function check_table_format($student_id, $json_string, $map_id = null)
{
$json_arr = json_decode($json_string, TRUE);
if (empty($json_arr['id']) && empty($map_id)) {
$maps = get_list_of_maps($student_id);
$list = array();
foreach ($maps as $map) {
$id = $map['id'];
$list[$id] = $id;
}
$id = 1;
while (!empty($list[$id])) {
$id++;
}
} else {
$id = $map_id;
}
$must_attributes = array('title' => null, 'id' => $id, 'concepts' => [], 'relationships' => []);
if (!empty($json_arr)) {
foreach ($must_attributes as $key => $value) {
if (!empty($json_arr[$key])) {
$must_attributes[$key] = $json_arr[$key];
}
}
$result = json_encode($must_attributes);
return $result;
} else {
return null;
}
}
function does_map_exist_by_title($student_id, $title)
{
$list = get_list_of_maps($student_id);
foreach ($list as $map) {
foreach ($map as $key => $value) {
if ($value == $title) {
return true;
}
}
}
return false;
}
deliver_response(405, "Request Method Not Allowed.");
} else {
if (does_student_exist($student_id)) {
switch ($request_method) {
case "GET":
if ($map_id != null) {
if (!does_map_exist_by_id($student_id, $map_id)) {
deliver_response(200, "Map with id={$map_id} does not exist");
break;
}
$map = get_user_maps($student_id, $map_id);
$map = xml_maps_to_json($map);
$map = json_decode($map, true);
deliver_response(200, "Map retrieving successful", $map[0]);
} else {
$maps = get_list_of_maps($student_id);
if (empty($maps)) {
deliver_response(200, "Maps were not found");
} else {
deliver_response(200, "All Maps retrieved successful", $maps, "mapsList");
}
}
break;
case "POST":
$json_arr = json_decode($json_string, true);
if (is_array($json_arr)) {
$title = $json_arr['title'];
$map_id = $json_arr['id'];
if (does_map_exist_by_title($student_id, $title)) {
deliver_response(200, "Map with title '{$title}' already exists");
break;