/*
    Plugin Name: WP Development Utilities
    Plugin URI: http://www.fabiocicerchia.it/projects/wp-development-utilities/
    Description: Extends the template tags with more functions that are very useful.
    Author: Fabio Cicerchia
    Version: 1.5
    License: GPL
    Author URI: http://www.fabiocicerchia.it
*/
 
if (!class_exists('WP_Dev_Utilities')) {
/**
 * Extends the template tags with more functions that are very useful.
 * @package wp_development_utilities
 * @author Fabio Cicerchia
 * @license http://opensource.org/licenses/gpl-license.php GNU Public License
 * @version 1.5
 */
class WP_Dev_Utilities {
 
    /**
     * Is really execute in  wordpress
     * @var bool
     * @access public
     */
    var $_is_wordpress;
 
    /**
     * Contains the informations of logged user
     * @var object
     * @access private
     */
    var $_userdata;
 
    /**
     * What is the current version of this script
     * @var string
     * @access public
     */
    var $version;
 
    /**
     * PHP4 Constructor
     * @access public
     */
    function WP_Dev_Utilities() {
        $this->__construct();
    }
 
    /**
     * PHP5 Constructor
     * @access public
     */
    function __construct() {
        $this->_is_wordpress = (defined('WPINC') && defined('ABSPATH')) ? true : false;
 
        if ($this->_is_wordpress) {
            require_once(ABSPATH . WPINC . '/pluggable.php');
 
            $this->version = $this->_get_version();
            $this->_retrieve_user_data();
        } else {
            die("ERROR: You don't use this class out of wordpress!");
        }
    }
 
    /**
     * A function to print variable only if the user logged as administrator
     * @access public
     */
    function _debug() {
        if ($this->is_administrator()) {
            $args = func_get_args();
            $numargs = count($args);
 
            $exit = isset($num_args[$numargs - 2]) ? $num_args[$numargs - 2] : true;
            $user_printf = isset($num_args[$numargs - 1]) ? $num_args[$numargs - 1] : false;
 
            for ($i = 0; $i < ($numargs - 2); $i++) {
                if ($use_printf) print_f($args[$i]);
                else var_dump($args[$i]);
            }
 
            if ($exit) exit;
        }
    }
 
    /**
     * Get the current plugin version
     * @access private
     * @return string
     */
    function _get_version() {
        $content = file_get_contents(__FILE__);
        $regex = '/ersion: (.*)\n/';
        preg_match($regex, $content, $matches);
 
        return $matches[1];
    }
 
    /**
     * Retrive user data informations only if user is logged in
     * @access private
     * @global object $userdata
     */
    function _retrieve_user_data() {
        global $userdata;
 
       $this->_userdata = (is_user_logged_in()) ? $userdata : null;
    }
 
    /**
     * Returns the number of pages of a post
     * @access public
     * @param int $id
     * @return int
     */
    function count_num_pages_post($id) {
        if (is_int($id)) {
            $content = $this->get_post_content_from_id($id);
 
            return count(split('<!--' . 'nextpage-->', $content));
        } else {
            return 0;
        }
    }
 
    /**
     * Get the current execution time
     * @access public
     * @param int $precision
     * @global float $timestart
     * @return float
     */
    function get_current_execution_time($precision = 3) {
        global $timestart;
 
        $mtime = explode(' ', microtime());
        $timeend = $mtime[1] + $mtime[0];
        $timetotal = $timeend-$timestart;
        if (function_exists('number_format_i18n')) {
            $r = number_format_i18n($timetotal, intval($precision));
        } else {
            $r = number_format($timetotal, intval($precision));
        }
 
        return $r;
    }
 
    /**
     * Returns the name of the user logged on
     * @access public
     * @return string
     */
    function get_logged_username() {
        return (is_user_logged_in()) ? $this->_userdata->user_login : false;
    }
 
    /**
     * Return the content of the post from his id
     * @access public
     * @param int $id
     * @global object $wpdb
     * @return string
     */
    function get_post_content_from_id($id) {
        global $wpdb;
 
        if (is_int($id)) {
            $query = "SELECT `post_content` FROM $wpdb->posts WHERE `ID`=$id LIMIT 1;";
            $res = $wpdb->get_results($query, ARRAY_A);
            return isset($res[0]['post_content']) ? $res[0]['post_content'] : '';
        } else {
            return '';
        }
    }
 
    /**
     * Return the contents of the post permalink
     * @access public
     * @param string $permalink
     * @return string
     */
    function get_post_content_from_permalink($permalink) {
        $id = $this->get_post_id_from_permalink($permalink);
 
        return $this->get_post_content_from_id($id);
    }
 
    /**
     * Return the id of the post permalink
     * @access public
     * @param string $permalink
     * @global object $wpdb
     * @return int
     */
    function get_post_id_from_permalink($permalink) {
        global $wpdb;
 
        $permalink_structure = get_option('permalink_structure');
        $regex = $permalink_structure;
 
        $rewritecode = array(
                '%year%'        => 'YEAR(`post_date`)=\'%s\'',
                '%monthnum%'    => 'MONTH(`post_date`)=\'%s\'',
                '%day%'         => 'DAYOFMONTH(`post_date`)=\'%s\'',
                '%hour%'        => 'HOUR(`post_date`)=\'%s\'',
                '%minute%'      => 'MINUTE(`post_date`)=\'%s\'',
                '%second%'      => 'SECOND(`post_date`)=\'%s\'',
                '%postname%'    => '`post_name`=\'%s\'',
                '%post_id%'     => '`ID`=\'%s\'',
                '%category%'    => '`ID` IN (%s)',
                '%author%'      => '`post_author`=\'%s\'',
                '%pagename%'    => 'post_name`=\'%s\'');
        $codes = array_keys($rewritecode);
 
