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