/**
* @param $amount - how many locations to pick
* @param $exclude - array of locations to exclude
* @return mixed
*/
public static function pickUnused($amount, $exclude = [])
{
$used = array_keys(Location::has('targets')->get()->keyBy('id')->toArray());
foreach ($exclude as $location) {
$used[] = $location->id;
}
$available = Location::whereNotIn('id', $used)->get();
$locations = $available->random($amount);
return $locations;
}
/**
* Show the form for creating a new resource.
*
* @return \Illuminate\Http\Response
*/
public function create()
{
$total = Location::all()->count();
$used = Location::has('targets')->count();
$free = $total - $used;
if ($free < 5) {
return redirect('/locations');
}
$location = Location::pickUnused(1);
return view('experiments.create', compact('location', 'free'));
}
/**
* @param $id
* @param bool $withUsers
* @return mixed
* @throws GeneralException
*/
public function findOrThrowException($id, $hasPcode = false)
{
if (empty($id)) {
throw new GeneralException("Location id is empty.");
}
if ($hasPcode) {
$location = Location::has('pcode')->find($id);
} else {
$location = Location::find($id);
}
if (!is_null($location)) {
return $location;
}
throw new GeneralException("That location with id {$id} does not exist.");
}