mirror of
https://github.com/moodle/moodle.git
synced 2025-06-04 07:06:45 +02:00
feaf5d06db
- changed file upload api in formslib - fixed blog attachments and related code in file.php - fixed glossary attachments - fixed embedded images in forum posts and blogs - only gif, png and jpeg; the problme was that svg were embedded using img tag which was wrong, the same applied to other picture formats unsupported by browsers (please note that student submitted svg should be never embedded in moodle page for security reasons) - other minor fixes
652 lines
23 KiB
PHP
Executable File
652 lines
23 KiB
PHP
Executable File
<?php //$Id$
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/**
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* Library of functions and constants for blog
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*/
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require_once($CFG->libdir .'/blocklib.php');
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require_once($CFG->libdir .'/pagelib.php');
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require_once($CFG->dirroot .'/blog/rsslib.php');
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require_once($CFG->dirroot .'/blog/blogpage.php');
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/**
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* Definition of blogcourse page type (blog page with course id present).
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*/
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//not used at the moment, and may not need to be
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define('PAGE_BLOG_COURSE_VIEW', 'blog_course-view');
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/**
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* Checks to see if user has visited blogpages before, if not, install 2
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* default blocks (blog_menu and blog_tags).
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*/
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function blog_check_and_install_blocks() {
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global $USER;
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if (isloggedin() && !isguest()) {
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// if this user has not visited this page before
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if (!get_user_preferences('blogpagesize')) {
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// find the correct ids for blog_menu and blog_from blocks
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$menublock = get_record('block','name','blog_menu');
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$tagsblock = get_record('block','name','blog_tags');
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// add those 2 into block_instance page
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// add blog_menu block
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$newblock = new object();
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$newblock -> blockid = $menublock->id;
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$newblock -> pageid = $USER->id;
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$newblock -> pagetype = 'blog-view';
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$newblock -> position = 'r';
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$newblock -> weight = 0;
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$newblock -> visible = 1;
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insert_record('block_instance', $newblock);
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// add blog_tags menu
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$newblock -> blockid = $tagsblock->id;
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$newblock -> weight = 1;
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insert_record('block_instance', $newblock);
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// finally we set the page size pref
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set_user_preference('blogpagesize', 10);
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}
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}
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}
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/**
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* Adaptation of isediting in moodlelib.php for blog module
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* @return bool
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*/
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function blog_isediting() {
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global $SESSION;
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return !empty($SESSION->blog_editing_enabled);
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}
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/**
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* This function is in lib and not in BlogInfo because entries being searched
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* might be found in any number of blogs rather than just one.
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*
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* $@param ...
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*/
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function blog_print_html_formatted_entries($postid, $filtertype, $filterselect, $tagid, $tag) {
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global $CFG, $USER;
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$blogpage = optional_param('blogpage', 0, PARAM_INT);
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$bloglimit = optional_param('limit', get_user_preferences('blogpagesize', 10), PARAM_INT);
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$start = $blogpage * $bloglimit;
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$sitecontext = get_context_instance(CONTEXT_SYSTEM, SITEID);
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$morelink = '<br /> ';
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$totalentries = get_viewable_entry_count($postid, $bloglimit, $start, $filtertype, $filterselect, $tagid, $tag, $sort='lastmodified DESC');
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$blogEntries = fetch_entries($postid, $bloglimit, $start, $filtertype, $filterselect, $tagid, $tag, $sort='lastmodified DESC', true);
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print_paging_bar($totalentries, $blogpage, $bloglimit, get_baseurl($filtertype, $filterselect), 'blogpage');
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if ($CFG->enablerssfeeds) {
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blog_rss_print_link($filtertype, $filterselect, $tag);
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}
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if (has_capability('moodle/blog:create', $sitecontext)) {
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//the user's blog is enabled and they are viewing their own blog
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$addlink = '<div align="center">';
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$addlink .= '<a href="'.$CFG->wwwroot .'/blog/edit.php?action=add'.'">'. get_string('addnewentry', 'blog').'</a>';
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$addlink .= '</div>';
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echo $addlink;
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}
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if ($blogEntries) {
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$count = 0;
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foreach ($blogEntries as $blogEntry) {
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blog_print_entry($blogEntry, 'list', $filtertype, $filterselect); //print this entry.
