Version v0.4

app/build.gradle

@@ -11,8 +11,8 @@ android {
         applicationId "com.vitorpamplona.amethyst"
         minSdk 26
         targetSdk 33
-        versionCode 2
-        versionName "0.2"
+        versionCode 4
+        versionName "0.4"
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         vectorDrawables {
@@ -90,7 +90,13 @@ dependencies {
 
     // link preview
     implementation 'tw.com.oneup.www:Baha-UrlPreview:1.0.1'
-    implementation 'androidx.security:security-crypto-ktx:1.1.0-alpha03'
+    implementation 'androidx.security:security-crypto-ktx:1.1.0-alpha04'
+
+    // upload pictures:
+    implementation "com.google.accompanist:accompanist-permissions:0.28.0"
+
+    // view videos
+    implementation 'com.google.android.exoplayer:exoplayer:2.18.2'
 
     testImplementation 'junit:junit:4.13.2'
     androidTestImplementation 'androidx.test.ext:junit:1.1.5'

app/src/main/AndroidManifest.xml

@@ -3,6 +3,7 @@
     xmlns:tools="http://schemas.android.com/tools">
 
     <uses-permission android:name="android.permission.INTERNET"/>
+    <uses-permission android:name="android.permission.READ_MEDIA_IMAGES"/>
 
     <application
         android:allowBackup="true"

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

@@ -3,6 +3,7 @@ package com.vitorpamplona.amethyst.model
 import com.vitorpamplona.amethyst.ui.note.toDisplayHex
 import fr.acinq.secp256k1.Hex
 import java.util.regex.Pattern
+import nostr.postr.Bech32
 import nostr.postr.Persona
 import nostr.postr.bechToBytes
 import nostr.postr.toHex
@@ -10,6 +11,8 @@ import nostr.postr.toHex
 /** Makes the distinction between String and Hex **/
 typealias HexKey = String
 
+fun ByteArray.toNote() = Bech32.encodeBytes(hrp = "note", this, Bech32.Encoding.Bech32)
+
 fun ByteArray.toHexKey(): HexKey {
   return toHex()
 }

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

@@ -2,6 +2,7 @@ package com.vitorpamplona.amethyst.model
 
 import android.util.Log
 import androidx.lifecycle.LiveData
+import com.baha.url.preview.UrlInfoItem
 import com.fasterxml.jackson.databind.DeserializationFeature
 import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
 import com.vitorpamplona.amethyst.service.model.ReactionEvent
@@ -103,6 +104,8 @@ object LocalCache {
       it.addReply(note)
     }
 
+    UrlCachedPreviewer.preloadPreviewsFor(note)
+
     refreshObservers()
   }
 

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

@@ -1,6 +1,7 @@
 package com.vitorpamplona.amethyst.model
 
 import androidx.lifecycle.LiveData
+import com.baha.url.preview.UrlInfoItem
 import com.vitorpamplona.amethyst.service.NostrSingleEventDataSource
 import com.vitorpamplona.amethyst.ui.note.toDisplayHex
 import fr.acinq.secp256k1.Hex
@@ -11,14 +12,19 @@ import java.util.Collections
 import nostr.postr.events.Event
 
 class Note(val idHex: String) {
+    // These fields are always available.
+    // They are immutable
     val id = Hex.decode(idHex)
     val idDisplayHex = id.toDisplayHex()
 
+    // These fields are only available after the Text Note event is received.
+    // They are immutable after that.
     var event: Event? = null
     var author: User? = null
     var mentions: List<User>? = null
     var replyTo: MutableList<Note>? = null
 
+    // These fields are updated every time an event related to this note is received.
     val replies = Collections.synchronizedSet(mutableSetOf<Note>())
     val reactions = Collections.synchronizedSet(mutableSetOf<Note>())
     val boosts = Collections.synchronizedSet(mutableSetOf<Note>())

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

@@ -0,0 +1,55 @@
+package com.vitorpamplona.amethyst.model
+
+import com.baha.url.preview.BahaUrlPreview
+import com.baha.url.preview.IUrlPreviewCallback
+import com.baha.url.preview.UrlInfoItem
+import com.vitorpamplona.amethyst.ui.components.imageExtension
+import com.vitorpamplona.amethyst.ui.components.isValidURL
+import com.vitorpamplona.amethyst.ui.components.noProtocolUrlValidator
+import com.vitorpamplona.amethyst.ui.components.videoExtension
+import java.util.concurrent.ConcurrentHashMap
+
+object UrlCachedPreviewer {
+  val cache = ConcurrentHashMap<String, UrlInfoItem>()
+
+  fun previewInfo(url: String, callback: IUrlPreviewCallback? = null) {
+    cache[url]?.let {
+      callback?.onComplete(it)
+      return
+    }
+
+    BahaUrlPreview(url, object : IUrlPreviewCallback {
+      override fun onComplete(urlInfo: UrlInfoItem) {
+        cache.put(url, urlInfo)
+        callback?.onComplete(urlInfo)
+      }
+
+      override fun onFailed(throwable: Throwable) {
+        callback?.onFailed(throwable)
+      }
+    }).fetchUrlPreview()
+  }
+
+  fun findUrlsInMessage(message: String): List<String> {
+    return message.split('\n').map { paragraph ->
+      paragraph.split(' ').filter { word: String ->
+        isValidURL(word) || noProtocolUrlValidator.matcher(word).matches()
+      }
+    }.flatten()
+  }
+
+  fun preloadPreviewsFor(note: Note) {
+    note.event?.content?.let {
+      findUrlsInMessage(it).forEach {
+        val removedParamsFromUrl = it.split("?")[0].toLowerCase()
+        if (imageExtension.matcher(removedParamsFromUrl).matches()) {
+          // Preload Images? Isn't this too heavy?
+        } else if (videoExtension.matcher(removedParamsFromUrl).matches()) {
+          // Do nothing for now.
+        } else {
+          previewInfo(it)
+        }
+      }
+    }
+  }
+}

