<?php

/* ========================================================================
 *
 * @license This source file is subject to version 3.01 of the PHP license,
 *              that is available at http://www.php.net/license/3_01.txt
 *              If you did not receive a copy of the PHP license and are unable 
 *              to obtain it through the world-wide-web, please send a note to 
 *              license@php.net so we can mail you a copy immediately.  
 *
 * @category   Application of MyNETS
 * @project    OpenPNE UsagiProject 2006-2007
 * @package    MyNETS
 * @author     UsagiProject <info@usagi.mynets.jp>
 * @copyright  2006-2007 UsagiProject <author member ad http://usagi.mynets.jp/member.html>
 * @version    MyNETS,v 1.0.0
 * @since      File available since Release 1.0.0 Nighty
 * @chengelog  [2007/02/17] Ver1.1.0Nighty package
 * ======================================================================== 
 */

/**
 * OpenPNE
 * @copyright 2005-2006 OpenPNE Project
 * @link      http://www.tejimaya.com/openpne.shtml
 *
 */

/**
 * ユーザーリスト取得
 */
function db_admin_c_member_list($page, $page_size, &$pager)
{
    $sql = 'SELECT c_member_id FROM ' . MYNETS_PREFIX_NAME . 'c_member ORDER BY c_member_id';
    $ids = db_get_col_page($sql, $page, $page_size);

    $c_member_list = array();
    foreach ($ids as $id) {
        $c_member_list[] = db_common_c_member4c_member_id($id, true, true, 'private');
    }

    $sql = 'SELECT COUNT(*) FROM ' . MYNETS_PREFIX_NAME . 'c_member';
    $total_num = db_get_one($sql);
    $pager = admin_make_pager($page, $page_size, $total_num);

    return $c_member_list;
}

function db_admin_c_member4mail_address($mail_address)
{
    $sql = 'SELECT c_member_id FROM ' . MYNETS_PREFIX_NAME . 'c_member_secure' .
            ' WHERE pc_address = ? OR ktai_address = ? OR regist_address = ?';
    $enc_address = t_encrypt($mail_address);
    $params = array($enc_address, $enc_address, $enc_address);
    $list = db_get_col($sql, $params);

    $c_member_list = array();
    foreach ($list as $c_member_id) {
        $c_member_list[] = db_common_c_member4c_member_id($c_member_id, true, true, 'private');
    }
    return $c_member_list;
}

function db_admin_c_siteadmin($target)
{
    $sql = 'SELECT * FROM ' . MYNETS_PREFIX_NAME . 'c_siteadmin WHERE target = ?';
    $params = array($target);
    return db_get_row($sql, $params);
}

function db_admin_insert_c_siteadmin($target, $body)
{
    $data = array(
        'target' => $target,
        'body' => $body,
        'r_date' => db_now(),
    );
    return db_insert(MYNETS_PREFIX_NAME . 'c_siteadmin', $data);
}

function db_admin_update_c_siteadmin($target, $body)
{
    $data = array(
        'body' => $body,
        'r_date' => db_now(),
    );
    $where = array('target' => $target);
    return db_update(MYNETS_PREFIX_NAME . 'c_siteadmin', $data, $where);
}

function db_admin_update_c_sns_config($data)
{
    $where = array('c_sns_config_id' => 1);
    return db_update(MYNETS_PREFIX_NAME . 'c_sns_config', $data, $where);
}

function db_admin_delete_c_profile_option($c_profile_option_id)
{
    if (!$c_profile_option_id) return false;

    $sql = 'DELETE FROM ' . MYNETS_PREFIX_NAME . 'c_member_profile WHERE c_profile_option_id = ?';
    $params = array(intval($c_profile_option_id));
    db_query($sql, $params);

    $sql = 'DELETE FROM ' . MYNETS_PREFIX_NAME . 'c_profile_option WHERE c_profile_option_id = ?';
    db_query($sql, $params);

    return true;
}

function db_admin_insert_c_profile_option($c_profile_id, $value, $sort_order)
{
    $data = array(
        'c_profile_id' => intval($c_profile_id),
        'value' => $value,
        'sort_order' => intval($sort_order),
    );
    return db_insert(MYNETS_PREFIX_NAME . 'c_profile_option', $data);
}

function db_admin_update_c_profile_option($c_profile_option_id, $value, $sort_order)
{
    $data = array('value' => $value);
    $where = array('c_profile_option_id' => intval($c_profile_option_id));
    db_update(MYNETS_PREFIX_NAME . 'c_member_profile', $data, $where);