        $token = array();
        $ordered_codes = explode('%', $permalink_structure);
        foreach($ordered_codes as $value) {
            if (in_array("%$value%", $codes)) {
                $token[] = "%$value%";
            }
        }
 
        foreach($codes as $value) {
            $regex = str_replace($value, '(.+)', $regex);
        }
 
        $regex = '/.*' . $_SERVER['HTTP_HOST'] . str_replace('/', '\/', $regex) . '$/';
        preg_match_all($regex, $permalink, $matches);
 
        for ($i = 1; $i < count($matches); $i++) {
            $values[$token[$i - 1]] = $matches[$i][0];
        }
 
        $where = array('');
        foreach($codes as $value) {
            if (!isset($values[$value])) continue;
 
            if ($value == '%category%') {
                $parent = 0;
                $posts = array();
                $values[$value] = explode('/', $values[$value]);
                foreach($values[$value] as $v) { //USE DISTINCT
                    $q2 = "SELECT p.ID as id, t.term_id as parent_ti FROM $wpdb->posts p, $wpdb->terms t, $wpdb->term_relationships tr, $wpdb->term_taxonomy tt WHERE tr.object_id=p.ID AND tt.term_taxonomy_id=tr.term_taxonomy_id AND t.term_id=tt.term_id AND t.slug='$v' AND p.post_status='publish' AND tt.parent=$parent;";
                    $res = $wpdb->get_results($q2, ARRAY_A);
                    $posts[] = $res;
 
                    $q2 = "SELECT t.term_id as parent_ti FROM $wpdb->terms t, $wpdb->term_taxonomy tt WHERE t.slug='$v' AND tt.term_id=t.term_id AND tt.parent=$parent LIMIT 1;";
                    $res = $wpdb->get_results($q2, ARRAY_A);
                    $parent = $res[0]['parent_ti'];
                }
 
                $ids = array();
                foreach($posts as $v) {
                    if (is_array($v)) {
                        foreach ($v as $post) {
                            $ids[] = $post['id'];
                        }
                    }
                }
                $values[$value] = implode(', ', $ids);
            } elseif ($value == '%author%') {
                $q2 = "SELECT `ID` FROM $wpdb->users WHERE `display_name`='" . $values['%author%'] . "'";
                $res = $wpdb->get_results($q2, ARRAY_A);
                $values[$value] = $res[0]['ID'];
            }
            $where[] = sprintf($rewritecode[$value], $values[$value]);
        }
 
        $query = "SELECT `ID` FROM $wpdb->posts WHERE `post_status`='publish'" . implode(' AND ', $where) . " LIMIT 1;";
        $res = $wpdb->get_results($query, ARRAY_A);
        return $res[0]['ID'];
    }
 
    /**
     * Check if logged user has the administrator privileges
     * @access public
     * @return bool
     */
    function is_administrator() {
        return (!is_null($this->_userdata)) ? $this->_userdata->wp_capabilities['administrator'] : false;
    }
 
    /**
     * Returns the user's browser name
     * @access public
     * @param bool $shortname
     * @param bool $uppercase
     * @global bool $is_safari
     * @global bool $is_NS4
     * @global bool $is_opera
     * @global bool $is_macIE
     * @global bool $is_winIE
     * @global bool $is_gecko
     * @global bool $is_lynx
     * @global bool $is_IE
     * @return string
     */
    function get_web_browser($shortname = false, $uppercase = false) {
        global $is_safari, $is_NS4, $is_opera, $is_macIE, $is_winIE, $is_gecko, $is_lynx, $is_IE;
 
        if ($is_macIE || $is_winIE || $is_IE) {
            $wb = ($shortname) ? 'ie' : 'internet explorer';
        } elseif ($is_safari) {
            $wb = 'safari';
        } elseif ($is_NS4) {
            $wb = ($shortname) ? 'ns' : 'netscape';
        } elseif ($is_gecko) {
            $wb = 'gecko';
        } elseif ($is_lynx) {
            $wb = 'lynx';
        } else {
            $wb = 'unknown';
        }
 
        return ($uppercase) ? strtoupper($wb) : $wb;
    }
 
    /**
     * Returns the web server is use
     * @access public
     * @param bool $uppercase
     * @global bool $is_apache
     * @global bool $is_IIS
     * @return string
     */
    function get_web_server($uppercase = false) {
        global $is_apache, $is_IIS;
 
        if ($is_apache) {
            $ws = 'apache';
        } elseif ($is_IIS) {
            $ws = 'iis';
        } else {
            $wb = 'unknown';
        }
 
        return ($uppercase) ? strtoupper($ws) : $ws;
    }
 
    /**
     * Get the current wordpress version
     * @access public
     * @global string $wp_version
     * @return string
     */
    function get_wp_version() {
        global $wp_version;
 
        return $wp_version;
    }
}
 
/**
 * Init the class plugin
 * @access public
 * @global object $wp_du
 * @global object $wp_dev_utilities
 */
function wp_dev_utilities_init() {
    global $wp_du;
    /**
     * @deprecated
     */
    global $wp_dev_utilities;
 
    $wp_du = new WP_Dev_Utilities();
    $wp_dev_utilities = $wp_du;
}
 
wp_dev_utilities_init();
}