src/fnpjs/actions.js

   1 define(function(require) {
   2
   3 'use strict';
   4
   5 var _ = require('libs/underscore'),
   6     Backbone = require('libs/backbone');
   7
   8 var Action = function(fqName, definition, config, appObject) {
   9     this.fqName = fqName;
  10     this.definition = definition;
  11     this.config = config;
  12     this._cache = null;
  13     this.appObject = appObject;
  14
  15     this.params = {};
  16 };
  17
  18 _.extend(Action.prototype, Backbone.Events, {
  19     getPluginName: function() {
  20         return this.fqName.split('.')[0];
  21     },
  22     updateContextParam: function(contextName, value) {
  23         var changed = false;
  24         _.pairs(this.definition.params).forEach(function(pair) {
  25             var paramName = pair[0],
  26                 paramDesc = pair[1];
  27             if(paramDesc.type === 'context' && paramDesc.name === contextName) {
  28                  this.params[paramName] = value;
  29                  changed = true;
  30             }
  31         }.bind(this));
  32         if(changed) {
  33             this._cache = null;
  34             this.trigger('paramsChanged');
  35         }
  36     },
  37     updateKeyParam: function(keyName, toggled) {
  38         var changed = false;
  39         _.pairs(this.definition.params).forEach(function(pair) {
  40             var paramName = pair[0],
  41                 paramDesc = pair[1];
  42             if(paramDesc.type === 'key' && paramDesc.key === keyName) {
  43                  this.params[paramName] = toggled;
  44                  changed = true;
  45             }
  46         }.bind(this));
  47
  48         if(changed) {
  49             this._cache = null;
  50             this.trigger('paramsChanged');
  51         }
  52     },
  53     updateWidgetParam: function(name, value) {
  54         var paramDesc = this.definition.params[name];
  55         if(paramDesc.type === 'context' || paramDesc.type === 'key') {
  56             throw new Error('');
  57         }
  58         this.params[name] = value;
  59         this._cache = null;
  60         this.trigger('paramsChanged');
  61     },
  62     getState: function() {
  63         var gotState;
  64         if(!this._cache) {
  65             gotState = this.definition.getState.call(this, this.params);
  66             if(typeof gotState === 'boolean') {
  67                 gotState = {allowed: gotState};
  68             }
  69             this._cache = _.extend({}, this.definition.stateDefaults || {}, gotState);
  70         }
  71         if(this._cache === false) {
  72             this._cache = {allowed: false};
  73         }
  74         return this._cache;
  75     },
  76     execute: function() {
  77         var state = this.getState();
  78         if(state.allowed) {
  79             return state.execute.call(this, this.params, this.appObject);
  80         }
  81         throw new Error('Execution not allowed');
  82     }
  83 });
  84
  85
  86 return {
  87     Action: Action
  88 };
  89
  90 });