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MDL-69908 user: include groups with exported course participants.

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This commit is contained in:
Paul Holden 2021-05-21 08:00:39 +01:00
parent 9533e8ddf5
commit c260bad774
3 changed files with 95 additions and 4 deletions
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32
lib/grouplib.php
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@ -1019,6 +1019,38 @@ function groups_get_members_ids_sql($groupids, context $context = null, $groupsj
return array($sql, $groupjoin->params);
}
/**
* Returns array with SQL and parameters returning userids and concatenated group names for given course
*
* This function uses 'gn[0-9]+_' prefix for table names and parameters
*
* @param int $courseid
* @param string $separator
* @return array [$sql, $params]
*/
function groups_get_names_concat_sql(int $courseid, string $separator = ', '): array {
global $DB;
// Use unique prefix just in case somebody makes some SQL magic with the result.
static $i = 0;
$i++;
$prefix = "gn{$i}_";
$groupalias = $prefix . 'g';
$groupmemberalias = $prefix . 'gm';
$groupcourseparam = $prefix . 'courseid';
$sqlgroupconcat = $DB->sql_group_concat("{$groupalias}.name", $separator, "{$groupalias}.name");
$sql = "SELECT {$groupmemberalias}.userid, {$sqlgroupconcat} AS groupnames
FROM {groups} {$groupalias}
JOIN {groups_members} {$groupmemberalias} ON {$groupmemberalias}.groupid = {$groupalias}.id
WHERE {$groupalias}.courseid = :{$groupcourseparam}
GROUP BY {$groupmemberalias}.userid";
return [$sql, [$groupcourseparam => $courseid]];
};
/**
* Get sql join to return users in a group
*