feat: Test if custom folder is accessible before setting it

Signed-off-by: Myzel394 <50424412+Myzel394@users.noreply.github.com>

app/src/main/java/app/myzel394/alibi/helpers/BatchesFolder.kt

@@ -586,15 +586,27 @@ abstract class BatchesFolder(
         MEDIA,
     }
 
-    class InaccessibleError : RuntimeException() {
-
-    }
-
     companion object {
         fun requiredBytesForOneMinuteOfRecording(appSettings: AppSettings): Long {
             // 350 MiB sounds like a good default
             return 350 * 1024 * 1024
         }
+
+        fun canAccessFolder(context: Context, uri: Uri): Boolean {
+            return try {
+                // Create temp file
+                val tempFile = DocumentFile.fromSingleUri(context, uri)!!.createFile(
+                    "application/octet-stream",
+                    "temp"
+                )!!
+                tempFile.delete()
+
+                true
+            } catch (error: RuntimeException) {
+                error.printStackTrace()
+                false
+            }
+        }
     }
 }
 

app/src/main/java/app/myzel394/alibi/ui/components/SettingsScreen/Tiles/SaveFolderTile.kt

@@ -22,6 +22,7 @@ import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.automirrored.filled.InsertDriveFile
 import androidx.compose.material.icons.filled.CameraAlt
 import androidx.compose.material.icons.filled.Cancel
+import androidx.compose.material.icons.filled.Error
 import androidx.compose.material.icons.filled.Folder
 import androidx.compose.material.icons.filled.Lock
 import androidx.compose.material.icons.filled.Mic
@@ -62,6 +63,7 @@ import app.myzel394.alibi.R
 import app.myzel394.alibi.dataStore
 import app.myzel394.alibi.db.AppSettings
 import app.myzel394.alibi.helpers.AudioBatchesFolder
+import app.myzel394.alibi.helpers.BatchesFolder
 import app.myzel394.alibi.helpers.VideoBatchesFolder
 import app.myzel394.alibi.ui.AUDIO_RECORDING_BATCHES_SUBFOLDER_NAME
 import app.myzel394.alibi.ui.MEDIA_SUBFOLDER_NAME
@@ -91,18 +93,35 @@ fun SaveFolderTile(
     val context = LocalContext.current
     val dataStore = context.dataStore
 
+    var showError by remember { mutableStateOf(false) }
+
     val successMessage = stringResource(R.string.ui_settings_option_saveFolder_success)
     fun updateValue(path: String?) {
+        if (path == null) {
+            return
+        }
+
+        if (!BatchesFolder.canAccessFolder(context, path.toUri())) {
+            showError = true
+            return
+        }
+
         if (settings.saveFolder != null && settings.saveFolder != RECORDER_MEDIA_SELECTED_VALUE) {
             runCatching {
-                context.contentResolver.releasePersistableUriPermission(
-                    Uri.parse(settings.saveFolder),
-                    Intent.FLAG_GRANT_READ_URI_PERMISSION or Intent.FLAG_GRANT_WRITE_URI_PERMISSION
-                )
+                // Clean up
+                val grantedURIs = context.contentResolver.persistedUriPermissions;
+
+                grantedURIs.forEach { permission ->
+                    context.contentResolver.releasePersistableUriPermission(
+                        permission.uri,
+                        Intent.FLAG_GRANT_READ_URI_PERMISSION
+                                or Intent.FLAG_GRANT_WRITE_URI_PERMISSION
+                    )
+                }
             }
         }
 
-        if (path != null && path != RECORDER_MEDIA_SELECTED_VALUE) {
+        if (path != RECORDER_MEDIA_SELECTED_VALUE) {
             context.contentResolver.takePersistableUriPermission(
                 Uri.parse(path),
                 Intent.FLAG_GRANT_READ_URI_PERMISSION or Intent.FLAG_GRANT_WRITE_URI_PERMISSION
@@ -130,6 +149,45 @@ fun SaveFolderTile(
         }
     }
 
+    if (showError) {
+        AlertDialog(
+            onDismissRequest = {
+                showError = false
+            },
+            icon = {
+                Icon(
+                    Icons.Default.Error,
+                    contentDescription = null,
+                )
+            },
+            title = {
+                Text(stringResource(R.string.ui_error_occurred_title))
+            },
+            confirmButton = {
+                Button(onClick = {
+                    showError = false
+                }) {
+                    Text(stringResource(R.string.dialog_close_neutral_label))
+                }
+            },
+            text = {
+                Column(
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .verticalScroll(rememberScrollState()),
+                    horizontalAlignment = Alignment.CenterHorizontally,
+                    verticalArrangement = Arrangement.spacedBy(32.dp),
+                ) {
+                    Text(
+                        stringResource(R.string.ui_settings_option_saveFolder_batchesFolderInaccessible_error),
+                        style = MaterialTheme.typography.bodySmall,
+                        color = MaterialTheme.colorScheme.onSurface,
+                    )
+                }
+            }
+        )
+    }
+
     if (selectionVisible) {
         SelectionSheet(
             sheetState = selectionSheetState,

app/src/main/res/values/strings.xml

@@ -222,4 +222,6 @@
     <string name="ui_about_support_title">Get Support</string>
     <string name="ui_about_support_message">If you have any questions, feedback or face any issues, please don\'t hesitate to contact me. I\'m happy to help you! Below is a list of ways to get in touch with me:</string>
     <string name="ui_welcome_timeSettings_values_1min">1 Minute</string>
+    <string name="ui_error_occurred_title">There was an error</string>
+    <string name="ui_settings_option_saveFolder_batchesFolderInaccessible_error">Alibi can\'t access this folder. Please select a different one</string>
 </resources>