Added option to clean cache of online covers in advanced

app/src/main/java/eu/kanade/tachiyomi/data/cache/CoverCache.kt

@@ -60,6 +60,10 @@ class CoverCache(val context: Context) {
         return Formatter.formatFileSize(context, DiskUtil.getDirectorySize(cacheDir))
     }
 
+    fun getOnlineCoverCacheSize(): String {
+        return Formatter.formatFileSize(context, DiskUtil.getDirectorySize(onlineCoverDirectory))
+    }
+
     fun deleteOldCovers() {
         GlobalScope.launch(Dispatchers.Default) {
             val db = Injekt.get<DatabaseHelper>()
@@ -86,6 +90,35 @@ class CoverCache(val context: Context) {
         }
     }
 
+    /**
+     * Clear out online covers until its under a certain size
+     */
+    fun deleteAllCachedCovers() {
+        GlobalScope.launch(Dispatchers.IO) {
+            val directory = onlineCoverDirectory
+            val size = DiskUtil.getDirectorySize(directory)
+            if (size <= maxOnlineCacheSize) {
+                return@launch
+            }
+            var deletedSize = 0L
+            val files =
+                directory.listFiles()?.sortedBy { it.lastModified() }?.iterator() ?: return@launch
+            while (files.hasNext()) {
+                val file = files.next()
+                deletedSize += file.length()
+                file.delete()
+            }
+            withContext(Dispatchers.Main) {
+                context.toast(
+                    context.getString(
+                        R.string.deleted_, Formatter.formatFileSize(context, deletedSize)
+                    )
+                )
+            }
+        }
+        lastClean = System.currentTimeMillis()
+    }
+
     /**
      * Clear out online covers until its under a certain size
      */

app/src/main/java/eu/kanade/tachiyomi/ui/setting/SettingsAdvancedController.kt

@@ -75,6 +75,15 @@ class SettingsAdvancedController : SettingsController() {
                 coverCache.deleteOldCovers()
             }
         }
+        preference {
+            titleRes = R.string.clean_up_cached_covers_non_library
+            summary = context.getString(R.string.delete_all_covers__not_in_library_used_, coverCache.getOnlineCoverCacheSize())
+
+            onClick {
+                context.toast(R.string.starting_cleanup)
+                coverCache.deleteAllCachedCovers()
+            }
+        }
         preference {
             titleRes = R.string.clear_cookies
 

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

@@ -562,6 +562,10 @@
     <string name="clean_up_cached_covers">Clean up cached covers</string>
     <string name="delete_old_covers_in_library_used_">Delete old and unused cached covers of
         manga in your library that has been updated.\nCurrently using: %1$s</string>
+    <string name="clean_up_cached_covers_non_library">Clean up cached covers not in
+        library</string>
+    <string name="delete_all_covers__not_in_library_used_">Delete all covers cached that are
+        not in your library \nCurrently using: %1$s</string>
 
     <!-- Browse Settings -->
     <string name="pref_global_search">Global search</string>