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<?php
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/**
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* @defgroup lastfmsimple Last.fm Simple Stats: simple Last.fm user statistics parser.
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*
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* This module can fetch user statistics from Last.fm's Audioscrobbler web
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* services, cache them in the database and perform customisable and intelligent
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* updates.
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*/
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/**
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* @file
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* Last.fm Simple Stats module file.
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*
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* @ingroup lastfmsimple
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*/
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global $_lastfmsimple_username_field;
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define('LASTFMSIMPLE_UPDATE_CRON', 0);
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define('LASTFMSIMPLE_UPDATE_REQUEST', 1);
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define('LASTFMSIMPLE_UPDATE_DEFAULT', LASTFMSIMPLE_UPDATE_REQUEST);
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define('LASTFMSIMPLE_STATLINE_LINK', 0);
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define('LASTFMSIMPLE_STATLINE_TEXT', 1);
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define('LASTFMSIMPLE_STATLINE_DEFAULT', LASTFMSIMPLE_STATLINE_LINK);
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define('LASTFMSIMPLE_BLOCK_STAT_TYPE_WEEKLYARTISTCHART', "weeklyartistchart");
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define('LASTFMSIMPLE_BLOCK_STAT_TYPE_RECENTTRACKS', "recenttracks");
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/**
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* Implementation of hook_init().
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*/
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function lastfmsimple_init() {
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global $_lastfmsimple_username_field;
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$_lastfmsimple_username_field = _lastfmsimple_get_field(variable_get('lastfmsimple_username_field_id', NULL));
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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 lastfmsimple_help($path, $arg) {
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switch ($path) {
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case 'admin/help#lastfmsimple':
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return '<p>'. t('This module ables you to load in user statistics from Last.fm\'s Audioscrobbler web services. The statistics can be shown using <code>lastfmsimple_show_feed($user, $type, $count)</code>, which returns an array of item objects.') .'</p>';
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}
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}
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/**
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* Implementation of the hook_block().
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* Generate HTML for the lastfmsimple block
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* @param op the operation from the URL
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* @param delta offset
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* @returns block HTML
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*/
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function lastfmsimple_block($op='list', $delta=0) {
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global $user;
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global $_lastfmsimple_username_field;
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// If the _lastfmsimple_username_field hasn't been set yet, do not continue
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if (!isset($_lastfmsimple_username_field)) {
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return;
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}
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// listing of blocks, such as on the admin/block page
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if ($op == "list") {
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$block[0]["info"] = t("Last.fm Simple Stats");
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return $block;
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} else if ($op == 'view') {
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// content variable that will be returned for display
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$block_content = '';
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$result = db_query("SELECT * FROM {profile_values} WHERE uid = %d AND fid = %d", $user->uid, variable_get('lastfmsimple_username_field_id', NULL));
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$lastfmuser = db_fetch_object($result);
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if ($lastfmuser !== FALSE) {
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$content = lastfmsimple_show_feed($lastfmuser->value, variable_get('lastfmsimple_block_stattype', NULL), "10");
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// setting up the block
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$block_content = _lastfmsimple_create_content($content, variable_get('lastfmsimple_block_stattype', NULL));
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}
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// check to see if there was any content before setting up the block
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if ($block_content == '') {
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// no content from a week ago, return nothing.
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return;
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}
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// set up the block
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$block['subject'] = 'Last.fm Stats';
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$block['content'] = $block_content;
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return $block;
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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 lastfmsimple_menu() {
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return array(
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'admin/settings/lastfmsimple' => array(
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'title' => 'Last.fm Simple Stats',
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'description' => 'Configure Last.fm Simple Stats settings.',
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'page callback' => 'drupal_get_form',
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'page arguments' => array('lastfmsimple_admin_settings'),
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'access arguments' => array('administer site configuration'),
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'file' => 'lastfmsimple.admin.inc',
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),
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);
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}
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/**
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* Return an array of item objects for a feed.
