658 lines
23 KiB
Plaintext
658 lines
23 KiB
Plaintext
<?php
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// $Id$
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/**
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* @file
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* Used to aggregate syndicated content (RSS, RDF, and Atom).
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*/
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/**
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* Implementation of hook_help().
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*/
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function aggregator_help($path, $arg) {
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switch ($path) {
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case 'admin/help#aggregator':
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$output = '<p>' . t('The aggregator is a powerful on-site syndicator and news reader that gathers fresh content from RSS-, RDF-, and Atom-based feeds made available across the web. Thousands of sites (particularly news sites and blogs) publish their latest headlines and posts in feeds, using a number of standardized XML-based formats. Formats supported by the aggregator include <a href="@rss">RSS</a>, <a href="@rdf">RDF</a>, and <a href="@atom">Atom</a>.', array('@rss' => 'http://cyber.law.harvard.edu/rss/', '@rdf' => 'http://www.w3.org/RDF/', '@atom' => 'http://www.atomenabled.org')) . '</p>';
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$output .= '<p>' . t('Feeds contain feed items, or individual posts published by the site providing the feed. Feeds may be grouped in categories, generally by topic. Users view feed items in the <a href="@aggregator">main aggregator display</a> or by <a href="@aggregator-sources">their source</a>. Administrators can <a href="@feededit">add, edit and delete feeds</a> and choose how often to check each feed for newly updated items. The most recent items in either a feed or category can be displayed as a block through the <a href="@admin-block">blocks administration page</a>. A <a href="@aggregator-opml">machine-readable OPML file</a> of all feeds is available. A correctly configured <a href="@cron">cron maintenance task</a> is required to update feeds automatically.', array('@aggregator' => url('aggregator'), '@aggregator-sources' => url('aggregator/sources'), '@feededit' => url('admin/content/aggregator'), '@admin-block' => url('admin/build/block'), '@aggregator-opml' => url('aggregator/opml'), '@cron' => url('admin/reports/status'))) . '</p>';
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$output .= '<p>' . t('For more information, see the online handbook entry for <a href="@aggregator">Aggregator module</a>.', array('@aggregator' => 'http://drupal.org/handbook/modules/aggregator/')) . '</p>';
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return $output;
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case 'admin/content/aggregator':
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$output = '<p>' . t('Thousands of sites (particularly news sites and blogs) publish their latest headlines and posts in feeds, using a number of standardized XML-based formats. Formats supported by the aggregator include <a href="@rss">RSS</a>, <a href="@rdf">RDF</a>, and <a href="@atom">Atom</a>.', array('@rss' => 'http://cyber.law.harvard.edu/rss/', '@rdf' => 'http://www.w3.org/RDF/', '@atom' => 'http://www.atomenabled.org')) . '</p>';
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$output .= '<p>' . t('Current feeds are listed below, and <a href="@addfeed">new feeds may be added</a>. For each feed or feed category, the <em>latest items</em> block may be enabled at the <a href="@block">blocks administration page</a>.', array('@addfeed' => url('admin/content/aggregator/add/feed'), '@block' => url('admin/build/block'))) . '</p>';
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return $output;
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case 'admin/content/aggregator/add/feed':
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return '<p>' . t('Add a feed in RSS, RDF or Atom format. A feed may only have one entry.') . '</p>';
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case 'admin/content/aggregator/add/category':
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return '<p>' . t('Categories allow feed items from different feeds to be grouped together. For example, several sport-related feeds may belong to a category named <em>Sports</em>. Feed items may be grouped automatically (by selecting a category when creating or editing a feed) or manually (via the <em>Categorize</em> page available from feed item listings). Each category provides its own feed page and block.') . '</p>';
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case 'admin/content/aggregator/add/opml':
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return '<p>' . t('<acronym title="Outline Processor Markup Language">OPML</acronym> is an XML format used to exchange multiple feeds between aggregators. A single OPML document may contain a collection of many feeds. Drupal can parse such a file and import all feeds at once, saving you the effort of adding them manually. You may either upload a local file from your computer or enter a URL where Drupal can download it.') . '</p>';
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}
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}
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/**
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* Implementation of hook_theme().