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

@@ -31,7 +31,7 @@ object NostrAccountDataSource: NostrDataSource("AccountData") {
   fun createAccountFilter(): JsonFilter {
     return JsonFilter(
       authors = listOf(account.userProfile().pubkeyHex),
-      since = System.currentTimeMillis() / 1000 - (60 * 60 * 24 * 4), // 4 days
+      since = System.currentTimeMillis() / 1000 - (60 * 60 * 24 * 7), // 4 days
     )
   }
 

app/src/main/java/com/vitorpamplona/amethyst/ui/MainActivity.kt

@@ -8,6 +8,7 @@ import androidx.compose.material.MaterialTheme
 import androidx.compose.material.Surface
 import androidx.compose.ui.Modifier
 import androidx.lifecycle.viewmodel.compose.viewModel
+import com.google.android.exoplayer2.util.Util
 import com.vitorpamplona.amethyst.KeyStorage
 import com.vitorpamplona.amethyst.service.NostrAccountDataSource
 import com.vitorpamplona.amethyst.service.NostrGlobalDataSource

app/src/main/java/com/vitorpamplona/amethyst/ui/actions/ImageUploader.kt

@@ -0,0 +1,57 @@
+package com.vitorpamplona.amethyst.ui.actions
+
+import android.graphics.Bitmap
+import com.fasterxml.jackson.module.kotlin.jacksonObjectMapper
+import java.io.ByteArrayOutputStream
+import java.io.IOException
+import java.util.UUID
+import okhttp3.Call
+import okhttp3.Callback
+import okhttp3.MediaType.Companion.toMediaType
+import okhttp3.MultipartBody
+import okhttp3.OkHttpClient
+import okhttp3.Request
+import okhttp3.RequestBody
+import okhttp3.RequestBody.Companion.toRequestBody
+import okhttp3.Response
+
+object ImageUploader {
+  private fun encodeImage(bitmap: Bitmap): ByteArray {
+    val byteArrayOutPutStream = ByteArrayOutputStream()
+    bitmap.compress(Bitmap.CompressFormat.JPEG, 100, byteArrayOutPutStream)
+    return byteArrayOutPutStream.toByteArray()
+  }
+
+  fun uploadImage(bitmap: Bitmap, onSuccess: (String) -> Unit) {
+    val client = OkHttpClient.Builder().build()
+
+    val body: RequestBody = MultipartBody.Builder()
+      .setType(MultipartBody.FORM)
+      .addFormDataPart(
+        "image",
+        "${UUID.randomUUID()}.png",
+        encodeImage(bitmap).toRequestBody("image/png".toMediaType())
+      )
+      .build()
+
+    val request: Request = Request.Builder()
+      .url("https://api.imgur.com/3/image")
+      .header("Authorization", "Client-ID e6aea87296f3f96")
+      .post(body)
+      .build()
+
+    client.newCall(request).enqueue(object : Callback {
+      override fun onResponse(call: Call, response: Response) {
+        response.use {
+          val tree = jacksonObjectMapper().readTree(response.body!!.string())
+          val url = tree.get("data").get("link").asText()
+          onSuccess(url)
+        }
+      }
+
+      override fun onFailure(call: Call, e: IOException) {
+        e.printStackTrace()
+      }
+    })
+  }
+}

app/src/main/java/com/vitorpamplona/amethyst/ui/actions/NewPostView.kt

@@ -17,48 +17,73 @@ import androidx.compose.material.Surface
 import androidx.compose.material.Text
 import androidx.compose.material.TextFieldDefaults
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
+import androidx.compose.ui.ExperimentalComposeUiApi
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.focus.FocusRequester
+import androidx.compose.ui.focus.focusRequester
+import androidx.compose.ui.focus.onFocusChanged
 import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.layout.ContentScale
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.platform.LocalSoftwareKeyboardController
 import androidx.compose.ui.text.input.KeyboardCapitalization
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import androidx.compose.ui.window.Dialog
 import androidx.compose.ui.window.DialogProperties
-import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewmodel.compose.viewModel
+import coil.compose.AsyncImage
+import com.google.accompanist.flowlayout.FlowRow
 import com.vitorpamplona.amethyst.model.Account
 import com.vitorpamplona.amethyst.model.Note
+import com.vitorpamplona.amethyst.ui.components.TagLink
+import com.vitorpamplona.amethyst.ui.components.UrlPreview
+import com.vitorpamplona.amethyst.ui.components.imageExtension
+import com.vitorpamplona.amethyst.ui.components.isValidURL
+import com.vitorpamplona.amethyst.ui.components.noProtocolUrlValidator
+import com.vitorpamplona.amethyst.ui.components.tagIndex
+import com.vitorpamplona.amethyst.ui.navigation.UploadFromGallery
+import kotlinx.coroutines.delay
 import nostr.postr.events.TextNoteEvent
 
-class PostViewModel: ViewModel() {
-    var account: Account? = null
-    var message by mutableStateOf("")
-    var replyingTo: Note? = null
-
-    fun sendPost() {
-        account?.sendPost(message, replyingTo)
-    }
-}
 
+@OptIn(ExperimentalComposeUiApi::class)
 @Composable
 fun NewPostView(onClose: () -> Unit, replyingTo: Note? = null, account: Account) {
-    val postViewModel: PostViewModel = viewModel<PostViewModel>().apply {
+    val postViewModel: NewPostViewModel = viewModel<NewPostViewModel>().apply {
         this.replyingTo = replyingTo
         this.account = account
     }
 
