1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
/*
* 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, senderId}) {
if (
target !== this.source ||
!this.handlers.hasOwnProperty(action)
) {
return;
}
this.sendAck(port, id, senderId);
const handler = this.handlers[action];
handler(params).then(
result => {
this.sendResult(port, id, senderId, {result});
},
e => {
const error = typeof e.toString === 'function' ? e.toString() : e;
this.sendResult(port, id, senderId, {error});
});
}
sendAck(port, id, senderId) {
port.postMessage({type: 'ack', id, senderId});
}
sendResult(port, id, senderId, data) {
port.postMessage({type: 'result', id, senderId, data});
}
}
|