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*/
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function aggregator_theme() {
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return array(
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'aggregator_wrapper' => array(
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'arguments' => array('content' => NULL),
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'template' => 'aggregator-wrapper',
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),
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'aggregator_categorize_items' => array(
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'arguments' => array('form' => NULL),
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),
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'aggregator_feed_source' => array(
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'arguments' => array('feed' => NULL),
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'template' => 'aggregator-feed-source',
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),
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'aggregator_block_item' => array(
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'arguments' => array('item' => NULL, 'feed' => 0),
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),
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'aggregator_summary_items' => array(
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'arguments' => array('summary_items' => NULL, 'source' => NULL),
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'template' => 'aggregator-summary-items',
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),
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'aggregator_summary_item' => array(
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'arguments' => array('item' => NULL),
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'template' => 'aggregator-summary-item',
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),
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'aggregator_item' => array(
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'arguments' => array('item' => NULL),
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'template' => 'aggregator-item',
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),
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'aggregator_page_opml' => array(
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'arguments' => array('feeds' => NULL),
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),
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'aggregator_page_rss' => array(
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'arguments' => array('feeds' => NULL, 'category' => NULL),
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),
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);
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}
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/**
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* Implementation of hook_menu().
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*/
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function aggregator_menu() {
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$items['admin/content/aggregator'] = array(
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'title' => 'Feed aggregator',
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'description' => "Configure which content your site aggregates from other sites, how often it polls them, and how they're categorized.",
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'page callback' => 'aggregator_admin_overview',
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'access arguments' => array('administer news feeds'),
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);
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$items['admin/content/aggregator/add/feed'] = array(
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'title' => 'Add feed',
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'page callback' => 'drupal_get_form',
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'page arguments' => array('aggregator_form_feed'),
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'access arguments' => array('administer news feeds'),
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'type' => MENU_LOCAL_TASK,
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'parent' => 'admin/content/aggregator',
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);
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$items['admin/content/aggregator/add/category'] = array(
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'title' => 'Add category',
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'page callback' => 'drupal_get_form',
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'page arguments' => array('aggregator_form_category'),
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'access arguments' => array('administer news feeds'),
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'type' => MENU_LOCAL_TASK,
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'parent' => 'admin/content/aggregator',
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);
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$items['admin/content/aggregator/add/opml'] = array(
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'title' => 'Import OPML',
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'page callback' => 'drupal_get_form',
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'page arguments' => array('aggregator_form_opml'),
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'access arguments' => array('administer news feeds'),
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'type' => MENU_LOCAL_TASK,
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'parent' => 'admin/content/aggregator',
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);
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$items['admin/content/aggregator/remove/%aggregator_feed'] = array(
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'title' => 'Remove items',
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'page callback' => 'drupal_get_form',
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'page arguments' => array('aggregator_admin_remove_feed', 4),
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'access arguments' => array('administer news feeds'),
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'type' => MENU_CALLBACK,
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);
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$items['admin/content/aggregator/update/%aggregator_feed'] = array(
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'title' => 'Update items',
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'page callback' => 'aggregator_admin_refresh_feed',
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'page arguments' => array(4),
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'access arguments' => array('administer news feeds'),
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'type' => MENU_CALLBACK,
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);
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$items['admin/content/aggregator/list'] = array(
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'title' => 'List',
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'type' => MENU_DEFAULT_LOCAL_TASK,
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'weight' => -10,
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);
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$items['admin/content/aggregator/settings'] = array(
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'title' => 'Settings',
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'page callback' => 'drupal_get_form',
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'page arguments' => array('aggregator_admin_form'),
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'type' => MENU_LOCAL_TASK,
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'weight' => 10,
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'access arguments' => array('administer news feeds'),
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);
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$items['aggregator'] = array(
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'title' => 'Feed aggregator',
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'page callback' => 'aggregator_page_last',
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'access arguments' => array('access news feeds'),
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'weight' => 5,
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);
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$items['aggregator/sources'] = array(
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'title' => 'Sources',
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'page callback' => 'aggregator_page_sources',
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'access arguments' => array('access news feeds'),
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);
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$items['aggregator/categories'] = array(
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'title' => 'Categories',
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'page callback' => 'aggregator_page_categories',
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'access callback' => '_aggregator_has_categories',
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);
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$items['aggregator/rss'] = array(
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'title' => 'RSS feed',
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'page callback' => 'aggregator_page_rss',
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'access arguments' => array('access news feeds'),
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'type' => MENU_CALLBACK,