-    val dialogProperties = DialogProperties()
+    val context = LocalContext.current
+
+    // initialize focus reference to be able to request focus programmatically
+    val focusRequester = FocusRequester()
+    val keyboardController = LocalSoftwareKeyboardController.current
+
+    LaunchedEffect(Unit) {
+        delay(100)
+        focusRequester.requestFocus()
+    }
+
     Dialog(
-        onDismissRequest = { onClose() }, properties = dialogProperties
+        onDismissRequest = { onClose() },
+        properties = DialogProperties(
+            usePlatformDefaultWidth = false,
+            dismissOnClickOutside = false
+        )
     ) {
         Surface(
             modifier = Modifier
                 .fillMaxWidth()
-                .fillMaxHeight(0.5f)
+                .fillMaxHeight()
         ) {
             Column(
                 modifier = Modifier.padding(10.dp)
@@ -69,7 +94,14 @@ fun NewPostView(onClose: () -> Unit, replyingTo: Note? = null, account: Account)
                     horizontalArrangement = Arrangement.SpaceBetween,
                     verticalAlignment = Alignment.CenterVertically
                 ) {
-                    CloseButton(onCancel = onClose)
+                    CloseButton(onCancel = {
+                        postViewModel.cancel()
+                        onClose()
+                    })
+
+                    UploadFromGallery {
+                        postViewModel.upload(it, context)
+                    }
 
                     PostButton(
                         onPost = {
@@ -96,16 +128,26 @@ fun NewPostView(onClose: () -> Unit, replyingTo: Note? = null, account: Account)
 
                 OutlinedTextField(
                     value = postViewModel.message,
-                    onValueChange = { postViewModel.message = it },
+                    onValueChange = {
+                        postViewModel.message = it
+                        postViewModel.urlPreview = postViewModel.findUrlInMessage()
+                    },
                     keyboardOptions = KeyboardOptions.Default.copy(
                         capitalization = KeyboardCapitalization.Sentences
                     ),
-                    modifier = Modifier.fillMaxWidth().fillMaxHeight()
+                    modifier = Modifier
+                        .fillMaxWidth()
                         .border(
                             width = 1.dp,
                             color = MaterialTheme.colors.surface,
                             shape = RoundedCornerShape(8.dp)
-                        ),
+                        )
+                        .focusRequester(focusRequester)
+                        .onFocusChanged {
+                            if (it.isFocused) {
+                                keyboardController?.show()
+                            }
+                        },
                     placeholder = {
                         Text(
                             text = "What's on your mind?",
@@ -117,8 +159,32 @@ fun NewPostView(onClose: () -> Unit, replyingTo: Note? = null, account: Account)
                             unfocusedBorderColor = Color.Transparent,
                             focusedBorderColor = Color.Transparent
                         )
-
                 )
+
+                val myUrlPreview = postViewModel.urlPreview
+                if (myUrlPreview != null) {
+                    Column(modifier = Modifier.padding(top = 5.dp)) {
+                        val removedParamsFromUrl = myUrlPreview.split("?")[0].toLowerCase()
+                        if (imageExtension.matcher(removedParamsFromUrl).matches()) {
+                            AsyncImage(
+                                model = myUrlPreview,
+                                contentDescription = myUrlPreview,
+                                contentScale = ContentScale.FillWidth,
+                                modifier = Modifier
+                                    .padding(top = 4.dp)
+                                    .fillMaxWidth()
+                                    .clip(shape = RoundedCornerShape(15.dp))
+                                    .border(
+                                        1.dp,
+                                        MaterialTheme.colors.onSurface.copy(alpha = 0.12f),
+                                        RoundedCornerShape(15.dp)
+                                    )
+                            )
+                        } else {
+                            UrlPreview("https://$myUrlPreview", myUrlPreview, false)
+                        }
+                    }
+                }
             }
         }
     }

app/src/main/java/com/vitorpamplona/amethyst/ui/actions/NewPostViewModel.kt

@@ -0,0 +1,58 @@
+package com.vitorpamplona.amethyst.ui.actions
+
+import android.content.Context
+import android.graphics.ImageDecoder
+import android.net.Uri
+import android.os.Build
+import android.provider.MediaStore
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.lifecycle.ViewModel
+import com.vitorpamplona.amethyst.model.Account
+import com.vitorpamplona.amethyst.model.Note
+import com.vitorpamplona.amethyst.ui.components.isValidURL
+import com.vitorpamplona.amethyst.ui.components.noProtocolUrlValidator
+
+class NewPostViewModel: ViewModel() {
+    var account: Account? = null
+    var replyingTo: Note? = null
+
+    var message by mutableStateOf("")
+    var urlPreview by mutableStateOf<String?>(null)
+
+    fun sendPost() {
+        account?.sendPost(message, replyingTo)
+        message = ""
+        urlPreview = null
+    }
+
+    fun upload(it: Uri, context: Context) {
+        val img = if (Build.VERSION.SDK_INT < 28) {
+            MediaStore.Images.Media.getBitmap(context.contentResolver, it)
+        } else {
+            ImageDecoder.decodeBitmap(ImageDecoder.createSource(context.contentResolver, it))
+        }
+
+        img?.let {
+            ImageUploader.uploadImage(img) {
+                message = message + "\n\n" + it
+                urlPreview = findUrlInMessage()
+            }
+        }
+    }
+
+    fun cancel() {
+        message = ""
+        urlPreview = null
+    }
+
+    fun findUrlInMessage(): String? {
+        return message.split('\n').firstNotNullOfOrNull { paragraph ->
+            paragraph.split(' ').firstOrNull { word: String ->
+                isValidURL(word) || noProtocolUrlValidator.matcher(word).matches()
+            }
+        }
+    }
+}

