Drupal EntityFieldQuery group results by taxonomy - drupal

Question

I have an entity bundle called Map Points that has a taxonomy term reference field of countries. I'm using EntityFieldQuery in a custom module to list out all the map point entities but I need to group them by the country reference field.
Here is the code I have right now which filters the query by tid 1 and I know I can repeat the query for each country to group the results but I'm looking for a more refined way to group the results by the country term id's without having to write a new query for each country.
$query = new EntityFieldQuery();
$query
->entityCondition('entity_type', 'givepower')
->entityCondition('bundle', 'map_points')
->propertyCondition('type', 'map_points', '=')
->fieldCondition('field_map_point_country', 'tid', '1');
$result = $query->execute();
// set empty map point id array
$map_point_ids = array();
// loop through all givepower entities
foreach($result['givepower'] as $record) {
$map_point_ids[] = $record->id;
}
// load entities
$map_point = entity_load('givepower', $map_point_ids);
// set entity view
$entities = entity_view('givepower', $map_point);
return $entities;

Answer 1

I believe I figured this out. Here's the finished code:
//load recent_work_countries taxonomy
$vocabulary = taxonomy_vocabulary_machine_name_load('recent_work_countries');
// load all terms in the recent_work_countries taxonomy
$terms = entity_load('taxonomy_term', FALSE, array('vid' => $vocabulary->vid));
// set empty countries array
$countries = array();
// loop through each recent_work_countries term
foreach($terms as $tid => $value) {
// set country term name and term id(tid) vars
$country_name = $terms[$tid]->name;
$country_tid = $terms[$tid]->tid;
// add each country to the counties array
$countries[$country_name] = array();
// create new query to grab all map point entities with the current recent_work_countries tid
$query = new EntityFieldQuery();
$query
->entityCondition('entity_type', 'givepower')
->entityCondition('bundle', 'map_points')
->propertyCondition('type', 'map_points', '=')
->fieldCondition('field_map_point_country', 'tid', $country_tid);
$result = $query->execute();
// set empty tab id array
$map_point_ids = array();
// loop through all givepower entities that have the map_point_ids
foreach($result['givepower'] as $record) {
$map_point_ids[] = $record->id;
}
// load entities
$map_point = entity_load('givepower', $map_point_ids);
// set entity view
$entities = entity_view('givepower', $map_point);
// loop through each entities results
foreach($entities['givepower'] as $eid => $e_val) {
// add entity result data to countries array
$countries[$country_name][] = array(
'title' => $e_val['field_map_point_title']['#items'][0]['safe_value'],
'description' => $e_val['field_map_point_description']['#items'][0]['safe_value'],
'latitude' => $e_val['field_map_point_latitude']['#items'][0]['safe_value'],
'longitude' => $e_val['field_map_point_longitute']['#items'][0]['safe_value'],
);
}
}
This will create an array that looks like this:
Array (
[Kenya] => Array (
[0] => Array (
[title] => Test Map Point 1
[description] => lorum ipsum
[latitude] => 1.765404
[longitude] => 40.079880 )
[1] => Array (
[title] => Test Map Point 1
[description] => Lorum ipsum
[latitude] => 0.633657
[longitude] => 37.350050 ) )
[Haiti] => Array (
[0] => Array (
[title] => GA University
[description] => lorum ipsum
[latitude] => 18.574420
[longitude] => -72.310981 ) )
[Nepal] => Array ( )
[Ghana] => Array ( )
)