/**
* Get a cropped array of layer definitions for an exhibit.
*
* @param NeatlineExhibit $exhibit The exhibit.
* @return array The layers.
*/
function nl_getLayersForExhibit($exhibit)
{
$groups = nl_getLayers();
$subset = array();
// Explode the list of layer IDs in `spatial_layers` and merge the
// `spatial_layer` slug into the array, which ensures that at least one
// layer is included if `spatial_layers` is empty.
$ids = nl_explode($exhibit->spatial_layers);
$ids = array_merge($ids, array($exhibit->spatial_layer));
// Walk the layer groups.
foreach ($groups as $group => $layers) {
// Include the layer if it is enabled in the exhihbit.
foreach ($layers as $layer) {
if (in_array($layer['id'], $ids)) {
$subset[] = $layer;
}
}
}
return $subset;
}
/**
* `nl_getLayers` should parse the JSON in the passed file.
*/
public function testGetLayers()
{
$this->assertEquals(array('Group1' => array(array('title' => 'Layer 1', 'id' => 'Layer1', 'type' => 'Type1'), array('title' => 'Layer 2', 'id' => 'Layer2', 'type' => 'Type2')), 'Group2' => array(array('title' => 'Layer 3', 'id' => 'Layer3', 'type' => 'Type3'), array('title' => 'Layer 4', 'id' => 'Layer4', 'type' => 'Type4')), 'Group3' => array(array('title' => 'Layer 5', 'id' => 'Layer5', 'type' => 'Type5'), array('title' => 'Layer 6', 'id' => 'Layer6', 'type' => 'Type6'))), nl_getLayers());
}
