Add link nodes

nodes/core/core/60-link.html

@@ -0,0 +1,74 @@
+<!--
+  Copyright 2016 IBM Corp.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+  http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+-->
+
+<script type="text/x-red" data-template-name="link in">
+    <div class="form-row">
+        <label for="node-input-event"><i class="fa fa-rss"></i> <span data-i18n="link.label.event"></span></label>
+        <input type="text" id="node-input-event" data-i18n="[placeholder]link.label.event">
+    </div>
+</script>
+<script type="text/x-red" data-help-name="link in">
+    <p>Receive messages from any link nodes that send the specified event.</p>
+</script>
+<script type="text/javascript">
+    RED.nodes.registerType('link in',{
+        category: 'input',
+        color:"#87D8CF",
+        defaults: {
+            event: {value:"",required: true}
+        },
+        inputs:0,
+        outputs:1,
+        icon: "link-out.png",
+        label: function() {
+            return this.event||this._("link.linkIn");
+        },
+        labelStyle: function() {
+            return this.event?"node_label_italic":"";
+        }
+    });
+</script>
+
+<script type="text/x-red" data-help-name="link out">
+    <p>Send a message to any link input nodes listening for a given event.</p>
+</script>
+
+<script type="text/x-red" data-template-name="link out">
+    <div class="form-row">
+        <label for="node-input-event"><i class="fa fa-rss"></i> <span data-i18n="link.label.event"></span></label>
+        <input type="text" id="node-input-event" data-i18n="[placeholder]link.label.event">
+    </div>
+</script>
+
+<script type="text/javascript">
+    RED.nodes.registerType('link out',{
+        category: 'output',
+        color:"#87D8CF",
+        defaults: {
+            event: {value:"",required: true}
+        },
+        align:"right",
+        inputs:1,
+        outputs:0,
+        icon: "link-out.png",
+        label: function() {
+            return this.event||this._("link.linkOut");
+        },
+        labelStyle: function() {
+            return this.event?"node_label_italic":"";
+        }
+    });
+</script>

nodes/core/core/60-link.js

@@ -0,0 +1,52 @@
+/**
+ * Copyright 2016 IBM Corp.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ **/
+
+module.exports = function(RED) {
+    "use strict";
+
+    function LinkInNode(n) {
+        RED.nodes.createNode(this,n);
+        var node = this;
+
+        if (n.event) {
+            var handler = function(msg) {
+                msg._event = n.event;
+                node.receive(msg);
+            }
+            RED.events.on("node:"+n.event,handler);
+            this.on("input", function(msg) {
+                this.send(msg);
+            });
+            this.on("close",function() {
+                RED.events.removeListener("node:"+n.event,handler);
+            })
+        }
+    }
+
+    RED.nodes.registerType("link in",LinkInNode);
+
+    function LinkOutNode(n) {
+        RED.nodes.createNode(this,n);
+        var node = this;
+        if (n.event) {
+            this.on("input", function(msg) {
+                msg._event = n.event;
+                RED.events.emit("node:"+n.event,msg)
+            });
+        }
+    }
+    RED.nodes.registerType("link out",LinkOutNode);
+}

nodes/core/locales/en-US/messages.json

@@ -114,6 +114,13 @@
             "name": "Debug messages"
         }
     },
+    "link": {
+        "linkIn": "link in",
+        "linkOut": "link out",
+        "label": {
+            "event": "Event name"
+        }
+    },
     "exec": {
         "spawnerr": "Spawn command must be just the command - no spaces or extra parameters",
         "badstdout": "Bad STDOUT",

red/runtime/nodes/registry/loader.js

@@ -1,5 +1,5 @@
 /**
- * Copyright 2015 IBM Corp.
+ * Copyright 2015, 2016 IBM Corp.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -67,6 +67,7 @@ function createNodeApi(node) {
         nodes: {},
         log: {},
         settings: {},
+        events: runtime.events,
         util: runtime.util,
         version: runtime.version,
     }