@triniwiz/nativescript-downloader/index.ios.js

Download Manager for NativeScript

import { DownloaderBase, StatusCode } from './common';
export class Downloader extends DownloaderBase {
    constructor() {
        super();
        this.downloadsData = new Map();
    }
    static setTimeout(timeout) {
        NSCDownloader.timeOut = timeout;
    }
    createDownload(options) {
        if (options && !options.url)
            throw new Error('Url missing');
        let url;
        let query;
        if (options.query) {
            if (typeof options.query === 'object') {
                const keysArray = Object.keys(options.query);
                query = '';
                for (const key of keysArray) {
                    query += key + '=' + options.query[key] + '&';
                }
            }
            else if (typeof options.query === 'string') {
                query = options.query;
            }
            url = encodeURI(options.url + query);
        }
        else {
            url = options.url;
        }
        const ref = new WeakRef(this);
        const id = NSCDownloader.createDownload(url, options.path ?? null, options.fileName ?? null, options.headers ?? null, (id, current, speed, currentBytes, totalBytes) => {
            const owner = ref.deref();
            if (owner.downloadsData.has(id)) {
                const data = owner.downloadsData.get(id);
                const callback = data.callback;
                if (callback && typeof callback === 'function') {
                    callback({
                        value: current,
                        speed: speed,
                        currentSize: currentBytes,
                        totalSize: totalBytes,
                    });
                }
            }
        }, (id, path, error) => {
            const owner = ref.deref();
            if (error) {
                if (owner.downloadsData.has(id)) {
                    const data = owner.downloadsData.get(id);
                    const reject = data.reject;
                    owner.downloadsData.set(id, Object.assign({}, data, {
                        status: StatusCode.ERROR,
                    }));
                    reject({
                        status: StatusCode.ERROR,
                        message: error,
                    });
                }
            }
            else {
                if (owner.downloadsData.has(id)) {
                    const data = owner.downloadsData.get(id);
                    const resolve = data.resolve;
                    owner.downloadsData.set(id, Object.assign({}, data, {
                        status: StatusCode.COMPLETED,
                    }));
                    resolve({
                        status: StatusCode.COMPLETED,
                        message: null,
                        path,
                    });
                }
            }
        });
        this.downloadsData.set(id, {});
        return id;
    }
    start(id, progress) {
        return new Promise((resolve, reject) => {
            if (id && NSCDownloader.has(id)) {
                const data = this.downloadsData.get(id);
                this.downloadsData.set(id, Object.assign({}, data, {
                    reject: reject,
                    resolve: resolve,
                    callback: progress,
                }));
                NSCDownloader.start(id);
            }
            else {
                reject({ message: 'Download ID not found.' });
            }
        });
    }
    getStatus(id) {
        switch (NSCDownloader.getStatus(id)) {
            case 0:
                return StatusCode.PENDING;
            case 1:
                return StatusCode.PAUSED;
            case 2:
                return StatusCode.DOWNLOADING;
            case 3:
                return StatusCode.COMPLETED;
            case 4:
                return StatusCode.ERROR;
            default:
                return StatusCode.PENDING;
        }
    }
    pause(id) {
        NSCDownloader.pause(id);
    }
    resume(id) {
        NSCDownloader.resume(id);
    }
    cancel(id) {
        NSCDownloader.cancel(id);
    }
    getPath(id) {
        return NSCDownloader.getPath(id);
    }
}
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