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$count++;
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}
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print_paging_bar($totalentries, $blogpage, $bloglimit, get_baseurl($filtertype, $filterselect), 'blogpage');
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if (!$count) {
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print '<br /><center>'. get_string('noentriesyet', 'blog') .'</center><br />';
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}
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print $morelink.'<br />'."\n";
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return;
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}
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$output = '<br /><center>'. get_string('noentriesyet', 'blog') .'</center><br />';
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print $output;
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}
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/**
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* This function is in lib and not in BlogInfo because entries being searched
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* might be found in any number of blogs rather than just one.
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*
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* This function builds an array which can be used by the included
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* template file, making predefined and nicely formatted variables available
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* to the template. Template creators will not need to become intimate
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* with the internal objects and vars of moodle blog nor will they need to worry
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* about properly formatting their data
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*
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* @param BlogEntry blogEntry - a hopefully fully populated BlogEntry object
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* @param string viewtype Default is 'full'. If 'full' then display this blog entry
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* in its complete form (eg. archive page). If anything other than 'full'
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* display the entry in its abbreviated format (eg. index page)
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*/
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function blog_print_entry($blogEntry, $viewtype='full', $filtertype='', $filterselect='', $mode='loud') {
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global $USER, $CFG, $COURSE, $ME;
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$template['body'] = format_text($blogEntry->summary, $blogEntry->format);
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$template['title'] = '<a name="'. $blogEntry->subject .'"></a>';
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//enclose the title in nolink tags so that moodle formatting doesn't autolink the text
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$template['title'] .= '<span class="nolink">'.$blogEntry->subject.'</span>';
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$template['userid'] = $blogEntry->userid;
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$template['author'] = fullname(get_record('user','id',$blogEntry->userid));
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$template['lastmod'] = userdate($blogEntry->lastmodified);
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$template['created'] = userdate($blogEntry->created);
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$template['publishstate'] = $blogEntry->publishstate;
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/// preventing user to browse blogs that they aren't supposed to see
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/// This might not be too good since there are multiple calls per page
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/*
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if (!blog_user_can_view_user_post($template['userid'])) {
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error ('you can not view this post');
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}*/
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$stredit = get_string('edit');
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$strdelete = get_string('delete');
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$user = get_record('user','id',$template['userid']);
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/// Start printing of the blog
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echo '<table cellspacing="0" class="forumpost blogpost blog'.$template['publishstate'].'" width="100%">';
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echo '<tr class="header"><td class="picture left">';
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print_user_picture($template['userid'], SITEID, $user->picture);
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echo '</td>';
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echo '<td class="topic starter"><div class="subject">'.$template['title'].'</div><div class="author">';
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$fullname = fullname($user, $template['userid']);
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$by = new object();
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$by->name = '<a href="'.$CFG->wwwroot.'/user/view.php?id='.
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$user->id.'&course='.$COURSE->id.'">'.$fullname.'</a>';
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$by->date = $template['lastmod'];
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print_string('bynameondate', 'forum', $by);
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echo '</div></td></tr>';
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echo '<tr><td class="left side">';
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/// Actual content
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echo '</td><td class="content">'."\n";
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if ($blogEntry->attachment) {
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echo '<div class="attachments">';
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$attachedimages = blog_print_attachments($blogEntry);
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echo '</div>';
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} else {
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$attachedimages = '';
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}
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switch ($template['publishstate']) {
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case 'draft':
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$blogtype = get_string('publishtonoone', 'blog');
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break;
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case 'site':
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$blogtype = get_string('publishtosite', 'blog');
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break;
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case 'public':
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$blogtype = get_string('publishtoworld', 'blog');
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break;
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default:
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$blogtype = '';
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break;
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}
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echo '<div class="audience">'.$blogtype.'</div>';
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// Print whole message
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echo format_text($template['body']);
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/// Print attachments
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echo $attachedimages;
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/// Links to tags
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if ($blogtags = get_records_sql('SELECT t.* FROM '.$CFG->prefix.'tags t, '.$CFG->prefix.'blog_tag_instance ti
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WHERE t.id = ti.tagid
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AND ti.entryid = '.$blogEntry->id)) {
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echo '<div class="tags">';
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if ($blogtags) {
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print_string('tags');
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echo ': ';
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foreach ($blogtags as $key => $blogtag) {
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$taglist[] = '<a href="index.php?filtertype='.$filtertype.'&filterselect='.$filterselect.'&tagid='.$blogtag->id.'">'.$blogtag->text.'</a>';
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}
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echo implode(', ', $taglist);
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}
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echo '</div>';
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}
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/// Commands
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echo '<div class="commands">';
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if (blog_user_can_edit_post($blogEntry)) {
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echo '<a href="'.$CFG->wwwroot.'/blog/edit.php?action=edit&id='.$blogEntry->id.'">'.$stredit.'</a>';
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echo '| <a href="'.$CFG->wwwroot.'/blog/edit.php?action=delete&id='.$blogEntry->id.'">'.$strdelete.'</a>';
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}
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echo '</div>';
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echo '</td></tr></table>'."\n\n";
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}
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function blog_file_area_name($blogentry) {
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// Creates a directory file name, suitable for make_upload_directory()
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global $CFG;
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// $CFG->dataroot/blog/attachments/xxxx/file.jpg
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return "blog/attachments/$blogentry->id";
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}
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function blog_file_area($blogentry) {
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return make_upload_directory( blog_file_area_name($blogentry) );
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}
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function blog_print_attachments($blogentry, $return=NULL) {
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// if return=html, then return a html string.
