improve media upload error messages (#2602)

app/src/main/java/com/keylesspalace/tusky/components/compose/ComposeActivity.kt

@@ -161,7 +161,7 @@ class ComposeActivity :
         val uriNew = result.uriContent
         if (result.isSuccessful && uriNew != null) {
             viewModel.cropImageItemOld?.let { itemOld ->
-                val size = getMediaSize(getApplicationContext().getContentResolver(), uriNew)
+                val size = getMediaSize(contentResolver, uriNew)
 
                 lifecycleScope.launch {
                     viewModel.addMediaToQueue(
@@ -407,8 +407,13 @@ class ComposeActivity :
                 enableButton(binding.composeAddMediaButton, active, active)
                 enablePollButton(media.isNullOrEmpty())
             }.subscribe()
-            viewModel.uploadError.observe {
-                displayTransientError(R.string.error_media_upload_sending)
+            viewModel.uploadError.observe { throwable ->
+                Log.w(TAG, "media upload failed", throwable)
+                if (throwable is UploadServerError) {
+                    displayTransientError(throwable.errorMessage)
+                } else {
+                    displayTransientError(R.string.error_media_upload_sending)
+                }
             }
             viewModel.setupComplete.observe {
                 // Focus may have changed during view model setup, ensure initial focus is on the edit field
@@ -553,19 +558,23 @@ class ComposeActivity :
         super.onSaveInstanceState(outState)
     }
 
-    private fun displayTransientError(@StringRes stringId: Int) {
-        val bar = Snackbar.make(binding.activityCompose, stringId, Snackbar.LENGTH_LONG)
+    private fun displayTransientError(errorMessage: String) {
+        val bar = Snackbar.make(binding.activityCompose, errorMessage, Snackbar.LENGTH_LONG)
         // necessary so snackbar is shown over everything
         bar.view.elevation = resources.getDimension(R.dimen.compose_activity_snackbar_elevation)
+        bar.setAnchorView(R.id.composeBottomBar)
         bar.show()
     }
+    private fun displayTransientError(@StringRes stringId: Int) {
+        displayTransientError(getString(stringId))
+    }
 
     private fun toggleHideMedia() {
         this.viewModel.toggleMarkSensitive()
     }
 
     private fun updateSensitiveMediaToggle(markMediaSensitive: Boolean, contentWarningShown: Boolean) {
-        if (viewModel.media.value.isNullOrEmpty()) {
+        if (viewModel.media.value.isEmpty()) {
             binding.composeHideMediaButton.hide()
         } else {
             binding.composeHideMediaButton.show()
@@ -904,11 +913,10 @@ class ComposeActivity :
         // Currently the only supported lossless format is png.
         val mimeType: String? = contentResolver.getType(item.uri)
         val isPng: Boolean = mimeType != null && mimeType.endsWith("/png")
-        val context = getApplicationContext()
-        val tempFile = createNewImageFile(context, if (isPng) ".png" else ".jpg")
+        val tempFile = createNewImageFile(this, if (isPng) ".png" else ".jpg")
 
         // "Authority" must be the same as the android:authorities string in AndroidManifest.xml
-        val uriNew = FileProvider.getUriForFile(context, BuildConfig.APPLICATION_ID + ".fileprovider", tempFile)
+        val uriNew = FileProvider.getUriForFile(this, BuildConfig.APPLICATION_ID + ".fileprovider", tempFile)
 
         viewModel.cropImageItemOld = item
 

app/src/main/java/com/keylesspalace/tusky/components/compose/ComposeViewModel.kt

@@ -219,7 +219,7 @@ class ComposeViewModel @Inject constructor(
         val contentWarningChanged = showContentWarning.value!! &&
             !contentWarning.isNullOrEmpty() &&
             !startingContentWarning.startsWith(contentWarning.toString())
-        val mediaChanged = !media.value.isNullOrEmpty()
+        val mediaChanged = media.value.isNotEmpty()
         val pollChanged = poll.value != null
 
         return modifiedInitialState || textChanged || contentWarningChanged || mediaChanged || pollChanged

app/src/main/java/com/keylesspalace/tusky/components/compose/MediaUploader.kt

@@ -23,7 +23,7 @@ import android.util.Log
 import android.webkit.MimeTypeMap
 import androidx.core.content.FileProvider
 import androidx.core.net.toUri
-import at.connyduck.calladapter.networkresult.getOrThrow
+import at.connyduck.calladapter.networkresult.fold
 import com.keylesspalace.tusky.BuildConfig
 import com.keylesspalace.tusky.R
 import com.keylesspalace.tusky.components.compose.ComposeActivity.QueuedMedia
@@ -32,6 +32,7 @@ import com.keylesspalace.tusky.network.ProgressRequestBody
 import com.keylesspalace.tusky.util.MEDIA_SIZE_UNKNOWN
 import com.keylesspalace.tusky.util.getImageSquarePixels
 import com.keylesspalace.tusky.util.getMediaSize
+import com.keylesspalace.tusky.util.getServerErrorMessage
 import com.keylesspalace.tusky.util.randomAlphanumericString
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.ExperimentalCoroutinesApi
@@ -73,6 +74,7 @@ class AudioSizeException : Exception()
 class VideoSizeException : Exception()
 class MediaTypeException : Exception()
 class CouldNotOpenFileException : Exception()
+class UploadServerError(val errorMessage: String) : Exception()
 