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);
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$items['aggregator/opml'] = array(
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'title' => 'OPML feed',
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'page callback' => 'aggregator_page_opml',
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'access arguments' => array('access news feeds'),
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'type' => MENU_CALLBACK,
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);
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$items['aggregator/categories/%aggregator_category'] = array(
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'title callback' => '_aggregator_category_title',
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'title arguments' => array(2),
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'page callback' => 'aggregator_page_category',
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'page arguments' => array(2),
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'access callback' => 'user_access',
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'access arguments' => array('access news feeds'),
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);
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$items['aggregator/categories/%aggregator_category/view'] = array(
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'title' => 'View',
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'type' => MENU_DEFAULT_LOCAL_TASK,
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'weight' => -10,
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);
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$items['aggregator/categories/%aggregator_category/categorize'] = array(
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'title' => 'Categorize',
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'page callback' => 'drupal_get_form',
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'page arguments' => array('aggregator_page_category', 2),
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'access arguments' => array('administer news feeds'),
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'type' => MENU_LOCAL_TASK,
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);
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$items['aggregator/categories/%aggregator_category/configure'] = array(
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'title' => 'Configure',
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'page callback' => 'drupal_get_form',
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'page arguments' => array('aggregator_form_category', 2),
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'access arguments' => array('administer news feeds'),
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'type' => MENU_LOCAL_TASK,
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'weight' => 1,
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);
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$items['aggregator/sources/%aggregator_feed'] = array(
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'page callback' => 'aggregator_page_source',
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'page arguments' => array(2),
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'access arguments' => array('access news feeds'),
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'type' => MENU_CALLBACK,
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);
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$items['aggregator/sources/%aggregator_feed/view'] = array(
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'title' => 'View',
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'type' => MENU_DEFAULT_LOCAL_TASK,
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'weight' => -10,
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);
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$items['aggregator/sources/%aggregator_feed/categorize'] = array(
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'title' => 'Categorize',
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'page callback' => 'drupal_get_form',
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'page arguments' => array('aggregator_page_source', 2),
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'access arguments' => array('administer news feeds'),
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'type' => MENU_LOCAL_TASK,
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);
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$items['aggregator/sources/%aggregator_feed/configure'] = array(
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'title' => 'Configure',
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'page callback' => 'drupal_get_form',
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'page arguments' => array('aggregator_form_feed', 2),
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'access arguments' => array('administer news feeds'),
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'type' => MENU_LOCAL_TASK,
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'weight' => 1,
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);
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$items['admin/content/aggregator/edit/feed/%aggregator_feed'] = array(
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'title' => 'Edit feed',
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'page callback' => 'drupal_get_form',
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'page arguments' => array('aggregator_form_feed', 5),
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'access arguments' => array('administer news feeds'),
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'type' => MENU_CALLBACK,
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);
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$items['admin/content/aggregator/edit/category/%aggregator_category'] = array(
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'title' => 'Edit category',
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'page callback' => 'drupal_get_form',
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'page arguments' => array('aggregator_form_category', 5),
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'access arguments' => array('administer news feeds'),
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'type' => MENU_CALLBACK,
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);
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return $items;
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}
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/**
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* Menu callback.
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*
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* @return
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* An aggregator category title.
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*/
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function _aggregator_category_title($category) {
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return $category['title'];
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}
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/**
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* Implementation of hook_init().
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*/
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function aggregator_init() {
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drupal_add_css(drupal_get_path('module', 'aggregator') . '/aggregator.css');
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}
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/**
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* Find out whether there are any aggregator categories.
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*
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* @return
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* TRUE if there is at least one category and the user has access to them, FALSE otherwise.
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*/
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function _aggregator_has_categories() {
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return user_access('access news feeds') && db_query('SELECT COUNT(*) FROM {aggregator_category}')->fetchField();
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}
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/**
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* Implementation of hook_perm().
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*/
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function aggregator_perm() {
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return array(
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'administer news feeds' => array(
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'title' => t('Administer news feeds'),
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'description' => t('Add, edit or delete news feeds that are aggregated to your site.'),
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),
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'access news feeds' => array(
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'title' => t('Access news feeds'),
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'description' => t('View aggregated news feed items.'),
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),
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);
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}
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/**
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* Implementation of hook_cron().
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*
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* Checks news feeds for updates once their refresh interval has elapsed.
