initial commit

magnus/core/commands.js

@@ -0,0 +1,85 @@
+"use strict";
+
+var ModelVocabulary = require("../lib/wModel/vocabulary");
+
+var Vocabulary = require("../lib/wType/vocabulary");
+var String = require("../lib/wType/string");
+
+var Commands = ModelVocabulary.inherit({
+    "className": "Commands",
+    "constructor": function(address) {
+        ModelVocabulary.fn.constructor.call(this, address);
+        
+        this._commands = global.Object.create(null);
+    },
+    "destructor": function() {
+        for (var key in this._commands) {
+            var cmd = this._commands[key];
+            if (cmd.enabled) {
+                this._removeHandler(cmd.handler);
+            }
+            cmd.name.destructor();
+            cmd.handler.destructor();
+            cmd.arguments.destructor();
+            delete this._commands[key];
+        }
+        
+        ModelVocabulary.fn.destructor.call(this);
+    },
+    "addCommand": function(key, handler, args) {
+        if (this._commands[key]) {
+            throw new Error("Command with this key already exist");
+        }
+        this._commands[key] = {
+            name: new String(key),
+            handler: handler,
+            arguments: args,
+            enabled: false
+        }
+    },
+    "_disableCommand": function(cmd) {
+        this._removeHandler(cmd.handler);
+        cmd.enabled = false;
+        this.erase(cmd.name.toString());
+    },
+    "enableCommand": function(key, value) {
+        var cmd = this._commands[key];
+        
+        if (!cmd) {
+            throw new Error("An attempt to access non existing command: " + key);
+        }
+    
+        if (cmd.enabled !== value) {
+            if (value) {
+                this._enableCommand(cmd);
+            } else {
+                this._disableCommand(cmd);
+            }
+        }
+    },
+    "_enableCommand": function(cmd) {
+        this._addHandler(cmd.handler);
+        cmd.enabled = true;
+        
+        var vc = new Vocabulary();
+        vc.insert("address", cmd.handler.address.clone());
+        vc.insert("arguments", cmd.arguments.clone());
+        
+        this.insert(cmd.name.toString(), vc);
+    },
+    "removeCommand": function(name) {
+        var cmd = this._commands[name];
+        if (cmd === undefined) {
+            throw new Error("An attempt to access non existing command: " + key);
+        }
+        if (cmd.enabled) {
+            this._disableCommand(cmd);
+        }
+        cmd.name.destructor();
+        cmd.handler.destructor();
+        cmd.arguments.destructor();
+        delete this._commands[name];
+    }
+});
+
+module.exports = Commands;