63 lines
1.8 KiB
JavaScript
63 lines
1.8 KiB
JavaScript
|
/*
|
||
|
|
* Copyright (C) 2019 Alex Yatskov <alex@foosoft.net>
|
||
|
|
* Author: Alex Yatskov <alex@foosoft.net>
|
||
|
|
*
|
||
|
|
* This program is free software: you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU General Public License as published by
|
||
|
|
* the Free Software Foundation, either version 3 of the License, or
|
||
|
|
* (at your option) any later version.
|
||
|
|
*
|
||
|
|
* This program is distributed in the hope that it will be useful,
|
||
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
* GNU General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU General Public License
|
||
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
class FrontendApiReceiver {
|
||
|
|
constructor(source='', handlers={}) {
|
||
|
|
this.source = source;
|
||
|
|
this.handlers = handlers;
|
||
|
|
|
||
|
|
chrome.runtime.onConnect.addListener(this.onConnect.bind(this));
|
||
|
|
}
|
||
|
|
|
||
|
|
onConnect(port) {
|
||
|
|
if (port.name !== 'frontend-api-receiver') { return; }
|
||
|
|
|
||
|
|
port.onMessage.addListener(this.onMessage.bind(this, port));
|
||
|
|
}
|
||
|
|
|
||
|
|
onMessage(port, {id, action, params, target}) {
|
||
|
|
if (
|
||
|
|
target !== this.source ||
|
||
|
|
!this.handlers.hasOwnProperty(action)
|
||
|
|
) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
this.sendAck(port, id);
|
||
|
|
|
||
|
|
const handler = this.handlers[action];
|
||
|
|
handler(params).then(
|
||
|
|
result => {
|
||
|
|
this.sendResult(port, id, {result});
|
||
|
|
},
|
||
|
|
e => {
|
||
|
|
const error = typeof e.toString === 'function' ? e.toString() : e;
|
||
|
|
this.sendResult(port, id, {error});
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
sendAck(port, id) {
|
||
|
|
port.postMessage({type: 'ack', id});
|
||
|
|
}
|
||
|
|
|
||
|
|
sendResult(port, id, data) {
|
||
|
|
port.postMessage({type: 'result', id, data});
|
||
|
|
}
|
||
|
|
}
|