git.iko.soy/elk
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elk/libraries/Native/Signal/WebSocket.js
36 lines 981 B history raw
1Elm.Native.WebSocket = {};
2Elm.Native.WebSocket.make = function(elm) {
4 elm.Native = elm.Native || {};
5 elm.Native.WebSocket = elm.Native.WebSocket || {};
6 if (elm.Native.WebSocket.values) return elm.Native.WebSocket.values;
8 var Signal = Elm.Signal.make(elm);
9 var List = Elm.Native.List.make(elm);
11 function open(url, outgoing) {
12 var incoming = Signal.constant("");
13 var ws = new WebSocket(url);
15 var pending = [];
16 var ready = false;
18 ws.onopen = function(e) {
19 var len = pending.length;
20 for (var i = 0; i < len; ++i) { ws.send(pending[i]); }
21 ready = true;
22 };
23 ws.onmessage = function(event) {
24 elm.notify(incoming.id, event.data);
25 };
27 function send(msg) {
28 ready ? ws.send(msg) : pending.push(msg);
29 }
31 function take1(x,y) { return x }
32 return A3(Signal.lift2, F2(take1), incoming, A2(Signal.lift, send, outgoing));
33 }
35 return elm.Native.WebSocket.values = { connect: F2(open) };
36};