UserLogin.php

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<?php

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

    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(
            'rememberMe' => UserModule::t("Remember me next time"),
            'username' => UserModule::t("username or email"),
            'password' => UserModule::t("password"),
        );
    }

    public function authenticate($attribute, $params)
    {
        if (!$this->hasErrors()) {
            // we only want to authenticate when no input errors

            $identity = new UserIdentity($this->username, $this->password);
            $identity->authenticate();
            switch ($identity->errorCode) {
                case UserIdentity::ERROR_NONE:
                    $duration = $this->rememberMe ? Yii::app()->controller->module->rememberMeTime : 0;
                    Yii::app()->user->login($identity, $duration);
                    break;
                case UserIdentity::ERROR_EMAIL_INVALID:
                    $this->addError("username", UserModule::t("Email is incorrect."));
                    break;
                case UserIdentity::ERROR_USERNAME_INVALID:
                    $this->addError("username", UserModule::t("Username is incorrect."));
                    break;
                case UserIdentity::ERROR_STATUS_NOTACTIV:
                    $this->addError("status", UserModule::t("You account is not activated."));
                    break;
                case UserIdentity::ERROR_STATUS_BAN:
                    $this->addError("status", UserModule::t("You account is blocked."));
                    break;
                case UserIdentity::ERROR_PASSWORD_INVALID:
                    $this->addError("password", UserModule::t("Password is incorrect."));
                    break;
            }
        }
    }
}