fnpjs: actions

[fnpeditor.git] / src / fnpjs / actions.js

diff --git a/src/fnpjs/actions.js b/src/fnpjs/actions.js
new file mode 100644 (file)
index 0000000..8b002bf
--- /dev/null
+++ b/src/fnpjs/actions.js
@@ -0,0 +1,90 @@
+define(function(require) {
+    
+'use strict';
+
+var _ = require('libs/underscore'),
+    Backbone = require('libs/backbone');
+
+var Action = function(fqName, definition, config, appObject) {
+    this.fqName = fqName;
+    this.definition = definition;
+    this.config = config;
+    this._cache = null;
+    this.appObject = appObject;
+
+    this.params = {};
+};
+
+_.extend(Action.prototype, Backbone.Events, {
+    getPluginName: function() {
+        return this.fqName.split('.')[0];
+    },
+    updateContextParam: function(contextName, value) {
+        var changed = false;
+        _.pairs(this.definition.params).forEach(function(pair) {
+            var paramName = pair[0],
+                paramDesc = pair[1];
+            if(paramDesc.type === 'context' && paramDesc.name === contextName) {
+                 this.params[paramName] = value;
+                 changed = true;
+            }
+        }.bind(this));
+        if(changed) {
+            this._cache = null;
+            this.trigger('paramsChanged');
+        }
+    },
+    updateKeyParam: function(keyName, toggled) {
+        var changed = false;
+        _.pairs(this.definition.params).forEach(function(pair) {
+            var paramName = pair[0],
+                paramDesc = pair[1];
+            if(paramDesc.type === 'key' && paramDesc.key === keyName) {
+                 this.params[paramName] = toggled;
+                 changed = true;
+            }
+        }.bind(this));
+
+        if(changed) {
+            this._cache = null;
+            this.trigger('paramsChanged');
+        }
+    },
+    updateWidgetParam: function(name, value) {
+        var paramDesc = this.definition.params[name];
+        if(paramDesc.type === 'context' || paramDesc.type === 'key') {
+            throw new Error('');
+        }
+        this.params[name] = value;
+        this._cache = null;
+        this.trigger('paramsChanged');
+    },
+    getState: function() {
+        var gotState;
+        if(!this._cache) {
+            gotState = this.definition.getState.call(this, this.params);
+            if(typeof gotState === 'boolean') {
+                gotState = {allowed: gotState};
+            }
+            this._cache = _.extend({}, this.definition.stateDefaults || {}, gotState);
+        }
+        if(this._cache === false) {
+            this._cache = {allowed: false};
+        }
+        return this._cache;
+    },
+    execute: function() {
+        var state = this.getState();
+        if(state.allowed) {
+            return state.execute.call(this, this.params, this.appObject);
+        }
+        throw new Error('Execution not allowed');
+    }
+});
+
+
+return {
+    Action: Action
+};
+
+});