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<?php
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// $Id: article.module,v 1.22 2006/06/25 16:11:36 msameer Exp $
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/**
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Article Module - an easy to use intergrated article management module.
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The article module allows for articles to be organized and displayed in
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a cenrtalized location. In essence it is a specialized taxonomy display
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module with some specific features that make it sutible for articles.
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@author Nicholas Young-Soares
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@package module_article
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@defgroup module_article an easy to use intergrated article management module.
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@{
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**/
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/**
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Hook Block - displays the latest articles list in a block.
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@param op the operation to be preformed. (default="list")
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@param delta the block to be displayed. (default=0)
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@return an array containin the block output.
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**/
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function article_block($op = 'list', $delta = 0, $edit = array()) {
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if ($op == 'list') {
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$blocks[0]['info'] = t('Latest Articles');
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return $blocks;
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}
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elseif ($op == 'view' && user_access('access content')) {
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$content = module_invoke('node', 'title_list', article_get_latest(variable_get('article_recent_block', '5')));
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if ($content) {
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$content .= theme('more_info', l(t('more'), 'article', array('title' => t('Read more articles.'))));
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}
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$blocks['subject'] = t(variable_get('article_block_title', t('Latest Articles')));
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$blocks['content'] = $content;
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return $blocks;
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}
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elseif ($op == 'configure' && $delta == 0) {
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$form['article_block_title'] = array(
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'#type' => 'textfield',
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'#title' => t('Block Title'),
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'#default_value' => variable_get('article_block_title', t('Latest Articles')),
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'#size' => 35,
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'#maxlength' => 255,
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'#description' => t('Title of the Articles block.')
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);
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$form['article_recent_block'] = array(
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'#type' => 'select',
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'#title' => t('Recent Articles to Display'),
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'#options' => drupal_map_assoc(array(5, 10, 15, 20)),
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'#default_value' => variable_get('article_recent_block', 5),
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'#description' => t('Sets the number of recent articles that will be displayed in the Recent Articles block.'),
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'#multiple' => false
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);
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return $form;
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}
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elseif ($op == 'save' && $delta == 0) {
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variable_set('article_recent_block', $edit['article_recent_block']);
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variable_set('article_block_title', $edit['article_block_title']);
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}
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}
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/**
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Hook Help - displays help and general information about the module.
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@param section specifies the section to display help for.
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@return a formated string containing the help output.
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**/
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function article_help($section) {
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global $base_url;
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$output = '';
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switch ($section) {
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case 'admin/help#article':
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case 'admin/modules#description':
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$output = t('Allow users to view nodes of multiple types in a central location.');
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break;
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}
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return $output;
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}
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/**
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Hook Link - returns links to the article module.
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@param type specifies the type of link to display. (page or admin)
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@param node
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@return an array of links.
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**/
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function article_link($type, $node = 0) {
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$links = array();
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if ($type == 'page' && user_access('access content')) {
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$links[] = l(t(variable_get('article_title', 'articles')), 'article', array('title' => t('Article listings.')));
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}
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return $links;
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}
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/**
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Hook Menu - sets up article entries in the main menu..
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@return an array of menu items.
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**/
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function article_menu($may_cache) {
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$items = array();
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$items[] = array('path' => 'article', 'title' => t('Article listings'), 'callback' => 'article_page', 'access' => user_access('access content'), 'type' => MENU_CALLBACK);
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return $items;
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}
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/**
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Hook Settings - admin settings for the article module.
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@return a formatted settings form.
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**/
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function article_settings() {
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$select = array();
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$vocabularies = module_invoke('taxonomy', 'get_vocabularies');
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if (is_array($vocabularies) && count($vocabularies) > 0) {
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foreach ($vocabularies as $vocabulary) {
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$select[$vocabulary->vid] = $vocabulary->name;
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}
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}
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$form['article_vocab'] = array(
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'#type' => 'select',
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'#title' => t('Article Vocabularies'),
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'#size' => min(9, count($select)),
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'#options' => $select,
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'#multiple' => TRUE,
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'#default_value' => variable_get('article_vocab', ''),
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'#description' => t('Select the vocabularies which contain the Article categories. All the vocabularies you select here will show up on the Article index.'),
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);
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$form['article_title'] = array(
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'#type' => 'textfield',
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'#title' => t('Overview Title'),
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'#default_value' => variable_get('article_title', t('Articles')),
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'#size' => 35,
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'#maxlength' => 255,
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'#description' => t('Title of the Articles box.')
