<?php

class ComicPressMediaHandling {
	var $root_filter    = '%wordpress%/%type-folder%/';
	var $default_filter = '%wordpress%/%type-folder%/%date-Y-m-d%*.*';

	function _bundle_global_variables() {
		global $comic_folder, $archive_comic_folder, $rss_comic_folder, $mini_comic_folder;

		$bundle = array();
		foreach (array('comic', 'archive', 'rss', 'mini') as $which) {
			switch ($which) {
				case 'comic':
					$bundle['comic'] = $comic_folder;
					break;
				default:
					$bundle[$which] = ${"${which}_comic_folder"};
					break;
			}
		}
		return $bundle;
	}

	function _get_filter($filter_to_use = null) {
		global $comic_filename_filters;

		if (!is_null($filter_to_use)) {
			if (is_string($filter_to_use)) {
				if (isset($comic_filename_filters[$filter_to_use])) {
					return $this->_convert_to_percent_filter($comic_filename_filters[$filter_to_use]);
				}
			}
		}

		return $this->default_filter;
	}

	function _convert_to_percent_filter($old) {
		if (strpos(strtolower($old), '%wordpress%') !== 0) {
			$old = str_replace('{date}', '%date-Y-m-d%', $old);
			return $this->root_filter . $old;
		}
		return $old;
	}

	function _expand_filter($filter, $type_filter, $override_post = null) {
		global $post;
		$this->post_to_use = !is_null($override_post) ? $override_post : $post;
		$this->type_filter = $type_filter;

		$result = preg_replace_callback('#%([a-z0-9-]+)%#i', array(&$this, '_expand_filter_callback'), $filter);
		$result = str_replace('.', '\.', $result);
		$result = str_replace('*', '.*', $result);

		unset($this->post_to_use);
		unset($this->type_filter);

		return $result;
	}

	function _abspath() { return ABSPATH; }

	function _expand_filter_callback($matches) {
		$value = '';
		switch (strtolower($matches[1])) {
			case 'wordpress':
				$value = $this->_abspath();
				break;
			case 'type-folder':
				$value = $this->type_filter;
				break;
			default:
				if (preg_match('#^date-(.*)$#', $matches[1], $date_matches) > 0) {
					$value = date($date_matches[1], strtotime($this->post_to_use->post_date));
					break;
				}
				$value = $matches[0];
				break;
		}
		return $value;
	}

	function get_comic_path($type = 'comic', $override_post = null, $filter = 'default', $multi = false) {
		$filter = $this->get_filter($filter);
	}
}