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// if return=text, then return a text-only string.
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// otherwise, print HTML for non-images, and return image HTML
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global $CFG;
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$filearea = blog_file_area_name($blogentry);
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$imagereturn = "";
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$output = "";
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if ($basedir = blog_file_area($blogentry)) {
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if ($files = get_directory_list($basedir)) {
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$strattachment = get_string("attachment", "forum");
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foreach ($files as $file) {
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include_once($CFG->libdir.'/filelib.php');
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$icon = mimeinfo("icon", $file);
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$type = mimeinfo("type", $file);
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if ($CFG->slasharguments) {
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$ffurl = "$CFG->wwwroot/file.php/$filearea/$file";
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} else {
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$ffurl = "$CFG->wwwroot/file.php?file=/$filearea/$file";
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}
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$image = "<img border=\"0\" src=\"$CFG->pixpath/f/$icon\" height=\"16\" width=\"16\" alt=\"\" />";
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if ($return == "html") {
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$output .= "<a href=\"$ffurl\">$image</a> ";
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$output .= "<a href=\"$ffurl\">$file</a><br />";
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} else if ($return == "text") {
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$output .= "$strattachment $file:\n$ffurl\n";
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} else {
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if (in_array($type, array('image/gif', 'image/jpeg', 'image/png'))) { // Image attachments don't get printed as links
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$imagereturn .= "<br /><img src=\"$ffurl\" alt=\"\" />";
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} else {
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echo "<a href=\"$ffurl\">$image</a> ";
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echo filter_text("<a href=\"$ffurl\">$file</a><br />");
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}
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}
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}
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}
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}
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if ($return) {
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return $output;
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}
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return $imagereturn;
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}
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/**
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* Use this function to retrieve a list of publish states available for
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* the currently logged in user.
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*
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* @return array This function returns an array ideal for sending to moodles'
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* choose_from_menu function.
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*/
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function blog_applicable_publish_states($courseid='') {
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global $CFG;
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// everyone gets draft access
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if ($CFG->bloglevel >= BLOG_USER_LEVEL) {
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$options = array ( 'draft' => get_string('publishtonoone', 'blog') );
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}
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if ($CFG->bloglevel > BLOG_USER_LEVEL) {
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$options['site'] = get_string('publishtosite', 'blog');
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}
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if ($CFG->bloglevel >= BLOG_GLOBAL_LEVEL) {
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$options['public'] = get_string('publishtoworld', 'blog');
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}
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return $options;
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}
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/**
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* User can edit a blog entry if this is their own blog post and they have
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* the capability moodle/blog:create, or if they have the capability
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* moodle/blog:manageentries.
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*
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* This also applies to deleting of posts.
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*/
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function blog_user_can_edit_post($blogEntry) {
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global $CFG, $USER;
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$sitecontext = get_context_instance(CONTEXT_SYSTEM, SITEID);
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if (has_capability('moodle/blog:manageentries', $sitecontext)) {
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return true; // can edit any blog post
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}
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if ($blogEntry->userid == $USER->id
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and has_capability('moodle/blog:create', $sitecontext)) {
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return true; // can edit own when having blog:create capability
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}
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return false;
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}
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/**
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* Checks to see if a user can view the blogs of another user.