    $data = array(
        'value' => $value,
        'sort_order' => intval($sort_order),
    );
    db_update(MYNETS_PREFIX_NAME . 'c_profile_option', $data, $where);
}

function db_admin_insert_c_banner($a_href, $type, $nickname)
{
    $data = array(
        'a_href' => $a_href,
        'type' => $type,
        'nickname' => $nickname,
        'is_hidden_after' => 0,
        'is_hidden_before' => 0,
    );
    return db_insert(MYNETS_PREFIX_NAME . 'c_banner', $data);
}

function db_admin_update_c_banner($c_banner_id, $sets)
{
    $where = array('c_banner_id' => intval($c_banner_id));
    db_update(MYNETS_PREFIX_NAME . 'c_banner', $sets, $where);
}

function db_admin_delete_c_banner($c_banner_id)
{
    db_admin_delete_c_image4c_banner_id($c_banner_id);

    $sql = 'DELETE FROM ' . MYNETS_PREFIX_NAME . 'c_banner WHERE c_banner_id = ?';
    $params = array(intval($c_banner_id));
    db_query($sql, $params);
}

function db_admin_delete_c_image4c_banner_id($c_banner_id)
{
    $sql = 'SELECT image_filename FROM ' . MYNETS_PREFIX_NAME . 'c_banner WHERE c_banner_id = ?';
    $params = array(intval($c_banner_id));
    $image_filename = db_get_one($sql, $params);
    image_data_delete($image_filename);
}

function db_admin_insert_c_profile(
    $name
    , $caption
    , $is_required
    , $public_flag_edit
    , $public_flag_default
    , $form_type
    , $sort_order
    , $disp_regist
    , $disp_config
    , $disp_search
    , $val_type
    , $val_regexp
    , $val_min
    , $val_max
    )
{
    $data = array(
        'name' => $name,
        'caption' => $caption,
        'is_required' => (bool)$is_required,
        'public_flag_edit' => (bool)$public_flag_edit,
        'public_flag_default' => $public_flag_default,
        'form_type' => $form_type,
        'sort_order' => (int)$sort_order,
        'disp_regist' => (bool)$disp_regist,
        'disp_config' => (bool)$disp_config,
        'disp_search' => (bool)$disp_search,
        'val_type' => $val_type,
        'val_regexp' => $val_regexp,
        'val_min' => (int)$val_min,
        'val_max' => (int)$val_max,
    );
    return db_insert(MYNETS_PREFIX_NAME . 'c_profile', $data);
}

function db_admin_update_c_profile($c_profile_id
    , $name
    , $caption
    , $is_required
    , $public_flag_edit
    , $public_flag_default
    , $form_type
    , $sort_order
    , $disp_regist
    , $disp_config
    , $disp_search
    , $val_type
    , $val_regexp
    , $val_min
    , $val_max
    )
{
    $data = array(
        'name' => $name,
        'caption' => $caption,
        'is_required' => (bool)$is_required,
        'public_flag_edit' => (bool)$public_flag_edit,
        'public_flag_default' => $public_flag_default,
        'form_type' => $form_type,
        'sort_order' => intval($sort_order),
        'disp_regist' => (bool)$disp_regist,
        'disp_config' => (bool)$disp_config,
        'disp_search' => (bool)$disp_search,
        'val_type' => $val_type,
        'val_regexp' => $val_regexp,
        'val_min' => intval($val_min),
        'val_max' => intval($val_max),
    );
    $where = array('c_profile_id' => intval($c_profile_id));
    db_update(MYNETS_PREFIX_NAME . 'c_profile', $data, $where);

    // 公開設定が固定のときはユーザーの設定値を上書き
    if (!$public_flag_edit) {
        $data = array('public_flag' => $public_flag_default);
        db_update(MYNETS_PREFIX_NAME . 'c_member_profile', $data, $where);
    }
}

function db_admin_delete_c_profile($c_profile_id)
{
    $params = array(intval($c_profile_id));

    // メンバーのプロフィールから削除
    $sql = 'DELETE FROM ' . MYNETS_PREFIX_NAME . 'c_member_profile WHERE c_profile_id = ?';
    db_query($sql, $params);