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*/
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function aggregator_cron() {
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$result = db_query('SELECT * FROM {aggregator_feed} WHERE checked + refresh < :time', array(':time' => REQUEST_TIME));
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foreach ($result as $feed) {
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aggregator_refresh($feed);
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}
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}
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/**
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* Implementation of hook_block_list().
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*/
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function aggregator_block_list() {
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$block = array();
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$result = db_query('SELECT cid, title FROM {aggregator_category} ORDER BY title');
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foreach ($result as $category) {
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$block['category-' . $category->cid]['info'] = t('!title category latest items', array('!title' => $category->title));
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}
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$result = db_query('SELECT fid, title FROM {aggregator_feed} WHERE block <> 0 ORDER BY fid');
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foreach ($result as $feed) {
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$block['feed-' . $feed->fid]['info'] = t('!title feed latest items', array('!title' => $feed->title));
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}
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return $block;
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}
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/**
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* Implementation of hook_block_configure().
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*/
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function aggregator_block_configure($delta = '') {
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list($type, $id) = explode('-', $delta);
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if ($type == 'category') {
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$value = db_query('SELECT block FROM {aggregator_category} WHERE cid = :cid', array(':cid' => $id))->fetchField();
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$form['block'] = array(
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'#type' => 'select',
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'#title' => t('Number of news items in block'),
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'#default_value' => $value,
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'#options' => drupal_map_assoc(array(2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20))
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);
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return $form;
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}
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}
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/**
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* Implementation of hook_block_save().
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*/
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function aggregator_block_save($delta = '', $edit = array()) {
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list($type, $id) = explode('-', $delta);
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if ($type == 'category') {
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db_update('aggregator_category')
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->fields(array('block' => $edit['block']))
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->condition('cid', $id)
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->execute();
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}
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}
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/**
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* Implementation of hook_block_view().
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*
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* Generates blocks for the latest news items in each category and feed.
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*/
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function aggregator_block_view($delta = '') {
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if (user_access('access news feeds')) {
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$block = array();
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list($type, $id) = explode('-', $delta);
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switch ($type) {
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case 'feed':
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if ($feed = db_query('SELECT fid, title, block FROM {aggregator_feed} WHERE block <> 0 AND fid = :fid', array(':fid' => $id))->fetchObject()) {
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$block['subject'] = check_plain($feed->title);
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$result = db_query_range("SELECT * FROM {aggregator_item} WHERE fid = :fid ORDER BY timestamp DESC, iid DESC", array(':fid' => $id), 0, $feed->block);
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$read_more = theme('more_link', url('aggregator/sources/' . $feed->fid), t("View this feed's recent news."));
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}
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break;
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case 'category':
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if ($category = db_query('SELECT cid, title, block FROM {aggregator_category} WHERE cid = :cid', array(':cid' => $id))->fetchObject()) {
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$block['subject'] = check_plain($category->title);
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$result = db_query_range('SELECT i.* FROM {aggregator_category_item} ci LEFT JOIN {aggregator_item} i ON ci.iid = i.iid WHERE ci.cid = :cid ORDER BY i.timestamp DESC, i.iid DESC', array(':cid' => $category->cid), 0, $category->block);
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$read_more = theme('more_link', url('aggregator/categories/' . $category->cid), t("View this category's recent news."));
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}
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break;
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}
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$items = array();
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foreach ($result as $item) {
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$items[] = theme('aggregator_block_item', $item);
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}
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// Only display the block if there are items to show.
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if (count($items) > 0) {
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$block['content'] = theme('item_list', $items) . $read_more;
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}
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return $block;
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}
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}
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/**
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* Add/edit/delete aggregator categories.
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*
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* @param $edit
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* An associative array describing the category to be added/edited/deleted.
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*/
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function aggregator_save_category($edit) {
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$link_path = 'aggregator/categories/';
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if (!empty($edit['cid'])) {
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$link_path .= $edit['cid'];
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if (!empty($edit['title'])) {
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db_merge('aggregator_category')
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->key(array('cid' => $edit['cid']))
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->fields(array(
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'title' => $edit['title'],
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'description' => $edit['description'],
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))
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->execute();
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$op = 'update';
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}
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else {
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db_delete('aggregator_category')
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->condition('cid', $edit['cid'])
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->execute();
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// Make sure there is no active block for this category.
