WebSockets: shared JS client initial implementation

share/web_surfaces/shared/ardour.js

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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 { Channel } from './channel.js';
+
+export class Ardour {
+
+	constructor () {
+		this.channel = new Channel(location.host);
+	}
+
+	async open () {
+		await this.channel.open();
+	}
+
+	close () {
+		this.channel.close();
+	}
+
+	async getAvailableSurfaces () {
+		const response = await fetch('/index.json');
+		
+		if (response.status == 200) {
+			return await response.json();
+		} else {
+			throw new Error(`HTTP response status ${response.status}`);
+		}
+	}
+
+	// TO DO - add methods for dealing with messages flowing from/to the WebSockets channel
+
+}