    // 選択肢項目を削除
    $sql = 'DELETE FROM ' . MYNETS_PREFIX_NAME . 'c_profile_option WHERE c_profile_id = ?';
    db_query($sql, $params);

    // プロフィール項目を削除
    $sql = 'DELETE FROM ' . MYNETS_PREFIX_NAME . 'c_profile WHERE c_profile_id = ?';
    db_query($sql, $params);
}

function db_admin_c_profile4c_profile_id($c_profile_id)
{
    $sql = 'SELECT * FROM ' . MYNETS_PREFIX_NAME . 'c_profile WHERE c_profile_id = ?';
    $params = array(intval($c_profile_id));
    return db_get_row($sql, $params);
}

/**
 * 全バナー取得
 * 
 * @param  int $limit 取得最大件数
 * @return array_of_array  c_banner_list バナー配列
 */
function db_admin_c_banner_list4null($type = '')
{
    $sql = 'SELECT * FROM ' . MYNETS_PREFIX_NAME . 'c_banner';
    $params = array();
    if ($type) {
        $sql .= ' WHERE type = ?';
        $params[] = $type;
    }
    return db_get_all($sql, $params);
}

function db_admin_c_commu_category_parent_list()
{
    $sql = 'SELECT * FROM ' . MYNETS_PREFIX_NAME . 'c_commu_category_parent ORDER BY sort_order';
    return db_get_all($sql);
}

function db_admin_c_commu_category_list()
{
    $sql = 'SELECT * FROM ' . MYNETS_PREFIX_NAME . 'c_commu_category ORDER BY sort_order';
    $list = db_get_all($sql);

    $category_list = array();
    foreach ($list as $item) {
        $category_list[$item['c_commu_category_parent_id']][] = $item;
    }
    return $category_list;
}

function db_admin_insert_c_commu_category_parent($name, $sort_order)
{
    $data = array(
        'name' => $name,
        'sort_order' => intval($sort_order),
    );
    return db_insert(MYNETS_PREFIX_NAME . 'c_commu_category_parent', $data);
}

function db_admin_update_c_commu_category_parent($c_commu_category_parent_id, $name, $sort_order)
{
    $data = array(
        'name' => $name,
        'sort_order' => intval($sort_order),
    );
    $where = array(
        'c_commu_category_parent_id' => intval($c_commu_category_parent_id)
    );
    db_update(MYNETS_PREFIX_NAME . 'c_commu_category_parent', $data, $where);
}

function db_admin_delete_c_commu_category_parent($c_commu_category_parent_id)
{
    $params = array(intval($c_commu_category_parent_id));

    // 小カテゴリを削除
    $sql = 'DELETE FROM ' . MYNETS_PREFIX_NAME . 'c_commu_category WHERE c_commu_category_parent_id = ?';
    db_query($sql, $params);

    // 中カテゴリを削除
    $sql = 'DELETE FROM ' . MYNETS_PREFIX_NAME . 'c_commu_category_parent WHERE c_commu_category_parent_id = ?';
    db_query($sql, $params);
}

function db_admin_insert_c_commu_category($c_commu_category_parent_id, $name, $sort_order)
{
    $data = array(
        'c_commu_category_parent_id' => intval($c_commu_category_parent_id),
        'name' => $name,
        'sort_order' => intval($sort_order),
    );
    return db_insert(MYNETS_PREFIX_NAME . 'c_commu_category', $data);
}

function db_admin_update_c_commu_category($c_commu_category_id, $name, $sort_order)
{
    $data = array(
        'name' => $name,
        'sort_order' => intval($sort_order)
    );
    $where = array('c_commu_category_id' => intval($c_commu_category_id));
    db_update(MYNETS_PREFIX_NAME . 'c_commu_category', $data, $where);
}

function db_admin_delete_c_commu_category($c_commu_category_id)
{
    // 小カテゴリを削除
    $sql = 'DELETE FROM ' . MYNETS_PREFIX_NAME . 'c_commu_category WHERE c_commu_category_id = ?';
    $params = array(intval($c_commu_category_id));
    db_query($sql, $params);
}

function db_admin_c_admin_user_id4username($username)
{
    $sql = 'SELECT c_admin_user_id FROM ' . MYNETS_PREFIX_NAME . 'c_admin_user WHERE username = ?';
    $params = array($username);
    return db_get_one($sql, $params);
}

