingMode = C.VIDEO_SCALING_MODE_SCALE_TO_FIT
             volume = 0f
             if (videoUri.scheme?.startsWith("file") == true) {
                 setMediaItem(media)
@@ -116,9 +158,9 @@ fun VideoView(videoUri: Uri, description: String? = null, onDialog: ((Boolean) -
                     .defaultMinSize(minHeight = 70.dp)
                     .align(Alignment.Center)
                     .onVisibilityChanges { visible ->
-                        if (visible) {
+                        if (visible && !exoPlayer.isPlaying) {
                             exoPlayer.play()
-                        } else {
+                        } else if (!visible && exoPlayer.isPlaying) {
                             exoPlayer.pause()
                         }
                     },
@@ -130,6 +172,7 @@ fun VideoView(videoUri: Uri, description: String? = null, onDialog: ((Boolean) -
                             ViewGroup.LayoutParams.WRAP_CONTENT
                         )
                         controllerAutoShow = false
+                        thumb?.let { defaultArtwork = thumb }
                         hideController()
                         resizeMode = if (maxHeight.isFinite) AspectRatioFrameLayout.RESIZE_MODE_FIT else AspectRatioFrameLayout.RESIZE_MODE_FIXED_WIDTH
                         onDialog?.let { innerOnDialog ->
@@ -146,7 +189,6 @@ fun VideoView(videoUri: Uri, description: String? = null, onDialog: ((Boolean) -
                 muted.value = !muted.value
             }
         }
-
     ) {
         val observer = LifecycleEventObserver { _, event ->
             when (event) {
@@ -175,7 +217,10 @@ fun Modifier.onVisibilityChanges(onVisibilityChanges: (Boolean) -> Unit): Modifi
     }
 
     onGloballyPositioned { coordinates ->
-        isVisible = coordinates.isCompletelyVisible(view)
+        val newIsVisible = coordinates.isCompletelyVisible(view)
+        if (isVisible != newIsVisible) {
+            isVisible = newIsVisible
+        }
     }
 }
 

app/src/main/java/com/vitorpamplona/amethyst/ui/components/ZoomableContentView.kt

@@ -17,9 +17,11 @@ import androidx.compose.foundation.layout.aspectRatio
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.heightIn
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.layout.widthIn
 import androidx.compose.foundation.pager.PagerState
 import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.foundation.shape.RoundedCornerShape
@@ -209,17 +211,21 @@ private fun LocalImageView(
         mutableStateOf<AsyncImagePainter.State?>(null)
     }
 
-    val ratio = remember {
-        aspectRatio(content.dim)
-    }
-
     BoxWithConstraints(contentAlignment = Alignment.Center) {
-        val myModifier = mainImageModifier.also {
-            if (ratio != null) {
-                it.aspectRatio(ratio, maxHeight.isFinite)
-            }
+        val myModifier = remember {
+            mainImageModifier
+                .widthIn(max = maxWidth)
+                .heightIn(max = maxHeight)
+                .run {
+                    aspectRatio(content.dim)?.let { ratio ->
+                        this.aspectRatio(ratio, false)
+                    } ?: this
+                }
+        }
+
+        val contentScale = remember {
+            if (maxHeight.isFinite) ContentScale.Fit else ContentScale.FillWidth
         }
-        val contentScale = if (maxHeight.isFinite) ContentScale.Fit else ContentScale.FillWidth
 
         if (content.localFile != null && content.localFile.exists()) {
             AsyncImage(
@@ -280,12 +286,20 @@ private fun UrlImageView(
     }
 
     BoxWithConstraints(contentAlignment = Alignment.Center) {
-        val myModifier = mainImageModifier.run {
-            aspectRatio(content.dim)?.let { ratio ->
-                this.aspectRatio(ratio, maxHeight.isFinite)
-            } ?: this
+        val myModifier = remember {
+            mainImageModifier
+                .widthIn(max = maxWidth)
+                .heightIn(max = maxHeight)
+                .run {
+                    aspectRatio(content.dim)?.let { ratio ->
+                        this.aspectRatio(ratio, false)
+                    } ?: this
+                }
+        }
+
+        val contentScale = remember {
+            if (maxHeight.isFinite) ContentScale.Fit else ContentScale.FillWidth
         }
-        val contentScale = if (maxHeight.isFinite) ContentScale.Fit else ContentScale.FillWidth
 
