feat(devices): handle yeelight basic support

Delete gateway in action config.
Close #4, #8 and #9

node-red-contrib-xiaomi-yeelight/xiaomi-yeelight.html

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+<script type="text/javascript">
+    RED.nodes.registerType('xiaomi-yeelight out', {
+        category: 'xiaomi in out',
+        color: '#087F8A',
+        defaults: {
+            name: {value: ""},
+            ip: {value: ""},
+            port: {value:55443, required: true}
+        },
+        inputs: 1,
+        outputs: 0,
+        paletteLabel: "yeelight out",
+        icon: "mi-yeelight.png",
+        align: "right",
+        label: function () {
+            return this.name || "yeelight out";
+        }
+    });
+</script>
+
+<script type="text/x-red" data-template-name="xiaomi-yeelight out">
+    <div class="form-row">
+        <label for="node-input-name"><i class="icon-tag"></i> Name</label>
+        <input type="text" id="node-input-name" placeholder="Name">
+    </div>
+    <div class="form-row">
+        <label for="node-input-ip"><i class="icon-tag"></i> IP</label>
+        <input type="text" id="node-input-ip" placeholder="IP">
+    </div>
+    <div class="form-row">
+        <label for="node-input-port"><i class="icon-tag"></i> Port</label>
+        <input type="text" id="node-input-port" placeholder="Port">
+    </div>
+</script>
+
+<script type="text/x-red" data-help-name="xiaomi-yeelight out">
+    <p>The Xiaomi Yeelight node</p>
+
+    <h3>Inputs</h3>
+    <dl class="message-properties">
+        <dt>payload
+            <span class="property-type">object</span>
+        </dt>
+        <dd>
+            When the message contains a <code>sid</code> field, the node will filter the input and output only if the <code>sid</code> is the device's sid.<br>
+            <hr>
+            If the message doesn't contain a <code>sid</code> field, the node will be used to inject <code>sid</code> and <code>gateway</code> fields in the incoming <code>msg</code>.<br>
+            <hr>
+            Input Gateway node produces message of type <code>read_ack</code>, <code>heartbeat</code> or <code>report</code>.
+        </dd>
+    </dl>
+
+    <h3>Outputs</h3>
+    <ol class="node-ports">
+        <dl class="message-properties">
+            <dt>payload <span class="property-type">object</span></dt>
+            <dd>Data from gateway when used as a filter (see below).</dd>
+            <dt>sid <span class="property-type">string</span></dt>
+            <dd>Device SID.</dd>
+            <dt>gateway <span class="property-type">object</span></dt>
+            <dd>The <code>xiaomi-configurator</code> object where the device is registred.</dd>
+        </dl>
+    </ol>
+
+    <h4>Details</h4>
+    <p>The incoming message is processed if the input <code>sid</code> matches the configured value for this device.</p>
+    <p>Sample message:</p>
+    <p><pre>{
+  cmd: "report"
+  model: "switch"
+  sid: "158d000128b124"
+  short_id: 56773
+  data: {
+    status: "click",
+    batteryLevel: 23
+  }
+}</pre></p>
+
+</script>

node-red-contrib-xiaomi-yeelight/xiaomi-yeelight.js

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+const miDevicesUtils = require('../src/utils');
+const Yeelight = require("yeelight2");
+
+module.exports = (RED) => {
+    function XiaomiYeelightOutputNode(config) {
+        RED.nodes.createNode(this, config);
+        this.ip = config.ip;
+        this.port = config.port;
+
+        this.status({fill:"grey", shape:"ring", text:"na"});
+
+        this.setupConnection = function(){
+            try {
+                this.light = Yeelight(`yeelight://${this.ip}:${this.port}`);
+                this.status({fill:"blue", shape:"dot", text:"connected"});
+            } catch(err) {
+                this.status({fill:"red",shape:"ring",text:err.message});
+                this.light = null;
+                this.error(err);
+
+                // try to reconnect in 5 minutes
+                window.setTimeout((function(self) {
+                     return function() {
+                            self.setupConnection.apply(self, arguments);
+                        }
+                })(this), 1000*60*5);
+            }
+        }
+
+        if (this.ip && this.port) {
+            this.setupConnection(); 
+            this.on('input', (msg) => {
+                if(msg.payload === "on") {
+                    this.light && this.light.set_power('on');
+                }
+                else if(msg.payload === "off") {
+                    this.light && this.light.set_power('off');
+                }
+                else if(msg.payload === "toggle") {
+                    this.light && this.light.toggle();
+                }
+
+                if(msg.payload.color !== undefined) {
+                    this.light && this.light.set_rgb(msg.payload.color);
+                }
+                if(msg.payload.brightness !== undefined) {
+                    this.light && this.light.set_bright(msg.payload.brightness);
+                }
+            });
+
+            this.on('close', () => {
+                this.light && this.light.exit();
+            });
+        }
+    }
+    RED.nodes.registerType("xiaomi-yeelight out", XiaomiYeelightOutputNode);
+};