bookmark-migration-mangadex-v5

The following sample script goes through all your bookmarks and migrate the old MangaDex bookmarks to the new v5 format
This script can be injected directly into HakuNeko (Developer Tools => Console Tab)

⚠️ Before running this script, make sure to backup your bookmark file ⚠️
See: https://hakuneko.download/docs/install/#user-data

(async function() {
    for(let bookmark of Engine.BookmarkManager.bookmarks) {
        if(bookmark.key.connector === 'mangadex' && !bookmark.key.manga.includes('-')) {
            try {
                await new Promise(resolve => setTimeout(resolve, 250)); // throttle, max. 5 req/sec
                const oldID = parseInt(bookmark.key.manga.match(/\d+/));
                const response = await fetch('https://api.mangadex.org/legacy/mapping', {
                    method: 'POST',
                    body: JSON.stringify({ type: 'manga', ids: [ oldID ] }),
                    headers: { 'content-type': 'application/json' }
                });
                const data = await response.json();
                if(data.result === 'ok' && data.data[0].attributes.legacyId === oldID) {
                    bookmark.key.manga = data.data[0].attributes.newId;
                    console.log('Updated:', bookmark.title.manga, '|', oldID, '=>', bookmark.key.manga);
                } else {
                    throw new Error('Failed to get new ID from MangaDex API');
                }
            } catch (error) {
                console.warn('Failed to get new manga ID for: ', bookmark.key.manga, error);
            }
        }
    }
})();

After running, check the output for warnings/errors
If the update failed, simply restart HakuNeko to avoid breaking your bookmark file
If the update was successful, inject the following script to save your migrated bookmark file

Engine.BookmarkManager.saveProfile('default', undefined);