<?php
/*
Plugin Name: Article Directory
Plugin URI: http://articlesss.com/article-directory-wordpress-plugin/
Description: Displays the structured list of categories (like in article directory), which can be easily customized with CSS. See an example at http://articlesss.com/.
Version: 0.5
Author: Dimox
Author URI: http://dimox.name/
*/


function article_directory(
  $parameters = array()
	) {

/* ================================ OPTIONS ================================= */

	$exclude_cat = array(); 		// in parentheses comma separated ID of categories, which should be excluded
	$show_parent_count = 1;     // show the number of articles in parent categories: 1 - yes, 0 - no
	$show_child_count = 1;      // show the number of articles in child categories: 1 - yes, 0 - no
	$hide_empty = 0;            // hide empty categories: 1 - yes, 0 - no
	$desc_for_parent_title = 1; // show description in the title of parent categories link: 1 - yes, 0 - no
	$desc_for_child_title = 1;  // show description in the title of child categories link: 1 - yes, 0 - no
	$child_hierarchical = 1;    // use hierarchy in subcategories: 1 - yes, 0 - no
	$column_count = 3;          // number of columns for categories list
	$sort_direction = 0;        // sort direction: 1 - from top to down, 0 - from left to right
	$no_child_alert = 1;        // show the message "No categories", if category don't contain subcategories: 1 - yes, 0 - no
	$show_child = 1;            // show subcategories: 1 - yes, 0 - no

/* ============================== END OF OPTIONS ============================== */

  foreach ($parameters as $key => $value) $$key = $value;


global $wpdb;
$cal_tree = array();
if (!$column_count) $column_count = 1;

function get_wp_version() {

	global $wp_version;

	preg_match("/\d\.\d/i", $wp_version, $match);

	// wpmu - increment version by 1.0 to match wp
	if (strpos($wp_version, 'wordpress-mu') !== false) {
		$match[0] = $match[0] + 1.0;
	}
	return $match[0];
}



	if (get_wp_version() == '2.1' || get_wp_version() == '2.2') {

		  error_reporting(0);
			$wpdb->show_errors = false;

		}


	global $rssfeeds;
  $feed = '';
	if ($rssfeeds) {
			$feed = 'RSS';
			$show_parent_count = 0;
			$show_child_count = 0;
	}


	if (get_wp_version() < '2.3') {

		 // for WP < 2.3
			$parent_cats = $wpdb->get_results("SELECT *
			FROM $wpdb->categories
			WHERE category_parent = 0 " .
			( count($exclude_cat) ? ' AND cat_ID NOT IN (' . implode(',', $exclude_cat) . ') ' : '' )
			. " ORDER BY cat_name");

			foreach ($parent_cats as $parent) {

				$summ = "SELECT SUM(category_count) FROM $wpdb->categories WHERE category_parent = $parent->cat_ID";
				$child_summ = mysql_result(mysql_query($summ),0);

				$cat_name = get_the_category_by_ID($parent->cat_ID);

    		$descr = sprintf(__("View all posts filed under %s"), $cat_name);

				if ($desc_for_parent_title == 1) {
			        if (empty($parent->category_description)) {
			        	$descr = sprintf(__("View all posts filed under %s"), $cat_name);
							} else {
			        	$descr = $parent->category_description;
							}
						}

        $child_summ += $parent->category_count;

				if ($show_parent_count == 1) {
							$parent_count = ' (' . $child_summ . ')';
						} else {
							$parent_count = '';
						}

				// перехват вывода
        ob_start();
        wp_list_cats( ( count($exclude_cat) ? 'exclude=' . implode(',', $exclude_cat) : '' ) . '&optioncount=' . $show_child_count . '&hide_empty=' . $hide_empty . '&use_desc_for_title=' . $desc_for_child_title . '&child_of=' . $parent->cat_ID . '&hierarchical=1&feed=' . $feed);
        $echo = ob_get_contents();
        ob_end_clean();

        $cal_tree[] = array(
          	'cat' => array(
          	'href'  => get_category_link($parent->cat_ID),
          	'title' => $descr,
          	'name'  => $cat_name,
          	'count' => $parent_count
        	),
        	'cats'=> $echo
        );

