<?php

class Mapper_User extends Fiktiv_Model_Mapper_DbTableAbstract
{

    protected function _createUser($object)
    {

        if ($object instanceof stdClass)
            $object = (array) $object;
        

        if ($object instanceof Zend_Db_Table_Row)
            $object = $object->toArray();

        
        $user = null;

        if (is_array($object))
            $user = new User($object);

        return $user;
    }


    public function findById($id)
    {
        if (is_numeric($id)) {
            return $this->_createUser($this->_dbTable->find($id)->current());
        }
    }

    /**
     * Fetch user based on email
     *
     * @return User
     */
    public function findByEmail($email)
    {
        // Atleast 6 character long
        if (is_string($email) && isset($email[5])) {
            
            $user = $this->_createUser($this->_dbTable->fetchRow($this->_dbTable->getAdapter()->quoteInto('email = ?', $email)));

            return $user;
        }

        return null;
    }

    /**
     * Get random user
     *
     * @return User
     */
    public function findRandom()
    {
         return $this->_createUser($this->_dbTable->fetchAll(null, 'RAND()', 1)->current());
    }

    
    /**
     * Authenticate user
     *
     * @param string $email
     * @param string $password
     */
    public function login($email, $password)
    {
        $auth = Zend_Auth::getInstance();

        // Setup auth adapter
        $authAdapter = new Zend_Auth_Adapter_DbTable($this->_dbTable->getAdapter(), $this->_dbTable->_name, 'email', 'password');

        // Set credentials
        $authAdapter->setIdentity($email);
        $authAdapter->setCredential(hash('sha256',$password));

        // Authenticate
        $result = $auth->authenticate($authAdapter);
        
        // Check result
        if ($result->isValid()) {
            
            // Keep all but password and salt in session.
            $storage = $auth->getStorage();
            $storage->write($this->_createUser($authAdapter->getResultRowObject(null, array('password', 'salt'))));
            
            return true;
        }

        return false;
    }


    /**
     * Change password
     */
    public function setPassword($userId, $password)
    {

        if ($userId instanceof User)
            $userId = $userId->getId();

        if (!is_numeric($userId))
            return false;

        return $this->_dbTable->update(
                array(
                    'password' => hash('sha256',$password)
                ),
                $this->_dbTable->getAdapter()->quoteInto('id = ?',$userId)
        );
    }


    /**
     * Save User object
     */
    public function save(User $user)
    {
        $data = $user->toArray();
        unset($data['id']);
        
        return $this->_dbTable->update($data,
            $this->_dbTable->getAdapter()->quoteInto('id = ?',$user->getId())
        );
    }
    
}