Prevent concurrent tracker calls during manga migration

src/features/migration/MangaMigration.ts

@@ -25,6 +25,9 @@ import type {
 } from '@/features/chapter/Chapter.types.ts';
 import type { GqlMetaHolder } from '@/features/metadata/Metadata.types.ts';
 import { getMetadataServerSettings } from '@/features/settings/services/ServerSettingsMetadata.ts';
+import { Queue } from '@/lib/Queue.ts';
+import type { TrackerIdInfo } from '@/features/tracker/Tracker.types.ts';
+import { assertIsDefined } from '@/base/Asserts.ts';
 
 type MangaToMigrate = NonNullable<GetMangaToMigrateQuery['manga']>;
 type MangaToMigrateTo = NonNullable<GetMangaToMigrateToFetchMutation['fetchManga']>['manga'];
@@ -43,6 +46,20 @@ const performMigrationAction = async (migrateAction: keyof MigrateAction, ...act
     Promise.all(actions.flatMap((action) => action[migrateAction]()));
 
 export class MangaMigration {
+    private static trackerQueue = new Map<TrackerIdInfo['id'], Queue>();
+
+    private static getOrCreateQueue(trackerId: TrackerIdInfo['id']): Queue {
+        if (!MangaMigration.trackerQueue.has(trackerId)) {
+            MangaMigration.trackerQueue.set(trackerId, new Queue(1));
+        }
+
+        const queue = MangaMigration.trackerQueue.get(trackerId);
+
+        assertIsDefined(queue);
+
+        return queue;
+    }
+
     static async migrate(
         mangaToMigrate: MangaToMigrate | null | undefined,
         mangaToMigrateTo: MangaToMigrateTo | null | undefined,
@@ -281,12 +298,16 @@ export class MangaMigration {
             copy: () =>
                 trackBindingsToAdd.map(
                     (trackRecord) =>
-                        requestManager.bindTracker(
-                            mangaToMigrateTo.id,
-                            trackRecord.trackerId,
-                            trackRecord.remoteId,
-                            trackRecord.private,
-                        ).response,
+                        MangaMigration.getOrCreateQueue(trackRecord.trackerId).enqueue(
+                            String(mangaToMigrate.id),
+                            () =>
+                                requestManager.bindTracker(
+                                    mangaToMigrateTo.id,
+                                    trackRecord.trackerId,
+                                    trackRecord.remoteId,
+                                    trackRecord.private,
+                                ).response,
+                        ).promise,
                 ),
             cleanup: () =>
                 mode === 'migrate'