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*
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* @param $user
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* A string containing the Last.fm user name.
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* @param $type
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* A string containing the feed type. By default: "recenttracks".
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* @param $count
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* The number of items to be shown. By default: 10.
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* @return
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* An array of item objects.
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*/
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function lastfmsimple_show_feed($user, $type = 'recenttracks', $count = 10) {
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// Only these are tested/supported (for now).
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if (!in_array($type, array('recenttracks', 'weeklyartistchart'))) {
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return array();
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}
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// Get the feed.
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$feed = db_fetch_object(db_query("SELECT * FROM {lastfmsimple_feed} WHERE usr = '%s' AND feed_type = '%s'", $user, $type));
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if ($feed === FALSE) {
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// New feed.
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$id = _lastfmsimple_new_feed($user, $type, $count);
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}
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else {
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// Existing feed.
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if ($count > $feed->current_count && $count <= $feed->max_count) {
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// Need more items while possible, update.
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_lastfmsimple_update_feed($feed, $count);
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}
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elseif ((int) variable_get('lastfmsimple_update_method', LASTFMSIMPLE_UPDATE_DEFAULT) === LASTFMSIMPLE_UPDATE_REQUEST) {
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// Updating is done on request.
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if ($feed->expires > 0) {
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// There's an Expires header set, update when it's in the past.
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$update = ($feed->expires <= time());
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}
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else {
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// When the interval is zero (update always), do so;
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// otherwise, update when the previous update is too long ago.
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$interval = (int) variable_get('lastfmsimple_interval', 5);
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$update = $interval === 0 ? TRUE : ($feed->updated <= (time() - $interval * 60));
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}
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// Do the update.
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if ($update) {
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_lastfmsimple_update_feed($feed);
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}
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}
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$id = $feed->fid;
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}
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// Get the items for this feed.
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$result = db_query_range("SELECT name, url, item_data FROM {lastfmsimple_item} WHERE fid = %d ORDER BY iid ASC", $id, 0, $count);
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// Fetch items as objects into an array.
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$items = array();
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while ($item = db_fetch_object($result)) {
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// Unserialize item_data and assign values as properties, if present.
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if (!empty($item->item_data)) {
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foreach (unserialize($item->item_data) as $key => $val) {
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$item->$key = $val;
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}
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}
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// Unset item_data.
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unset($item->item_data);
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$items[] = $item;
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}
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return $items;
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}
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/**
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* Implementation of hook_cron().
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*/
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function lastfmsimple_cron() {
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// Cron is unused.
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if ((int) variable_get('lastfmsimple_update_method', LASTFMSIMPLE_UPDATE_DEFAULT) !== LASTFMSIMPLE_UPDATE_CRON) {
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return;
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}
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$interval = (int) variable_get('lastfmsimple_interval', 5);
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if ($interval === 0) {
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// Update all the feeds without Expires and with an Expires in the past.
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$result = db_query("SELECT * FROM {lastfmsimple_feed} WHERE expires <= %d", time());
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}
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else {
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// Update all the feeds without Expires but updated too long ago or with an Expires in the past.
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$result = db_query("SELECT * FROM {lastfmsimple_feed} WHERE (expires = 0 AND updated <= %d) OR (expires > 0 AND expires <= %d)", (time() - $interval * 60), time());
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}
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// Update all of them.
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while ($feed = db_fetch_object($result)) {
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_lastfmsimple_update_feed($feed);
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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 lastfmsimple_theme() {
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return array(
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'lastfmsimple_show_recenttracks' => array(
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'arguments' => array('content' => NULL),
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),
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'lastfmsimple_show_weeklyartistchart' => array(
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'arguments' => array('content' => NULL),
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),
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);
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}
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/**
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* Create block content based on statistic type.
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*
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* @param $content
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* Result of the feed query.
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* @param $type
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* String containing the selected feed type.
