| 1 | <?php |
| 2 | /* |
| 3 | +--------------------------------------------------------------------+ |
| 4 | | CiviCRM version 4.6 | |
| 5 | +--------------------------------------------------------------------+ |
| 6 | | Copyright CiviCRM LLC (c) 2004-2015 | |
| 7 | +--------------------------------------------------------------------+ |
| 8 | | This file is a part of CiviCRM. | |
| 9 | | | |
| 10 | | CiviCRM is free software; you can copy, modify, and distribute it | |
| 11 | | under the terms of the GNU Affero General Public License | |
| 12 | | Version 3, 19 November 2007 and the CiviCRM Licensing Exception. | |
| 13 | | | |
| 14 | | CiviCRM is distributed in the hope that it will be useful, but | |
| 15 | | WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 16 | | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. | |
| 17 | | See the GNU Affero General Public License for more details. | |
| 18 | | | |
| 19 | | You should have received a copy of the GNU Affero General Public | |
| 20 | | License and the CiviCRM Licensing Exception along | |
| 21 | | with this program; if not, contact CiviCRM LLC | |
| 22 | | at info[AT]civicrm[DOT]org. If you have questions about the | |
| 23 | | GNU Affero General Public License or the licensing of CiviCRM, | |
| 24 | | see the CiviCRM license FAQ at http://civicrm.org/licensing | |
| 25 | +--------------------------------------------------------------------+ |
| 26 | */ |
| 27 | namespace Civi\API; |
| 28 | |
| 29 | use Civi\API\Event\AuthorizeEvent; |
| 30 | use Civi\API\Event\PrepareEvent; |
| 31 | use Civi\API\Event\ExceptionEvent; |
| 32 | use Civi\API\Event\ResolveEvent; |
| 33 | use Civi\API\Event\RespondEvent; |
| 34 | use Civi\API\Provider\ProviderInterface; |
| 35 | |
| 36 | /** |
| 37 | * @package Civi |
| 38 | * @copyright CiviCRM LLC (c) 2004-2015 |
| 39 | */ |
| 40 | class Kernel { |
| 41 | |
| 42 | /** |
| 43 | * @var \Symfony\Component\EventDispatcher\EventDispatcher |
| 44 | */ |
| 45 | protected $dispatcher; |
| 46 | |
| 47 | /** |
| 48 | * @var array<ProviderInterface> |
| 49 | */ |
| 50 | protected $apiProviders; |
| 51 | |
| 52 | /** |
| 53 | * @param \Symfony\Component\EventDispatcher\EventDispatcher $dispatcher |
| 54 | * The event dispatcher which receives kernel events. |
| 55 | * @param array $apiProviders |
| 56 | * Array of ProviderInterface. |
| 57 | */ |
| 58 | public function __construct($dispatcher, $apiProviders = array()) { |
| 59 | $this->apiProviders = $apiProviders; |
| 60 | $this->dispatcher = $dispatcher; |
| 61 | } |
| 62 | |
| 63 | /** |
| 64 | * @param string $entity |
| 65 | * Type of entities to deal with. |
| 66 | * @param string $action |
| 67 | * Create, get, delete or some special action name. |
| 68 | * @param array $params |
| 69 | * Array to be passed to API function. |
| 70 | * @param mixed $extra |
| 71 | * Who knows. |
| 72 | * |
| 73 | * @return array|int |
| 74 | */ |
| 75 | public function run($entity, $action, $params, $extra = NULL) { |
| 76 | /** |
| 77 | * @var $apiProvider \Civi\API\Provider\ProviderInterface|NULL |
| 78 | */ |
| 79 | $apiProvider = NULL; |
| 80 | |
| 81 | // TODO Define alternative calling convention makes it easier to construct $apiRequest |
| 82 | // without the ambiguity of "data" vs "options" |
| 83 | $apiRequest = Request::create($entity, $action, $params, $extra); |
| 84 | |
| 85 | try { |
| 86 | if (!is_array($params)) { |
| 87 | throw new \API_Exception('Input variable `params` is not an array', 2000); |
| 88 | } |
| 89 | |
| 90 | $this->boot(); |
| 91 | $errorScope = \CRM_Core_TemporaryErrorScope::useException(); |
| 92 | |
| 93 | list($apiProvider, $apiRequest) = $this->resolve($apiRequest); |
| 94 | $this->authorize($apiProvider, $apiRequest); |
| 95 | $apiRequest = $this->prepare($apiProvider, $apiRequest); |
| 96 | $result = $apiProvider->invoke($apiRequest); |
| 97 | |
| 98 | $apiResponse = $this->respond($apiProvider, $apiRequest, $result); |
