gistfile1.php

<?php
class TagBehavior extends ModelBehavior {
	var $targetModel = array();
	var $dependModel = array();
	var $transactionModel = array();
	var $dependTransactionModel = array();
	var $countField = array();

	function setup(&$model, $config=array())
	{
		if (isset($config['targetModel'])) {
			$this->targetModel[$model->alias] = $config['targetModel'];
			$this->countField[$model->alias] =
				Inflector::underscore($config['targetModel']).'_count';
			
			$array = array($model->alias, $config['targetModel']);
			sort($array);
			$this->transactionModel[$model->alias] =
				Inflector::pluralize($array[0]).$array[1];
		} else {
			trigger_error(__("TagBehavior: TargetModel is not set in config {$model->alias}.", true), E_USER_ERROR);
		}
		if (isset($config['dependModel'])) {
			$this->dependModel[$model->alias] = $config['dependModel'];
			$array = array($model->alias, $config['dependModel']);
			sort($array);
			$this->dependTransactionModel[$model->alias] =
				Inflector::pluralize($array[0]).$array[1];
		}
	}

	function findDefault(&$model, $options = array(), $fieldName = 'default')
	{
		$conditions = array($model->alias.'.'.$fieldName=>1);
		if (isset($options['conditions'])) {
			$conditions = Set::merge($conditions, $options['conditions']);
		}
		return $model->find('list', compact('conditions'));
	}
	
	function findTop(&$model, $options = array())
	{
		$countField = $this->countField[$model->alias];

		$conditions = array($countField.' >'=>0);
		if (isset($options['conditions'])) {
			$conditions = Set::merge($conditions, $options['conditions']);
		}
		$limit = 30;
		if (isset($options['limit'])) {
			$limit = $options['limit'];
		}

		$order = array($model->alias.'.'.$countField=>'DESC');
		$contain = false;
		$tags = $model->find('all',
			compact('conditions', 'order', 'limit', 'contain'));
		$result = array();
		foreach ($tags as $tag) {
			$result[$tag[$model->alias]['id']] =
				$tag[$model->alias]['name'].
				'('.$tag[$model->alias][$countField].')';
		}
		return $result;
	}
	
	function findWithCount(&$model, $method, $options = array())
	{
		$targetModel = $this->targetModel[$model->alias];
		$transactionModel = $this->transactionModel[$model->alias];
		$fk = $model->hasAndBelongsToMany[$targetModel]['foreignKey'];

		$model->unbindModel(array(
			'hasAndBelongsToMany'=>array($targetModel)));
		$model->bindModel(array(
			'hasOne'=>array(
				$transactionModel=>array(
					'fields'=>array(
						'COUNT('.$transactionModel.'.'.$fk.') AS count',
					),
				),
			),
		));
		$options['group'] = array($model->alias.'.id');
		$order = array('count'=>'DESC');
		if (isset($options['order'])) {
			$options['order'] = array_merge($order, $options['order']);
		} else {
			$options['order'] = $order;
		}
		return $model->find($method, $options);
	}
	
	function updateCount(&$model, $id)
	{
		$countField = $this->countField[$model->alias];

		$conditions = array($model->alias.'.id'=>$id);
		$count = $model->findWithCount('first', compact('conditions'));
		if ($count) {
			$model->id = $id;
			return $model->saveField($countField, $count[0]['count']);
		}
		return true;
	}

	function deleteHabtm(&$model, $id)
	{
		$dependModel = $this->dependModel[$model->alias];
		$dependTransactionModel =
			$this->dependTransactionModel[$model->alias];
		$fk = $model->hasAndBelongsToMany[$dependModel]['foreignKey'];

		$model->unbindModel(array(
			'hasAndBelongsToMany'=>array($dependModel)));
		$model->bindModel(array(
			'hasOne'=>array(
				$dependTransactionModel=>array(
					'fields'=>array(
						'COUNT('.$dependTransactionModel.'.'.$fk.') AS count',
					),
				),
			),
		));
		
		$conditions = array($dependTransactionModel.'.'.$fk=>$id);
		$id = $model->{$dependTransactionModel}->field('id', $conditions);
		if ($id) {
			return $model->{$dependTransactionModel}->delete($id);
		}
		return true;
	}
}
?>