128 lines
3.5 KiB
PHP
128 lines
3.5 KiB
PHP
<?php
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require_once('ComicPressDBInterface.inc');
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class ComicPressStoryline {
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var $_structure;
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/**
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* Create a searchable structure from a node list.
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* @param array $structure The structure to process.
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* @return boolean True if the structure was valid.
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*/
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function create_structure($structure) {
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$new_structure = array();
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$parent = null;
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$all_leaves = array();
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$adjacents_by_parent = array();
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if (is_array($structure)) {
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$is_valid = true;
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foreach ($structure as $branch) {
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if (is_string($branch)) {
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$parts = explode('/', $branch);
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$valid = false;
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if (count($parts) > 1) {
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if ($parts[0] == '0') { $valid = true; }
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}
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if (!$valid) {
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$is_valid = false; break;
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} else {
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$data = array();
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$leaf = end($parts);
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$all_leaves[] = $leaf;
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if (count($parts) > 2) {
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$parent = $parts[count($parts) - 2];
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if (!isset($adjacents_by_parent[$parent])) {
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$adjacents_by_parent[$parent] = array();
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}
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$adjacents_by_parent[$parent][] = $leaf;
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$data['parent'] = $parent;
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}
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$new_structure[$leaf] = $data;
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}
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} else {
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$is_valid = false; break;
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}
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}
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if ($is_valid) {
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foreach ($adjacents_by_parent as $parent => $adjacents) {
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for ($i = 0; $i < count($adjacents); ++$i) {
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foreach (array('previous' => -1, 'next' => 1) as $type => $dir) {
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if (isset($adjacents[$i + $dir])) {
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$new_structure[$adjacents[$i]][$type] = $adjacents[$i + $dir];
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}
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}
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}
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}
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for ($i = 0; $i < count($all_leaves); ++$i) {
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foreach (array('prior' => -1, 'upcoming' => 1) as $type => $dir) {
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if (isset($all_leaves[$i + $dir])) {
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$new_structure[$all_leaves[$i]][$type] = $all_leaves[$i + $dir];
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}
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}
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}
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$this->_structure = $new_structure;
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}
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}
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return is_array($this->_structure);
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}
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function _get_field($field, $id) {
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if (isset($this->_structure)) {
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if (isset($this->_structure[$id])) {
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if (isset($this->_structure[$id][$field])) {
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return $this->_structure[$id][$field];
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}
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}
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}
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return false;
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}
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function parent($id) { return $this->_get_field('parent', $id); }
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function previous($id) { return $this->_get_field('previous', $id); }
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function next($id) { return $this->_get_field('next', $id); }
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function upcoming($id) { return $this->_get_field('upcoming', $id); }
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function prior($id) { return $this->_get_field('prior', $id); }
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function valid($id) {
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if (isset($this->_structure[$id])) {
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return array_keys($this->_structure[$id]);
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}
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return false;
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}
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/**
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* Get the valid navigation directions for a particular post.
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*/
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function get_valid_nav($post_id) {
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if (($category = $this->get_valid_post_category($post_id)) !== false) {
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return $this->valid($category);
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}
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return false;
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}
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/**
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* Get the valid comic category for this post.
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*/
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function get_valid_post_category($post_id) {
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$result = false;
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foreach (wp_get_post_categories($post_id) as $category) {
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if ($this->valid($category)) {
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if ($result) { return false; }
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$result = $category;
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}
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}
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return $result;
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}
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}
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?>
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