app/src/main/java/com/vitorpamplona/amethyst/ui/actions/UploadFromGallery.kt

@@ -0,0 +1,85 @@
+package com.vitorpamplona.amethyst.ui.navigation
+
+import android.net.Uri
+import androidx.activity.compose.rememberLauncherForActivityResult
+import androidx.activity.result.contract.ActivityResultContracts
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material.Button
+import androidx.compose.material.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.SideEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.dp
+import com.google.accompanist.permissions.ExperimentalPermissionsApi
+import com.google.accompanist.permissions.isGranted
+import com.google.accompanist.permissions.rememberPermissionState
+import com.google.accompanist.permissions.shouldShowRationale
+
+@OptIn(ExperimentalPermissionsApi::class)
+@Composable
+fun UploadFromGallery(onImageChosen: (Uri) -> Unit) {
+    val cameraPermissionState = rememberPermissionState(
+        android.Manifest.permission.READ_MEDIA_IMAGES
+    )
+
+    if (cameraPermissionState.status.isGranted) {
+        var showGallerySelect by remember { mutableStateOf(false) }
+        if (showGallerySelect) {
+            GallerySelect(
+                onImageUri = { uri ->
+                    showGallerySelect = false
+                    if (uri != null)
+                        onImageChosen(uri)
+                }
+            )
+        } else {
+            Box() {
+                Button(
+                    modifier = Modifier
+                        .align(Alignment.TopCenter)
+                        .padding(4.dp),
+                    onClick = {
+                        showGallerySelect = true
+                    }
+                ) {
+                    Text("Add Image from Gallery")
+                }
+            }
+        }
+    } else {
+        Column {
+            Button(onClick = { cameraPermissionState.launchPermissionRequest() }) {
+                Text("Add Image from Gallery")
+            }
+        }
+    }
+}
+
+
+@Composable
+fun GallerySelect(
+    onImageUri: (Uri?) -> Unit = { }
+) {
+    val launcher = rememberLauncherForActivityResult(
+        contract = ActivityResultContracts.GetContent(),
+        onResult = { uri: Uri? ->
+            onImageUri(uri)
+        }
+    )
+
+    @Composable
+    fun LaunchGallery() {
+        SideEffect {
+            launcher.launch("image/*")
+        }
+    }
+
+    LaunchGallery()
+}

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

@@ -0,0 +1,101 @@
+package com.vitorpamplona.amethyst.ui.components
+
+import android.content.Intent
+import android.net.Uri
+import androidx.compose.foundation.border
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.aspectRatio
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material.Button
+import androidx.compose.material.ButtonDefaults
+import androidx.compose.material.Divider
+import androidx.compose.material.Icon
+import androidx.compose.material.MaterialTheme
+import androidx.compose.material.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.painterResource
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import androidx.core.content.ContextCompat.startActivity
+import com.vitorpamplona.amethyst.R
+
+@Composable
+fun InvoicePreview(lnInvoice: String) {
+  val amount = LnInvoiceUtil.getAmountInSats(lnInvoice)
+
+  val context = LocalContext.current
+
+  Column(modifier = Modifier
+    .fillMaxWidth()
+    .padding(start = 30.dp, end = 30.dp)
+    .clip(shape = RoundedCornerShape(10.dp))
+    .border(1.dp, MaterialTheme.colors.onSurface.copy(alpha = 0.12f), RoundedCornerShape(15.dp))
+  ) {
+
+    Column(
+      modifier = Modifier
+        .fillMaxWidth()
+        .padding(30.dp)
+    ) {
+
+      Row(
+        verticalAlignment = Alignment.CenterVertically,
+        modifier = Modifier
+          .fillMaxWidth()
+          .padding(bottom = 10.dp)
+      ) {
+        Icon(
+          painter = painterResource(R.drawable.lightning),
+          null,
+          modifier = Modifier.size(20.dp),
+          tint = Color.Unspecified
+        )
+
+        Text(
+          text = "Lightning Invoice",
+          fontSize = 20.sp,
+          fontWeight = FontWeight.W500,
+          modifier = Modifier.padding(start = 10.dp)
+        )
+      }
+
+      Divider()
+
+      Text(
+        text = "${amount.toInt()} sats",
+        fontSize = 25.sp,
+        fontWeight = FontWeight.W500,
+        modifier = Modifier
+          .fillMaxWidth()
+          .padding(vertical = 10.dp),
+      )
+
+      Button(
+        modifier = Modifier.fillMaxWidth().padding(vertical = 10.dp),
+        onClick = {
+          runCatching {
+            val intent = Intent(Intent.ACTION_VIEW, Uri.parse("lightning://$lnInvoice"))
+            startActivity(context, intent, null)
+          }
+        },
+        shape = RoundedCornerShape(15.dp),
+        colors = ButtonDefaults.buttonColors(
+          backgroundColor = MaterialTheme.colors.primary
+        )
+      ) {
+        Text(text = "Pay", color = Color.White, fontSize = 20.sp)
+      }
+    }
+  }
+}