			}

		}  // end for WP < 2.3

		else {

      // for WP >= 2.3
			$parent_cats = $wpdb->get_results("SELECT *
			FROM $wpdb->term_taxonomy term_taxonomy
			LEFT JOIN $wpdb->terms terms
			ON terms.term_id = term_taxonomy.term_id
			WHERE term_taxonomy.taxonomy = 'category' AND term_taxonomy.parent = 0 " .
			( count($exclude_cat) ? ' AND terms.term_id NOT IN (' . implode(',', $exclude_cat) . ') ' : '' )
			. " ORDER BY terms.name");

			foreach ($parent_cats as $parent) {
				$summ = "SELECT SUM(count) FROM $wpdb->term_taxonomy WHERE taxonomy = 'category' AND parent = $parent->term_id";
				$child_summ = mysql_result(mysql_query($summ),0);

				$cat_name = get_the_category_by_ID($parent->term_id);

    		$descr = sprintf(__("View all posts filed under %s"), $cat_name);

				if ($desc_for_parent_title == 1) {
			        if (empty($parent->description)) {
			        	$descr = sprintf(__("View all posts filed under %s"), $cat_name);
							} else {
			          $descr = $parent->description;
			        }
						}

        $child_summ += $parent->count;

				if ($show_parent_count == 1) {
							$parent_count = ' (' . $child_summ . ')';
						} else {
							$parent_count = '';
						}

				$cal_tree[] = array(
						'cat' => array(
					  'href'  => get_category_link($parent->term_id),
					  'title' => $descr,
					  'name'  => $cat_name,
					  'count' => $parent_count
					),
				'cats'=> wp_list_categories( ( count($exclude_cat) ? 'exclude=' . implode(',', $exclude_cat) : '' ) . '&show_count=' . $show_child_count . '&hide_empty=' . $hide_empty . '&use_desc_for_title=' . $desc_for_child_title . '&child_of=' . $parent->term_id . '&title_li=&hierarchical=' . $child_hierarchical . '&echo=0&feed=' . $feed)
				);

			}

		} // end for WP >= 2.3



    $_tree = array();
    $count = count($cal_tree);
    if ($sort_direction) {
        $line_count = ceil( $count / $column_count );
        $limit      = $count - $line_count * $column_count % $count;
        for ($i = 0; $i < $count; $i++) {
            $index = floor($i / $line_count) + ($limit && $i > $limit ? 1 : 0);
            if (!isset($_tree[$index])) { $_tree[$index] = array(); }
            $_tree[$index][] = &$cal_tree[$i];
        }
    }
    else {
        for ($i = 0; $i < $count; $i++) {
            $index = $i % $column_count;
            if (!isset($_tree[$index])) { $_tree[$index] = array(); }
            $_tree[$index][] = &$cal_tree[$i];
        }
    }


    if (count($_tree)) {

			echo '
<div id="categories">';

      for ($j = 0, $count = count($_tree); $j < $count; $j++) {

        // вывод столбца
      	$write = '
  <ul class="column">
               ';

        // вывод рубрик для столбца
        for ($i = 0, $icount = count($_tree[$j]); $i < $icount; $i++) {

					if ($rssfeeds) {

        	$write .= '

		<li><div><a href="' . $_tree[$j][$i]['cat']['href'] . '" title="' . $_tree[$j][$i]['cat']['title'] . '">' . $_tree[$j][$i]['cat']['name'] . '</a> (<a href="' . $_tree[$j][$i]['cat']['href'] . '/feed/" title="' . $_tree[$j][$i]['cat']['title'] . '">RSS</a>)</div>';

          } else {

        	$write .= '

		<li><div><a href="' . $_tree[$j][$i]['cat']['href'] . '" title="' . $_tree[$j][$i]['cat']['title'] . '">' . $_tree[$j][$i]['cat']['name'] . '</a>' . $_tree[$j][$i]['cat']['count'] . '</div>';

					}

      // see wp-includes/category-template.php::276
      // $output .= '<li>' . __("No categories") . '</li>';
      $nocats = '<li>' . __("No categories") . '</li>';

			if ($no_child_alert == 1) $nocats = '';

			if ($_tree[$j][$i]['cats'] != $nocats && $show_child == 1) {

					$write .= '
    	<ul class="sub-categories">';
    			$write .= $_tree[$j][$i]['cats'];
    			$write .= '
    	</ul>';

					}
    			$write .= '
    </li>';

				}

				// печать одного столбца
    	  echo $write . '
  </ul>';

			}

	echo '
</div>';

		}

}

?>