function db_admin_authenticate_password($uid, $password)
{
    $sql = 'SELECT c_admin_user_id FROM ' . MYNETS_PREFIX_NAME . 'c_admin_user WHERE c_admin_user_id = ? AND password = ?';
    $params = array(intval($uid), md5($password));
    return (bool)db_get_one($sql, $params);
}

function db_admin_update_c_admin_user_password($uid, $password)
{
    $data = array('password' => md5($password));
    $where = array('c_admin_user_id' => intval($uid));
    db_update(MYNETS_PREFIX_NAME . 'c_admin_user', $data, $where);
}

function db_admin_c_admin_config4name($name)
{
    $sql = 'SELECT value FROM ' . MYNETS_PREFIX_NAME . 'c_admin_config WHERE name = ?';
    $params = array($name);
    return db_get_one($sql, $params);
}

function db_admin_insert_c_admin_config($name, $value)
{
    $data = array(
        'name' => $name,
        'value' => $value,
    );
    return db_insert(MYNETS_PREFIX_NAME . 'c_admin_config', $data);
}

function db_admin_update_c_admin_config($name, $value)
{
    $data = array('value' => $value);
    $where = array('name' => $name);
    db_update(MYNETS_PREFIX_NAME . 'c_admin_config', $data, $where);
}

function db_admin_replace_c_admin_config($name, $value)
{
    $sql = 'DELETE FROM ' . MYNETS_PREFIX_NAME . 'c_admin_config WHERE name = ?';
    $params = array($name);
    db_query($sql, $params);

    $data = array(
        'name'  => strval($name),
        'value' => strval($value),
    );
    return db_insert(MYNETS_PREFIX_NAME . 'c_admin_config', $data);
}

function db_admin_c_admin_config_all()
{
    $sql = 'SELECT name, value FROM ' . MYNETS_PREFIX_NAME . 'c_admin_config';
    return db_get_assoc($sql);
}

function db_admin_delete_c_image_link4image_filename($image_filename)
{
    // c_banner (削除)
    $sql = 'DELETE FROM ' . MYNETS_PREFIX_NAME . 'c_banner WHERE image_filename = ?';
    $params = array($image_filename);
    db_query($sql, $params);

    // c_commu
    $tbl = 'c_commu';
    _db_admin_empty_image_filename($tbl, $image_filename);

    // c_commu_topic_comment
    $tbl = 'c_commu_topic_comment';
    _db_admin_empty_image_filename($tbl, $image_filename, 'image_filename1');
    _db_admin_empty_image_filename($tbl, $image_filename, 'image_filename2');
    _db_admin_empty_image_filename($tbl, $image_filename, 'image_filename3');

    // c_diary
    $tbl = 'c_diary';
    _db_admin_empty_image_filename($tbl, $image_filename, 'image_filename_1');
    _db_admin_empty_image_filename($tbl, $image_filename, 'image_filename_2');
    _db_admin_empty_image_filename($tbl, $image_filename, 'image_filename_3');

    // c_diary_comment
    $tbl = 'c_diary_comment';
    _db_admin_empty_image_filename($tbl, $image_filename, 'image_filename_1');
    _db_admin_empty_image_filename($tbl, $image_filename, 'image_filename_2');
    _db_admin_empty_image_filename($tbl, $image_filename, 'image_filename_3');

    // c_member
    $tbl = 'c_member';
    _db_admin_empty_image_filename($tbl, $image_filename);
    _db_admin_empty_image_filename($tbl, $image_filename, 'image_filename_1');
    _db_admin_empty_image_filename($tbl, $image_filename, 'image_filename_2');
    _db_admin_empty_image_filename($tbl, $image_filename, 'image_filename_3');
}

function _db_admin_empty_image_filename($tbl, $image_filename, $column = 'image_filename')
{
    $data = array(
        db_escapeIdentifier($column) => '',
    );
    $where = array(
        db_escapeIdentifier($column) => $image_filename,
    );
    db_update(MYNETS_PREFIX_NAME . db_escapeIdentifier($tbl), $data, $where);
}

function db_admin_c_profile_name_exists($name)
{
    $sql = 'SELECT c_profile_id FROM ' . MYNETS_PREFIX_NAME . 'c_profile WHERE name = ?';
    $params = array($name);
    return db_get_one($sql, $params);
}

function db_admin_update_is_login_rejected($c_member_id)
{
    $sql = 'SELECT is_login_rejected FROM ' . MYNETS_PREFIX_NAME . 'c_member WHERE c_member_id = ?';
    $params = array(intval($c_member_id));
    $is_login_rejected = db_get_one($sql, $params);
    if (is_null($is_login_rejected)) {
        return false;
    }

