-
Notifications
You must be signed in to change notification settings - Fork 0
/
observable.js
72 lines (52 loc) · 1.85 KB
/
observable.js
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
63
64
65
66
67
68
69
70
71
72
'use strict';
Object.defineProperty(exports, "__esModule", {
value: true
});
var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
var Observable = function Observable() {
var _this = this;
_classCallCheck(this, Observable);
this.validateTypeHandler = function (type, handler) {
if (typeof type !== 'string') {
throw new Error('Type must be a string');
}
if (typeof handler !== 'function') {
throw new Error('Handler must be a function');
}
};
this.validateTypeMessage = function (type, message) {
if (typeof type !== 'string') {
throw new Error('Type must be a string');
}
if ((typeof message === 'undefined' ? 'undefined' : _typeof(message)) !== 'object') {
throw new Error('Message must be an object');
}
};
this.on = function (type, handler) {
_this.validateTypeHandler(type, handler);
if (!_this.types.has(type)) {
_this.types.set(type, new Set());
}
_this.types.get(type).add(handler);
};
this.off = function (type, handler) {
_this.validateTypeHandler(type, handler);
if (!_this.types.has(type)) {
return;
}
_this.types.get(type).delete(handler);
};
this.emit = function (type, message) {
_this.validateTypeMessage(type, message);
if (!_this.types.has(type)) {
return;
}
var handlers = _this.types.get(type);
handlers.forEach(function (handler) {
return handler(message);
});
};
this.types = new Map();
};
exports.default = Observable;