blob: 32f3f33477f331cf863fc4786fa6723d3240a959 (
plain) (
blame)
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
|
/*
* This file is part of caronte (https://github.com/eciavatta/caronte).
* Copyright (c) 2020 Emiliano Ciavatta.
*
* 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, version 3.
*
* 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/>.
*/
const _ = require("lodash");
class Dispatcher {
constructor() {
this.listeners = [];
}
dispatch = (topic, payload) => {
this.listeners.filter((l) => l.topic === topic).forEach((l) => l.callback(payload));
};
register = (topic, callback) => {
if (typeof callback !== "function") {
throw new Error("dispatcher callback must be a function");
}
if (typeof topic === "string") {
this.listeners.push({topic, callback});
} else if (typeof topic === "object" && Array.isArray(topic)) {
topic.forEach((e) => {
if (typeof e !== "string") {
throw new Error("all topics must be strings");
}
});
topic.forEach((e) => this.listeners.push({e, callback}));
} else {
throw new Error("topic must be a string or an array of strings");
}
};
unregister = (callback) => {
_.remove(this.listeners, (l) => l.callback === callback);
};
}
const dispatcher = new Dispatcher();
export default dispatcher;
|
