feat(emoji): upload cover image in emoji pack metadata screen

Reuses the NIP-96/Blossom uploader plumbing from BookmarkGroupMetadata —
the cover image field now shows a gallery-picker icon on its leading
side and populates the URL on upload success. The manual URL input
still works as before.

https://claude.ai/code/session_01SNG3nj8ZZDChggTsg1qznn

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/emojipacks/list/metadata/EmojiPackMetadataScreen.kt

@@ -37,11 +37,13 @@ import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.text.input.KeyboardCapitalization
 import androidx.compose.ui.text.style.TextDirection
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.viewmodel.compose.viewModel
 import com.vitorpamplona.amethyst.R
+import com.vitorpamplona.amethyst.ui.actions.uploads.SelectSingleFromGallery
 import com.vitorpamplona.amethyst.ui.navigation.navs.INav
 import com.vitorpamplona.amethyst.ui.navigation.topbars.CreatingTopBar
 import com.vitorpamplona.amethyst.ui.navigation.topbars.SavingTopBar
@@ -104,7 +106,7 @@ private fun EmojiPackMetadataScaffold(
                 PackName(viewModel)
                 Spacer(modifier = DoubleVertSpacer)
 
-                PackImage(viewModel)
+                PackImage(viewModel, accountViewModel)
                 Spacer(modifier = DoubleVertSpacer)
 
                 PackDescription(viewModel)
@@ -184,7 +186,10 @@ private fun PackName(viewModel: EmojiPackMetadataViewModel) {
 }
 
 @Composable
-private fun PackImage(viewModel: EmojiPackMetadataViewModel) {
+private fun PackImage(
+    viewModel: EmojiPackMetadataViewModel,
+    accountViewModel: AccountViewModel,
+) {
     OutlinedTextField(
         label = { Text(text = stringRes(R.string.emoji_pack_image_label)) },
         modifier = Modifier.fillMaxWidth(),
@@ -196,6 +201,16 @@ private fun PackImage(viewModel: EmojiPackMetadataViewModel) {
                 color = MaterialTheme.colorScheme.placeholderText,
             )
         },
+        leadingIcon = {
+            val context = LocalContext.current
+            SelectSingleFromGallery(
+                isUploading = viewModel.isUploadingImageForPicture,
+                tint = MaterialTheme.colorScheme.placeholderText,
+                modifier = Modifier.padding(start = 2.dp),
+            ) {
+                viewModel.uploadForPicture(it, context, onError = accountViewModel.toastManager::toast)
+            }
+        },
     )
 }
 

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/emojipacks/list/metadata/EmojiPackMetadataViewModel.kt

@@ -20,6 +20,7 @@
  */
 package com.vitorpamplona.amethyst.ui.screen.loggedIn.emojipacks.list.metadata
 
+import android.content.Context
 import androidx.compose.runtime.Stable
 import androidx.compose.runtime.derivedStateOf
 import androidx.compose.runtime.getValue
@@ -27,9 +28,24 @@ import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.text.input.TextFieldValue
 import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.vitorpamplona.amethyst.Amethyst
+import com.vitorpamplona.amethyst.R
 import com.vitorpamplona.amethyst.model.Account
 import com.vitorpamplona.amethyst.model.nip30CustomEmojis.OwnedEmojiPack
+import com.vitorpamplona.amethyst.service.uploads.CompressorQuality
+import com.vitorpamplona.amethyst.service.uploads.MediaCompressor
+import com.vitorpamplona.amethyst.service.uploads.MetadataStripper
+import com.vitorpamplona.amethyst.service.uploads.blossom.BlossomUploader
+import com.vitorpamplona.amethyst.service.uploads.nip96.Nip96Uploader
+import com.vitorpamplona.amethyst.ui.actions.mediaServers.ServerType
+import com.vitorpamplona.amethyst.ui.actions.uploads.SelectedMedia
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
+import com.vitorpamplona.amethyst.ui.stringRes
+import com.vitorpamplona.quartz.nip01Core.signers.SignerExceptions
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlin.coroutines.cancellation.CancellationException
 