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);
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$form['article_index_depth'] = array(
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'#type' => 'select',
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'#title' => t('Index Depth'),
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'#options' => array(0 => 'All Terms', 1 => 1, 2 => 2, 3 => 3, 4 => 4, 5 => 5, 6 => 6),
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'#default_value' => variable_get('article_index_depth', 0),
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'#description' => t('Defines how many levels of terms should be displayed on any given article index page. For example, if you select 1 then only one level of the Article index tree will be displayed at a time.'),
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'#multiple' => false
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);
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$form['recent_group'] = array('#type' => 'fieldset', '#title' => t('Recent Box Settings'));
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$form['recent_group']['article_recent_box_enable'] = array(
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'#type' => 'radios',
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'#title' => t('Recent Articles Box'),
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'#options' => array(t('Disabled'), t('Enabled')),
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'#default_value' => variable_get('article_recent_box_enable', 1),
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'#description' => t('Enables or Disables the recent articles box on the article index page.'),
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'#required' => false
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);
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$form['recent_group']['article_recent_box_title'] = array(
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'#type' => 'textfield',
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'#title' => 'Box Title',
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'#default_value' => variable_get('article_recent_box_title', t('Latest Articles')),
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'#size' => 35,
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'#maxlength' => 255,
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'#description' => t('Title of the Recent Articles Box on the Article index page.')
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);
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$form['recent_group']['article_recent_display'] = array(
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'#type' => 'select',
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'#options' => drupal_map_assoc(array(5, 10, 15)),
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'#default_value' => variable_get('article_recent_display', '5'),
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'#title' => t('Articles to Display'),
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'#description' => t('Sets the number of recent articles that will be displayed in the Recent Articles box. (0 = not displayed).'),
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'#multiple' => false
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);
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return $form;
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}
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/**
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Hook Page - displays the main article page.
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@return null.
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**/
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function article_page() {
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$body = '';
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if (arg(1) == 'feed') {
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module_invoke('node', 'feed', module_invoke('taxonomy', 'select_nodes', article_get_article_terms(), 'or', 0, FALSE));
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}
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else {
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if (arg(1) != NULL) {
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$breadcrumb = drupal_get_breadcrumb();
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$term = article_build_breadcrumbs($breadcrumb);
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drupal_set_breadcrumb($breadcrumb);
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if ($term != NULL) {
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$content = article_index($term->tid);
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if ($content != '') {
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$body = theme('box', $term->name . '- '. t('Sub Categories'), $content);
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}
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$terms = array_merge(array($term->tid), array_map('_article_get_tid_from_term', module_invoke('taxonomy', 'get_children', $term->tid)));
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print theme('page', $body . module_invoke('taxonomy', 'render_nodes', module_invoke('taxonomy', 'select_nodes', $terms)));
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}
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}
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else {
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$body = '';
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if (variable_get('article_recent_box_enable', 1)) {
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$body = theme('box', variable_get('article_recent_box_title', t('Latest Articles')), module_invoke('node', 'title_list', article_get_latest(variable_get('article_recent_display', '5'))) . theme('more_info', theme_feed_icon("article/feed")));
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}
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$content = article_index();
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if ($content != '') {
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print theme('page', $body . theme('box', t('Article Categories'), $content));
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}
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}
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}
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}
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/**
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Constructs a url from the current url arguments list.
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@return a string containing a formated URL.
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**/
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function article_get_current_url() {
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$arg_index = 1;
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$url = arg(0);
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while ($argument = arg($arg_index)) {
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$url .= '/'. urlencode($argument);
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$arg_index++;
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}
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return $url;
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}
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/**
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Constructs the article index page, using theme functions.
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@return a string containing the output ready for display.
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**/
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function article_index($tid = 0) {
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$output = '';
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$vocabularies = article_get_vocabularies();
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foreach ($vocabularies as $vocab) {
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$max_depth = variable_get('article_index_depth', 0);
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$vocab_tree = module_invoke('taxonomy', 'get_tree', $vocab->vid, $tid, -1, ($max_depth <= 0) ? NULL : $max_depth);
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$content = '';
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while (current($vocab_tree) != NULL) {
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$content .= article_build_index($vocab_tree, article_get_current_url());
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}
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if ($content != '') {
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$output .= theme('article_index', $vocab->name, $content);
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}
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}
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return $output;
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}
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/**
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Recursivly traverses the term tree to construct the index.
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@return string the output for this tree.
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**/
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function article_build_index(&$tree, $parent_url) {
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$output = '';
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if ($tree == array()) {
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return '';
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}
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do {
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$cur = current($tree);
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$nex = next($tree);
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if ($nex === false) {
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$next_depth = -1;
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}
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else {
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$next_depth = $nex->depth;
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}
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$cur->link = $parent_url . '/' . urlencode(trim($cur->name));
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$cur->children = '';
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if ($next_depth > $cur->depth) {
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$cur->children = article_build_index($tree, $cur->link);
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// sync $next_depth, because 'next item' may be shoved forward
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// Thanks for the patch Roderik.
