PhabricatorCustomFieldEditEngineExtension.php
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	<?php

	final class PhabricatorCustomFieldEditEngineExtension
	extends PhabricatorEditEngineExtension {

	const EXTENSIONKEY = 'customfield.fields';

	public function getExtensionPriority() {
	return 5000;
	}

	public function isExtensionEnabled() {
	return true;
	}

	public function getExtensionName() {
	return pht('Custom Fields');
	}

	public function supportsObject(
	PhabricatorEditEngine $engine,
	PhabricatorApplicationTransactionInterface $object) {
	return ($object instanceof PhabricatorCustomFieldInterface);
	}

	public function buildCustomEditFields(
	PhabricatorEditEngine $engine,
	PhabricatorApplicationTransactionInterface $object) {

	$viewer = $this->getViewer();

	$field_list = PhabricatorCustomField::getObjectFields(
	$object,
	PhabricatorCustomField::ROLE_EDIT);

	$field_list->setViewer($viewer);

	if ($object->getID()) {
	$field_list->readFieldsFromStorage($object);
	}

	$results = array();
	foreach ($field_list->getFields() as $field) {
	$edit_fields = $field->getEditEngineFields($engine);
	foreach ($edit_fields as $edit_field) {
	$results[] = $edit_field;
	}
	}

	return $results;
	}

	}