97 lines
2.7 KiB
PHP
97 lines
2.7 KiB
PHP
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<?php
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class ComicPressDBInterface {
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var $_non_comic_categories, $_all_categories;
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function ComicPressDBInterface() {}
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function get_instance() {
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static $instance;
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if (!isset($instance)) {
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$instance = new ComicPressDBInterface();
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}
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return $instance;
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}
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function set_comic_categories($categories) {
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$this->_non_comic_categories = array();
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$this->_all_categories = array();
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foreach (get_categories("hide_empty=0") as $category_object) {
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$this->_all_categories[] = $category_object->term_id;
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if (!in_array($category_object->term_id, $categories
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$this->categories_by_id[$category_object->term_id] = $category_object;
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}
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$this->_categories = $categories;
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}
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/**
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* Find the terminal post in a specific category.
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*/
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function get_terminal_post_in_category($category_id, $first = true) {
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$sort_order = $first ? "asc" : "desc";
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$terminal_comic_query = new WP_Query();
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$terminal_comic_query->query("showposts=1&order=${sort_order}&cat=${category_id}&status=publish");
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if ($terminal_comic_query->have_posts()) {
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return reset($terminal_comic_query->posts);
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}
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return false;
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}
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/**
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* Get the first comic in a category.
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*/
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function get_first_comic($category_id) {
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return $this->get_terminal_post_in_category($category_id);
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}
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/**
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* Get the last comic in a category.
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*/
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function get_last_comic($category_id) {
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return $this->get_terminal_post_in_category($category_id, false);
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}
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/**
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* Get the comic post adjacent to the current comic.
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*/
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function get_adjacent_comic($category, $next = false, $override_post = null) {
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global $wp_query, $post;
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$temp = $wp_query->is_single;
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$wp_query->is_single = true;
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if (!is_null($override_post)) {
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$temp_post = $post;
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$post = $override_post;
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}
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$categories_to_exclude = $this->get_leaves_of_tree($this->non_comic_categories);
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if (!is_null($category)) {
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$categories_to_exclude = $this->exclude_all_but_provided_categories($category);
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}
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$result = get_adjacent_post(false, implode(" and ", $categories_to_exclude), !$next);
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$wp_query->is_single = $temp;
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if (!is_null($override_post)) {
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$post = $temp_post;
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}
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return empty($result) ? false : $result;
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}
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/**
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* Get the previous comic from the current one.
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*/
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function get_previous_comic($category = null, $override_post = null) { return $this->get_adjacent_comic($category, false, $override_post); }
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/**
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* Get the next comic from the current one.
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*/
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function get_next_comic($category = null, $override_post = null) { return $this->get_adjacent_comic($category, true, $override_post); }
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}
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?>
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