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* @return unknown
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* Returns the formatted block content.
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*/
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function _lastfmsimple_create_content($content, $type) {
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switch ($type) {
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case 'recenttracks':
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return theme('lastfmsimple_show_recenttracks',$content);
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case 'weeklyartistchart':
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return theme('lastfmsimple_show_weeklyartistchart',$content);
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}
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}
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/**
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* Create block content for recenttracks stat.
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*
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* @param $content
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* Result of the feed query.
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* @return unknown
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* Returns the formatted block content.
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*/
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function theme_lastfmsimple_show_recenttracks($content) {
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// setting up the block
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$statline = variable_get('lastfmsimple_statline_display', LASTFMSIMPLE_STATLINE_DEFAULT);
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$block_content = '<ol>';
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foreach ( $content as $item ):
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if ($statline == LASTFMSIMPLE_STATLINE_LINK) {
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$block_content .= '<li><a href="'. $item->url . '">' . $item->artist . ' - ' . $item->name . '</a></li>';
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} else {
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$block_content .= '<li>' . $item->artist . ' - ' . $item->name . '</li>';
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}
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endforeach;
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$block_content .= '</ol>';
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return $block_content;
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}
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/**
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* Create block content for weeklyartistchart stat.
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*
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* @param $content
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* Result of the feed query.
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* @return unknown
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* Returns the formatted block content.
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*/
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function theme_lastfmsimple_show_weeklyartistchart($content) {
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// setting up the block
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$statline = variable_get('lastfmsimple_statline_display', LASTFMSIMPLE_STATLINE_DEFAULT);
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$block_content = '<ol>';
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foreach ( $content as $item ):
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if ($statline == LASTFMSIMPLE_STATLINE_LINK) {
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$block_content .= '<li><a href="'. $item->url . '">' . $item->name . '</a> (' . $item->playcount . ')</li>';
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} else {
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$block_content .= '<li>' . $item->name . ' (' . $item->playcount . ')</li>';
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}
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endforeach;
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$block_content .= '</ol>';
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return $block_content;
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}
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/**
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* Create a new feed that is not yet in the database.
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*
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* @param $user
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* A string containing the Last.fm user name.
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* @param $type
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* A string containing the feed type.
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* @param $count
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* The number of items to be shown.
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* @return
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* The ID for the feed just created.
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*/
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function _lastfmsimple_new_feed($user, $type, $count) {
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// Fetch the feed.
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$request = _lastfmsimple_fetch_feed($user, $type);
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if ($request === FALSE) {
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return;
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}
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// Insert into the database.
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db_query("INSERT INTO {lastfmsimple_feed} (usr, feed_type, updated, modified, expires, current_count, max_count, fetches, updates) VALUES ('%s', '%s', %d, %d, %d, %d, %d, 1, 1)", $user, $type, time(), $request['headers']['Last-Modified'], $request['headers']['Expires'], $count, $request['max_count']);
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// Feed ID.
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$id = db_last_insert_id('lastfmsimple_feed', 'fid');
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// Parse the feed data.
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_lastfmsimple_parse_feed($request['data'], $id, $request['element'], $count);
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return $id;
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}
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/**
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* Update an existing feed.
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*
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* Supplying a $count will disable the usage of If-Modified-Since, thus always
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* parsing the feed.
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*
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* @param $feed
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* The feed object.
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* @param $count
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* Optional number of items, when being changed.
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*/
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function _lastfmsimple_update_feed(&$feed, $count = NULL) {
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if ($count === NULL) {
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// Count is not being changed, use the current count and fetch using the Last-Modified header.
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$count = (int) $feed->current_count;
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$request = _lastfmsimple_fetch_feed($feed->usr, $feed->feed_type, $feed->modified);
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}
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else {
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// Count is being changed, fetch without the Last-Modified header.
