aboutsummaryrefslogtreecommitdiffstats
path: root/CAN-binder/low-can-demo/app/Frontend/js/AFB.js
blob: aa1198cbdea9800221935aa462c80dae7e2e9c11 (plain)
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
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
AFB = function(base, initialtoken){

var urlws = "ws://"+window.location.host+"/"+base;
var urlhttp = "http://"+window.location.host+"/"+base;

/*********************************************/
/****                                     ****/
/****             AFB_context             ****/
/****                                     ****/
/*********************************************/
var AFB_context = (function() {
	var UUID;
	var TOKEN = initialtoken;

	var context = function(token, uuid) {
		this.token = token;
		this.uuid = uuid;
	};

	context.prototype = {
		get token() {return TOKEN;},
		set token(tok) {if(tok) TOKEN=tok;},
		get uuid() {return UUID;},
		set uuid(id) {if(id) UUID=id;}
	};

	return new context();
})();
/*********************************************/
/****                                     ****/
/****             AFB_websocket           ****/
/****                                     ****/
/*********************************************/
var AFB_websocket = (function() {
	var CALL = 2;
	var RETOK = 3;
	var RETERR = 4;
	var EVENT = 5;

	var PROTO1 = "x-afb-ws-json1";

	var result = function(onopen, onabort) {
		var u = urlws;
		if (AFB_context.token) {
			u = u + '?x-afb-token=' + AFB_context.token;
			if (AFB_context.uuid)
				u = u + '&x-afb-uuid=' + AFB_context.uuid;
		}
		this.ws = new WebSocket(u, [ PROTO1 ]);
		this.pendings = {};
		this.awaitens = {};
		this.counter = 0;
		this.ws.onopen = onopen.bind(this);
		this.ws.onerror = onerror.bind(this);
		this.ws.onclose = onclose.bind(this);
		this.ws.onmessage = onmessage.bind(this);
		this.onopen = onopen;
		this.onabort = onabort;
	};

	function onerror(event) {
		var f = this.onabort;
		if (f) {
			delete this.onopen;
			delete this.onabort;
			f && f(this);
		}
		this.onerror && this.onerror(this);
	}

	function onopen(event) {
		var f = this.onopen;
		delete this.onopen;
		delete this.onabort;
		f && f(this);
	}

	function onclose(event) {
		for (var id in this.pendings) {
			var ferr = this.pendings[id].onerror;
			ferr && ferr(null, this);
		}
		this.pendings = {};
		this.onclose && this.onclose();
	}

	function fire(awaitens, name, data) {
		var a = awaitens[name];
		if (a)
			a.forEach(function(handler){handler(data);});
		var i = name.indexOf("/");
		if (i >= 0) {
			a = awaitens[name.substring(0,i)];
			if (a)
				a.forEach(function(handler){handler(data);});
		}
		a = awaitens["*"];
		if (a)
			a.forEach(function(handler){handler(data);});
	}

	function reply(pendings, id, ans, offset) {
		if (id in pendings) {
			var p = pendings[id];
			delete pendings[id];
			var f = p[offset];
			f && f(ans);
		}
	}

	function onmessage(event) {
		var obj = JSON.parse(event.data);
		var code = obj[0];
		var id = obj[1];
		var ans = obj[2];
		AFB_context.token = obj[3];
		switch (code) {
		case RETOK:
			reply(this.pendings, id, ans, 0);
			break; 
		case RETERR:
			reply(this.pendings, id, ans, 1);
			break; 
		case EVENT:
		default:
			fire(this.awaitens, id, ans);
			break; 
		}
	}

	function close() {
		this.ws.close();
	}

	function call(method, request, onsuccess, onfailure) {
		var id, arr;
		do {
			id = String(this.counter = 4095 & (this.counter + 1));
		} while (id in this.pendings);
		this.pendings[id] = [ onsuccess, onfailure ];
		arr = [CALL, id, method, request ];
		if (AFB_context.token) arr.push(AFB_context.token);
		this.ws.send(JSON.stringify(arr));
	}

	function onevent(name, handler) {
		var id = name;
		var list = this.awaitens[id] || (this.awaitens[id] = []);
		list.push(handler);
	}

	result.prototype = {
		close: close,
		call: call,
		onevent: onevent
	};

	return result;
})();
/*********************************************/
/****                                     ****/
/****                                     ****/
/****                                     ****/
/*********************************************/
return {
	context: AFB_context,
	ws: AFB_websocket
};
};