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/*
* Copyright (C) 2017 "IoT.bzh"
* Author: José Bollo <jose.bollo@iot.bzh>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
AFB = function(base, initialtoken){
if (typeof base != "object")
base = { base: base, token: initialtoken };
var initial = {
base: base.base || "api",
token: base.token || initialtoken || "hello",
host: base.host || window.location.host,
url: base.url || undefined
};
var urlws = initial.url || "ws://"+initial.host+"/"+initial.base;
/*********************************************/
/**** ****/
/**** AFB_context ****/
/**** ****/
/*********************************************/
var AFB_context;
{
var UUID = undefined;
var TOKEN = initial.token;
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;}
};
AFB_context = new context();
}
/*********************************************/
/**** ****/
/**** AFB_websocket ****/
/**** ****/
/*********************************************/
var AFB_websocket;
{
var CALL = 2;
var RETOK = 3;
var RETERR = 4;
var EVENT = 5;
var PROTO1 = "x-afb-ws-json1";
AFB_websocket = function(on_open, on_abort) {
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.url = u;
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 = on_open;
this.onabort = on_abort;
}
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) {
try { this.pendings[id][1](); } catch (x) {/*TODO?*/}
}
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];
try { p[offset](ans); } catch (x) {/*TODO?*/}
}
}
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();
this.ws.onopen =
this.ws.onerror =
this.ws.onclose =
this.ws.onmessage =
this.onopen =
this.onabort = function(){};
}
function call(method, request, callid) {
return new Promise((function(resolve, reject){
var id, arr;
if (callid) {
id = String(callid);
if (id in this.pendings)
throw new Error("pending callid("+id+") exists");
} else {
do {
id = String(this.counter = 4095 & (this.counter + 1));
} while (id in this.pendings);
}
this.pendings[id] = [ resolve, reject ];
arr = [CALL, id, method, request ];
if (AFB_context.token) arr.push(AFB_context.token);
this.ws.send(JSON.stringify(arr));
}).bind(this));
}
function onevent(name, handler) {
var id = name;
var list = this.awaitens[id] || (this.awaitens[id] = []);
list.push(handler);
}
AFB_websocket.prototype = {
close: close,
call: call,
onevent: onevent
};
}
/*********************************************/
/**** ****/
/**** ****/
/**** ****/
/*********************************************/
return {
context: AFB_context,
ws: AFB_websocket
};
};
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