jellyfin-expo/stores/DownloadStore.ts

/**
 * 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 http://mozilla.org/MPL/2.0/.
 */

import { action, computed, decorate, observable } from 'mobx';
import { format } from 'mobx-sync-lite';

import DownloadModel from '../models/DownloadModel';

export const DESERIALIZER = (data: unknown) => {
	const deserialized = new Map<string, DownloadModel>();
	Object.entries(data).forEach(([ key, dl ]) => {
		const model = new DownloadModel(
			dl.itemId,
			dl.serverId,
			dl.serverUrl,
			dl.apiKey,
			dl.title,
			dl.filename,
			dl.downloadUrl
		);
		model.isComplete = dl.isComplete;
		// isDownloading is ignored
		model.isNew = dl.isNew;
		deserialized.set(key, model);
	});
	return deserialized;
};

export default class DownloadStore {
	downloads = new Map<string, DownloadModel>();

	get newDownloadCount() {
		return Array.from(this.downloads.values())
			.filter(d => d.isNew)
			.length;
	}

	add(download: DownloadModel) {
		// Do not allow duplicate downloads
		if (!this.downloads.has(download.key)) {
			this.downloads.set(download.key, download);
		}
	}

	reset() {
		this.downloads = new Map();
	}
}

decorate(DownloadStore, {
	downloads: [
		format(DESERIALIZER),
		observable
	],
	newDownloadCount: computed,
	add: action,
	reset: action
});