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

@@ -0,0 +1,156 @@
+package com.vitorpamplona.amethyst.ui.components
+
+import java.math.BigDecimal
+import java.util.Locale
+import java.util.regex.Pattern
+
+/** based on litecoinj */
+object LnInvoiceUtil {
+  private val invoicePattern = Pattern.compile("lnbc((?<amount>\\d+)(?<multiplier>[munp])?)?1[^1\\s]+")
+
+  /** The Bech32 character set for encoding.  */
+  private const val CHARSET = "qpzry9x8gf2tvdw0s3jn54khce6mua7l"
+
+  /** The Bech32 character set for decoding.  */
+  private val CHARSET_REV = byteArrayOf(
+    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+    -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+    15, -1, 10, 17, 21, 20, 26, 30, 7, 5, -1, -1, -1, -1, -1, -1,
+    -1, 29, -1, 24, 13, 25, 9, 8, 23, -1, 18, 22, 31, 27, 19, -1,
+    1, 0, 3, 16, 11, 28, 12, 14, 6, 4, 2, -1, -1, -1, -1, -1,
+    -1, 29, -1, 24, 13, 25, 9, 8, 23, -1, 18, 22, 31, 27, 19, -1,
+    1, 0, 3, 16, 11, 28, 12, 14, 6, 4, 2, -1, -1, -1, -1, -1
+  )
+
+
+  /** Find the polynomial with value coefficients mod the generator as 30-bit.  */
+  private fun polymod(values: ByteArray): Int {
+    var c = 1
+    for (v_i in values) {
+      val c0 = c ushr 25 and 0xff
+      c = c and 0x1ffffff shl 5 xor (v_i.toInt() and 0xff)
+      if (c0 and 1 != 0) c = c xor 0x3b6a57b2
+      if (c0 and 2 != 0) c = c xor 0x26508e6d
+      if (c0 and 4 != 0) c = c xor 0x1ea119fa
+      if (c0 and 8 != 0) c = c xor 0x3d4233dd
+      if (c0 and 16 != 0) c = c xor 0x2a1462b3
+    }
+    return c
+  }
+
+  /** Expand a HRP for use in checksum computation.  */
+  private fun expandHrp(hrp: String): ByteArray {
+    val hrpLength = hrp.length
+    val ret = ByteArray(hrpLength * 2 + 1)
+    for (i in 0 until hrpLength) {
+      val c = hrp[i].code and 0x7f // Limit to standard 7-bit ASCII
+      ret[i] = (c ushr 5 and 0x07).toByte()
+      ret[i + hrpLength + 1] = (c and 0x1f).toByte()
+    }
+    ret[hrpLength] = 0
+    return ret
+  }
+
+  /** Verify a checksum.  */
+  private fun verifyChecksum(hrp: String, values: ByteArray): Boolean {
+    val hrpExpanded: ByteArray = expandHrp(hrp)
+    val combined = ByteArray(hrpExpanded.size + values.size)
+    System.arraycopy(hrpExpanded, 0, combined, 0, hrpExpanded.size)
+    System.arraycopy(values, 0, combined, hrpExpanded.size, values.size)
+    return polymod(combined) == 1
+  }
+
+  class AddressFormatException(message: String): Exception(message) {
+
+  }
+
+  fun decodeUnlimitedLength(invoice: String): Boolean {
+    var lower = false
+    var upper = false
+    for (i in 0 until invoice.length) {
+      val c = invoice[i]
+      if (c.code < 33 || c.code > 126) throw AddressFormatException("Invalid character: $c, pos: $i")
+      if (c in 'a'..'z') {
+        if (upper) throw AddressFormatException("Invalid character: $c, pos: $i")
+        lower = true
+      }
+      if (c in 'A'..'Z') {
+        if (lower) throw AddressFormatException("Invalid character: $c, pos: $i")
+        upper = true
+      }
+    }
+    val pos = invoice.lastIndexOf('1')
+    if (pos < 1) throw AddressFormatException("Missing human-readable part")
+    val dataPartLength = invoice.length - 1 - pos
+    if (dataPartLength < 6) throw AddressFormatException("Data part too short: $dataPartLength")
+    val values = ByteArray(dataPartLength)
+    for (i in 0 until dataPartLength) {
+      val c = invoice[i + pos + 1]
+      if (CHARSET_REV.get(c.code).toInt() == -1) throw AddressFormatException("Invalid character: " + c + ", pos: " + (i + pos + 1))
+      values[i] = CHARSET_REV.get(c.code)
+    }
+    val hrp = invoice.substring(0, pos).lowercase(Locale.ROOT)
+    if (!verifyChecksum(hrp, values)) throw AddressFormatException("Invalid Checksum")
+    return true
+  }
+
+  /**
+   * Parses invoice amount according to
+   * https://github.com/lightningnetwork/lightning-rfc/blob/master/11-payment-encoding.md#human-readable-part
+   * @return invoice amount in bitcoins, zero if the invoice has no amount
+   * @throws RuntimeException if invoice format is incorrect
+   */
+  fun getAmount(invoice: String): BigDecimal {
+    try {
+      decodeUnlimitedLength(invoice) // checksum must match
+    } catch (e: AddressFormatException) {
+      throw IllegalArgumentException("Cannot decode invoice", e)
+    }
+
+    val matcher = invoicePattern.matcher(invoice)
+    require(matcher.matches()) { "Failed to match HRP pattern" }
+    val amountGroup = matcher.group("amount")
+    val multiplierGroup = matcher.group("multiplier")
+    if (amountGroup == null) {
+      return BigDecimal.ZERO
+    }
+    val amount = BigDecimal(amountGroup)
+    if (multiplierGroup == null) {
+      return amount
+    }
+    require(!(multiplierGroup == "p" && amountGroup[amountGroup.length - 1] != '0')) { "sub-millisatoshi amount" }
+    return amount.multiply(multiplier(multiplierGroup))
+  }
+
+  fun getAmountInSats(invoice: String): BigDecimal {
+    return getAmount(invoice).multiply(BigDecimal(100000000))
+  }
+
+  private fun multiplier(multiplier: String): BigDecimal {
+    return when (multiplier) {
+      "m" -> BigDecimal("0.001")
+      "u" -> BigDecimal("0.000001")
+      "n" -> BigDecimal("0.000000001")
+      "p" -> BigDecimal("0.000000000001")
+      else -> throw IllegalArgumentException("Invalid multiplier: $multiplier")
+    }
+  }
+
+  /**
+   * Finds LN invoice in the provided input string and returns it.
+   * For example for input = "aaa bbb lnbc1xxx ccc" it will return "lnbc1xxx"
+   * It will only return the first invoice found in the input.
+   *
+   * @return the invoice if it was found. null for null input or if no invoice is found
+   */
+  fun findInvoice(input: String?): String? {
+    if (input == null) {
+      return null
+    }
+    val matcher = invoicePattern.matcher(input)
+    return if (matcher.find()) {
+      matcher.group()
+    } else null
+  }
+}