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* Only blog level is checked here, the capabilities are enforced
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* in blog/index.php
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*/
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function blog_user_can_view_user_post($targetuserid, $blogEntry=null) {
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global $CFG, $USER;
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if (empty($CFG->bloglevel)) {
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return false; // blog system disabled
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}
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if (!empty($USER->id) and $USER->id == $targetuserid) {
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return true; // can view own posts in any case
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}
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$sitecontext = get_context_instance(CONTEXT_SYSTEM, SITEID);
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if (has_capability('moodle/blog:manageentries', $sitecontext)) {
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return true; // can manage all posts
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}
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if ($blogEntry and $blogEntry->publishstate == 'draft') {
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return false; // can not view draft of others
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}
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switch ($CFG->bloglevel) {
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case BLOG_GLOBAL_LEVEL:
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return true;
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break;
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case BLOG_SITE_LEVEL:
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if (!empty($USER->id)) { // not logged in viewers forbidden
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return true;
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}
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return false;
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break;
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case BLOG_COURSE_LEVEL:
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$mycourses = array_keys(get_my_courses($targetuserid));
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$usercourses = array_keys(get_my_courses($targetuserid));
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$shared = array_intersect($mycourses, $usercourses);
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if (!empty($shared)) {
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return true;
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}
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return false;
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break;
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case BLOG_GROUP_LEVEL:
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$mycourses = array_keys(get_my_courses($targetuserid));
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$usercourses = array_keys(get_my_courses($targetuserid));
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$shared = array_intersect($mycourses, $usercourses);
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foreach ($shared as $courseid) {
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$coursecontext = get_context_instance(CONTEXT_COURSE, $courseid);
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if (has_capability('moodle/site:accessallgroups', $coursecontext)
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or groupmode($courseid) != SEPARATEGROUPS) {
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return true;
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} else {
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if ($usergroups = user_group($courseid, $targetuserid)) {
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foreach ($usergroups as $usergroup) {
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if (ismember($usergroup->id)) {
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return true;
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}
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}
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}
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}
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}
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return false;
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break;
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case BLOG_USER_LEVEL:
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default:
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$personalcontext = get_context_instance(CONTEXT_USER, $targetuserid);
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return has_capability('moodle/user:readuserblogs', $personalcontext);
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break;
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}
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}
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/**
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* Main filter function.
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*/
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function fetch_entries($postid='', $fetchlimit=10, $fetchstart='', $filtertype='', $filterselect='', $tagid='', $tag ='', $sort='lastmodified DESC', $limit=true) {
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global $CFG, $USER;
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/// set the tag id for searching
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if ($tagid) {
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$tag = $tagid;
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} else if ($tag) {
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if ($tagrec = get_record_sql('SELECT * FROM '.$CFG->prefix.'tags WHERE text LIKE "'.$tag.'"')) {
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$tag = $tagrec->id;
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} else {
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$tag = -1; //no records found
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}
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}
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// If we have specified an ID
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// Just return 1 entry
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if ($postid) {
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if ($post = get_record('post', 'id', $postid)) {
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if (blog_user_can_view_user_post($post->userid)) {
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if ($user = get_record('user', 'id', $post->userid)) {
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$post->email = $user->email;
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$post->firstname = $user->firstname;
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$post->lastname = $user->lastname;
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}
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$retarray[] = $post;
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return $retarray;
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} else {
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return null;
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}
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} else { // bad postid
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return null;
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}
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}
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if ($tag) {
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$tagtablesql = $CFG->prefix.'blog_tag_instance bt, ';
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$tagquerysql = ' AND bt.entryid = p.id AND bt.tagid = '.$tag.' ';
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} else {
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$tagtablesql = '';
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$tagquerysql = '';
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}
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if (isloggedin()) {
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$permissionsql = '(p.publishstate = \'site\' OR p.publishstate = \'public\' OR p.userid = '.$USER->id.')';
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} else {
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$permissionsql = 'p.publishstate = \'public\'';
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}
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/****************************************
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* depending on the type, there are 4 *
|
|
* different possible sqls *
|
|
****************************************/
|
|
|
|
$requiredfields = 'p.*, u.firstname,u.lastname,u.email';
|
|
|
|
if ($filtertype == 'course' && $filterselect == SITEID) { // Really a site
|
|
$filtertype = 'site';
|
|
}
|
|
|
|
switch ($filtertype) {
|
|
|
|
case 'site':
|
|
|
|
$SQL = 'SELECT '.$requiredfields.' FROM '.$CFG->prefix.'post p, '.$tagtablesql
|
|
.$CFG->prefix.'user u
|
|
WHERE p.userid = u.id '.$tagquerysql.'