    $data = array('is_login_rejected' => !($is_login_rejected));
    $where = array('c_member_id' => intval($c_member_id));
    return db_update(MYNETS_PREFIX_NAME . 'c_member', $data, $where);
}

function db_admin_c_admin_user_list()
{
    $sql = 'SELECT * FROM ' . MYNETS_PREFIX_NAME . 'c_admin_user ORDER BY c_admin_user_id';
    return db_get_all($sql);
}

function db_admin_exists_c_admin_username($username)
{
    $sql = 'SELECT c_admin_user_id FROM ' . MYNETS_PREFIX_NAME . 'c_admin_user WHERE username = ?';
    $params = array(strval($username));
    return (bool)db_get_one($sql, $params);
}

function db_admin_insert_c_admin_user($username, $password, $auth_type)
{
    $data = array(
        'username' => strval($username),
        'password' => md5($password),
        'auth_type' => strval($auth_type),
    );
    return db_insert(MYNETS_PREFIX_NAME . 'c_admin_user', $data);
}

function db_admin_delete_c_admin_user($c_admin_user_id)
{
    $sql = 'DELETE FROM ' . MYNETS_PREFIX_NAME . 'c_admin_user WHERE c_admin_user_id = ?';
    $params = array(intval($c_admin_user_id));
    return db_query($sql, $params);
}

function db_admin_get_auth_type($c_admin_user_id)
{
    $sql = 'SELECT auth_type FROM ' . MYNETS_PREFIX_NAME . 'c_admin_user WHERE c_admin_user_id = ?';
    $params = array(intval($c_admin_user_id));
    return db_get_one($sql, $params);
}

/**
 * ユーザーIDリスト取得(絞り込み対応)
 */
function _db_admin_c_member_id_list($cond_list)
{
    $sql = 'SELECT c_member_id'.
           ' FROM ' . MYNETS_PREFIX_NAME . 'c_member'.
           ' WHERE 1';

    //開始年
    if (!empty($cond_list['s_year'])) {
        $sql .= ' AND birth_year >= ?';
        $params[] = $cond_list['s_year'];
    }
    //終了年
    if (!empty($cond_list['e_year'])) {
        $sql .= ' AND birth_year <= ?';
        $params[] = $cond_list['e_year'];
    }
    $sql .= ' ORDER BY c_member_id';

    $ids = db_get_col($sql, $params);

    //各プロフィールごとで絞り結果をマージする
    $_sql = 'SELECT name FROM ' . MYNETS_PREFIX_NAME . 'c_profile WHERE (form_type = ? OR form_type = ?)';
    $profile = db_get_col($_sql, array('select', 'radio'));

    if ( $profile ) {
        foreach ($profile as $value) {
            if (!empty($cond_list[$value])) {
                $sql = 'SELECT c_member_id FROM ' . MYNETS_PREFIX_NAME . 'c_member_profile WHERE c_profile_option_id = ?';
                $params = array($cond_list[$value]);
                $temp_ids = db_get_col($sql, $params);
                $ids = array_intersect($ids, $temp_ids);
            }
        }
    }

    return $ids;
}

/**
 * ユーザーリスト取得
 * 誕生年+プロフィール(select,radioのみ)
 */
function _db_admin_c_member_list($page, $page_size, &$pager, $cond_list)
{
    $ids = _db_admin_c_member_id_list($cond_list);
    $total_num = count($ids);
    $ids = array_slice($ids, ($page - 1) * $page_size, $page_size);

    $c_member_list = array();
    foreach ($ids as $id) {
        $c_member_list[] = db_common_c_member4c_member_id($id, true, true, 'private');
    }

    if ($total_num > 0) {
        $pager = admin_make_pager($page, $page_size, $total_num);
    }

    return $c_member_list;
}

function db_c_profile_option4c_profile_option_id($c_profile_option_id)
{
    $sql = "SELECT * FROM " . MYNETS_PREFIX_NAME . "c_profile_option WHERE c_profile_option_id = ? ";
    $params = array(intval($c_profile_option_id));
    return db_get_row($sql, $params);
}

