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/*
* Copyright © 2020 Luciano Iam <lucianito@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
import { ANode, Message } from './message.js';
export class MessageChannel {
constructor (host) {
// https://developer.mozilla.org/en-US/docs/Web/API/URL/host
this._host = host;
}
async open () {
return new Promise((resolve, reject) => {
this._socket = new WebSocket(`ws://${this._host}`);
this._socket.onclose = () => this.closeCallback();
this._socket.onerror = (error) => this.errorCallback(error);
this._socket.onmessage = (event) => {
this.messageCallback (Message.fromJsonText(event.data));
};
this._socket.onopen = resolve;
});
}
async close () {
this._socket.close();
}
send (msg) {
if (this._socket) {
this._socket.send(msg.toJsonText());
} else {
throw Error('MessageChannel: cannot call send() before open()');
}
}
closeCallback () {
// empty
}
errorCallback (error) {
// empty
}
messageCallback (msg) {
// empty
}
}
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