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

@@ -1,5 +1,6 @@
 package com.vitorpamplona.amethyst.ui.components
 
+import android.util.Patterns
 import androidx.compose.foundation.border
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.fillMaxWidth
@@ -23,9 +24,14 @@ import java.net.URL
 import java.util.regex.Pattern
 
 val imageExtension = Pattern.compile("(.*/)*.+\\.(png|jpg|gif|bmp|jpeg|webp)$")
+val videoExtension = Pattern.compile("(.*/)*.+\\.(mp4|avi|wmv|mpg|amv|webm)$")
 val noProtocolUrlValidator = Pattern.compile("^[-a-zA-Z0-9@:%._\\+~#=]{1,256}\\.[a-zA-Z0-9()]{1,6}\\b(?:[-a-zA-Z0-9()@:%_\\+.~#?&//=]*)$")
 val tagIndex = Pattern.compile("\\#\\[([0-9]*)\\]")
 
+val mentionsPattern: Pattern = Pattern.compile("@([A-Za-z0-9_-]+)")
+val hashTagsPattern: Pattern = Pattern.compile("#([A-Za-z0-9_-]+)")
+val urlPattern: Pattern = Patterns.WEB_URL
+
 fun isValidURL(url: String?): Boolean {
   return try {
     URL(url).toURI()
@@ -46,7 +52,10 @@ fun RichTextViewer(content: String, tags: List<List<String>>?) {
       FlowRow() {
         paragraph.split(' ').forEach { word: String ->
           // Explicit URL
-          if (isValidURL(word)) {
+          val lnInvoice = LnInvoiceUtil.findInvoice(word)
+          if (lnInvoice != null) {
+            InvoicePreview(lnInvoice)
+          } else if (isValidURL(word)) {
             val removedParamsFromUrl = word.split("?")[0].toLowerCase()
             if (imageExtension.matcher(removedParamsFromUrl).matches()) {
               AsyncImage(
@@ -59,6 +68,8 @@ fun RichTextViewer(content: String, tags: List<List<String>>?) {
                   .clip(shape = RoundedCornerShape(15.dp))
                   .border(1.dp, MaterialTheme.colors.onSurface.copy(alpha = 0.12f), RoundedCornerShape(15.dp))
               )
+            } else if (videoExtension.matcher(removedParamsFromUrl).matches()) {
+              VideoView(word)
             } else {
               UrlPreview(word, word)
             }

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

@@ -31,34 +31,31 @@ import coil.compose.AsyncImage
 import com.baha.url.preview.BahaUrlPreview
 import com.baha.url.preview.IUrlPreviewCallback
 import com.baha.url.preview.UrlInfoItem
+import com.vitorpamplona.amethyst.model.UrlCachedPreviewer
 
 
 @Composable
-fun UrlPreview(url: String, urlText: String) {
+fun UrlPreview(url: String, urlText: String, showUrlIfError: Boolean = true) {
   var urlPreviewState by remember { mutableStateOf<UrlPreviewState>(UrlPreviewState.Loading) }
 
-  // Doesn't use a viewModel because of viewModel reusing issues (too many UrlPreview are created).
-  LaunchedEffect(urlPreviewState) {
-    if (urlPreviewState == UrlPreviewState.Loading) {
-      val urlPreview = BahaUrlPreview(url, object : IUrlPreviewCallback {
-        override fun onComplete(urlInfo: UrlInfoItem) {
-          if (urlInfo.allFetchComplete() && urlInfo.url == url)
-            urlPreviewState = UrlPreviewState.Loaded(urlInfo)
-          else
-            urlPreviewState = UrlPreviewState.Empty
-        }
-
-        override fun onFailed(throwable: Throwable) {
-          urlPreviewState = UrlPreviewState.Error("Error parsing preview for ${url}: ${throwable.message}")
-        }
-      })
-
-      urlPreview.fetchUrlPreview()
-    }
-  }
-
   val uri = LocalUriHandler.current
 
+  // Doesn't use a viewModel because of viewModel reusing issues (too many UrlPreview are created).
+  LaunchedEffect(url) {
+    UrlCachedPreviewer.previewInfo(url, object : IUrlPreviewCallback {
+      override fun onComplete(urlInfo: UrlInfoItem) {
+        if (urlInfo.allFetchComplete() && urlInfo.url == url)
+          urlPreviewState = UrlPreviewState.Loaded(urlInfo)
+        else
+          urlPreviewState = UrlPreviewState.Empty
+      }
+
+      override fun onFailed(throwable: Throwable) {
+        urlPreviewState = UrlPreviewState.Error("Error parsing preview for ${url}: ${throwable.message}")
+      }
+    })
+  }
+
   Crossfade(targetState = urlPreviewState) { state ->
     when (state) {
       is UrlPreviewState.Loaded -> {
@@ -97,11 +94,13 @@ fun UrlPreview(url: String, urlText: String) {
         }
       }
       else -> {
-        ClickableText(
-          text = AnnotatedString("$urlText "),
-          onClick = { runCatching { uri.openUri(url) } },
-          style = LocalTextStyle.current.copy(color = MaterialTheme.colors.primary),
-        )
+        if (showUrlIfError) {
+          ClickableText(
+            text = AnnotatedString("$urlText "),
+            onClick = { runCatching { uri.openUri(url) } },
+            style = LocalTextStyle.current.copy(color = MaterialTheme.colors.primary),
+          )
+        }
       }
     }
   }