 class MediaUploader @Inject constructor(
     private val context: Context,
@@ -223,8 +225,16 @@ class MediaUploader @Inject constructor(
                 null
             }
 
-            val result = mediaUploadApi.uploadMedia(body, description).getOrThrow()
-            send(UploadEvent.FinishedEvent(result.id))
+            mediaUploadApi.uploadMedia(body, description).fold({ result ->
+                send(UploadEvent.FinishedEvent(result.id))
+            }, { throwable ->
+                val errorMessage = throwable.getServerErrorMessage()
+                if (errorMessage == null) {
+                    throw throwable
+                } else {
+                    throw UploadServerError(errorMessage)
+                }
+            })
             awaitClose()
         }
     }
@@ -241,7 +251,7 @@ class MediaUploader @Inject constructor(
     }
 
     private companion object {
-        private const val TAG = "MediaUploaderImpl"
+        private const val TAG = "MediaUploader"
         private const val STATUS_VIDEO_SIZE_LIMIT = 41943040 // 40MiB
         private const val STATUS_AUDIO_SIZE_LIMIT = 41943040 // 40MiB
         private const val STATUS_IMAGE_SIZE_LIMIT = 8388608 // 8MiB

app/src/main/java/com/keylesspalace/tusky/util/ThrowableExtensions.kt

@@ -0,0 +1,26 @@
+package com.keylesspalace.tusky.util
+
+import org.json.JSONException
+import org.json.JSONObject
+import retrofit2.HttpException
+
+/**
+ * checks if this throwable indicates an error causes by a 4xx/5xx server response and
+ * tries to retrieve the error message the server sent
+ * @return the error message, or null if this is no server error or it had no error message
+ */
+fun Throwable.getServerErrorMessage(): String? {
+    if (this is HttpException) {
+        val errorResponse = response()?.errorBody()?.string()
+        return if (!errorResponse.isNullOrBlank()) {
+            try {
+                JSONObject(errorResponse).getString("error")
+            } catch (e: JSONException) {
+                null
+            }
+        } else {
+            null
+        }
+    }
+    return null
+}

app/src/main/java/com/keylesspalace/tusky/viewmodel/EditProfileViewModel.kt

@@ -32,6 +32,7 @@ import com.keylesspalace.tusky.util.Error
 import com.keylesspalace.tusky.util.Loading
 import com.keylesspalace.tusky.util.Resource
 import com.keylesspalace.tusky.util.Success
+import com.keylesspalace.tusky.util.getServerErrorMessage
 import com.keylesspalace.tusky.util.randomAlphanumericString
 import kotlinx.coroutines.launch
 import okhttp3.MediaType.Companion.toMediaTypeOrNull
@@ -39,9 +40,6 @@ import okhttp3.MultipartBody
 import okhttp3.RequestBody
 import okhttp3.RequestBody.Companion.asRequestBody
 import okhttp3.RequestBody.Companion.toRequestBody
-import org.json.JSONException
-import org.json.JSONObject
-import retrofit2.HttpException
 import java.io.File
 import javax.inject.Inject
 
@@ -156,21 +154,7 @@ class EditProfileViewModel @Inject constructor(
                     eventHub.dispatch(ProfileEditedEvent(newProfileData))
                 },
                 { throwable ->
-                    if (throwable is HttpException) {
-                        val errorResponse = throwable.response()?.errorBody()?.string()
-                        val errorMsg = if (!errorResponse.isNullOrBlank()) {
-                            try {
-                                JSONObject(errorResponse).optString("error", "")
-                            } catch (e: JSONException) {
-                                null
-                            }
-                        } else {
-                            null
-                        }
-                        saveData.postValue(Error(errorMessage = errorMsg))
-                    } else {
-                        saveData.postValue(Error())
-                    }
+                    saveData.postValue(Error(errorMessage = throwable.getServerErrorMessage()))
                 }
             )
         }

app/src/main/res/layout/activity_compose.xml

@@ -239,6 +239,7 @@
         app:layout_behavior="com.google.android.material.bottomsheet.BottomSheetBehavior" />
 
     <LinearLayout
+        android:id="@+id/composeBottomBar"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_gravity="bottom"