Add RED.plugins module to editor

Gruntfile.js

@@ -142,6 +142,7 @@ module.exports = function(grunt) {
                     "packages/node_modules/@node-red/editor-client/src/js/text/bidi.js",
                     "packages/node_modules/@node-red/editor-client/src/js/text/format.js",
                     "packages/node_modules/@node-red/editor-client/src/js/ui/state.js",
+                    "packages/node_modules/@node-red/editor-client/src/js/plugins.js",
                     "packages/node_modules/@node-red/editor-client/src/js/nodes.js",
                     "packages/node_modules/@node-red/editor-client/src/js/font-awesome.js",
                     "packages/node_modules/@node-red/editor-client/src/js/history.js",

packages/node_modules/@node-red/editor-client/src/js/plugins.js

@@ -0,0 +1,29 @@
+RED.plugins = (function() {
+    var plugins = {};
+    var pluginsByType = {};
+
+    function registerPlugin(id,definition) {
+        plugins[id] = definition;
+        if (definition.type) {
+            pluginsByType[definition.type] = pluginsByType[definition.type] || [];
+            pluginsByType[definition.type].push(definition);
+        }
+        if (definition.onadd && typeof definition.onadd === 'function') {
+            definition.onadd();
+        }
+        RED.events.emit("registry:plugin-added",id);
+    }
+
+    function getPlugin(id) {
+        return plugins[id]
+    }
+
+    function getPluginsByType(type) {
+        return pluginsByType[type] || [];
+    }
+    return {
+        registerPlugin: registerPlugin,
+        getPlugin: getPlugin,
+        getPluginsByType: getPluginsByType
+    }
+})();

test/resources/plugin/test-plugin/test-editor-plugin.html

@@ -1,5 +1,9 @@
 <script type="text/javascript">
     console.log("Loaded test-plugin/test-editor-plugin")
-    // RED.plugins.registerPlugin("")
+    RED.plugins.registerPlugin("my-test-editor-only-plugin", {
-    //
+        type: "bar",
+        onadd: function() {
+            console.log("my-test-editor-only-plugin.onadd called")
+        }
+    })
 </script>