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db_delete('block')
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->condition('module', 'aggregator')
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->condition('delta', 'category-' . $edit['cid'])
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->execute();
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$edit['title'] = '';
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$op = 'delete';
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}
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}
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elseif (!empty($edit['title'])) {
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// A single unique id for bundles and feeds, to use in blocks.
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$link_path .= db_insert('aggregator_category')
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->fields(array(
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'title' => $edit['title'],
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'description' => $edit['description'],
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'block' => 5,
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))
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->execute();
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$op = 'insert';
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}
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if (isset($op)) {
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menu_link_maintain('aggregator', $op, $link_path, $edit['title']);
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}
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}
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/**
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* Add/edit/delete an aggregator feed.
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*
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* @param $edit
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* An associative array describing the feed to be added/edited/deleted.
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*/
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function aggregator_save_feed($edit) {
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if (!empty($edit['fid'])) {
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// An existing feed is being modified, delete the category listings.
|
|
db_delete('aggregator_category_feed')
|
|
->condition('fid', $edit['fid'])
|
|
->execute();
|
|
}
|
|
if (!empty($edit['fid']) && !empty($edit['title'])) {
|
|
db_update('aggregator_feed')
|
|
->condition('fid', $edit['fid'])
|
|
->fields(array(
|
|
'title' => $edit['title'],
|
|
'url' => $edit['url'],
|
|
'refresh' => $edit['refresh'],
|
|
'block' => $edit['block'],
|
|
))
|
|
->execute();
|
|
}
|
|
elseif (!empty($edit['fid'])) {
|
|
$iids = db_query('SELECT iid FROM {aggregator_item} WHERE fid = :fid', array(':fid' => $edit['fid']))->fetchCol();
|
|
if ($iids) {
|
|
db_delete('aggregator_category_item')
|
|
->condition('iid', $iids, 'IN')
|
|
->execute();
|
|
}
|
|
db_delete('aggregator_feed')->
|
|
condition('fid', $edit['fid'])
|
|
->execute();
|
|
db_delete('aggregator_item')
|
|
->condition('fid', $edit['fid'])
|
|
->execute();
|
|
// Make sure there is no active block for this feed.
|
|
db_delete('block')
|
|
->condition('module', 'aggregator')
|
|
->condition('delta', 'feed-' . $edit['fid'])
|
|
->execute();
|
|
}
|
|
elseif (!empty($edit['title'])) {
|
|
$edit['fid'] = db_insert('aggregator_feed')
|
|
->fields(array(
|
|
'title' => $edit['title'],
|
|
'url' => $edit['url'],
|
|
'refresh' => $edit['refresh'],
|
|
'block' => $edit['block'],
|
|
'description' => '',
|
|
'image' => '',
|
|
))
|
|
->execute();
|
|
|
|
}
|
|
if (!empty($edit['title'])) {
|
|
// The feed is being saved, save the categories as well.
|
|
if (!empty($edit['category'])) {
|
|
foreach ($edit['category'] as $cid => $value) {
|
|
if ($value) {
|
|
db_merge('aggregator_category_feed')
|
|
->key(array('fid' => $edit['fid']))
|
|
->fields(array(
|
|
'cid' => $cid,
|
|
))
|
|
->execute();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Removes all items from a feed.
|
|
*
|
|
* @param $feed
|
|
* An object describing the feed to be cleared.
|
|
*/
|
|
function aggregator_remove($feed) {
|
|
// Call hook_aggregator_remove() on all modules.
|
|
module_invoke_all('aggregator_remove', $feed);
|
|
// Reset feed.
|
|
db_merge('aggregator_feed')
|
|
->key(array('fid' => $feed->fid))
|
|
->fields(array(
|
|
'checked' => 0,
|
|
'hash' => '',
|
|
'etag' => '',
|
|
'modified' => 0,
|
|
'description' => $feed->description,
|
|
'image' => $feed->image,
|
|
))
|
|
->execute();
|
|
}
|
|
|
|
/**
|
|
* Checks a news feed for new items.
|
|
*
|
|
* @param $feed
|
|
* An object describing the feed to be refreshed.
|
|
*/
|
|
function aggregator_refresh($feed) {
|
|
// Fetch the feed.
|
|
$fetcher = variable_get('aggregator_fetcher', 'aggregator');
|
|
module_invoke($fetcher, 'aggregator_fetch', $feed);
|
|
|
|
if ($feed->source_string !== FALSE) {
|
|
// Parse the feed.
