76 lines
2.1 KiB
JavaScript
76 lines
2.1 KiB
JavaScript
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/*
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* Copyright (C) 2020 Luciano Iam <lucianito@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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const JSON_INF = 1.0e+128;
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class Connection {
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constructor (host, port) {
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this.socket = new WebSocket(`ws://${host}:${port}`);
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this.socket.onopen = () => this.openCallback();
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this.socket.onclose = () => this.closeCallback();
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this.socket.onerror = (error) => this.errorCallback(error);
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this.socket.onmessage = (event) => this._onMessage(event);
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}
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openCallback () {
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// empty
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}
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closeCallback () {
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// empty
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}
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errorCallback (error) {
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// empty
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}
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messageCallback (node, addr, val) {
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// empty
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}
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send (node, addr, val) {
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for (const i in val) {
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if (val[i] == Infinity) {
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val[i] = JSON_INF;
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} else if (val[i] == -Infinity) {
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val[i] = -JSON_INF;
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}
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}
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const json = JSON.stringify({node: node, addr: addr, val: val});
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this.socket.send(json);
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}
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_onMessage (event) {
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const msg = JSON.parse(event.data);
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for (const i in msg.val) {
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if (msg.val[i] >= JSON_INF) {
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msg.val[i] = Infinity;
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} else if (msg.val[i] <= -JSON_INF) {
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msg.val[i] = -Infinity;
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}
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}
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this.messageCallback(msg.node, msg.addr || [], msg.val);
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}
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}
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