Added snack messages to show category is already in queue

Also removed the weird enabling logic of the swipe refresh for categories

app/src/main/java/eu/kanade/tachiyomi/data/library/LibraryUpdateService.kt

@@ -131,6 +131,10 @@ class LibraryUpdateService(
 
         private val mangaToUpdate = mutableListOf<LibraryManga>()
 
+        private val categoryIds = mutableSetOf<Int>()
+
+        fun categoryInQueue(id: Int?) = categoryIds.contains(id)
+
         /**
          * Key that defines what should be updated.
          */
@@ -158,7 +162,10 @@ class LibraryUpdateService(
             if (!isRunning(context)) {
                 val intent = Intent(context, LibraryUpdateService::class.java).apply {
                     putExtra(KEY_TARGET, target)
-                    category?.let { putExtra(KEY_CATEGORY, it.id) }
+                    category?.id?.let { id ->
+                        putExtra(KEY_CATEGORY, id)
+                        categoryIds.add(id)
+                    }
                 }
                 if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) {
                     context.startService(intent)
@@ -168,6 +175,7 @@ class LibraryUpdateService(
             }
             else {
                 if (target == Target.CHAPTERS) category?.id?.let {
+                    categoryIds.add(it)
                     val preferences: PreferencesHelper = Injekt.get()
                     val selectedScheme = preferences.libraryUpdatePrioritization().getOrDefault()
                     addManga(getMangaToUpdate(it, target).sortedWith(
@@ -206,6 +214,7 @@ class LibraryUpdateService(
                 db.getLibraryMangas().executeAsBlocking().filter { it.category == categoryId }
             else {
                 val categoriesToUpdate = preferences.libraryUpdateCategories().getOrDefault().map(String::toInt)
+                categoryIds.addAll(categoriesToUpdate)
                 if (categoriesToUpdate.isNotEmpty())
                     db.getLibraryMangas().executeAsBlocking()
                         .filter { it.category in categoriesToUpdate }
@@ -250,6 +259,7 @@ class LibraryUpdateService(
     override fun onDestroy() {
         subscription?.unsubscribe()
         mangaToUpdate.clear()
+        categoryIds.clear()
         if (wakeLock.isHeld) {
             wakeLock.release()
         }
@@ -315,6 +325,7 @@ class LibraryUpdateService(
             job = GlobalScope.launch(Dispatchers.IO, CoroutineStart.DEFAULT) {
                 updateChaptersJob()
                 mangaToUpdate.clear()
+                categoryIds.clear()
                 stopSelf(startId)
             }
         }

app/src/main/java/eu/kanade/tachiyomi/ui/library/LibraryCategoryView.kt

@@ -97,15 +97,6 @@ class LibraryCategoryView @JvmOverloads constructor(context: Context, attrs: Att
         swipe_refresh.addView(recycler)
         adapter.fastScroller = fast_scroller
 
-        recycler.addOnScrollListener(object : RecyclerView.OnScrollListener() {
-            override fun onScrollStateChanged(recycler: RecyclerView, newState: Int) {
-                // Disable swipe refresh when view is not at the top
-                val firstPos = (recycler.layoutManager as LinearLayoutManager)
-                        .findFirstCompletelyVisibleItemPosition()
-                swipe_refresh.isEnabled = firstPos <= 0 && !preferences.hideCategories()
-                    .getOrDefault()
-            }
-        })
         fast_scroller.addOnScrollStateChangeListener {
             controller.lockFilterBar(it)
         }
@@ -120,9 +111,17 @@ class LibraryCategoryView @JvmOverloads constructor(context: Context, attrs: Att
         // Double the distance required to trigger sync
         swipe_refresh.setDistanceToTriggerSync((2 * 64 * resources.displayMetrics.density).toInt())
         swipe_refresh.setOnRefreshListener {
-            LibraryUpdateService.start(context, category)
+            val inQueue = LibraryUpdateService.categoryInQueue(category.id)
             controller.snack?.dismiss()
-            controller.snack = swipe_refresh.snack(R.string.updating_category)
+            controller.snack = swipe_refresh.snack(
+                resources.getString(
+                    when {
+                        inQueue -> R.string.category_already_in_queue
+                        LibraryUpdateService.isRunning(context) -> R.string.adding_category_to_queue
+                        else -> R.string.updating_category_x
+                    }, category.name))
+            if (!inQueue)
+                LibraryUpdateService.start(context, category)
             swipe_refresh.isRefreshing = false
         }
     }

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

@@ -374,7 +374,9 @@
 
     <!-- Library fragment -->
     <string name="updating_library">Updating library</string>
-    <string name="updating_category">Updating category</string>
+    <string name="updating_category_x">Updating %1$s</string>
+    <string name="adding_category_to_queue">Adding %1$s to update queue</string>
+    <string name="category_already_in_queue">%1$s is already in queue</string>
     <string name="local_source_badge">Local</string>
     <string name="confirm_manga_deletion">Remove from library?</string>