isolate launcher download from release fetch

app/src/main/java/com/geode/launcher/main/UpdateComponents.kt

@@ -114,7 +114,7 @@ object LauncherUpdater {
         _uiState.emit(LauncherUpdateState.Inactive)
     }
 
-    suspend fun downloadUpdate(context: Context): File? {
+    suspend fun downloadUpdate(context: Context): Result<File> {
         _uiState.emit(LauncherUpdateState.Downloading)
 
         return withContext(Dispatchers.IO) {
@@ -188,25 +188,31 @@ object LauncherUpdater {
 
 suspend fun installLauncherUpdate(context: Context) {
     val launcherDownload = downloadUpdate(context)
-
-    if (launcherDownload != null) {
-        if (!launcherDownload.exists()) {
+        .getOrElse { e ->
+            e.printStackTrace()
+            Toast.makeText(
+                context, context.getString(
+                    R.string.launcher_update_download_failed,
+                    e.cause
+                ), Toast.LENGTH_SHORT
+            ).show()
             return
         }
 
-        PreferenceUtils.get(context).setBoolean(PreferenceUtils.Key.CLEANUP_APKS, true)
+    if (!launcherDownload.exists()) {
+        return
+    }
 
-        try {
-            LauncherUpdater.installPackage(context, launcherDownload)
-        } catch (e: Exception) {
-            e.printStackTrace()
-            val msg = context.getString(R.string.launcher_self_update_failed, e.message)
-            Toast.makeText(context, msg, Toast.LENGTH_SHORT).show()
+    PreferenceUtils.get(context).setBoolean(PreferenceUtils.Key.CLEANUP_APKS, true)
 
-            LauncherUpdater.resetState()
-        }
-    } else {
-        Toast.makeText(context, context.getString(R.string.release_fetch_no_releases), Toast.LENGTH_SHORT).show()
+    try {
+        LauncherUpdater.installPackage(context, launcherDownload)
+    } catch (e: Exception) {
+        e.printStackTrace()
+        val msg = context.getString(R.string.launcher_self_update_failed, e.message)
+        Toast.makeText(context, msg, Toast.LENGTH_SHORT).show()
+
+        LauncherUpdater.resetState()
     }
 }
 
@@ -214,8 +220,6 @@ suspend fun installLauncherUpdate(context: Context) {
 fun LauncherUpdateDialog(isCancelling: Boolean, onDismiss: () -> Unit) {
     val updateState by LauncherUpdater.uiState.collectAsState()
 
-    val cancellable = updateState != LauncherUpdater.LauncherUpdateState.Active
-
     LaunchedEffect(updateState) {
         if (updateState == LauncherUpdater.LauncherUpdateState.Finished) {
             onDismiss()
@@ -242,7 +246,7 @@ fun LauncherUpdateDialog(isCancelling: Boolean, onDismiss: () -> Unit) {
             LinearProgressIndicator()
         },
         confirmButton = {
-            TextButton(onClick = onDismiss, enabled = cancellable && !isCancelling) {
+            TextButton(onClick = onDismiss, enabled = !isCancelling) {
                 Text(stringResource(R.string.message_box_cancel))
             }
         },

app/src/main/java/com/geode/launcher/updater/ReleaseManager.kt

@@ -21,6 +21,7 @@ import okhttp3.OkHttpClient
 import okio.buffer
 import okio.source
 import java.io.File
+import java.io.FileNotFoundException
 import java.io.InterruptedIOException
 import kotlin.time.Clock
 import kotlin.time.Duration.Companion.minutes
@@ -136,38 +137,27 @@ class ReleaseManager private constructor(
         }
     }
 
-    private suspend fun downloadLauncherUpdate(release: Downloadable): File? {
-        val download = release.getDownload() ?: return null
+    private suspend fun downloadLauncherUpdate(release: Downloadable): Result<File> {
+        val download = release.getDownload()
+            ?: return Result.failure(FileNotFoundException())
 
         val outputDirectory = applicationContext.filesDir
         val outputFile = File(outputDirectory, download.filename)
 
-        /*
-        if (outputFile.exists()) {
-            // only download the apk once
-            return
-        }
-        */
-
-        _uiState.value = ReleaseManagerState.InDownload(0, download.size)
-
         try {
             DownloadUtils.downloadStream(
                 httpClient,
                 download.url
-            ) { progress, outOf ->
-                _uiState.value = ReleaseManagerState.InDownload(progress, outOf)
-            }.use { fileStream ->
+            ).use { fileStream ->
                 outputFile.outputStream().use {
                     fileStream.copyTo(it)
                 }
             }
         } catch (e: Exception) {
-            sendError(e)
-            return null
+            return Result.failure(e)
         }
 
-        return outputFile
+        return Result.success(outputFile)
     }
 
     private suspend fun performUpdate(release: Downloadable) {
@@ -275,10 +265,10 @@ class ReleaseManager private constructor(
         }
     }
 
-    suspend fun downloadLatestLauncherUpdate(): File? {
+    suspend fun downloadLatestLauncherUpdate(): Result<File> {
         val update = _availableLauncherUpdateDetails.value
             ?: getLatestLauncherUpdate()
-            ?: return null
+            ?: return Result.failure(FileNotFoundException())
 
         return downloadLauncherUpdate(update)
     }

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

@@ -70,6 +70,7 @@
     <string name="launcher_self_update_failed_title">Update failed</string>
 
     <string name="launcher_self_update_failed">Failed to install launcher update: %1$s.</string>
+    <string name="launcher_update_download_failed">Downloading update failed: %1$s</string>
     <string name="launcher_self_update_progress">Installing update…</string>
 
     <string name="launcher_starting_game">Starting Geometry Dash…</string>