Scope behavior

This behavior allow to limit selected and update rows of model with some scope.

Example of using if you want to scope articles with scope user_id then in beforeFiler of ArticlesController we place next code.
Value ‘User.id’ placed into session during login.


   $this->Article->scopeSetup(array('user_id'=>$this->Session->read('User.id')));
   $this->Article->scopeEnable();


After this all insert and read will scoped with user_id value. 
Now for example possible to call $this->paginate() without any additional conditions.

Also before create and delete record behavior check that record from required scope. 

<?php /* 
 * Scope behavior for cakePHP 
 * comments, bug reports are welcome skie AT mail DOT ru 
 * @author Yevgeny Tomenko aka SkieDr 
 * @version 1.0.0.1 
 
 configuration is
 
 1)  array (’scope’ => array(‘parent_id’=>$parentIdValue, ’secondParent’=> $secondParentValue), ’enabled’ => true);
 
  2) array(‘parent_id’=>$parentIdValue, ’secondParent’=> $secondParentValue);   3) array (‘enabled’ => false);
  
 */ 

class ScopeBehavior extends ModelBehavior {     var $settings = null

;
    
    function setup(&$model, $config = array()) {
        $this->scopeSetup(&$model, $config);
    }
    
    function scopeSetup(&$model, $config = array()) {
        $settings = array(‘enabled’=>true);
        if (isset($config['scope'])) {
            $settings['scope']=$config['scope'];
        } else{
            $settings['scope']=$config;
        }
        if (isset($config['enabled'])) {
            $settings['enabled']=$config['enabled'];
        }        
        $this->settings[$model->name] = $settings;
    }
    
    function scopeEnable (&$model){
        $this->settings[$model->name]['enabled'] = true;        
    }     function scopeDisable (&$model){
        $this->settings[$model->name]['enabled'] = false;        
    }
    
    /**
     * Before find method. Called before all find
     *
     * Set scope filer settings
     *
     * @param AppModel $model
     * @return boolean True to continue, false to abort the save
     */ 
    function beforeFind(&$model, $cond) {
        if (!$this->settings[$model->name]['enabled']) return true;
        if (!is_array($cond['conditions'])) {
            $cond['conditions']=array($cond['conditions']);
        }
        foreach ($this->settings[$model->name]['scope'] as $key => $value) {
            $cond['conditions'][$model->name.'.'.$key]=$value;
        }    
        return $cond;
    }      function beforeSave(&$model

) {
        if (!$this->settings[$model->name]['enabled']) return true;
        if (empty($model->data[$model->name][$model->primaryKey])) { //add
            foreach ($this->settings[$model->name]['scope'] as $key => $value) {
                $model->data[$model->name][$key]=$value;
            }
        } else { //update
            // now nothing to do
        }
        return true;
    }      function beforeDelete(&$model) {        
        if (!$this->settings[$model->name]['enabled']) return true;
        
        if ($model->id!==false) {
            $curr=$model->read(null,$model->id);
        }
        
        foreach ($this->settings[$model->name]['scope'] as $key => $value) {
            if ($curr[$model->name][$key]!=$value) return false;
        }
        
        return true;
    } 
    
}
?>