git.r.bdr.sh - rbdr/serpentity/blob - lib/serpentity/entity.js

   1 /*
   2  * The entity gives the entity framework its name. It exists only
   3  * to hold components.
   4  */
   5 Class(Serpentity, "Entity")({
   6     prototype : {
   7         _components : null,
   8         _componentKeys : null,
   9
  10         init : function init(config) {
  11             var property;
  12
  13             this._componentKeys = [];
  14             this._components = [];
  15
  16             for (property in config) {
  17                 if (config.hasOwnProperty(property)) {
  18                     this[property] = config[property];
  19                 }
  20             }
  21         },
  22
  23         /*
  24          * Adds a component to the entity.
  25          *
  26          * returns true if added, false if already present
  27          */
  28         add : function add(component) {
  29             if (this._componentKeys.indexOf(component.constructor) >= 0) {
  30                 return false;
  31             }
  32             this._componentKeys.push(component.constructor);
  33             this._components.push(component);
  34             return true;
  35         },
  36
  37         /*
  38          * returns true if component is included, false otherwise
  39          */
  40         hasComponent : function hasComponent(componentClass) {
  41             if (this._componentKeys.indexOf(componentClass) >= 0) {
  42                 return true;
  43             }
  44             return false;
  45         },
  46
  47         /*
  48          * returns the component associated with that key
  49          */
  50          getComponent : function getComponent(componentClass) {
  51             var position;
  52             position = this._componentKeys.indexOf(componentClass);
  53             if (position >= 0) {
  54                 return this._components[position];
  55             }
  56          }
  57     }
  58 });