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phab/src/infrastructure/customfield/query/PhabricatorCustomFieldStorageQuery.php
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PhabricatorCustomFieldStorageQuery.php
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<?php
/**
* Load custom field data from storage.
*
* This query loads the data directly into the field objects and does not
* return it to the caller. It can bulk load data for any list of fields,
* even if they have different objects or object types.
*/
final class PhabricatorCustomFieldStorageQuery extends Phobject {
private $fieldMap = array();
private $storageSources = array();
public function addFields(array $fields) {
assert_instances_of($fields, 'PhabricatorCustomField');
foreach ($fields as $field) {
$this->addField($field);
}
return $this;
}
public function addField(PhabricatorCustomField $field) {
$role_storage = PhabricatorCustomField::ROLE_STORAGE;
if (!$field->shouldEnableForRole($role_storage)) {
return $this;
}
$storage = $field->newStorageObject();
$source_key = $storage->getStorageSourceKey();
$this->fieldMap[$source_key][] = $field;
if (empty($this->storageSources[$source_key])) {
$this->storageSources[$source_key] = $storage;
}
return $this;
}
public function execute() {
foreach ($this->storageSources as $source_key => $storage) {
$fields = idx($this->fieldMap, $source_key, array());
$this->loadFieldsFromStorage($storage, $fields);
}
}
private function loadFieldsFromStorage($storage, array $fields) {
// Only try to load fields which have a persisted object.
$loadable = array();
foreach ($fields as $key => $field) {
$object = $field->getObject();
$phid = $object->getPHID();
if (!$phid) {
continue;
}
$loadable[$key] = $field;
}
if ($loadable) {
$data = $storage->loadStorageSourceData($loadable);
} else {
$data = array();
}
foreach ($fields as $key => $field) {
if (array_key_exists($key, $data)) {
$value = $data[$key];
$field->setValueFromStorage($value);
$field->didSetValueFromStorage();
} else if (isset($loadable[$key])) {
// NOTE: We set this only if the object exists. Otherwise, we allow
// the field to retain any default value it may have.
$field->setValueFromStorage(null);
$field->didSetValueFromStorage();
}
}
}
}
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