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<?php
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// $Id$
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/**
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* @file
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* Block Filter provides a simple input filter to allow an editor (with permission) to embed any block on the site into the content
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*/
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function block_filter_filter($op, $delta = 0, $format = 1, $text = '') {
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switch ($op) {
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case 'list' :
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return array(t('Block Filter'));
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case 'description' :
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return t('Provides a method of embedding blocks into content');
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case 'process' :
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return preg_replace_callback('#\[block:(.+):(.+)]#s', 'block_filter_embed', $text);
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default :
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return $text;
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}
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}
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function block_filter_embed($match) {
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global $user;
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$theme = variable_get('theme_default', 'garland');
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$module = $match[1];
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$delta = $match[2];
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//Make sure this module implements hook_block
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if (!module_hook($module, 'block')) return '';
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//Get the users roles
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$rids = array_keys($user->roles);
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//Create a placeholder for each role ID
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$placeholders = implode(',', array_fill(0, count($rids), '%d'));
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//Run a query to get the block from the DB (this checks the block is enabled for thie current users role)
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$block = db_fetch_object(db_query("SELECT b.* FROM {blocks} b LEFT JOIN {blocks_roles} r ON b.module = r.module AND b.delta = r.delta WHERE b.module = '%s' AND b.delta = '%s' AND b.theme = '%s' AND (r.rid IN ($placeholders) OR r.rid IS NULL)", array_merge(array($module, $delta, $theme), $rids)));
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// CODE BORROWED FROM block_list
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// Use the user's block visibility setting, if necessary
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if ($block->custom != 0) {
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if ($user->uid && isset($user->block[$block->module][$block->delta])) {
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$enabled = $user->block[$block->module][$block->delta];
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}
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else {
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$enabled = ($block->custom == 1);
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}
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}
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else {
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$enabled = TRUE;
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}
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//Check the page display stuff
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if ($block->pages) {
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if ($block->visibility < 2) {
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$path = drupal_get_path_alias($_GET['q']);
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$regexp = '/^('. preg_replace(array('/(\r\n?|\n)/', '/\\\\\*/', '/(^|\|)\\\\<front\\\\>($|\|)/'), array('|', '.*', '\1'. preg_quote(variable_get('site_frontpage', 'node'), '/') .'\2'), preg_quote($block->pages, '/')) .')$/';
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// Compare with the internal and path alias (if any).
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$page_match = preg_match($regexp, $path);
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if ($path != $_GET['q']) {
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$page_match = $page_match || preg_match($regexp, $_GET['q']);
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}
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$page_match = !($block->visibility xor $page_match);
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}
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else {
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$page_match = drupal_eval($block->pages);
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}
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}
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else {
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$page_match = TRUE;
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}
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$block->enabled = $enabled;
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$block->page_match = $page_match;
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if ($block->enabled && $block->page_match) {
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// Check the current throttle status and see if block should be displayed based on server load.
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if (!($block->throttle && (module_invoke('throttle', 'status') > 0))) {
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$array = module_invoke($block->module, 'block', 'view', $block->delta);
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if (isset($array) && is_array($array)) {
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foreach ($array as $k => $v) {
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$block->$k = $v;
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}
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}
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}
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if (isset($block->content) && $block->content) {
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// Override default block title if a custom display title is present.
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if ($block->title) {
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// Check plain here to allow module generated titles to keep any markup.
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$block->subject = $block->title == '<none>' ? '' : check_plain($block->title);
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}
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return theme('block', $block);
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}
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}
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return '';
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}
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