|
|
$parser = variable_get('aggregator_parser', 'aggregator');
|
|
module_invoke($parser, 'aggregator_parse', $feed);
|
|
|
|
// If there are items on the feed, let all enabled processors do their work on it.
|
|
if (@count($feed->items)) {
|
|
$processors = variable_get('aggregator_processors', array('aggregator'));
|
|
foreach ($processors as $processor) {
|
|
module_invoke($processor, 'aggregator_process', $feed);
|
|
}
|
|
}
|
|
}
|
|
// Expire old feed items.
|
|
if (drupal_function_exists('aggregator_expire')) {
|
|
aggregator_expire($feed);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Load an aggregator feed.
|
|
*
|
|
* @param $fid
|
|
* The feed id.
|
|
* @return
|
|
* An object describing the feed.
|
|
*/
|
|
function aggregator_feed_load($fid) {
|
|
static $feeds;
|
|
if (!isset($feeds[$fid])) {
|
|
$feeds[$fid] = db_query('SELECT * FROM {aggregator_feed} WHERE fid = :fid', array(':fid' => $fid))->fetchObject();
|
|
}
|
|
|
|
return $feeds[$fid];
|
|
}
|
|
|
|
/**
|
|
* Load an aggregator category.
|
|
*
|
|
* @param $cid
|
|
* The category id.
|
|
* @return
|
|
* An associative array describing the category.
|
|
*/
|
|
function aggregator_category_load($cid) {
|
|
static $categories;
|
|
if (!isset($categories[$cid])) {
|
|
$categories[$cid] = db_query('SELECT * FROM {aggregator_category} WHERE cid = :cid', array(':cid' => $cid))->fetchAssoc();
|
|
}
|
|
|
|
return $categories[$cid];
|
|
}
|
|
|
|
/**
|
|
* Format an individual feed item for display in the block.
|
|
*
|
|
* @param $item
|
|
* The item to be displayed.
|
|
* @param $feed
|
|
* Not used.
|
|
* @return
|
|
* The item HTML.
|
|
* @ingroup themeable
|
|
*/
|
|
function theme_aggregator_block_item($item, $feed = 0) {
|
|
|
|
// Display the external link to the item.
|
|
return '<a href="' . check_url($item->link) . '">' . check_plain($item->title) . "</a>\n";
|
|
|
|
}
|
|
|
|
/**
|
|
* Safely render HTML content, as allowed.
|
|
*
|
|
* @param $value
|
|
* The content to be filtered.
|
|
* @return
|
|
* The filtered content.
|
|
*/
|
|
function aggregator_filter_xss($value) {
|
|
return filter_xss($value, preg_split('/\s+|<|>/', variable_get('aggregator_allowed_html_tags', '<a> <b> <br> <dd> <dl> <dt> <em> <i> <li> <ol> <p> <strong> <u> <ul>'), -1, PREG_SPLIT_NO_EMPTY));
|
|
}
|
|
|
|
/**
|
|
* Check and sanitize aggregator configuration.
|
|
*
|
|
* Goes through all fetchers, parsers and processors and checks whether they are available.
|
|
* If one is missing resets to standard configuration.
|
|
*
|
|
* @return
|
|
* TRUE if this function reset the configuration FALSE if not.
|
|
*/
|
|
function aggregator_sanitize_configuration() {
|
|
$reset = FALSE;
|
|
$fetcher = variable_get('aggregator_fetcher', 'aggregator');
|
|
if (!module_exists($fetcher)) {
|
|
$reset = TRUE;
|
|
}
|
|
$parser = variable_get('aggregator_parser', 'aggregator');
|
|
if (!module_exists($parser)) {
|
|
$reset = TRUE;
|
|
}
|
|
$processors = variable_get('aggregator_processors', array('aggregator'));
|
|
foreach ($processors as $processor) {
|
|
if (!module_exists($processor)) {
|
|
$reset = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
if ($reset) {
|
|
variable_del('aggregator_fetcher');
|
|
variable_del('aggregator_parser');
|
|
variable_del('aggregator_processors');
|
|
return TRUE;
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
/**
|
|
* Helper function for drupal_map_assoc.
|
|
*
|
|
* @param $count
|
|
* Items count.
|
|
* @return
|
|
* Plural-formatted "@count items"
|
|
*/
|
|
function _aggregator_items($count) {
|
|
return format_plural($count, '1 item', '@count items');
|
|
}
|