feat: Add low on storage info; Closes #56

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

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

@@ -7,12 +7,15 @@ import android.content.Context
 import android.database.Cursor
 import android.net.Uri
 import android.os.Build
+import android.os.storage.StorageManager
 import android.provider.MediaStore
 import android.provider.MediaStore.Video.Media
 import android.util.Log
 import androidx.annotation.RequiresApi
+import androidx.core.net.toFile
 import androidx.core.net.toUri
 import androidx.documentfile.provider.DocumentFile
+import app.myzel394.alibi.db.AppSettings
 import app.myzel394.alibi.ui.MEDIA_RECORDINGS_PREFIX
 import app.myzel394.alibi.ui.RECORDER_INTERNAL_SELECTED_VALUE
 import app.myzel394.alibi.ui.RECORDER_MEDIA_SELECTED_VALUE
@@ -519,10 +522,32 @@ abstract class BatchesFolder(
         return uri!!
     }
 
+    fun getAvailableBytes(): Long {
+        val storageManager = context.getSystemService(StorageManager::class.java) ?: return -1
+        val file = when (type) {
+            BatchType.INTERNAL -> context.filesDir
+            BatchType.CUSTOM -> customFolder!!.uri.toFile()
+            BatchType.MEDIA -> scopedMediaContentUri.toFile()
+        }
+
+        return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            storageManager.getAllocatableBytes(storageManager.getUuidForPath(file))
+        } else {
+            file.usableSpace;
+        }
+    }
+
     enum class BatchType {
         INTERNAL,
         CUSTOM,
         MEDIA,
     }
+
+    companion object {
+        fun requiredBytesForOneMinuteOfRecording(appSettings: AppSettings): Long {
+            // 300 MiB sounds like a good default
+            return 300 * 1024 * 1024
+        }
+    }
 }
 

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

@@ -135,7 +135,8 @@ class VideoBatchesFolder(
 
         fun viaMediaFolder(context: Context) = VideoBatchesFolder(context, BatchType.MEDIA)
 
-        fun importFromFolder(folder: String, context: Context) = when (folder) {
+        fun importFromFolder(folder: String?, context: Context) = when (folder) {
+            null -> viaInternalFolder(context)
             RECORDER_INTERNAL_SELECTED_VALUE -> viaInternalFolder(context)
             RECORDER_MEDIA_SELECTED_VALUE -> viaMediaFolder(context)
             else -> viaCustomFolder(

app/src/main/java/app/myzel394/alibi/ui/components/RecorderScreen/atoms/LowStorageInfo.kt

@@ -0,0 +1,41 @@
+package app.myzel394.alibi.ui.components.RecorderScreen.atoms
+
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.padding
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.unit.dp
+import app.myzel394.alibi.R
+import app.myzel394.alibi.db.AppSettings
+import app.myzel394.alibi.helpers.BatchesFolder
+import app.myzel394.alibi.helpers.VideoBatchesFolder
+import app.myzel394.alibi.ui.components.atoms.MessageBox
+import app.myzel394.alibi.ui.components.atoms.MessageType
+
+@Composable
+fun LowStorageInfo(
+    appSettings: AppSettings,
+) {
+    val context = LocalContext.current
+    val availableBytes =
+        VideoBatchesFolder.importFromFolder(appSettings.saveFolder, context).getAvailableBytes()
+
+    val bytesPerMinute = BatchesFolder.requiredBytesForOneMinuteOfRecording(appSettings)
+    val requiredBytes = appSettings.maxDuration / 1000 / 60 * bytesPerMinute
+
+    // Allow for a 10% margin of error
+    val isLowOnStorage = availableBytes < requiredBytes * 1.1
+    println("LowStorageInfo: availableBytes: $availableBytes, requiredBytes: $requiredBytes, isLowOnStorage: $isLowOnStorage")
+
+    if (isLowOnStorage)
+        Box(
+            modifier = Modifier.padding(horizontal = 16.dp, vertical = 8.dp)
+        ) {
+            MessageBox(
+                type = MessageType.WARNING,
+                message = stringResource(R.string.ui_recorder_lowOnStorage_hint),
+            )
+        }
+}

app/src/main/java/app/myzel394/alibi/ui/components/RecorderScreen/organisms/StartRecording.kt

@@ -44,6 +44,7 @@ import app.myzel394.alibi.R
 import app.myzel394.alibi.db.AppSettings
 import app.myzel394.alibi.ui.BIG_PRIMARY_BUTTON_MAX_WIDTH
 import app.myzel394.alibi.ui.BIG_PRIMARY_BUTTON_SIZE
+import app.myzel394.alibi.ui.components.RecorderScreen.atoms.LowStorageInfo
 import app.myzel394.alibi.ui.components.RecorderScreen.molecules.AudioRecordingStart
 import app.myzel394.alibi.ui.components.RecorderScreen.molecules.QuickMaxDurationSelector
 import app.myzel394.alibi.ui.components.RecorderScreen.molecules.VideoRecordingStart
@@ -212,5 +213,7 @@ fun StartRecording(
                 }
             }
         }
+
+        LowStorageInfo(appSettings = appSettings)
     }
 }

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

@@ -193,4 +193,5 @@
     <string name="goBack">Back</string>
     <string name="ui_recorder_action_saveCurrent">Save now?</string>
     <string name="ui_recorder_action_saveCurrent_explanation">You can save the current ongoing recording by pressing and holding down on the save button. The recording will continue in the background.</string>
+    <string name="ui_recorder_lowOnStorage_hint">You are low on storage. Alibi may not function properly. Please free up some space.</string>
 </resources>