
<?php /**
 * Tag Behavior class file.
 *
 * Model Behavior to support tags.
 *
 * @filesource
 * @package    app
 * @subpackage    models.behaviors
 */
 
/**
 * Add tag behavior to a model.
 * 
 */
class TagBehavior extends ModelBehavior {
    /**
     * Initiate behaviour for the model using specified settings.
     *
     * @param object $model    Model using the behaviour
     * @param array $settings    Settings to override for model.
     *
     * @access public
     */
    function setup(&$model, $settings = array()) {

	
        $default = array( 'table_label' => 'tags', 'tag_label' => 'tag', 'separator' => ',');
        
        if (!isset($this->settings[$model->name])) {
            $this->settings[$model->name] = $default;
        }
        
	$this->settings[$model->name] = array_merge($this->settings[$model->name], ife(is_array($settings), $settings, array()));

    }
    
    /**
     * Run before a model is saved, used to set up tag for model.
     *
     * @param object $model    Model about to be saved.
     *
     * @access public
     * @since 1.0
     */
    function beforeSave(&$model) {
	// Define the new tag model
	$Tag =& new Tag;
        if ($model->hasField($this->settings[$model->name]['table_label']) 
		&& $Tag->hasField($this->settings[$model->name]['tag_label'])) {


		// Parse out all of the 
		$tag_list = $this->_parseTag($model->data[$model->name][$this->settings[$model->name]['table_label']], $this->settings[$model->name]);
		$tag_info = array(); // New tag array to store tag id and names from db
		foreach($tag_list as $t) {
			if ($res = $Tag->find($this->settings[$model->name]['tag_label'] . " LIKE '" . $t . "'")) {
				$tag_info[] = $res['Tag']['id'];
			} else {
				$Tag->save(array('id'=>'',$this->settings[$model->name]['tag_label']=>$t));
				$tag_info[] = sprintf($Tag->getLastInsertID());
			}
			unset($res);
		}

		// This prepares the linking table data...
		$model->data['Tag']['Tag'] = $tag_info;
		// This formats the tags field before save...
		$model->data[$model->name][$this->settings[$model->name]['table_label']] = implode(', ', $tag_list);
	}
	return true;
    }


    /**
     * Parse the tag string and return a properly formatted array
     *
     * @param string $string    String.
     * @param array $settings    Settings to use (looks for 'separator' and 'length')
     *
     * @return string    Tag for given string.
     *
     * @access private
     */
    function _parseTag($string, $settings) {
        $string = strtolower($string);
       
        $string = preg_replace('/[^a-z0-9' . $settings['separator'] . ' ]/i', '', $string);
        $string = preg_replace('/' . $settings['separator'] . '[' . $settings['separator'] . ']*/', $settings['separator'], $string);

	$string_array = preg_split('/' . $settings['separator'] . '/', $string);
	$return_array = array();

	foreach($string_array as $t) {
		$t = ucwords(trim($t));
		if (strlen($t)>0) {
			$return_array[] = $t;
		}
	}
	
        return $return_array;
    }
}

?>