/**
 * メンバー絞込みパラメータ取得
 */
function validate_cond($requests)
{
    $cond_list = array();
    //誕生年
    if (!empty($requests['s_year'])) {
        $cond_list['s_year'] = intval($requests['s_year']);
    }
    if (!empty($requests['e_year'])) {
        $cond_list['e_year'] = intval($requests['e_year']);
    }
    //プロフィール
    $profile_list = db_common_c_profile_list();

    foreach ($profile_list as $key => $value) {
        if (!empty($requests[$key])) {
            $cond_list[$key] = intval($requests[$key]);
        }
    }
    return $cond_list;
}

function do_admin_send_mail($c_member_id, $subject, $body)
{
    $c_member = db_common_c_member4c_member_id($c_member_id, true);

    if ($c_member['secure']['pc_address']) {
        $send_address = $c_member['secure']['pc_address'];
    } else {
        $send_address = $c_member['secure']['ktai_address'];
    }

    if (OPENPNE_MAIL_QUEUE) {
        //メールキューに蓄積
        put_mail_queue($send_address, $subject, $body);
    } else {
        t_send_email($send_address, $subject, $body);
    }
}

//メッセージ受信メール（メールキュー蓄積対応）
function do_admin_send_message($c_member_id_from, $c_member_id_to, $subject, $body)
{
    //メッセージ
    $c_message_id = _do_insert_c_message($c_member_id_from, $c_member_id_to, $subject, $body);

    do_admin_send_message_mail_send($c_member_id_to, $c_member_id_from);
    do_admin_send_message_mail_send_ktai($c_member_id_to, $c_member_id_from);

    return $c_message_id;
}

//メッセージ受信メール（メールキュー蓄積対応）
function do_admin_send_message_mail_send($c_member_id_to, $c_member_id_from)
{
    $c_member_to = db_common_c_member4c_member_id($c_member_id_to, true);
    $pc_address = $c_member_to['secure']['pc_address'];
    $is_receive_mail = $c_member_to['is_receive_mail'];

    $params = array(
        "c_member_to"   => db_common_c_member4c_member_id($c_member_id_to),
        "c_member_from" => db_common_c_member4c_member_id($c_member_id_from),
    );
    return admin_fetch_send_mail($pc_address, 'm_pc_message_zyushin', $params, $is_receive_mail);
}

//◆メッセージ受信メール(携帯)
function do_admin_send_message_mail_send_ktai($c_member_id_to, $c_member_id_from)
{
    $c_member_to = db_common_c_member4c_member_id($c_member_id_to, true);
    $ktai_address = $c_member_to['secure']['ktai_address'];
    $is_receive_ktai_mail = $c_member_to['is_receive_ktai_mail'];
    $p = array('kad' => t_encrypt($c_member_to['secure']['ktai_address']));
    $login_url = openpne_gen_url('ktai', 'page_o_login', $p);

    $params = array(
        'c_member_to'   => db_common_c_member4c_member_id($c_member_id_to),
        'c_member_from' => db_common_c_member4c_member_id($c_member_id_from),
        'login_url' => $login_url,
    );
    return admin_fetch_send_mail($ktai_address, 'm_ktai_message_zyushin', $params, $is_receive_ktai_mail);
}

function admin_fetch_send_mail($address, $tpl_name, $params = array(), $force = true, $from = '')
{
    $tpl_name .= '.tpl';
    if ($tpl = fetch_mail_m_tpl($tpl_name, $params)) {
        list($subject, $body) = $tpl;
        if ($from) {
            if (OPENPNE_MAIL_QUEUE) {
                //メールキューに蓄積
                put_mail_queue($address, $subject, $body, $force, $from);
            } else {
                t_send_email($address, $subject, $body, $force, $from);
            }
        } else {
            if (OPENPNE_MAIL_QUEUE) {
                //メールキューに蓄積
                put_mail_queue($address, $subject, $body, $force);
            } else {
                t_send_email($address, $subject, $body, $force);
            }
        }
        return true;
    } else {
        return false;
    }
}

?>