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

@@ -0,0 +1,56 @@
+package com.vitorpamplona.amethyst.ui.components
+
+import android.media.browse.MediaBrowser
+import android.view.ViewGroup
+import android.widget.FrameLayout
+import androidx.compose.foundation.layout.IntrinsicSize
+import androidx.compose.foundation.layout.aspectRatio
+import androidx.compose.foundation.layout.fillMaxHeight
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.wrapContentHeight
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.DisposableEffect
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.viewinterop.AndroidView
+import com.google.android.exoplayer2.C
+import com.google.android.exoplayer2.ExoPlayer
+import com.google.android.exoplayer2.MediaItem
+import com.google.android.exoplayer2.Player
+import com.google.android.exoplayer2.ui.AspectRatioFrameLayout
+import com.google.android.exoplayer2.ui.StyledPlayerView
+
+@Composable
+fun VideoView(videoUri: String) {
+  val context = LocalContext.current
+
+  val exoPlayer = ExoPlayer.Builder(LocalContext.current).build().apply {
+    playWhenReady = true
+    repeatMode = Player.REPEAT_MODE_ALL
+    videoScalingMode = C.VIDEO_SCALING_MODE_SCALE_TO_FIT_WITH_CROPPING
+    setMediaItem(MediaItem.fromUri(videoUri))
+    prepare()
+  }
+
+  DisposableEffect(exoPlayer) {
+    onDispose {
+      exoPlayer.release()
+    }
+  }
+
+  AndroidView(
+    modifier = Modifier
+      .fillMaxWidth(),
+    factory = {
+      StyledPlayerView(context).apply {
+        player = exoPlayer
+        layoutParams = FrameLayout.LayoutParams(
+          ViewGroup.LayoutParams.MATCH_PARENT,
+          ViewGroup.LayoutParams.WRAP_CONTENT
+        )
+        resizeMode = AspectRatioFrameLayout.RESIZE_MODE_FIXED_WIDTH
+      }
+    })
+}

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

@@ -40,15 +40,20 @@ import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 import nostr.postr.events.TextNoteEvent
 
 @Composable
-fun BoostSetCompose(likeSetCard: BoostSetCard, modifier: Modifier = Modifier, isInnerNote: Boolean = false, accountViewModel: AccountViewModel, navController: NavController) {
+fun BoostSetCompose(likeSetCard: BoostSetCard, isInnerNote: Boolean = false, accountViewModel: AccountViewModel, navController: NavController) {
     val noteState by likeSetCard.note.live.observeAsState()
     val note = noteState?.note
 
     if (note?.event == null) {
-        BlankNote(modifier, isInnerNote)
+        BlankNote(Modifier, isInnerNote)
     } else {
-        Column(modifier = modifier) {
-            Row(modifier = Modifier.padding(horizontal = if (!isInnerNote) 12.dp else 0.dp)) {
+        Column() {
+            Row(modifier = Modifier
+                .padding(
+                    start = if (!isInnerNote) 12.dp else 0.dp,
+                    end = if (!isInnerNote) 12.dp else 0.dp,
+                    top = 10.dp)
+            ) {
 
                 // Draws the like picture outside the boosted card.
                 if (!isInnerNote) {

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

@@ -44,10 +44,15 @@ fun LikeSetCompose(likeSetCard: LikeSetCard, modifier: Modifier = Modifier, isIn
     val note = noteState?.note
 
     if (note?.event == null) {
-        BlankNote(modifier, isInnerNote)
+        BlankNote(Modifier, isInnerNote)
     } else {
         Column(modifier = modifier) {
-            Row(modifier = Modifier.padding(horizontal = if (!isInnerNote) 12.dp else 0.dp)) {
+            Row(                modifier = Modifier
+                .padding(
+                    start = if (!isInnerNote) 12.dp else 0.dp,
+                    end = if (!isInnerNote) 12.dp else 0.dp,
+                    top = 10.dp)
+            ) {
 
                 // Draws the like picture outside the boosted card.
                 if (!isInnerNote) {

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

@@ -1,10 +1,11 @@
 package com.vitorpamplona.amethyst.ui.note
 
-import android.text.format.DateUtils
 import android.text.format.DateUtils.getRelativeTimeSpanString
+import androidx.compose.foundation.ExperimentalFoundationApi
 import androidx.compose.foundation.background
 import androidx.compose.foundation.border
 import androidx.compose.foundation.clickable
+import androidx.compose.foundation.combinedClickable
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
@@ -12,45 +13,62 @@ import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.width
 import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.material.Divider
+import androidx.compose.material.DropdownMenu
+import androidx.compose.material.DropdownMenuItem
 import androidx.compose.material.MaterialTheme
 import androidx.compose.material.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.livedata.observeAsState
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
+import androidx.compose.ui.platform.LocalClipboardManager
+import androidx.compose.ui.text.AnnotatedString
 import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.DpOffset
 import androidx.compose.ui.unit.dp
 import androidx.navigation.NavController
 import androidx.navigation.compose.rememberNavController
 import coil.compose.AsyncImage
 import com.vitorpamplona.amethyst.model.Note
+import com.vitorpamplona.amethyst.model.toNote
 import com.vitorpamplona.amethyst.service.model.ReactionEvent
 import com.vitorpamplona.amethyst.service.model.RepostEvent
 import com.vitorpamplona.amethyst.ui.components.RichTextViewer
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 import nostr.postr.events.TextNoteEvent
+import nostr.postr.toNpub
 
+@OptIn(ExperimentalFoundationApi::class)
 @Composable
 fun NoteCompose(baseNote: Note, modifier: Modifier = Modifier, isInnerNote: Boolean = false, accountViewModel: AccountViewModel, navController: NavController) {
     val noteState by baseNote.live.observeAsState()
     val note = noteState?.note
 
+    var popupExpanded by remember { mutableStateOf(false) }
+
     if (note?.event == null) {
         BlankNote(modifier, isInnerNote)
     } else {
         val authorState by note.author!!.live.observeAsState()
         val author = authorState?.user
 