| 99 | return $this->formatResult($apiRequest, $apiResponse); |
| 100 | } |
| 101 | catch (\Exception $e) { |
| 102 | $this->dispatcher->dispatch(Events::EXCEPTION, new ExceptionEvent($e, $apiProvider, $apiRequest, $this)); |
| 103 | |
| 104 | if ($e instanceof \PEAR_Exception) { |
| 105 | $err = $this->formatPearException($e, $apiRequest); |
| 106 | } |
| 107 | elseif ($e instanceof \API_Exception) { |
| 108 | $err = $this->formatApiException($e, $apiRequest); |
| 109 | } |
| 110 | else { |
| 111 | $err = $this->formatException($e, $apiRequest); |
| 112 | } |
| 113 | |
| 114 | return $this->formatResult($apiRequest, $err); |
| 115 | } |
| 116 | } |
| 117 | |
| 118 | /** |
| 119 | * Determine if a hypothetical API call would be authorized. |
| 120 | * |
| 121 | * @param string $entity |
| 122 | * Type of entities to deal with. |
| 123 | * @param string $action |
| 124 | * Create, get, delete or some special action name. |
| 125 | * @param array $params |
| 126 | * Array to be passed to function. |
| 127 | * @param mixed $extra |
| 128 | * Who knows. |
| 129 | * @return bool |
| 130 | * TRUE if authorization would succeed. |
| 131 | * @throws \Exception |
| 132 | */ |
| 133 | public function runAuthorize($entity, $action, $params, $extra = NULL) { |
| 134 | $apiProvider = NULL; |
| 135 | $apiRequest = Request::create($entity, $action, $params, $extra); |
| 136 | |
| 137 | try { |
| 138 | $this->boot(); |
| 139 | list($apiProvider, $apiRequest) = $this->resolve($apiRequest); |
| 140 | $this->authorize($apiProvider, $apiRequest); |
| 141 | return TRUE; |
| 142 | } |
| 143 | catch (\Civi\API\Exception\UnauthorizedException $e) { |
| 144 | return FALSE; |
| 145 | } |
| 146 | } |
| 147 | |
| 148 | /** |
| 149 | * Bootstrap - Load basic dependencies. |
| 150 | */ |
| 151 | public function boot() { |
| 152 | require_once 'api/v3/utils.php'; |
| 153 | require_once 'api/Exception.php'; |
| 154 | _civicrm_api3_initialize(); |
| 155 | } |
| 156 | |
| 157 | /** |
| 158 | * Determine which, if any, service will execute the API request. |
| 159 | * |
| 160 | * @param array $apiRequest |
| 161 | * The full description of the API request. |
| 162 | * @throws Exception\NotImplementedException |
| 163 | * @return array |
| 164 | * Array(0 => ProviderInterface, 1 => array). |
| 165 | */ |
| 166 | public function resolve($apiRequest) { |
| 167 | /** @var ResolveEvent $resolveEvent */ |
| 168 | $resolveEvent = $this->dispatcher->dispatch(Events::RESOLVE, new ResolveEvent($apiRequest, $this)); |
| 169 | $apiRequest = $resolveEvent->getApiRequest(); |
| 170 | if (!$resolveEvent->getApiProvider()) { |
| 171 | throw new \Civi\API\Exception\NotImplementedException("API (" . $apiRequest['entity'] . ", " . $apiRequest['action'] . ") does not exist (join the API team and implement it!)"); |
| 172 | } |
| 173 | return array($resolveEvent->getApiProvider(), $apiRequest); |
| 174 | } |
| 175 | |
| 176 | /** |
| 177 | * Determine if the API request is allowed (under current policy) |
| 178 | * |
| 179 | * @param ProviderInterface $apiProvider |
| 180 | * The API provider responsible for executing the request. |
| 181 | * @param array $apiRequest |
| 182 | * The full description of the API request. |
| 183 | * @throws Exception\UnauthorizedException |
| 184 | */ |
| 185 | public function authorize($apiProvider, $apiRequest) { |
| 186 | /** @var AuthorizeEvent $event */ |
| 187 | $event = $this->dispatcher->dispatch(Events::AUTHORIZE, new AuthorizeEvent($apiProvider, $apiRequest, $this)); |
| 188 | if (!$event->isAuthorized()) { |
| 189 | throw new \Civi\API\Exception\UnauthorizedException("Authorization failed"); |
| 190 | } |
| 191 | } |
| 192 | |
| 193 | /** |
| 194 | * Allow third-party code to manipulate the API request before execution. |
| 195 | * |
| 196 | * @param ProviderInterface $apiProvider |
| 197 | * The API provider responsible for executing the request. |
