gistfile1.txt

class Controller_Element extends Controller {
    function addFields($m){
        $m->addField('name');

        $m->hasOne('Profile','owner_profile_id');
        $m->hasOne('User','created_by');
        $m->addField('element_type');
        $m->addField('descr')->type('text')->caption('Description');

        $m->addField('seo_name');
        $m->addField('tmp_followed_by')->type('int')->defaultValue(0)->caption('Followers');

        $this->owner->addMethod('follow,unfollow',$this);
    }
    function follow($m,Model_Profile $p=null){
        if($p==null)$p=$this->api->myProfile();
        if ($p->id == $m->id) throw $this->exception('You can\'t follow yourself','ForUser');

        $f=$m->ref('Follower','model')
            ->addCondition('profile_id',$p->id)
            ->tryLoadAny();

        if(!$f->loaded()){
            $f->saveAndUnload();
            //$m['tmp_followed_by']=$m['tmp_followed_by']+1;
            $fm = $this->add('Model_Follower');
            $fm->setMasterField('element_id',$m->get('element_id'));
            $m['tmp_followed_by'] = count($fm->getRows());
            $m->saveLater();
        }

        $this->api->al->log('followed',$m,$p);
    }
    function unfollow($m,Model_Profile $p=null){
        if ($this->api->myProfile()->id == $m->id)
            throw $this->exception('You can\'t follow yourself','ForUser');
        if($p==null)$p=$this->api->myProfile();

        $f=$m->ref('Follower','model')
            ->addCondition('profile_id',$p->id)
            ->tryLoadAny();

        if($f->loaded()){
            $f->delete();
            //$m['tmp_followed_by']=$m['tmp_followed_by']-1;
            $fm = $this->add('Model_Follower');
            $fm->setMasterField('element_id',$m->get('element_id'));
            $m['tmp_followed_by'] = count($fm->getRows());
            $m->saveLater();
        }
        $this->api->al->log('stopped following',$m,$p);
    }
}