drupal-civicrm/sites/all/modules/civicrm/Civi/API/Provider/MagicFunctionProvider.php
2018-01-14 13:10:16 +00:00

305 lines
11 KiB
PHP

<?php
/*
+--------------------------------------------------------------------+
| CiviCRM version 4.7 |
+--------------------------------------------------------------------+
| Copyright CiviCRM LLC (c) 2004-2017 |
+--------------------------------------------------------------------+
| This file is a part of CiviCRM. |
| |
| CiviCRM is free software; you can copy, modify, and distribute it |
| under the terms of the GNU Affero General Public License |
| Version 3, 19 November 2007 and the CiviCRM Licensing Exception. |
| |
| CiviCRM is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| See the GNU Affero General Public License for more details. |
| |
| You should have received a copy of the GNU Affero General Public |
| License and the CiviCRM Licensing Exception along |
| with this program; if not, contact CiviCRM LLC |
| at info[AT]civicrm[DOT]org. If you have questions about the |
| GNU Affero General Public License or the licensing of CiviCRM, |
| see the CiviCRM license FAQ at http://civicrm.org/licensing |
+--------------------------------------------------------------------+
*/
namespace Civi\API\Provider;
use Civi\API\Events;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
/**
* This class manages the loading of API's using strict file+function naming
* conventions.
*/
class MagicFunctionProvider implements EventSubscriberInterface, ProviderInterface {
/**
* @return array
*/
public static function getSubscribedEvents() {
return array(
Events::RESOLVE => array(
array('onApiResolve', Events::W_MIDDLE),
),
);
}
/**
* @var array (string $cachekey => array('function' => string, 'is_generic' => bool))
*/
private $cache;
/**
*/
public function __construct() {
$this->cache = array();
}
/**
* @param \Civi\API\Event\ResolveEvent $event
* API resolution event.
*/
public function onApiResolve(\Civi\API\Event\ResolveEvent $event) {
$apiRequest = $event->getApiRequest();
$resolved = $this->resolve($apiRequest);
if ($resolved['function']) {
$apiRequest += $resolved;
$event->setApiRequest($apiRequest);
$event->setApiProvider($this);
$event->stopPropagation();
}
}
/**
* @inheritDoc
* @param array $apiRequest
* @return array
*/
public function invoke($apiRequest) {
$function = $apiRequest['function'];
if ($apiRequest['function'] && $apiRequest['is_generic']) {
// Unlike normal API implementations, generic implementations require explicit
// knowledge of the entity and action (as well as $params). Bundle up these bits
// into a convenient data structure.
$result = $function($apiRequest);
}
elseif ($apiRequest['function'] && !$apiRequest['is_generic']) {
$result = $function($apiRequest['params']);
}
return $result;
}
/**
* @inheritDoc
* @param int $version
* @return array
*/
public function getEntityNames($version) {
$entities = array();
$include_dirs = array_unique(explode(PATH_SEPARATOR, get_include_path()));
#$include_dirs = array(dirname(__FILE__). '/../../');
foreach ($include_dirs as $include_dir) {
$api_dir = implode(DIRECTORY_SEPARATOR,
array($include_dir, 'api', 'v' . $version));
if (!is_dir($api_dir)) {
continue;
}
$iterator = new \DirectoryIterator($api_dir);
foreach ($iterator as $fileinfo) {
$file = $fileinfo->getFilename();
// Check for entities with a master file ("api/v3/MyEntity.php")
$parts = explode(".", $file);
if (end($parts) == "php" && $file != "utils.php" && !preg_match('/Tests?.php$/', $file)) {
// without the ".php"
$entities[] = substr($file, 0, -4);
}
// Check for entities with standalone action files (eg "api/v3/MyEntity/MyAction.php").
$action_dir = $api_dir . DIRECTORY_SEPARATOR . $file;
if (preg_match('/^[A-Z][A-Za-z0-9]*$/', $file) && is_dir($action_dir)) {
if (count(glob("$action_dir/[A-Z]*.php")) > 0) {
$entities[] = $file;
}
}
}
}
$entities = array_diff($entities, array('Generic'));
$entities = array_unique($entities);
sort($entities);
return $entities;
}
/**
* @inheritDoc
* @param int $version
* @param string $entity
* @return array
*/
public function getActionNames($version, $entity) {
$entity = _civicrm_api_get_camel_name($entity);
$entities = $this->getEntityNames($version);
if (!in_array($entity, $entities)) {
return array();
}
$this->loadEntity($entity, $version);
$functions = get_defined_functions();
$actions = array();
$prefix = 'civicrm_api' . $version . '_' . _civicrm_api_get_entity_name_from_camel($entity) . '_';
$prefixGeneric = 'civicrm_api' . $version . '_generic_';
foreach ($functions['user'] as $fct) {
if (strpos($fct, $prefix) === 0) {
$actions[] = substr($fct, strlen($prefix));
}
elseif (strpos($fct, $prefixGeneric) === 0) {
$actions[] = substr($fct, strlen($prefixGeneric));
}
}
return $actions;
}
/**
* Look up the implementation for a given API request.