         AsyncImage(
             model = content.url,

app/src/main/java/com/vitorpamplona/amethyst/ui/dal/GlobalFeedFilter.kt

@@ -27,7 +27,7 @@ object GlobalFeedFilter : AdditiveFeedFilter<Note>() {
         return collection
             .asSequence()
             .filter {
-                it.event is BaseTextNoteEvent && it.replyTo.isNullOrEmpty()
+                (it.event is BaseTextNoteEvent || it.event is AudioTrackEvent) && it.replyTo.isNullOrEmpty()
             }
             .filter {
                 val channel = it.channelHex()

app/src/main/java/com/vitorpamplona/amethyst/ui/dal/HomeNewThreadFeedFilter.kt

@@ -3,6 +3,7 @@ package com.vitorpamplona.amethyst.ui.dal
 import com.vitorpamplona.amethyst.model.Account
 import com.vitorpamplona.amethyst.model.LocalCache
 import com.vitorpamplona.amethyst.model.Note
+import com.vitorpamplona.amethyst.service.model.AudioTrackEvent
 import com.vitorpamplona.amethyst.service.model.HighlightEvent
 import com.vitorpamplona.amethyst.service.model.LongTextNoteEvent
 import com.vitorpamplona.amethyst.service.model.PollNoteEvent
@@ -30,7 +31,7 @@ object HomeNewThreadFeedFilter : AdditiveFeedFilter<Note>() {
         return collection
             .asSequence()
             .filter { it ->
-                (it.event is TextNoteEvent || it.event is RepostEvent || it.event is LongTextNoteEvent || it.event is PollNoteEvent || it.event is HighlightEvent) &&
+                (it.event is TextNoteEvent || it.event is RepostEvent || it.event is LongTextNoteEvent || it.event is PollNoteEvent || it.event is HighlightEvent || it.event is AudioTrackEvent) &&
                     (it.author?.pubkeyHex in followingKeySet || (it.event?.isTaggedHashes(followingTagSet) ?: false)) &&
                     // && account.isAcceptable(it)  // This filter follows only. No need to check if acceptable
                     it.author?.let { !account.isHidden(it.pubkeyHex) } ?: true &&

app/src/main/java/com/vitorpamplona/amethyst/ui/note/NoteCompose.kt

@@ -66,6 +66,7 @@ import androidx.compose.ui.platform.LocalUriHandler
 import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.AnnotatedString
+import androidx.compose.ui.text.capitalize
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.text.style.TextOverflow
@@ -87,6 +88,7 @@ import com.vitorpamplona.amethyst.model.LocalCache
 import com.vitorpamplona.amethyst.model.Note
 import com.vitorpamplona.amethyst.model.NoteState
 import com.vitorpamplona.amethyst.model.User
+import com.vitorpamplona.amethyst.service.model.AudioTrackEvent
 import com.vitorpamplona.amethyst.service.model.BadgeAwardEvent
 import com.vitorpamplona.amethyst.service.model.BadgeDefinitionEvent
 import com.vitorpamplona.amethyst.service.model.ChannelCreateEvent
@@ -97,6 +99,7 @@ import com.vitorpamplona.amethyst.service.model.FileHeaderEvent
 import com.vitorpamplona.amethyst.service.model.FileStorageHeaderEvent
 import com.vitorpamplona.amethyst.service.model.HighlightEvent
 import com.vitorpamplona.amethyst.service.model.LongTextNoteEvent
+import com.vitorpamplona.amethyst.service.model.Participant
 import com.vitorpamplona.amethyst.service.model.PeopleListEvent
 import com.vitorpamplona.amethyst.service.model.PollNoteEvent
 import com.vitorpamplona.amethyst.service.model.PrivateDmEvent
@@ -113,6 +116,7 @@ import com.vitorpamplona.amethyst.ui.components.RobohashAsyncImage
 import com.vitorpamplona.amethyst.ui.components.RobohashAsyncImageProxy
 import com.vitorpamplona.amethyst.ui.components.RobohashFallbackAsyncImage
 import com.vitorpamplona.amethyst.ui.components.TranslatableRichTextViewer
+import com.vitorpamplona.amethyst.ui.components.VideoView
 import com.vitorpamplona.amethyst.ui.components.ZoomableContent
 import com.vitorpamplona.amethyst.ui.components.ZoomableContentView
 import com.vitorpamplona.amethyst.ui.components.ZoomableLocalImage
@@ -132,6 +136,7 @@ import nostr.postr.toNpub
 import java.io.File
 import java.math.BigDecimal
 import java.net.URL
+import java.util.Locale
 import kotlin.time.ExperimentalTime
 import kotlin.time.measureTimedValue
 