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$nex = current($tree);
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if ($nex === false) {
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$next_depth = -1;
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}
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else {
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$next_depth = $nex->depth;
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}
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}
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$cur->count = module_invoke('taxonomy', 'term_count_nodes', ($cur->tid));
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$output .= theme('article_index_item', $cur);
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} while ($cur->depth == $next_depth);
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return theme('article_list', $output);
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}
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/**
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Gets all the vocabularies that are associated with the article module.
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@return array the vocabularies.
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**/
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function article_get_vocabularies() {
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$allvocabularies = module_invoke('taxonomy', 'get_vocabularies');
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$article_vocabs = variable_get('article_vocab', array());
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$vocabularies = array();
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foreach ($article_vocabs as $vocab) {
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$vocabularies[] = $allvocabularies[$vocab];
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}
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return $vocabularies;
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}
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/**
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Get all the terms associated with Articles.
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@return an array of unique term ids.
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**/
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function article_get_article_terms() {
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$vocabs = article_get_vocabularies();
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$tids = array();
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foreach ($vocabs as $vocab) {
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$tids = array_merge($tids, article_tax_get_terms($vocab->vid));
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}
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return array_unique($tids);
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}
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/**
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Get all the terms in a given vocabulary.
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@return an array of unique term ids.
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**/
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function article_tax_get_terms($vid) {
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$result = db_query('SELECT tid FROM {term_data} WHERE vid = %d', $vid);
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$tids = array();
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while ($term = db_fetch_array($result)) {
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$tids[] = $term['tid'];
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}
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return array_unique($tids);
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}
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/**
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Get the latest articles
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@return a database query result.
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**/
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function article_get_latest($count = 0) {
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$tids = article_get_article_terms();
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return article_select_nodes($tids, 'or', 0, FALSE, $count);
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}
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/**
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* Finds all nodes that match selected taxonomy conditions.
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* This is just a copy of taxonomy_select_nodes() but
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* includes node title field in the selection.
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* Is this useful or try to find a taxonomy function
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* to achieve this?
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*
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* @param $tids
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* An array of term IDs to match.
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* @param $operator
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* How to interpret multiple IDs in the array. Can be "or" or "and".
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* @param $depth
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* How many levels deep to traverse the taxonomy tree. Can be a nonnegative
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* integer or "all".
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* @param $pager
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* Whether the nodes are to be used with a pager (the case on most Drupal
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* pages) or not (in an XML feed, for example).
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* @return
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* A resource identifier pointing to the query results.
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*/
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function article_select_nodes($tids = array(), $operator = 'or', $depth = 0, $pager = TRUE, $count = 0) {
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if (count($tids) > 0) {
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// For each term ID, generate an array of descendant term IDs to the right depth.
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$descendant_tids = array();
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if ($depth === 'all') {
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$depth = NULL;
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}
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foreach ($tids as $index => $tid) {
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$term = module_invoke('taxonomy', 'get_term', $tid);
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$tree = module_invoke('taxonomy', 'get_tree', $term->vid, $tid, -1, $depth);
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$descendant_tids[] = array_merge(array($tid), array_map('_article_get_tid_from_term', $tree));
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}
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if ($operator == 'or') {
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$str_tids = implode(',', call_user_func_array('array_merge', $descendant_tids));
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$sql = 'SELECT DISTINCT n.nid, n.title, n.sticky, n.created FROM {node} n INNER JOIN {term_node} tn ON n.nid = tn.nid WHERE tn.tid IN ('. $str_tids .') AND n.status = 1 ORDER BY n.sticky DESC, n.created DESC';
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$sql_count = 'SELECT COUNT(n.nid) FROM {node} n INNER JOIN {term_node} tn ON n.nid = tn.nid WHERE tn.tid IN ('. $str_tids .') AND n.status = 1';
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}
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else {
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$joins = '';
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$wheres = '';
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foreach ($descendant_tids as $index => $tids) {
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$joins .= ' INNER JOIN {term_node} tn'. $index .' ON n.nid = tn'. $index .'.nid';
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$wheres .= ' AND tn'. $index .'.tid IN ('. implode(',', $tids) .')';
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}
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$sql = 'n.nid, n.title, n.sticky, n.created FROM {node} n '. $joins .' WHERE n.status = 1 AND '. $wheres .' ORDER BY n.sticky DESC, n.created DESC';
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$sql_count = 'SELECT COUNT(n.nid) FROM {node} n '. $joins .' WHERE n.status = 1 AND '. $wheres;
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}
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if ($pager && ($count > 0)) {
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$result = pager_query(db_rewrite_sql($sql), variable_get('default_nodes_main', 10) , 0, db_rewrite_sql($sql_count));
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}
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else {
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$count = ($count > 0) ? $count : 15;
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$result = db_query_range(db_rewrite_sql($sql), 0, $count);
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}
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}
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return $result;
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}
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/**
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| 440 |
Builds a breadcrumb list.