-        Column(modifier = modifier) {
+        Column(modifier =
+            modifier.combinedClickable(
+                onClick = { navController.navigate("Note/${note.idHex}") },
+                onLongClick = { popupExpanded = true },
+            )
+        ) {
             Row(
                 modifier = Modifier
                     .padding(
                         start = if (!isInnerNote) 12.dp else 0.dp,
                         end = if (!isInnerNote) 12.dp else 0.dp,
                         top = 10.dp)
-                    .clickable ( onClick = { navController.navigate("Note/${note.idHex}") } )
             ) {
 
                 // Draws the boosted picture outside the boosted card.
@@ -88,7 +106,7 @@ fun NoteCompose(baseNote: Note, modifier: Modifier = Modifier, isInnerNote: Bool
 
                         if (note.event !is RepostEvent) {
                             Text(
-                                "   " + timeAgo(note.event?.createdAt),
+                                timeAgo(note.event?.createdAt),
                                 color = MaterialTheme.colors.onSurface.copy(alpha = 0.32f)
                             )
                         } else {
@@ -136,8 +154,34 @@ fun NoteCompose(baseNote: Note, modifier: Modifier = Modifier, isInnerNote: Bool
                             thickness = 0.25.dp
                         )
                     }
+
+                    NoteDropDownMenu(note, popupExpanded, { popupExpanded = false }, accountViewModel)
                 }
             }
         }
     }
+}
+
+@Composable
+fun NoteDropDownMenu(note: Note, popupExpanded: Boolean, onDismiss: () -> Unit, accountViewModel: AccountViewModel) {
+    val clipboardManager = LocalClipboardManager.current
+
+    DropdownMenu(
+        expanded = popupExpanded,
+        onDismissRequest = onDismiss
+    ) {
+        DropdownMenuItem(onClick = { clipboardManager.setText(AnnotatedString(note.event?.content ?: "")); onDismiss() }) {
+            Text("Copy Text")
+        }
+        DropdownMenuItem(onClick = { clipboardManager.setText(AnnotatedString(note.author?.pubkey?.toNpub() ?: "")); onDismiss() }) {
+            Text("Copy User ID")
+        }
+        DropdownMenuItem(onClick = { clipboardManager.setText(AnnotatedString(note.id.toNote())); onDismiss() }) {
+            Text("Copy Note ID")
+        }
+        Divider()
+        DropdownMenuItem(onClick = { accountViewModel.broadcast(note); onDismiss() }) {
+            Text("Broadcast")
+        }
+    }
 }

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

@@ -14,5 +14,24 @@ fun timeAgo(mills: Long?): String {
   if (humanReadable.startsWith("In") || humanReadable.startsWith("0")) {
     humanReadable = "now";
   }
+
+  return " • " + humanReadable
+    .replace(" hr. ago", "h")
+    .replace(" min. ago", "m")
+}
+
+fun timeAgoLong(mills: Long?): String {
+  if (mills == null) return " "
+
+  var humanReadable = DateUtils.getRelativeTimeSpanString(
+    mills * 1000,
+    System.currentTimeMillis(),
+    DateUtils.MINUTE_IN_MILLIS,
+    DateUtils.FORMAT_SHOW_TIME
+  ).toString()
+  if (humanReadable.startsWith("In") || humanReadable.startsWith("0")) {
+    humanReadable = "now";
+  }
+
   return humanReadable
 }

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

@@ -58,6 +58,7 @@ import com.vitorpamplona.amethyst.ui.note.NoteCompose
 import com.vitorpamplona.amethyst.ui.note.ReactionsRowState
 import com.vitorpamplona.amethyst.ui.note.UserDisplay
 import com.vitorpamplona.amethyst.ui.note.timeAgo
+import com.vitorpamplona.amethyst.ui.note.timeAgoLong
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 import kotlinx.coroutines.launch
 
@@ -201,7 +202,7 @@ fun NoteMaster(baseNote: Note, accountViewModel: AccountViewModel, navController
 
                     Row(verticalAlignment = Alignment.CenterVertically) {
                         Text(
-                            timeAgo(note.event?.createdAt),
+                            timeAgoLong(note.event?.createdAt),
                             color = MaterialTheme.colors.onSurface.copy(alpha = 0.32f)
                         )
                     }

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

@@ -7,6 +7,7 @@ import com.vitorpamplona.amethyst.model.Account
 import com.vitorpamplona.amethyst.model.AccountState
 import com.vitorpamplona.amethyst.model.Note
 import com.vitorpamplona.amethyst.model.UserState
+import com.vitorpamplona.amethyst.service.relays.Client
 
 class AccountViewModel(private val account: Account): ViewModel() {
   val accountLiveData: LiveData<AccountState> = Transformations.map(account.live) { it }
@@ -19,4 +20,10 @@ class AccountViewModel(private val account: Account): ViewModel() {
   fun boost(note: Note) {
     account.boost(note)
   }
+
+  fun broadcast(note: Note) {
+    note.event?.let {
+      Client.send(it)
+    }
+  }
 }

app/src/main/res/drawable/lightning.xml

@@ -0,0 +1,12 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="280dp"
+    android:height="280dp"
+    android:viewportWidth="280"
+    android:viewportHeight="280">
+  <path
+      android:pathData="M7,140.5C7,66.77 66.77,7 140.5,7C214.23,7 274,66.77 274,140.5C274,214.23 214.23,274 140.5,274C66.77,274 7,214.23 7,140.5Z"
+      android:fillColor="#f7931a"/>
+  <path
+      android:pathData="M161.19,51.5C153.23,72.16 145.28,94.41 135.72,116.66C135.72,116.66 135.72,119.84 138.91,119.84L204.17,119.84C204.17,119.84 204.17,121.43 205.77,123.02L110.25,229.5C108.66,227.91 108.66,226.32 108.66,224.73L142.09,153.21L142.09,146.86L75.23,146.86L75.23,140.5L156.42,51.5L161.19,51.5Z"
+      android:fillColor="#ffffff"/>
+</vector>