@@ -376,6 +381,10 @@ fun NoteComposeInner(
                                 RenderPeopleList(noteState, backgroundColor, accountViewModel, navController)
                             }
 
+                            is AudioTrackEvent -> {
+                                RenderAudioTrack(note, loggedIn, accountViewModel, navController)
+                            }
+
                             is PrivateDmEvent -> {
                                 RenderPrivateMessage(note, makeItShort, isAcceptableAndCanPreview.second, backgroundColor, accountViewModel, navController)
                             }
@@ -868,6 +877,25 @@ private fun RenderRepost(
     }
 }
 
+@Composable
+private fun RenderAudioTrack(
+    note: Note,
+    loggedIn: User,
+    accountViewModel: AccountViewModel,
+    navController: NavController
+) {
+    val noteEvent = note.event as? AudioTrackEvent ?: return
+
+    AudioTrackHeader(noteEvent, note, loggedIn, navController)
+
+    ReactionsRow(note, accountViewModel, navController)
+
+    Divider(
+        modifier = Modifier.padding(top = 10.dp),
+        thickness = 0.25.dp
+    )
+}
+
 @Composable
 private fun RenderLongFormContent(
     note: Note,
@@ -1553,6 +1581,81 @@ fun FileStorageHeaderDisplay(baseNote: Note) {
     }
 }
 
+@Composable
+fun AudioTrackHeader(noteEvent: AudioTrackEvent, note: Note, loggedIn: User, navController: NavController) {
+    val media = remember { noteEvent.media() }
+    val cover = remember { noteEvent.cover() }
+    val subject = remember { noteEvent.subject() }
+    val content = remember { noteEvent.content() }
+    val participants = remember { noteEvent.participants() }
+
+    var participantUsers by remember { mutableStateOf<List<Pair<Participant, User>>>(emptyList()) }
+
+    LaunchedEffect(key1 = participants) {
+        withContext(Dispatchers.IO) {
+            participantUsers = participants.mapNotNull { part -> LocalCache.checkGetOrCreateUser(part.key)?.let { Pair(part, it) } }
+        }
+    }
+
+    Row(modifier = Modifier.padding(top = 5.dp)) {
+        Column(modifier = Modifier.fillMaxWidth(), horizontalAlignment = Alignment.CenterHorizontally) {
+            Row() {
+                subject?.let {
+                    Row(verticalAlignment = Alignment.CenterVertically, modifier = Modifier.padding(top = 5.dp, bottom = 5.dp)) {
+                        Text(
+                            text = it,
+                            fontWeight = FontWeight.Bold,
+                            maxLines = 3,
+                            overflow = TextOverflow.Ellipsis,
+                            modifier = Modifier.fillMaxWidth()
+                        )
+                    }
+                }
+            }
+
+            participantUsers.forEach {
+                Row(
+                    verticalAlignment = Alignment.CenterVertically,
+                    modifier = Modifier.padding(top = 5.dp, start = 10.dp, end = 10.dp).clickable {
+                        navController.navigate("User/${it.second.pubkeyHex}")
+                    }
+                ) {
+                    UserPicture(it.second, loggedIn, 25.dp)
+                    Spacer(Modifier.width(5.dp))
+                    UsernameDisplay(it.second, Modifier.weight(1f))
+                    Spacer(Modifier.width(5.dp))
+                    it.first.role?.let {
+                        Text(
+                            text = it.capitalize(Locale.ROOT),
+                            color = MaterialTheme.colors.onSurface.copy(alpha = 0.32f),
+                            maxLines = 1
+                        )
+                    }
+                }
+            }
+
+            media?.let { media ->
+                Row(
+                    verticalAlignment = Alignment.CenterVertically,
+                    modifier = Modifier.padding(10.dp)
+                ) {
+                    cover?.let { cover ->
+                        VideoView(
+                            videoUri = media,
+                            description = noteEvent.subject(),
+                            thumbUri = cover
+                        )
+                    }
+                        ?: VideoView(
+                            videoUri = media,
+                            noteEvent.subject()
+                        )
+                }
+            }
+        }
+    }
+}
+
 @Composable
 private fun LongFormHeader(noteEvent: LongTextNoteEvent, note: Note, loggedIn: User) {
     Row(

