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<?php
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/**
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* $Id: diggthis.module,v 1.23 2008/09/10 22:06:08 yaph Exp $
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*
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* @file
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* Author: Ramiro Gómez - http://www.ramiro.org
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* A Drupal module that adds a Digg this button to your nodes.
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* The code of this module is partially based on the
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* service links module by Fredrik Jonsson
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*
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* @see apidoc.digg.com
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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 diggthis_menu() {
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$items = array();
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$items['admin/content/diggthis'] = array(
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'title' => 'Diggthis',
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'description' => 'Enable the node types and set the properties for the diggthis button.',
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'page callback' => 'drupal_get_form',
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'page arguments' => array('diggthis_admin_settings'),
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'access arguments' => array('administer site configuration'),
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'type' => MENU_NORMAL_ITEM,
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'file' => 'diggthis.admin.inc'
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);
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$items['diggthis/top-stories'] = array(
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'title' => 'Digg Top Stories',
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'page callback' => 'diggthis_top_stories',
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'access arguments' => array('access digg stories'),
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'type' => MENU_NORMAL_ITEM,
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'file' => 'diggthis.pages.inc'
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);
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return $items;
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}
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/**
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* Implementation of hook_theme
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*/
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function diggthis_theme() {
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return array(
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'diggthis_button' => array(
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'arguments' => array('js_code' => NULL)
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),
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'diggthis_story' => array(
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'arguments' => array('story' => NULL)
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)
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);
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}
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/**
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* Implementation of hook_perm
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*/
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function diggthis_perm() {
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return array('access digg stories');
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}
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/**
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* Implementation of hook_nodeapi().
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*/
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function diggthis_nodeapi(&$node, $op, $a3 = NULL, $a4 = NULL) {
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// we're in full node view
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if ($op == 'view' && !$a3) {
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if (in_array($node->type, variable_get('diggthis_node_types', array()), TRUE)) {
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$node->content['diggthis_button'] = array(
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'#value' => diggthis_button_create($node),
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'#weight' => variable_get('diggthis_button_weight', 10)
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);
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}
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}
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}
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/**
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* Implementaiton of hook_block
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*/
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function diggthis_block($op = 'list', $delta = 0, $edit = array()) {
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$blocks = array();
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switch ( $op ) {
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case 'list':
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$blocks[0] = array(
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'info' => t('Digg This'),
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'weight' => 0
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);
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break;
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case 'view':
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if ('admin' != arg(0)) {
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$blocks['content'] = diggthis_button_create();
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$blocks['subject'] = variable_get('diggthis_block_title_'.$delta, t('Digg this'));
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break;
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}
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}
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return $blocks;
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}
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/**
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* A function that generates the JavaScript
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* code for embedding hte diggthis button
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*
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* @param $node
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* an optional node object
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*/
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function diggthis_button_create($node = false) {
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// we are in node view
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if ($node) {
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$path = 'node/'. $node->nid;
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$title = check_plain($node->title);
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$teaser = strip_tags($node->teaser);
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}
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elseif ('admin' != arg(0)){
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$path = check_plain($_GET['q']);
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$title = drupal_get_title();
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$teaser = '';
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// block display in node view
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if ('node' == arg(0)
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&& is_numeric(arg(1))
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&& !arg(2)) {
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$node = node_load(arg(1));
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$teaser = strip_tags($node->teaser);
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}
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}
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// get the absolute URL of the current page
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$url = url($path, array('absolute' => TRUE));
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// make sure strings are not to long
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$title = truncate_utf8($title, 60, TRUE, FALSE);
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$teaser = drupal_to_js(truncate_utf8($teaser, 350, TRUE, FALSE));
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// only change the background color if configured
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$bgcolor = variable_get('diggthis_button_bgcolor', '');
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if ($bgcolor) {
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$bg_string = "digg_bgcolor = '$bgcolor';";
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}
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$skin = variable_get('diggthis_button_skin', 'standard');
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$digg_js =<<<EOF
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<script type="text/javascript"><!--
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digg_url = '$url';
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digg_title = '$title';
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digg_bodytext = $teaser;
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digg_skin = '$skin';
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$bg_string
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//-->
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</script>
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<script src="http://digg.com/tools/diggthis.js" type="text/javascript"></script>
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EOF;
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return theme('diggthis_button', $digg_js);
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}
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/**
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* Theme function for button display
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*
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* @param $js_code
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* The JavaScript code to display the diggthis button
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*/
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function theme_diggthis_button($js_code) {
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return '<div class="diggthis_button">'. $js_code .'</div>';
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}
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/**
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* Do the Digg API request and retrieve the XML feed
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* with the top Digg stories for a given domain.
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*
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* @return $xml
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* The XML string as returned by the Digg Web Service
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*/
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function diggthis_request($query_string) {
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$api_url = 'http://services.digg.com/stories';
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//$request_url = url($api_url, $options);
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$request_url = $api_url . $query_string;
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$xml = '';
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$cache = cache_get($request_url, 'cache');
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if(is_object($cache) && $cache->expire > time()) {
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$xml = $cache->data;
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}
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else {
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cache_clear_all($request_url, 'cache');
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$response = drupal_http_request($request_url);
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if (200 == $response->code) {
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// cache the XML string since unserializing simplexml objects does not work
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$xml = $response->data;
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cache_set($request_url, $xml, 'cache', time() + variable_get('diggthis_cache_lifetime', 43200));
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}
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else {
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watchdog('diggthis', 'Digg top stories could not be retrieved. Server response: "%response"',
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array('%response' => var_export($response, TRUE)), WATCHDOG_WARNING);
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return FALSE;
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}
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}
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return $xml;
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}
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/**
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* Theme function to markup a single digg story
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*
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* @param $data
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* A PHP SimpleXML object
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*
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* @return $html
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* An HTML string with markup for a Digg story
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*/
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function theme_diggthis_story($story) {
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$html = '';
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$digg_link = l(t('Diggs received: !diggs', array('!diggs' => $story['diggs'])),
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$story['href'], array('absolute' => TRUE));
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$story_link = l($story->title, $story['link'], array('absolute' => TRUE));
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$html .= '<div class="digg-story">';
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$html .= '<h3 class="digg-story-title">' . $story_link . '</h3>';
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$html .= '<div class="digg-story-description">' . $story->description . '</div>';
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$html .= '<div class="digg-story-diggs">' . $digg_link . '</div>';
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$html .= '</div>';
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return $html;
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}
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