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/*
* 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});
}
}
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