Ignore non-existent galleries during favorites sync

app/src/main/java/eu/kanade/tachiyomi/network/OkHttpExtensions.kt

@@ -10,7 +10,11 @@ import rx.Producer
 import rx.Subscription
 import java.util.concurrent.atomic.AtomicBoolean
 
-fun Call.asObservable(): Observable<Response> {
+fun Call.asObservableWithAsyncStacktrace(): Observable<Pair<Exception, Response>> {
+    // Record stacktrace at creation time for easier debugging
+    //   asObservable is involved in a lot of crashes so this is worth the performance hit
+    val asyncStackTrace = Exception("Async stacktrace")
+
     return Observable.unsafeCreate { subscriber ->
         // Since Call is a one-shot type, clone it for each new subscriber.
         val call = clone()
@@ -23,12 +27,12 @@ fun Call.asObservable(): Observable<Response> {
                 try {
                     val response = call.execute()
                     if (!subscriber.isUnsubscribed) {
-                        subscriber.onNext(response)
+                        subscriber.onNext(asyncStackTrace to response)
                         subscriber.onCompleted()
                     }
                 } catch (error: Exception) {
                     if (!subscriber.isUnsubscribed) {
-                        subscriber.onError(error)
+                        subscriber.onError(error.withRootCause(asyncStackTrace))
                     }
                 }
             }
@@ -47,19 +51,14 @@ fun Call.asObservable(): Observable<Response> {
     }
 }
 
-fun Call.asObservableSuccess(): Observable<Response> {
+fun Call.asObservable() = asObservableWithAsyncStacktrace().map { it.second }
-    // Record stacktrace at creation time for easier debugging
-    //   asObservable is involved in a lot of crashes so this is worth the performance hit
-    val asyncStackTrace = Exception("Async stacktrace")
 
-    return asObservable().doOnNext { response ->
+fun Call.asObservableSuccess(): Observable<Response> {
+    return asObservableWithAsyncStacktrace().map { (asyncStacktrace, response) ->
         if (!response.isSuccessful) {
             response.close()
-            throw Exception("HTTP error ${response.code()}")
+            throw Exception("HTTP error ${response.code()}", asyncStacktrace)
-        }
+        } else response
-    }.onErrorReturn {
-        // Set root cause to async stacktrace and throw again
-        throw it.withRootCause(asyncStackTrace)
     }
 }
 

app/src/main/java/eu/kanade/tachiyomi/source/online/all/EHentai.kt

@@ -7,6 +7,7 @@ import eu.kanade.tachiyomi.data.preference.PreferencesHelper
 import eu.kanade.tachiyomi.data.preference.getOrDefault
 import eu.kanade.tachiyomi.network.GET
 import eu.kanade.tachiyomi.network.asObservableSuccess
+import eu.kanade.tachiyomi.network.asObservableWithAsyncStacktrace
 import eu.kanade.tachiyomi.source.model.*
 import eu.kanade.tachiyomi.source.online.HttpSource
 import eu.kanade.tachiyomi.source.online.LewdSource
@@ -32,6 +33,7 @@ import uy.kohesive.injekt.injectLazy
 import java.net.URLEncoder
 import java.util.*
 import exh.metadata.metadata.base.RaisedTag
+import java.lang.RuntimeException
 
 class EHentai(override val id: Long,
               val exh: Boolean,
@@ -236,11 +238,21 @@ class EHentai(override val id: Long,
      */
     override fun fetchMangaDetails(manga: SManga): Observable<SManga> {
         return client.newCall(mangaDetailsRequest(manga))
-                .asObservableSuccess()
+                .asObservableWithAsyncStacktrace()
-                .flatMap {
+                .flatMap { (stacktrace, response) ->
-                    parseToManga(manga, it).andThen(Observable.just(manga.apply {
+                    if(response.isSuccessful) {
+                        parseToManga(manga, response).andThen(Observable.just(manga.apply {
                             initialized = true
                         }))
+                    } else {
+                        response.close()
+
+                        if(response.code() == 404) {
+                            throw GalleryNotFoundException(stacktrace)
+                        } else {
+                            throw Exception("HTTP error ${response.code()}", stacktrace)
+                        }
+                    }
                 }
     }
 
@@ -522,6 +534,8 @@ class EHentai(override val id: Long,
     else
         "E-Hentai"
 
+    class GalleryNotFoundException(cause: Throwable): RuntimeException("Gallery not found!", cause)
+
     companion object {
         private const val QUERY_PREFIX = "?f_apply=Apply+Filter"
         private const val TR_SUFFIX = "TR"

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

@@ -10,6 +10,7 @@ import eu.kanade.tachiyomi.data.database.DatabaseHelper
 import eu.kanade.tachiyomi.data.database.models.Manga
 import eu.kanade.tachiyomi.network.NetworkHelper
 import eu.kanade.tachiyomi.source.SourceManager
+import eu.kanade.tachiyomi.source.online.all.EHentai
 import eu.kanade.tachiyomi.util.syncChaptersWithSource
 import exh.metadata.metadata.EHentaiSearchMetadata
 import okhttp3.MediaType
@@ -186,6 +187,11 @@ class GalleryAdder {
             return GalleryAddEvent.Success(url, manga)
         } catch(e: Exception) {
             XLog.w("Could not add gallery!", e)
+
+            if(e is EHentai.GalleryNotFoundException) {
+                return GalleryAddEvent.Fail.NotFound(url)
+            }
+
             return GalleryAddEvent.Fail.Error(url,
                     ((e.message ?: "Unknown error!") + " (Gallery: $url)").trim())
         }
@@ -223,7 +229,10 @@ sealed class GalleryAddEvent {
             override val logMessage = "Unknown gallery type for gallery: $galleryUrl"
         }
 
-        class Error(override val galleryUrl: String,
+        open class Error(override val galleryUrl: String,
                     override val logMessage: String): Fail()
+
+        class NotFound(galleryUrl: String):
+                Error(galleryUrl, "Gallery does not exist: $galleryUrl")
     }
 }

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

@@ -323,6 +323,12 @@ class FavoritesSyncHelper(val context: Context) {
                     EXH_SOURCE_ID)
 
             if(result is GalleryAddEvent.Fail) {
+                if(result is GalleryAddEvent.Fail.NotFound) {
+                    XLog.e("Remote gallery does not exist, skipping: %s!", it.getUrl())
+                    // Skip this gallery, it no longer exists
+                    return@forEachIndexed
+                }
+
                 val errorString = "Failed to add gallery to local database: " + when (result) {
                     is GalleryAddEvent.Fail.Error -> "'${it.title}' ${result.logMessage}"
                     is GalleryAddEvent.Fail.UnknownType -> "'${it.title}' (${result.galleryUrl}) is not a valid gallery!"

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

@@ -43,7 +43,6 @@ class BatchAddPresenter: BasePresenter<BatchAddController>() {
                 eventRelay?.call((when (result) {
                     is GalleryAddEvent.Success -> "[OK]"
                     is GalleryAddEvent.Fail -> "[ERROR]"
-                    else -> "[???]"
                 }) + " " + result.logMessage)
             }