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$request = _lastfmsimple_fetch_feed($feed->usr, $feed->feed_type);
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}
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if ($request === FALSE) {
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return;
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}
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// The feed was not modified, update the feed's row and return.
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if ($request['not_modified']) {
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db_query("UPDATE {lastfmsimple_feed} SET updated = %d, fetches = fetches + 1 WHERE fid = %d", time(), $feed->fid);
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return;
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}
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// Remove existing items.
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db_query("DELETE FROM {lastfmsimple_item} WHERE fid = %d", $feed->fid);
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// Parse the feed data.
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_lastfmsimple_parse_feed($request['data'], $feed->fid, $request['element'], $count);
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// Update the feed's row.
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db_query("UPDATE {lastfmsimple_feed} SET updated = %d, modified = %d, expires = %d, current_count = %d, max_count = %d, fetches = fetches + 1, updates = updates + 1 WHERE fid = %d", time(), $request['headers']['Last-Modified'], $request['headers']['Expires'], $count, $request['max_count'], $feed->fid);
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}
|
| 362 |
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/**
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* Fetch a feed.
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| 365 |
*
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* @param $user
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* A string containing the Last.fm user name.
|
| 368 |
* @param $type
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* A string containing the feed type.
|
| 370 |
* @param $modified_since
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| 371 |
* UNIX timestamp containing Modified-Since date (optional).
|
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* @return
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* Array containing data, array of headers, not_modified boolean, element name and max_count.
|
| 374 |
*/
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function _lastfmsimple_fetch_feed($user, $type, $modified_since = 0) {
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// Use an If-Modified-Since header when possible.
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| 377 |
$headers = $modified_since > 0 ? array('If-Modified-Since' => gmdate('D, d M Y H:i:s', $modified_since)) : array();
|
| 378 |
|
| 379 |
// Do a HTTP request.
|
| 380 |
$request = drupal_http_request('http://ws.audioscrobbler.com/1.0/user/'. urlencode($user) .'/'. $type .'.xml', $headers);
|
| 381 |
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| 382 |
// Response code.
|
| 383 |
$code = (int) $request->code;
|
| 384 |
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| 385 |
// Something went wrong.
|
| 386 |
if (!in_array($code, array(200, 302, 304, 307))) {
|
| 387 |
watchdog('lastfmsimple', 'Feed %feed for user %user could not be fetched: %error.', array(
|
| 388 |
'%user' => $user,
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| 389 |
'%feed' => $type,
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| 390 |
'%error' => $request->code .' '. $request->error
|
| 391 |
), WATCHDOG_WARNING);
|
| 392 |
|
| 393 |
return FALSE;
|
| 394 |
}
|
| 395 |
|
| 396 |
// What's the item's element?
|
| 397 |
$element = array(
|
| 398 |
'recenttracks' => 'track',
|
| 399 |
'weeklyartistchart' => 'artist'
|
| 400 |
);
|
| 401 |
$element = $element[$type];
|
| 402 |
|
| 403 |
$expires = array_key_exists('Expires', $request->headers) ? strtotime($request->headers['Expires']) : 0;
|
| 404 |
|
| 405 |
return array(
|
| 406 |
'data' => $request->data,
|
| 407 |
'headers' => array(
|
| 408 |
'Last-Modified' => array_key_exists('Last-Modified', $request->headers) ? strtotime($request->headers['Last-Modified']) : 0,
|
| 409 |
// Do not use Expires when it's in the past.
|
| 410 |
'Expires' => $expires > time() ? $expires : 0,
|
| 411 |
),
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| 412 |
// Feed was not modified when we got response code 304.
|
| 413 |
'not_modified' => ($code === 304),
|
| 414 |
'element' => $element,
|
| 415 |
// Number of feed items present.
|
| 416 |
'max_count' => substr_count($request->data, '<'. $element),
|
| 417 |
);
|
| 418 |
}
|
| 419 |
|
| 420 |
/**
|
| 421 |
* Parse a feed's data.
