<?php
/**
 * User
 *
 * $Id$
 *
 * @author gERD Schaufelberger <gerd@php-tools.net>
 * @license PHP License
 * @package WB
 * @subpackage content
 */

/**
 * User
 *
 *
 *
 * @version 0.5.0
 * @package WB
 * @subpackage content
 */
class WBUser extends WBStdClass
{
   /**
    * id of current user
    * @var string
    */
    protected $id = null;

   /**
    * current user's primary data
    * @var array
    */
    protected $data = array();

   /**
    * groups the current user is member
    * @var array
    */
    protected $group = array();

   /**
    * storage module
    * @var WBUser_Storage
    */
    protected $storage;

    /**
     * switch to show whether config was loaded
     * @var bool
     */
    private $configLoaded = false;

    /**
     * basic config for user data
     *
     * @var array
     */
    protected $config   =   array(
                            'fields'  =>  array(
                                'editable'  =>  array(
                                                    'nickname',
                                                    'password',
                                                    'email',
                                                    'forename',
                                                    'surname',
                                                    'lang',
                                                    'country'
                                                ),
                                'required'  =>  array(
                                                    'nickname',
                                                    'password',
                                                    'email'
                                                )
                                    )
                );

    /**
     * get current user object
     *
     * @return WBUser_Auth
     */
    static public function getCurrent()
    {
        WBClass::load('WBUser_Auth');
        return WBUser_Auth::getCurrent();
    }

    /**
     * Load user system settings
     *
     * Make sure config is loaded only once
     */
    protected function loadConfig()
    {
        if ($this->configLoaded) {
            return;
        }
        $this->configLoaded  =   true;

        $config  =   WBClass::create('WBConfig');
        if (!$config->load('user/config', true)) {
            return;
        }

       $this->config['fields']['editable']  =   $config->get('fields/editable', $this->config['fields']['editable']);
       $this->config['fields']['required']  =   $config->get('fields/required', $this->config['fields']['required']);
    }

    /**
     * get user's id
     *
     * @return string
     */
    public function getId()
    {
        return $this->id;
    }

    /**
     * get user's nickname
     *
     * @return string
     */
    public function getNickname()
    {
        return trim($this->data['nickname']);
    }

    /**
     * get user's data
     *
     * @return array
     */
    public function getData()
    {
        return $this->data;
    }

    /**
     * get user's groups
     *
     * @return array
     */
    public function getGroups()
    {
        return $this->group;
    }

    /**
     * Check group membership
     *
     * Checks if user is in specified group. If group name is an array,
     * user must be on one or more groups
     *
     * @param string|array $name group name to validate
     * @param bool $id whether $name is the group's id
     * @return bool true in case user is member of given group
     */
    public function isInGroup($name, $id = false)
    {
        if (empty($this->id)) {
            return false;
        }

        // in case there is no group name given, a loaded user is sufficiant
        if (empty($name)) {
            return true;
        }

        if (!is_array($name)) {
            $name   =   array($name);
        }

        $groups =   $this->getGroups();
        if ($id) {
            foreach ($name as $n) {
                if (isset($groups[$n])) {
                    return true;
                }
            }
            return false;
        }

        foreach ($name as $n) {
            if (in_array($n, $groups)) {
                return true;
            }
        }
        return false;
    }


    /**
     * Is User Enabled?
     *
     * Check enabled bit
     * 
     * @return bool true if enabled
     */
    public function isEnabled()
    {
        if (1 == intval($this->data['enabled'])) {
            return true;
        }

        return false;
    }

   /**
    * load user's data by id
    *
    * Call storage module to load user's data
    *
    * @param string $id user's id
    * @return true on success, false otherwise
    */
    public function load($id)
    {
        if ($this->id == $id && !empty($this->data)) {
            return true;
        }

        $this->id       =   null;
        $this->data     =   array();
        $this->group    =   array();

        $storage        =   $this->getStorageModule();
        if (!$storage->load($id)) {
            return false;
        }

        $this->id       =   $storage->getId();
        $this->data     =   $storage->get();
        $this->group    =   $storage->getGroup();
        return true;
    }

    /**
     * Reaload User Data
     *
     */
    public function reload()
    {
        $this->data =   array();
        $this->load($this->id);
    }

    /**
     * enable or disable user
     *
     * @param bool $enable
     */
    private function doEnable($enable)
    {
        // load user first
        if (!$this->id) {
            return;
        }

        if (intval($this->data['enabled']) == intval($enable)) {
            return;
        }
        $data   =   array('enabled' => 0);
        $event  =   'user:disabled';
        $msg    =   'Disabled user account {NICKNAME}';
        if ($enable) {
            $data['enabled']    =   1;
            $event              =   'user:enabled';
            $msg                =   'Enabled user account {NICKNAME}';
        }
        if (!$this->storage->set($data)) {
            return;
        }
        $data       =   $this->storage->get();
        $data['id'] =   $this->id;
        WBEvent::trigger($event, $msg, $data);
        return;
    }

    /**
     * enable user
     *
     * Set enabled flag to loaded user.
     */
    public function enable()
    {
        return $this->doEnable(true);
    }

    /**
     * disable user
     *
     * Remove enabled flag from loaded user.
     */
    public function disable()
    {
        return $this->doEnable(false);
    }

    /**
     * save user information
     *
     * Load user by id first!
     *
     * @param array $data
     */
    public function set($data)
    {
        // load user first
        if (!$this->id) {
            return;
        }

        $data       =   $this->getEditableData($data);

        /** @var WBUser_Storage */
        $storage    =   $this->getStorageModule();
        $storage->set($data);

        // trigger event
        $this->data =   $this->storage->get();
        $data       =   $this->data;
        $data['id'] =   $this->id;
        WBEvent::trigger('user:set', 'User data saved for {EMAIL} ({ID})', $data);
    }

    /**
     * Get date with editable fields
     *
     * Filter everything besides editable fields and
     * return savealble data
     *
     * @see $config
     * @param array $data
     * @return array
     */
    protected function getEditableData($data)
    {
        $this->loadConfig();
        $save   =   array();
        foreach ($this->config['fields']['editable'] as $f) {
            if (isset($data[$f])) {
                $save[$f]   =   $data[$f];
            }
        }
        return $save;
    }

    /**
     * save group memebership
     *
     * Load user by id first!
     *
     * @param array $groupIds
     */
    public function setGroups($groupIds)
    {
        // load user first
        if (!$this->id) {
            return;
        }

        $this->storage->setGroups($groupIds);

        // trigger event
        $data           =   $this->storage->get();
        $data['id']     =   $this->id;
        $data['groups'] =   $groupIds;
        WBEvent::trigger('user:setgroups', 'User\'s ({ID}) groups set.', $data);
    }

    /**
     * start storage module only once
     *
     * @return WBUser_Storage
     */
    public function getStorageModule()
    {
        if ($this->storage) {
            return $this->storage;
        }

        $storage        =   WBParam::get('wb/user/storage', 'Table');
        $this->storage  =   WBClass::create('WBUser_Storage_' . $storage);
        return $this->storage;
    }


    /**
     * Get list of required fields
     *
     * @return array
     */
    public function getFieldsRequired()
    {
        $this->loadConfig();
        return $this->config['fields']['required'];
    }

    /**
     * Get list of editable fields
     *
     * @return array
     */
    public function getFieldsEditable()
    {
        $this->loadConfig();
        return $this->config['fields']['editable'];
    }
}