 @Stable
 class EmojiPackMetadataViewModel : ViewModel() {
@@ -43,6 +59,8 @@ class EmojiPackMetadataViewModel : ViewModel() {
     val picture = mutableStateOf(TextFieldValue())
     val description = mutableStateOf(TextFieldValue())
 
+    var isUploadingImageForPicture by mutableStateOf(false)
+
     val canPost by derivedStateOf {
         name.value.text.isNotBlank()
     }
@@ -91,4 +109,92 @@ class EmojiPackMetadataViewModel : ViewModel() {
         picture.value = TextFieldValue()
         description.value = TextFieldValue()
     }
+
+    fun uploadForPicture(
+        uri: SelectedMedia,
+        context: Context,
+        onError: (String, String) -> Unit,
+    ) {
+        viewModelScope.launch(Dispatchers.IO) {
+            upload(
+                uri,
+                context,
+                onUploading = { isUploadingImageForPicture = it },
+                onUploaded = { picture.value = TextFieldValue(it) },
+                onError = onError,
+            )
+        }
+    }
+
+    private suspend fun upload(
+        galleryUri: SelectedMedia,
+        context: Context,
+        onUploading: (Boolean) -> Unit,
+        onUploaded: (String) -> Unit,
+        onError: (String, String) -> Unit,
+    ) {
+        onUploading(true)
+
+        val sourceUri =
+            if (account.settings.stripLocationOnUpload) {
+                val result = MetadataStripper.strip(galleryUri.uri, galleryUri.mimeType, context.applicationContext)
+                if (!result.stripped) {
+                    onError(
+                        stringRes(context, R.string.metadata_strip_failed_title),
+                        stringRes(context, R.string.metadata_strip_failed_upload_cancelled),
+                    )
+                    onUploading(false)
+                    return
+                }
+                result.uri
+            } else {
+                galleryUri.uri
+            }
+        val compResult = MediaCompressor().compress(sourceUri, galleryUri.mimeType, CompressorQuality.MEDIUM, context.applicationContext)
+
+        try {
+            val result =
+                if (account.settings.defaultFileServer.type == ServerType.NIP96) {
+                    Nip96Uploader().upload(
+                        uri = compResult.uri,
+                        contentType = compResult.contentType,
+                        size = compResult.size,
+                        alt = null,
+                        sensitiveContent = null,
+                        serverBaseUrl = account.settings.defaultFileServer.baseUrl,
+                        okHttpClient = Amethyst.instance.roleBasedHttpClientBuilder::okHttpClientForUploads,
+                        onProgress = {},
+                        httpAuth = account::createHTTPAuthorization,
+                        context = context,
+                    )
+                } else {
+                    BlossomUploader().upload(
+                        uri = compResult.uri,
+                        contentType = compResult.contentType,
+                        size = compResult.size,
+                        alt = null,
+                        sensitiveContent = null,
+                        serverBaseUrl = account.settings.defaultFileServer.baseUrl,
+                        okHttpClient = Amethyst.instance.roleBasedHttpClientBuilder::okHttpClientForUploads,
+                        httpAuth = account::createBlossomUploadAuth,
+                        context = context,
+                    )
+                }
+
+            if (result.url != null) {
+                onUploading(false)
+                onUploaded(result.url)
+            } else {
+                onUploading(false)
+                onError(stringRes(context, R.string.failed_to_upload_media_no_details), stringRes(context, R.string.server_did_not_provide_a_url_after_uploading))
+            }
+        } catch (_: SignerExceptions.ReadOnlyException) {
+            onUploading(false)
+            onError(stringRes(context, R.string.failed_to_upload_media_no_details), stringRes(context, R.string.login_with_a_private_key_to_be_able_to_upload))
+        } catch (e: Exception) {
+            if (e is CancellationException) throw e
+            onUploading(false)
+            onError(stringRes(context, R.string.failed_to_upload_media_no_details), e.message ?: e.javaClass.simpleName)
+        }
+    }
 }