|
| 422 |
*
|
| 423 |
* @param $data
|
| 424 |
* String of feed data.
|
| 425 |
* @param $id
|
| 426 |
* Feed ID.
|
| 427 |
* @param $element
|
| 428 |
* String containing item's element name.
|
| 429 |
* @param $count
|
| 430 |
* Number of items to parse.
|
| 431 |
*/
|
| 432 |
function _lastfmsimple_parse_feed(&$data, $id, $element, $count) {
|
| 433 |
// Create the parser and get the array.
|
| 434 |
$parser = drupal_xml_parser_create($data);
|
| 435 |
xml_parser_set_option($parser, XML_OPTION_SKIP_WHITE, 1);
|
| 436 |
xml_parse_into_struct($parser, $data, $values);
|
| 437 |
|
| 438 |
// Get a nice array of items.
|
| 439 |
$items = array();
|
| 440 |
$i = 0;
|
| 441 |
foreach ($values as $value) {
|
| 442 |
// Current feed item has ended, start a new one.
|
| 443 |
if (strtolower($value['tag']) == $element && $value['type'] == 'close') {
|
| 444 |
$i++;
|
| 445 |
|
| 446 |
// We do not need any more items.
|
| 447 |
if ($i === $count) {
|
| 448 |
break;
|
| 449 |
}
|
| 450 |
|
| 451 |
continue;
|
| 452 |
}
|
| 453 |
|
| 454 |
// This is a property we want to save.
|
| 455 |
if ($value['type'] == 'complete') {
|
| 456 |
$items[$i][strtolower($value['tag'])] = $value['value'];
|
| 457 |
}
|
| 458 |
}
|
| 459 |
|
| 460 |
// Insert each item.
|
| 461 |
foreach ($items as $item) {
|
| 462 |
$name = $item['name'];
|
| 463 |
$url = $item['url'];
|
| 464 |
unset($item['name'], $item['url']);
|
| 465 |
|
| 466 |
// Serialize the remaining properties.
|
| 467 |
$item_data = count($item) > 0 ? serialize($item) : '';
|
| 468 |
|
| 469 |
// Insert new feed item.
|
| 470 |
db_query("INSERT INTO {lastfmsimple_item} (fid, name, url, item_data) VALUES (%d, '%s', '%s', '%s')", $id, $name, $url, $item_data);
|
| 471 |
}
|
| 472 |
}
|
| 473 |
|
| 474 |
/**
|
| 475 |
* Retrieve all fields of type 'textfield' from the profile.module's tables
|
| 476 |
* @return array with fieldnames
|
| 477 |
*/
|
| 478 |
function _lastfmsimple_get_textfield_fields() {
|
| 479 |
$options = array();
|
| 480 |
$result = db_query("SELECT fid, name FROM {profile_fields} WHERE type = 'textfield'");
|
| 481 |
|
| 482 |
while ($field = db_fetch_object($result)) {
|
| 483 |
$options[$field->fid] = $field->name;
|
| 484 |
}
|
| 485 |
|
| 486 |
return $options;
|
| 487 |
}
|
| 488 |
|
| 489 |
|
| 490 |
/**
|
| 491 |
* Retrieve profile field object
|
| 492 |
*
|
| 493 |
* @var string $fid
|
| 494 |
* Id of field to retrieve
|
| 495 |
* @return object
|
| 496 |
* profile field object
|
| 497 |
*/
|
| 498 |
function _lastfmsimple_get_field($fid) {
|
| 499 |
if (isset($fid)) {
|
| 500 |
$field = db_fetch_object(db_query("SELECT * FROM {profile_fields} WHERE fid = %d", $fid));
|
| 501 |
return empty($field) ? NULL : $field;
|
| 502 |
}
|
| 503 |
else {
|
| 504 |
return NULL;
|
| 505 |
}
|
| 506 |
}
|
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