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MDL-27508 introducing workshop::count_submissions() and pagination support for get_submissions()

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This commit is contained in:
David Mudrak 2012-04-20 11:12:58 +02:00
parent 9326a2aa84
commit cd57f558d9
1 changed files with 40 additions and 2 deletions
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42
mod/workshop/locallib.php
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@ -494,17 +494,55 @@ class workshop {
return $DB->get_records_sql($sql, $params);
}
/**
* Returns the total number of records that would be returned by {@link self::get_submissions()}
*
* @param mixed $authorid int|array|'all' If set to [array of] integer, return submission[s] of the given user[s] only
* @param int $groupid If non-zero, return only submissions by authors in the specified group
* @return int number of records
*/
public function count_submissions($authorid='all', $groupid=0) {
global $DB;
$params = array('workshopid' => $this->id);
$sql = "SELECT COUNT(s.id)
FROM {workshop_submissions} s
JOIN {user} u ON (s.authorid = u.id)";
if ($groupid) {
$sql .= " JOIN {groups_members} gm ON (gm.userid = u.id AND gm.groupid = :groupid)";
$params['groupid'] = $groupid;
}
$sql .= " WHERE s.example = 0 AND s.workshopid = :workshopid";
if ('all' === $authorid) {
// no additional conditions
} elseif (!empty($authorid)) {
list($usql, $uparams) = $DB->get_in_or_equal($authorid, SQL_PARAMS_NAMED);
$sql .= " AND authorid $usql";
$params = array_merge($params, $uparams);
} else {
// $authorid is empty
return 0;
}
return $DB->count_records_sql($sql, $params);
}
/**
* Returns submissions from this workshop
*
* Fetches data from {workshop_submissions} and adds some useful information from other
* tables. Does not return textual fields to prevent possible memory lack issues.
*
* @see self::count_submissions()
* @param mixed $authorid int|array|'all' If set to [array of] integer, return submission[s] of the given user[s] only
* @param int $groupid If non-zero, return only submissions by authors in the specified group
* @param int $limitfrom Return a subset of records, starting at this point (optional)
* @param int $limitnum Return a subset containing this many records in total (optional, required if $limitfrom is set)
* @return array of records or an empty array
*/
public function get_submissions($authorid='all', $groupid=0) {
public function get_submissions($authorid='all', $groupid=0, $limitfrom=0, $limitnum=0) {
global $DB;
$authorfields = user_picture::fields('u', null, 'authoridx', 'author');
@ -534,7 +572,7 @@ class workshop {
}
$sql .= " ORDER BY u.lastname, u.firstname";
return $DB->get_records_sql($sql, $params);
return $DB->get_records_sql($sql, $params, $limitfrom, $limitnum);
}
/**