AdminLoginForm.php

<?php

class AdminLoginForm extends CFormModel
{
	public $username;
	public $password;
	public $rememberMe;

	private $_identity;

	public function rules()
	{
		return array(
			// username and password are required
			array('username, password', 'required'),
			// rememberMe needs to be a boolean
			array('rememberMe', 'boolean'),
			// password needs to be authenticated
			array('password', 'authenticate'),
		);
	}

	public function attributeLabels()
	{
		return array(
            'username' => 'E-mail',
            'password' => 'Senha',
			'rememberMe'=>'Lembrar de mim',
		);
	}

	public function authenticate($attribute,$params)
	{
		if(!$this->hasErrors())
		{
			$this->_identity=new AdminIdentity($this->username,$this->password);
			if(!$this->_identity->authenticate()) {
                if($this->_identity->errorCode == AdminIdentity::ERROR_UNKNOWN_IDENTITY) {
                    $this->addError('username', 'Usuário Bloqueado.');
                } else {
                    $this->addError('password','E-maill ou senha incorretos');
                }
            }
		}
	}

	public function login()
	{
		if($this->_identity===null)
		{
			$this->_identity=new AdminIdentity($this->username,$this->password);
			$this->_identity->authenticate();
		}
		if($this->_identity->errorCode===AdminIdentity::ERROR_NONE)
		{
			$duration=$this->rememberMe ? 3600*24*30 : 0; // 30 days
			Yii::app()->getModule('admin')->user->login($this->_identity,$duration);
			return true;
		}
		else
			return false;
	}
}