/**
* Populate forum id arrays.
* @throws \coding_exception
*/
protected function populate_forums()
{
local::swap_global_user($this->user->id);
// Note - we don't include the site in the list of courses. This is intentional - we want student engagement to
// be increased in courses where learning takes place and the front page is unlikely to fit that model.
// Currently we are using local::swap_global_user as a hack for the following function (MDL-51353).
$this->courses = enrol_get_my_courses();
$forums = [];
$hsuforums = [];
foreach ($this->courses as $course) {
$forums = $forums + forum_get_readable_forums($this->user->id, $course->id);
if (function_exists('hsuforum_get_readable_forums')) {
$hsuforums = $hsuforums + hsuforum_get_readable_forums($this->user->id, $course->id, true);
}
}
// Remove Q&A forums from array.
$forums = $this->purge_qa_forums($forums);
$hsuforums = $this->purge_qa_forums($hsuforums);
// Rmove forums in courses not accessed for a long time.
$forums = $this->process_stale_forums($forums);
$hsuforums = $this->process_stale_forums($hsuforums, true);
$this->forums = $forums;
$this->hsuforums = $hsuforums;
$this->forumids = array_keys($forums);
$this->forumidsallgroups = $this->forumids_accessallgroups($forums);
$this->hsuforumids = array_keys($hsuforums);
$this->hsuforumidsallgroups = $this->forumids_accessallgroups($hsuforums, 'hsuforum');
local::swap_global_user(false);
}
/**
* Returns a list of posts found using an array of search terms.
*
* @global object
* @global object
* @global object
* @param array $searchterms array of search terms, e.g. word +word -word
* @param int $courseid if 0, we search through the whole site
* @param int $limitfrom
* @param int $limitnum
* @param int &$totalcount
* @param string $extrasql
* @return array|bool Array of posts found or false
*/
function hsuforum_search_posts($searchterms, $courseid = 0, $limitfrom = 0, $limitnum = 50, &$totalcount, $extrasql = '')
{
global $CFG, $DB, $USER;
require_once $CFG->libdir . '/searchlib.php';
$forums = hsuforum_get_readable_forums($USER->id, $courseid);
if (count($forums) == 0) {
$totalcount = 0;
return false;
}
$now = round(time(), -2);
// db friendly
$fullaccess = array();
$where = array();
$params = array('privatereply1' => $USER->id, 'privatereply2' => $USER->id);
foreach ($forums as $forumid => $forum) {
$select = array();
if (!$forum->viewhiddentimedposts) {
$select[] = "(d.userid = :userid{$forumid} OR (d.timestart < :timestart{$forumid} AND (d.timeend = 0 OR d.timeend > :timeend{$forumid})))";
$params = array_merge($params, array('userid' . $forumid => $USER->id, 'timestart' . $forumid => $now, 'timeend' . $forumid => $now));
}
if ($forum->type == 'qanda' && !has_capability('mod/hsuforum:viewqandawithoutposting', $forum->context)) {
if (!empty($forum->onlydiscussions)) {
list($discussionid_sql, $discussionid_params) = $DB->get_in_or_equal($forum->onlydiscussions, SQL_PARAMS_NAMED, 'qanda' . $forumid . '_');
$params = array_merge($params, $discussionid_params);
$select[] = "(d.id {$discussionid_sql} OR p.parent = 0)";
} else {
$select[] = "p.parent = 0";
}
}
if (!empty($forum->onlygroups)) {
list($groupid_sql, $groupid_params) = $DB->get_in_or_equal($forum->onlygroups, SQL_PARAMS_NAMED, 'grps' . $forumid . '_');
$params = array_merge($params, $groupid_params);
$select[] = "d.groupid {$groupid_sql}";
}
if ($select) {
$selects = implode(" AND ", $select);
$where[] = "(d.forum = :forum{$forumid} AND {$selects})";
$params['forum' . $forumid] = $forumid;
} else {
$fullaccess[] = $forumid;
}
}
if ($fullaccess) {
list($fullid_sql, $fullid_params) = $DB->get_in_or_equal($fullaccess, SQL_PARAMS_NAMED, 'fula');
$params = array_merge($params, $fullid_params);
$where[] = "(d.forum {$fullid_sql})";
}
$selectdiscussion = "(" . implode(" OR ", $where) . ")";
$messagesearch = '';
$searchstring = '';
// Need to concat these back together for parser to work.
foreach ($searchterms as $searchterm) {
if ($searchstring != '') {
$searchstring .= ' ';
}
$searchstring .= $searchterm;
}
// We need to allow quoted strings for the search. The quotes *should* be stripped
// by the parser, but this should be examined carefully for security implications.
$searchstring = str_replace("\\\"", "\"", $searchstring);
$parser = new search_parser();
$lexer = new search_lexer($parser);
if ($lexer->parse($searchstring)) {
$parsearray = $parser->get_parsed_array();
// Experimental feature under 1.8! MDL-8830
// Use alternative text searches if defined
// This feature only works under mysql until properly implemented for other DBs
// Requires manual creation of text index for hsuforum_posts before enabling it:
// CREATE FULLTEXT INDEX foru_post_tix ON [prefix]hsuforum_posts (subject, message)
// Experimental feature under 1.8! MDL-8830
$usetextsearches = get_config('hsuforum', 'usetextsearches');
if (!empty($usetextsearches)) {
list($messagesearch, $msparams) = search_generate_text_SQL($parsearray, 'p.message', 'p.subject', 'p.userid', 'u.id', 'u.firstname', 'u.lastname', 'p.modified', 'd.forum');
} else {
list($messagesearch, $msparams) = search_generate_SQL($parsearray, 'p.message', 'p.subject', 'p.userid', 'u.id', 'u.firstname', 'u.lastname', 'p.modified', 'd.forum');
}
$params = array_merge($params, $msparams);
}
$fromsql = "{hsuforum_posts} p,\n {hsuforum_discussions} d JOIN {hsuforum} f ON f.id = d.forum,\n {user} u";
foreach ($parsearray as $item) {
if ($item->getType() == TOKEN_USER || $item->getType() == TOKEN_USERID) {
// Additional user SQL for anonymous posts.
$extrasql .= " AND ((f.anonymous != 1 OR p.userid = :currentuserid) OR p.reveal = 1) ";
$params['currentuserid'] = $USER->id;
break;
}
}
$selectsql = "(p.privatereply = 0\n OR p.privatereply = :privatereply1\n OR p.userid = :privatereply2\n )\n AND {$messagesearch}\n AND p.discussion = d.id\n AND p.userid = u.id\n AND {$selectdiscussion}\n {$extrasql}";
$countsql = "SELECT COUNT(*)\n FROM {$fromsql}\n WHERE {$selectsql}";
$allnames = get_all_user_name_fields(true, 'u');
$searchsql = "SELECT p.*,\n d.forum,\n {$allnames},\n u.email,\n u.picture,\n u.imagealt,\n u.email\n FROM {$fromsql}\n WHERE {$selectsql}\n ORDER BY p.modified DESC";
$totalcount = $DB->count_records_sql($countsql, $params);
return $DB->get_records_sql($searchsql, $params, $limitfrom, $limitnum);
}
