Feature/download ahead while reading (#464)

* Download next chapters when marking chapter as read while reading

* Add "auto delete chapter" settings

* Delete chapter after finished reading

* Delete chapters after marking them as read

* Improve "mark previous as read" action

Send only ids of chapters that are actually unread

src/util/metadataServerSettings.ts

@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) Contributors to the Suwayomi project
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+import { Metadata, MetadataServerSettings } from '@/typings';
+import { requestManager } from '@/lib/requests/RequestManager.ts';
+import { convertFromGqlMeta, getMetadataFrom } from '@/util/metadata';
+
+export const getDefaultSettings = (): MetadataServerSettings => ({
+    deleteChaptersManuallyMarkedRead: false,
+    deleteChaptersAutoMarkedRead: false,
+    deleteChaptersWithBookmark: false,
+});
+
+const getMetadataServerSettingsWithDefaultFallback = (
+    meta?: Metadata,
+    defaultSettings: MetadataServerSettings = getDefaultSettings(),
+    applyMetadataMigration: boolean = true,
+): MetadataServerSettings => getMetadataFrom({ meta }, defaultSettings, applyMetadataMigration);
+export const useMetadataServerSettings = (): {
+    metadata?: Metadata;
+    settings: MetadataServerSettings;
+    loading: boolean;
+} => {
+    const { data, loading } = requestManager.useGetGlobalMeta();
+    const metadata = convertFromGqlMeta(data?.metas.nodes);
+    const settings = getMetadataServerSettingsWithDefaultFallback(metadata);
+
+    return { metadata, settings, loading };
+};