app/src/main/java/com/vitorpamplona/amethyst/ui/screen/ThreadFeedView.kt

@@ -53,6 +53,7 @@ import androidx.navigation.NavController
 import coil.compose.AsyncImage
 import com.vitorpamplona.amethyst.R
 import com.vitorpamplona.amethyst.model.Note
+import com.vitorpamplona.amethyst.service.model.AudioTrackEvent
 import com.vitorpamplona.amethyst.service.model.BadgeDefinitionEvent
 import com.vitorpamplona.amethyst.service.model.HighlightEvent
 import com.vitorpamplona.amethyst.service.model.LongTextNoteEvent
@@ -352,6 +353,8 @@ fun NoteMaster(
                 Column() {
                     if (noteEvent is PeopleListEvent) {
                         DisplayPeopleList(noteState, MaterialTheme.colors.background, accountViewModel, navController)
+                    } else if (noteEvent is AudioTrackEvent) {
+                        AudioTrackHeader(noteEvent, note, account.userProfile(), navController)
                     } else if (noteEvent is HighlightEvent) {
                         DisplayHighlight(
                             noteEvent.quote(),

app/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/SearchScreen.kt

@@ -335,7 +335,7 @@ private fun SearchBar(accountViewModel: AccountViewModel, navController: NavCont
     }
 }
 
-val hashtagSearch = Pattern.compile("(?:\\s|\\A)#([A-Za-z0-9_\\-]+)")
+val hashtagSearch = Pattern.compile("(?:\\s|\\A)#([^\\s!@#\$%^&*()=+./,\\[{\\]};:'\"?><]+)")
 
 fun findHashtags(content: String): List<String> {
     val matcher = hashtagSearch.matcher(content)

app/src/play/java/com/vitorpamplona/amethyst/ui/components/TranslatableRichTextViewer.kt

@@ -14,6 +14,7 @@ import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.Check
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.derivedStateOf
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.livedata.observeAsState
 import androidx.compose.runtime.mutableStateOf
@@ -48,7 +49,7 @@ fun TranslatableRichTextViewer(
     accountViewModel: AccountViewModel,
     navController: NavController
 ) {
-    val translatedTextState = remember {
+    var translatedTextState by remember {
         mutableStateOf(ResultOrError(content, null, null, null))
     }
 
@@ -56,7 +57,7 @@ fun TranslatableRichTextViewer(
     var langSettingsPopupExpanded by remember { mutableStateOf(false) }
 
     val accountState by accountViewModel.accountLanguagesLiveData.observeAsState()
-    val account = accountState?.account ?: return
+    val account = remember(accountState) { accountState?.account } ?: return
 
     val scope = rememberCoroutineScope()
 
@@ -72,13 +73,17 @@ fun TranslatableRichTextViewer(
                         val preference = account.preferenceBetween(task.result.sourceLang!!, task.result.targetLang!!)
                         showOriginal = preference == task.result.sourceLang
                     }
-                    translatedTextState.value = task.result
+                    translatedTextState = task.result
                 }
             }
         }
     }
 
-    val toBeViewed = if (showOriginal) content else translatedTextState.value.result ?: content
+    val toBeViewed by remember {
+        derivedStateOf {
+            if (showOriginal) content else translatedTextState.result ?: content
+        }
+    }
 
     Column() {
         ExpandableRichTextViewer(
@@ -91,8 +96,8 @@ fun TranslatableRichTextViewer(
             navController
         )
 
-        val target = translatedTextState.value.targetLang
-        val source = translatedTextState.value.sourceLang
+        val target = translatedTextState.targetLang
+        val source = translatedTextState.sourceLang
 
         if (source != null && target != null) {
             if (source != target) {