<?php

/* Please see the README and LICENSE files. */

/**
 * Represents a specific group of information. A data object
 */
class Data_Model {
    /**
     * The attributes associated with this
     * @var Data_Attribute[]
     */
    protected $attributes = array();
    
    /**
     * The name of this object
     * @var String
     */
    protected $name;
    
    /**
     * @param String $name 
     */
    public function __construct($name){
        $this->name = $name;
    }
    
    /**
     * Adds an attribute to the object
     * @param Data_Attribute $attribute
     * @param String $name 
     */
    public function add_attribute($attribute,$name=NULL){
        $this->attributes[$name==NULL?$attribute->name:$name] = $attribute;
    }
    
    /**
     * Gets an attribute
     * @param String $name
     * @return Data_Attibute
     */
    public function get_attribute($name){
        if(array_key_exists($name)){
            return $this->attributes[$name];
        }
    }
    
    /**
     * Gets all of the attributes
     * @return Data_Attribute[]
     */
    public function get_attributes(){
        return $this->attributes;
    }
    
    
    /**
     * Allows for -> referencing of attributes as a shortcut
     * Ex.
     *     $model->attributeFoo->value
     * 
     * @param String $name Whatever comes after the ->
     * @return Mixed
     */
    public function __get($name){
        switch($name){
            case "name":
            case "attributes":
                return $this->$name;
                break;
            default:
                return @$this->attributes[$name];
        }
    }
    
    /**
     * Allows for -> setting of attributes as a shortcut
     * Ex.
     *     $model->attribute->value = $val
     * 
     * @param String $name Whatever comes after the ->
     * @param Mixed $value Whatever is after the = 
     */
    public function __set($name,$value){
        # TODO
    }
    
    /**
     * Check if the model has changed in storage
     * @return Boolean
     */
    public function has_changed(){
        foreach($this->attributes as $attribute){
            if($attribute->has_changed()){
                return true;
            }
        }
    }
}

?>