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Add once() to clientside ws shim

This commit is contained in:
Calvin Montgomery 2018-06-23 16:39:57 -07:00
parent 17911d43fc
commit 07502575eb
1 changed files with 17 additions and 0 deletions
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17
www/js/ws.js
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@ -27,6 +27,11 @@
this.listeners(frame).push(callback);
};
WSShim.prototype.once = function on(frame, callback) {
callback._once = true;
this.listeners(frame).push(callback);
};
WSShim.prototype.emit = function emit(frame, payload, ack) {
var message = {
type: TYPE_FRAME,
@ -43,13 +48,25 @@
};
WSShim.prototype._emit = function _emit(frame, payload) {
var hasOnce = false;
this.listeners(frame).forEach(function (cb) {
try {
if (cb._once) {
hasOnce = true;
}
cb(payload);
} catch (error) {
console.error('Error in callback for ' + frame + ': ' + error);
}
});
if (hasOnce) {
this._listeners[frame] = this._listeners[frame].filter(function (cb) {
return !cb._once;
});
}
};
WSShim.prototype._onopen = function _onopen() {