*
* @param array $apiRequest
* Array with keys:
* - entity: string, required.
* - action: string, required.
* - params: array.
* - version: scalar, required.
*
* @return array
* Array with keys:
* - function: callback (mixed)
* - is_generic: boolean
*/
protected function resolve($apiRequest) {
$cachekey = strtolower($apiRequest['entity']) . ':' . strtolower($apiRequest['action']) . ':' . $apiRequest['version'];
if (isset($this->cache[$cachekey])) {
return $this->cache[$cachekey];
}
$camelName = _civicrm_api_get_camel_name($apiRequest['entity'], $apiRequest['version']);
$actionCamelName = _civicrm_api_get_camel_name($apiRequest['action']);
// Determine if there is an entity-specific implementation of the action
$stdFunction = $this->getFunctionName($apiRequest['entity'], $apiRequest['action'], $apiRequest['version']);
if (function_exists($stdFunction)) {
// someone already loaded the appropriate file
// FIXME: This has the affect of masking bugs in load order; this is
// included to provide bug-compatibility.
$this->cache[$cachekey] = array('function' => $stdFunction, 'is_generic' => FALSE);
return $this->cache[$cachekey];
}
$stdFiles = array(
// By convention, the $camelName.php is more likely to contain the
// function, so test it first
'api/v' . $apiRequest['version'] . '/' . $camelName . '.php',
'api/v' . $apiRequest['version'] . '/' . $camelName . '/' . $actionCamelName . '.php',
);
foreach ($stdFiles as $stdFile) {
if (\CRM_Utils_File::isIncludable($stdFile)) {
require_once $stdFile;
if (function_exists($stdFunction)) {
$this->cache[$cachekey] = array('function' => $stdFunction, 'is_generic' => FALSE);
return $this->cache[$cachekey];
}
}
}
// Determine if there is a generic implementation of the action
require_once 'api/v3/Generic.php';
# $genericFunction = 'civicrm_api3_generic_' . $apiRequest['action'];
$genericFunction = $this->getFunctionName('generic', $apiRequest['action'], $apiRequest['version']);
$genericFiles = array(
// By convention, the Generic.php is more likely to contain the
// function, so test it first
'api/v' . $apiRequest['version'] . '/Generic.php',
'api/v' . $apiRequest['version'] . '/Generic/' . $actionCamelName . '.php',
);
foreach ($genericFiles as $genericFile) {
if (\CRM_Utils_File::isIncludable($genericFile)) {
require_once $genericFile;
if (function_exists($genericFunction)) {
$this->cache[$cachekey] = array('function' => $genericFunction, 'is_generic' => TRUE);
return $this->cache[$cachekey];
}
}
}
$this->cache[$cachekey] = array('function' => FALSE, 'is_generic' => FALSE);
return $this->cache[$cachekey];
}
/**
* Determine the function name for a given API request.
*
* @param string $entity
* API entity name.
* @param string $action
* API action name.
* @param int $version
* API version.
*
* @return string
*/
protected function getFunctionName($entity, $action, $version) {
$entity = _civicrm_api_get_entity_name_from_camel($entity);
return 'civicrm_api' . $version . '_' . $entity . '_' . $action;
}
/**
* Load/require all files related to an entity.
*
* This should not normally be called because it's does a file-system scan; it's
* only appropriate when introspection is really required (eg for "getActions").
*
* @param string $entity
* API entity name.
* @param int $version
* API version.
*/
protected function loadEntity($entity, $version) {
$camelName = _civicrm_api_get_camel_name($entity, $version);
// Check for master entity file; to match _civicrm_api_resolve(), only load the first one
$stdFile = 'api/v' . $version . '/' . $camelName . '.php';
if (\CRM_Utils_File::isIncludable($stdFile)) {
require_once $stdFile;
}
// Check for standalone action files; to match _civicrm_api_resolve(), only load the first one
$loaded_files = array(); // array($relativeFilePath => TRUE)
$include_dirs = array_unique(explode(PATH_SEPARATOR, get_include_path()));
foreach ($include_dirs as $include_dir) {
foreach (array($camelName, 'Generic') as $name) {
$action_dir = implode(DIRECTORY_SEPARATOR,
array($include_dir, 'api', "v${version}", $name));
if (!is_dir($action_dir)) {
continue;
}
$iterator = new \DirectoryIterator($action_dir);
foreach ($iterator as $fileinfo) {
$file = $fileinfo->getFilename();
if (array_key_exists($file, $loaded_files)) {
continue; // action provided by an earlier item on include_path
}
$parts = explode(".", $file);
if (end($parts) == "php" && !preg_match('/Tests?\.php$/', $file)) {
require_once $action_dir . DIRECTORY_SEPARATOR . $file;
$loaded_files[$file] = TRUE;
}
}
}
}
}
}