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chamilo-lms
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[svn r16094] Added function to get course access status for given course and user

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skala
Yannick Warnier 18 years ago
parent 0b7de49a5a
commit 008288c74d
1 changed files with 208 additions and 1 deletions
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  1. 209
      main/inc/lib/main_api.lib.php

209
main/inc/lib/main_api.lib.php
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@ -2744,4 +2744,211 @@ function api_add_setting($val,$var,$sk=null,$type='textfield',$c=null,$title='',
return $res;
}
}
?>
/**
* Returns wether a user can or can't view the contents of a course.
*
* @param int $userid User id or NULL to get it from $_SESSION
* @param int $cid Course id to check whether the user is allowed.
* @return bool
*/
function api_is_course_visible_for_user( $userid = null, $cid = null ) {
if ($userid == NULL)
$userid = $_SESSION['_user']['user_id'];
$course_table = Database::get_main_table(TABLE_MAIN_COURSE);
$course_cat_table = Database::get_main_table(TABLE_MAIN_CATEGORY);
$sql = "SELECT
$course_table.category_code,
$course_table.visibility,
$course_table.code,
$course_cat_table.code
FROM $course_table
LEFT JOIN $course_cat_table
ON $course_table.category_code = $course_cat_table.code
WHERE
$course_table.code = '$cid'
LIMIT 1";
$result = api_sql_query($sql, __FILE__, __LINE__);
if (Database::num_rows($result) > 0) {
$visibility = Database::fetch_array($result);
$visibility = $visibility[0]['visibility'];
}
if (api_get_setting('use_session_mode') != 'true') {
$course_user_table = Database::get_main_table(TABLE_MAIN_COURSE_USER);
$sql = "SELECT
tutor_id, status
FROM $course_user_table
WHERE
user_id = '$userid'
AND
course_code = '$cid'
LIMIT 1";
$result = api_sql_query($sql, __FILE__, __LINE__);
if (Database::num_rows($result) > 0) {
// this user have a recorded state for this course
$cuData = Database::fetch_array($result);
$is_courseMember = true;
$is_courseTutor = ($cuData['tutor_id' ] == 1);
$is_courseAdmin = ($cuData['status'] == 1);
} else {
// this user has no status related to this course
$is_courseMember = false;
$is_courseAdmin = false;
$is_courseTutor = false;
}
$is_courseAdmin = ($is_courseAdmin || $is_platformAdmin);
} else {
$tbl_course_user = Database :: get_main_table(TABLE_MAIN_COURSE_USER);
$sql = "SELECT
tutor_id, status, role
FROM $tbl_course_user
WHERE
user_id = '$userid'
AND
course_code = '$cid'
LIMIT 1";
$result = api_sql_query($sql, __FILE__, __LINE__);
if (Database::num_rows($result) > 0) {
// this user have a recorded state for this course
$cuData = Database::fetch_array($result);
$_courseUser['role'] = $cuData['role'];
$is_courseMember = true;
$is_courseTutor = ($cuData['tutor_id' ] == 1);
$is_courseAdmin = ($cuData['status'] == 1);
}
if (!$is_courseAdmin) {
// this user has no status related to this course
// is it the session coach or the session admin ?
$tbl_session =
Database::get_main_table(TABLE_MAIN_SESSION);
$tbl_session_course =
Database::get_main_table(TABLE_MAIN_SESSION_COURSE);
$tbl_session_course_user =
Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER);
$sql = "SELECT
session.id_coach, session_admin_id, session.id
FROM
$tbl_session as session
INNER JOIN $tbl_session_course
ON session_rel_course.id_session = session.id
AND session_rel_course.course_code = $cid
LIMIT 1";
$result = api_sql_query($sql, __FILE__, __LINE__);
$row = api_store_result($result);
if($row[0]['id_coach']==$userid) {
$_courseUser['role'] = 'Professor';
$is_courseMember = true;
$is_courseTutor = true;
$is_courseAdmin = false;
$is_courseCoach = true;
$is_sessionAdmin = false;
api_session_register('_courseUser');
} else if($row[0]['session_admin_id']==$userid) {
$_courseUser['role'] = 'Professor';
$is_courseMember = false;
$is_courseTutor = false;
$is_courseAdmin = false;
$is_courseCoach = false;
$is_sessionAdmin = true;
} else {
// Check if the current user is the course coach
$sql = "SELECT
1
FROM $tbl_session_course
WHERE
session_rel_course.course_code = $cid
AND
session_rel_course.id_coach = '$userid'
LIMIT 1";
$result = api_sql_query($sql,__FILE__,__LINE__);
if ($row = Database::fetch_array($result)) {
$_courseUser['role'] = 'Professor';
$is_courseMember = true;
$is_courseTutor = true;
$is_courseCoach = true;
$is_sessionAdmin = false;
$tbl_user = Database :: get_main_table(TABLE_MAIN_USER);
$sql = "SELECT
status
FROM $tbl_user
WHERE
user_id = $userid
LIMIT 1";
$result = api_sql_query($sql);
if (Database::result($result, 0, 0) == 1){
$is_courseAdmin = true;
} else {
$is_courseAdmin = false;
}
} else {
// Check if the user is a student is this session
$sql = "SELECT
id
FROM $tbl_session_course_user
WHERE
`id_user` = '$userid'
AND
`course_code` = '$cid'
LIMIT 1";
if (Database::num_rows($result) > 0) {
// this user have a recorded state for this course
while ($row = Database::fetch_array($result)) {
$is_courseMember = true;
$is_courseTutor = false;
$is_courseAdmin = false;
$is_sessionAdmin = false;
}
}
}
}
}
}
$is_allowed_in_course = false;
switch ($visibility) {
case COURSE_VISIBILITY_OPEN_WORLD:
$is_allowed_in_course = true;
break;
case COURSE_VISIBILITY_OPEN_PLATFORM:
if (isset($userid))
$is_allowed_in_course = true;
break;
case COURSE_VISIBILITY_REGISTERED:
case COURSE_VISIBILITY_CLOSED:
if ($is_platformAdmin || $is_courseMember || $is_courseAdmin)
$is_allowed_in_course = true;
break;
default:
$is_allowed_in_course = false;
break;
}
return $is_allowed_in_course;
}
?>
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