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| 441 |
|
| 442 |
@param breadcrumb a reference to the breadcrumb array. New items will be appending to this array.
|
| 443 |
|
| 444 |
@return returns a term object if the last item in the url is a term, otherwise returns NULL.
|
| 445 |
**/
|
| 446 |
function article_build_breadcrumbs(&$breadcrumb) {
|
| 447 |
if (arg(1) != NULL) {
|
| 448 |
$i = 1;
|
| 449 |
$url = 'article';
|
| 450 |
$breadcrumb[] = l(drupal_ucfirst(variable_get('article_title', t('Article'))), $url);
|
| 451 |
while (arg($i) != NULL) {
|
| 452 |
$last_term = urldecode(arg($i));
|
| 453 |
$url = $url . '/' . urlencode($last_term);
|
| 454 |
$breadcrumb[] = l(drupal_ucfirst($last_term), $url);
|
| 455 |
$i++;
|
| 456 |
}
|
| 457 |
|
| 458 |
$term = current(module_invoke('taxonomy', 'get_term_by_name', $last_term));
|
| 459 |
return $term;
|
| 460 |
}
|
| 461 |
return NULL;
|
| 462 |
}
|
| 463 |
|
| 464 |
/**
|
| 465 |
Helper function for array map purposes.
|
| 466 |
@param term the term object from which the tid will be extracted.
|
| 467 |
|
| 468 |
@return the tid member of $term.
|
| 469 |
**/
|
| 470 |
function _article_get_tid_from_term($term) {
|
| 471 |
return $term->tid;
|
| 472 |
}
|
| 473 |
/** @} End of the module_article group **/
|
| 474 |
|
| 475 |
|
| 476 |
/**
|
| 477 |
@addtogroup theme_system
|
| 478 |
|
| 479 |
Article module specific theme functions.
|
| 480 |
@{
|
| 481 |
**/
|
| 482 |
|
| 483 |
|
| 484 |
/**
|
| 485 |
Controls the output of the rendered index list.
|
| 486 |
|
| 487 |
@return string the output for the index list.
|
| 488 |
**/
|
| 489 |
function theme_article_index(&$name, &$index_list) {
|
| 490 |
if ($index_list != '') {
|
| 491 |
return "<div class=\"item-list\">\n$index_list\n</div>\n";
|
| 492 |
}
|
| 493 |
return '';
|
| 494 |
}
|
| 495 |
|
| 496 |
|
| 497 |
/**
|
| 498 |
Displays a single one level list. Called for each group of items at the same depth.
|
| 499 |
|
| 500 |
@return string the output for this list.
|
| 501 |
**/
|
| 502 |
function theme_article_list(&$output) {
|
| 503 |
if ($output != '') {
|
| 504 |
return "<ul>$output</ul>\n";
|
| 505 |
}
|
| 506 |
return '';
|
| 507 |
}
|
| 508 |
|
| 509 |
|
| 510 |
/**
|
| 511 |
Displays a single index item.
|
| 512 |
|
| 513 |
@return string the output for this item.
|
| 514 |
**/
|
| 515 |
function theme_article_index_item(&$term) {
|
| 516 |
$description = ($term->description != '') ? '<p class="article-desc">'. $term->description .'</p>' : '';
|
| 517 |
if ($term->count > 0) {
|
| 518 |
return '<li><div class="article-title">'. l($term->name ." ($term->count)", $term->link) .'</div>'. $description.$term->children .'</li>';
|
| 519 |
}
|
| 520 |
else {
|
| 521 |
return '<li><div class="article-title">'. $term->name ." ($term->count)</div>". $description.$term->children .'</li>';
|
| 522 |
}
|
| 523 |
}
|
| 524 |
|
| 525 |
|
| 526 |
/**
|
| 527 |
Displays more information content, suck as "more" links, and
|
| 528 |
feed images.
|
| 529 |
|
| 530 |
@return formatted string containint the output.
|
| 531 |
**/
|
| 532 |
function theme_more_info($content) {
|
| 533 |
return "<div class=\"more-link\">$content</div>";
|
| 534 |
}
|
| 535 |
|
| 536 |
/** @} End of addtogroup theme_system **/
|
| 537 |
|
| 538 |
?>
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