Retry a few times if a favorites sync entry times out

app/src/main/java/exh/GalleryAdder.kt

@@ -59,6 +59,7 @@ class GalleryAdder(
         fav: Boolean = false,
         forceSource: UrlImportableSource? = null,
         throttleFunc: suspend () -> Unit = {},
+        retry: Int = 1
     ): GalleryAddEvent {
         logger.d(context.getString(R.string.gallery_adder_importing_gallery, url, fav.toString(), forceSource))
         try {
@@ -138,7 +139,7 @@ class GalleryAdder(
                 )
 
             // Fetch and copy details
-            val newManga = source.getMangaDetails(manga.toSManga())
+            val newManga = retry(retry) { source.getMangaDetails(manga.toSManga()) }
             updateManga.awaitUpdateFromSource(manga, newManga, false)
             manga = getManga.await(manga.id)!!
 
@@ -149,10 +150,12 @@ class GalleryAdder(
 
             // Fetch and copy chapters
             try {
-                val chapterList = if (source is EHentai) {
-                    source.getChapterList(manga.toSManga(), throttleFunc)
-                } else {
-                    source.getChapterList(manga.toSManga())
+                val chapterList = retry(retry) {
+                    if (source is EHentai) {
+                        source.getChapterList(manga.toSManga(), throttleFunc)
+                    } else {
+                        source.getChapterList(manga.toSManga())
+                    }
                 }
 
                 if (chapterList.isNotEmpty()) {
@@ -186,6 +189,28 @@ class GalleryAdder(
             )
         }
     }
+
+    private inline fun <T : Any> retry(retryCount: Int, block: () -> T): T {
+        var result: T? = null
+        var lastError: Exception? = null
+
+        for (i in 1..retryCount) {
+            try {
+                result = block()
+            } catch (e: Exception) {
+                if (e is EHentai.GalleryNotFoundException) {
+                    throw e
+                }
+                lastError = e
+            }
+        }
+
+        if (lastError != null) {
+            throw lastError
+        }
+
+        return result!!
+    }
 }
 
 sealed class GalleryAddEvent {

app/src/main/java/exh/favorites/FavoritesSyncHelper.kt

@@ -246,7 +246,7 @@ class FavoritesSyncHelper(val context: Context) {
                 errorList += errorString
             } else {
                 status.value = FavoritesSyncStatus.Error(errorString)
-                throw IgnoredException()
+                throw IgnoredException(errorString)
             }
         }
     }
@@ -296,7 +296,7 @@ class FavoritesSyncHelper(val context: Context) {
                     errorList += errorString
                 } else {
                     status.value = FavoritesSyncStatus.Error(errorString)
-                    throw IgnoredException()
+                    throw IgnoredException(errorString)
                 }
             }
         }
@@ -361,11 +361,12 @@ class FavoritesSyncHelper(val context: Context) {
 
             // Import using gallery adder
             val result = galleryAdder.addGallery(
-                context,
-                "${exh.baseUrl}${it.getUrl()}",
-                true,
-                exh,
-                throttleManager::throttle,
+                context = context,
+                url = "${exh.baseUrl}${it.getUrl()}",
+                fav = true,
+                forceSource = exh,
+                throttleFunc = throttleManager::throttle,
+                retry = 3
             )
 
             if (result is GalleryAddEvent.Fail) {
@@ -385,7 +386,7 @@ class FavoritesSyncHelper(val context: Context) {
                     errorList += errorString
                 } else {
                     status.value = FavoritesSyncStatus.Error(errorString)
-                    throw IgnoredException()
+                    throw IgnoredException(errorString)
                 }
             } else if (result is GalleryAddEvent.Success) {
                 insertedMangaCategories += categories[it.category].id to result.manga
@@ -401,7 +402,7 @@ class FavoritesSyncHelper(val context: Context) {
     private fun needWarnThrottle() =
         throttleManager.throttleTime >= THROTTLE_WARN
 
-    class IgnoredException : RuntimeException()
+    class IgnoredException(message: String) : RuntimeException(message)
 
     companion object {
         private val THROTTLE_WARN = 1.seconds

app/src/main/java/exh/ui/batchadd/BatchAddScreenModel.kt

@@ -68,7 +68,14 @@ class BatchAddScreenModel(
 
             splitGalleries.forEachIndexed { i, s ->
                 ensureActive()
-                val result = withIOContext { galleryAdder.addGallery(context, s, true) }
+                val result = withIOContext {
+                    galleryAdder.addGallery(
+                        context = context,
+                        url = s,
+                        fav = true,
+                        retry = 2
+                    )
+                }
                 if (result is GalleryAddEvent.Success) {
                     succeeded.add(s)
                 } else {