|
|
AND u.deleted = 0
|
|
AND '.$permissionsql;
|
|
|
|
break;
|
|
|
|
case 'course':
|
|
// all users with a role assigned
|
|
$context = get_context_instance(CONTEXT_COURSE, $filterselect);
|
|
|
|
$SQL = 'SELECT '.$requiredfields.' FROM '.$CFG->prefix.'post p, '.$tagtablesql
|
|
.$CFG->prefix.'role_assignments ra, '.$CFG->prefix.'user u
|
|
WHERE p.userid = ra.userid '.$tagquerysql.'
|
|
AND ra.contextid '.get_related_contexts_string($context).'
|
|
AND u.id = p.userid
|
|
AND u.deleted = 0
|
|
AND '.$permissionsql;
|
|
|
|
break;
|
|
|
|
case 'group':
|
|
|
|
$SQL = 'SELECT '.$requiredfields.' FROM '.$CFG->prefix.'post p, '.$tagtablesql
|
|
.$CFG->prefix.'groups_members m, '.$CFG->prefix.'user u
|
|
WHERE p.userid = m.userid '.$tagquerysql.'
|
|
AND u.id = p.userid
|
|
AND m.groupid = '.$filterselect.'
|
|
AND u.deleted = 0
|
|
AND '.$permissionsql;
|
|
|
|
break;
|
|
|
|
case 'user':
|
|
|
|
$SQL = 'SELECT '.$requiredfields.' FROM '.$CFG->prefix.'post p, '.$tagtablesql
|
|
.$CFG->prefix.'user u
|
|
WHERE p.userid = u.id '.$tagquerysql.'
|
|
AND u.id = '.$filterselect.'
|
|
AND u.deleted = 0
|
|
AND '.$permissionsql;
|
|
break;
|
|
}
|
|
|
|
$limitfrom = 0;
|
|
$limitnum = 0;
|
|
|
|
if ($fetchstart !== '' && $limit) {
|
|
$limitfrom = $fetchstart;
|
|
$limitnum = $fetchlimit;
|
|
}
|
|
|
|
$orderby = ' ORDER BY '. $sort .' ';
|
|
|
|
//global $db; $db->debug = true;
|
|
$records = get_records_sql($SQL . $orderby, $limitfrom, $limitnum);
|
|
//$db->debug = false;
|
|
|
|
if (empty($records)) {
|
|
return array();
|
|
}
|
|
|
|
return $records;
|
|
}
|
|
|
|
|
|
/**
|
|
* get the count of viewable entries, easiest way is to count fetch_entries
|
|
* this is used for print_paging_bar
|
|
* this is not ideal, but because of the UNION in the sql in fetch_entries,
|
|
* it is hard to use count_records_sql
|
|
*/
|
|
function get_viewable_entry_count($postid='', $fetchlimit=10,
|
|
$fetchstart='', $filtertype='', $filterselect='', $tagid='',
|
|
$tag ='', $sort='lastmodified DESC') {
|
|
|
|
$blogEntries = fetch_entries($postid, $fetchlimit,
|
|
$fetchstart, $filtertype, $filterselect, $tagid, $tag,
|
|
$sort='lastmodified DESC', false);
|
|
|
|
return count($blogEntries);
|
|
}
|
|
|
|
|
|
/// Find the base url from $_GET variables, for print_paging_bar
|
|
function get_baseurl($filtertype, $filterselect) {
|
|
|
|
$getcopy = $_GET;
|
|
|
|
unset($getcopy['blogpage']);
|
|
|
|
$strippedurl = strip_querystring(qualified_me());
|
|
if(!empty($getcopy)) {
|
|
$first = false;
|
|
$querystring = '';
|
|
foreach($getcopy as $var => $val) {
|
|
if(!$first) {
|
|
$first = true;
|
|
if ($var != 'filterselect' && $var != 'filtertype') {
|
|
$querystring .= '?'.$var.'='.$val;
|
|
$hasparam = true;
|
|
} else {
|
|
$querystring .= '?';
|
|
}
|
|
} else {
|
|
if ($var != 'filterselect' && $var != 'filtertype') {
|
|
$querystring .= '&'.$var.'='.$val;
|
|
$hasparam = true;
|
|
}
|
|
}
|
|
}
|
|
if (isset($hasparam)) {
|
|
$querystring .= '&';
|
|
} else {
|
|
$querystring = '?';
|
|
}
|
|
} else {
|
|
$querystring = '?';
|
|
}
|
|
|
|
return strip_querystring(qualified_me()) . $querystring. 'filtertype='.
|
|
$filtertype.'&filterselect='.$filterselect.'&';
|
|
|
|
}
|
|
?>
|