148 lines
3.8 KiB
JavaScript
148 lines
3.8 KiB
JavaScript
'use strict';
|
|
const path = require('path');
|
|
const {app, BrowserWindow, shell, dialog} = require('electron');
|
|
const unusedFilename = require('unused-filename');
|
|
const pupa = require('pupa');
|
|
const extName = require('ext-name');
|
|
|
|
function getFilenameFromMime(name, mime) {
|
|
const exts = extName.mime(mime);
|
|
|
|
if (exts.length !== 1) {
|
|
return name;
|
|
}
|
|
|
|
return `${name}.${exts[0].ext}`;
|
|
}
|
|
|
|
function registerListener(session, options, cb = () => {}) {
|
|
const downloadItems = new Set();
|
|
let receivedBytes = 0;
|
|
let completedBytes = 0;
|
|
let totalBytes = 0;
|
|
const activeDownloadItems = () => downloadItems.size;
|
|
const progressDownloadItems = () => receivedBytes / totalBytes;
|
|
|
|
options = Object.assign({
|
|
showBadge: true
|
|
}, options);
|
|
|
|
const listener = (e, item, webContents) => {
|
|
downloadItems.add(item);
|
|
totalBytes += item.getTotalBytes();
|
|
|
|
let hostWebContents = webContents;
|
|
if (webContents.getType() === 'webview') {
|
|
({hostWebContents} = webContents);
|
|
}
|
|
|
|
const win = BrowserWindow.fromWebContents(hostWebContents);
|
|
|
|
const dir = options.directory || app.getPath('downloads');
|
|
let filePath;
|
|
if (options.filename) {
|
|
filePath = path.join(dir, options.filename);
|
|
} else {
|
|
const filename = item.getFilename();
|
|
const name = path.extname(filename) ? filename : getFilenameFromMime(filename, item.getMimeType());
|
|
|
|
filePath = unusedFilename.sync(path.join(dir, name));
|
|
}
|
|
|
|
const errorMessage = options.errorMessage || 'The download of {filename} was interrupted';
|
|
const errorTitle = options.errorTitle || 'Download Error';
|
|
|
|
if (!options.saveAs) {
|
|
item.setSavePath(filePath);
|
|
}
|
|
|
|
if (typeof options.onStarted === 'function') {
|
|
options.onStarted(item);
|
|
}
|
|
|
|
item.on('updated', () => {
|
|
receivedBytes = [...downloadItems].reduce((receivedBytes, item) => {
|
|
receivedBytes += item.getReceivedBytes();
|
|
return receivedBytes;
|
|
}, completedBytes);
|
|
|
|
if (options.showBadge && ['darwin', 'linux'].includes(process.platform)) {
|
|
app.setBadgeCount(activeDownloadItems());
|
|
}
|
|
|
|
if (!win.isDestroyed()) {
|
|
win.setProgressBar(progressDownloadItems());
|
|
}
|
|
|
|
if (typeof options.onProgress === 'function') {
|
|
options.onProgress(progressDownloadItems());
|
|
}
|
|
});
|
|
|
|
item.on('done', (event, state) => {
|
|
completedBytes += item.getTotalBytes();
|
|
downloadItems.delete(item);
|
|
|
|
if (options.showBadge && ['darwin', 'linux'].includes(process.platform)) {
|
|
app.setBadgeCount(activeDownloadItems());
|
|
}
|
|
|
|
if (!win.isDestroyed() && !activeDownloadItems()) {
|
|
win.setProgressBar(-1);
|
|
receivedBytes = 0;
|
|
completedBytes = 0;
|
|
totalBytes = 0;
|
|
}
|
|
|
|
if (options.unregisterWhenDone) {
|
|
session.removeListener('will-download', listener);
|
|
}
|
|
|
|
if (state === 'cancelled') {
|
|
if (typeof options.onCancel === 'function') {
|
|
options.onCancel(item);
|
|
}
|
|
} else if (state === 'interrupted') {
|
|
const message = pupa(errorMessage, {filename: item.getFilename()});
|
|
dialog.showErrorBox(errorTitle, message);
|
|
cb(new Error(message));
|
|
} else if (state === 'completed') {
|
|
if (process.platform === 'darwin') {
|
|
app.dock.downloadFinished(filePath);
|
|
}
|
|
|
|
if (options.openFolderWhenDone) {
|
|
shell.showItemInFolder(path.join(dir, item.getFilename()));
|
|
}
|
|
|
|
cb(null, item);
|
|
}
|
|
});
|
|
};
|
|
|
|
session.on('will-download', listener);
|
|
}
|
|
|
|
module.exports = (options = {}) => {
|
|
app.on('session-created', session => {
|
|
registerListener(session, options);
|
|
});
|
|
};
|
|
|
|
// TODO: Remove this for the next major release
|
|
module.exports.default = module.exports;
|
|
|
|
module.exports.download = (win, url, options) => new Promise((resolve, reject) => {
|
|
options = Object.assign({}, options, {unregisterWhenDone: true});
|
|
|
|
registerListener(win.webContents.session, options, (err, item) => {
|
|
if (err) {
|
|
reject(err);
|
|
} else {
|
|
resolve(item);
|
|
}
|
|
});
|
|
|
|
win.webContents.downloadURL(url);
|
|
});
|