private function _expandInput($input)
{
$result = ['modules' => [], 'soils' => []];
$soilById = Soil::byId(Soil::all());
$perimeters = array_get($input, 'soils', []);
foreach ($perimeters as $poly) {
$polygon = new Polygon($poly['p']);
$soil = array_get($soilById, array_get($poly, 's', ''), new Soil());
$result['soils'][] = ['polygon' => $polygon, 'soil' => $soil];
}
return $result;
}