| 198 | * @param array $apiRequest |
| 199 | * The full description of the API request. |
| 200 | * @return mixed |
| 201 | */ |
| 202 | public function prepare($apiProvider, $apiRequest) { |
| 203 | /** @var PrepareEvent $event */ |
| 204 | $event = $this->dispatcher->dispatch(Events::PREPARE, new PrepareEvent($apiProvider, $apiRequest, $this)); |
| 205 | return $event->getApiRequest(); |
| 206 | } |
| 207 | |
| 208 | /** |
| 209 | * Allow third-party code to manipulate the API response after execution. |
| 210 | * |
| 211 | * @param ProviderInterface $apiProvider |
| 212 | * The API provider responsible for executing the request. |
| 213 | * @param array $apiRequest |
| 214 | * The full description of the API request. |
| 215 | * @param array $result |
| 216 | * The response to return to the client. |
| 217 | * @return mixed |
| 218 | */ |
| 219 | public function respond($apiProvider, $apiRequest, $result) { |
| 220 | /** @var RespondEvent $event */ |
| 221 | $event = $this->dispatcher->dispatch(Events::RESPOND, new RespondEvent($apiProvider, $apiRequest, $result, $this)); |
| 222 | return $event->getResponse(); |
| 223 | } |
| 224 | |
| 225 | /** |
| 226 | * @param int $version |
| 227 | * API version. |
| 228 | * @return array |
| 229 | * Array<string>. |
| 230 | */ |
| 231 | public function getEntityNames($version) { |
| 232 | // Question: Would it better to eliminate $this->apiProviders and just use $this->dispatcher? |
| 233 | $entityNames = array(); |
| 234 | foreach ($this->getApiProviders() as $provider) { |
| 235 | /** @var ProviderInterface $provider */ |
| 236 | $entityNames = array_merge($entityNames, $provider->getEntityNames($version)); |
| 237 | } |
| 238 | $entityNames = array_unique($entityNames); |
| 239 | sort($entityNames); |
| 240 | return $entityNames; |
| 241 | } |
| 242 | |
| 243 | /** |
| 244 | * @param int $version |
| 245 | * API version. |
| 246 | * @param string $entity |
| 247 | * API entity. |
| 248 | * @return array |
| 249 | * Array<string> |
| 250 | */ |
| 251 | public function getActionNames($version, $entity) { |
| 252 | // Question: Would it better to eliminate $this->apiProviders and just use $this->dispatcher? |
| 253 | $actionNames = array(); |
| 254 | foreach ($this->getApiProviders() as $provider) { |
| 255 | /** @var ProviderInterface $provider */ |
| 256 | $actionNames = array_merge($actionNames, $provider->getActionNames($version, $entity)); |
| 257 | } |
| 258 | $actionNames = array_unique($actionNames); |
| 259 | sort($actionNames); |
| 260 | return $actionNames; |
| 261 | } |
| 262 | |
| 263 | /** |
| 264 | * @param \Exception $e |
| 265 | * An unhandled exception. |
| 266 | * @param array $apiRequest |
| 267 | * The full description of the API request. |
| 268 | * @return array |
| 269 | * API response. |
| 270 | */ |
| 271 | public function formatException($e, $apiRequest) { |
| 272 | $data = array(); |
| 273 | if (!empty($apiRequest['params']['debug'])) { |
| 274 | $data['trace'] = $e->getTraceAsString(); |
| 275 | } |
| 276 | return $this->createError($e->getMessage(), $data, $apiRequest, $e->getCode()); |
| 277 | } |
| 278 | |
| 279 | /** |
| 280 | * @param \API_Exception $e |
| 281 | * An unhandled exception. |
| 282 | * @param array $apiRequest |
| 283 | * The full description of the API request. |
| 284 | * @return array |
| 285 | * (API response) |
| 286 | */ |
| 287 | public function formatApiException($e, $apiRequest) { |
| 288 | $data = $e->getExtraParams(); |
| 289 | $data['entity'] = \CRM_Utils_Array::value('entity', $apiRequest); |
| 290 | $data['action'] = \CRM_Utils_Array::value('action', $apiRequest); |
| 291 | |
| 292 | if (\CRM_Utils_Array::value('debug', \CRM_Utils_Array::value('params', $apiRequest)) |
| 293 | && empty($data['trace']) // prevent recursion |
| 294 | ) { |
| 295 | $data['trace'] = $e->getTraceAsString(); |
| 296 | } |
| 297 | |
| 298 | return $this->createError($e->getMessage(), $data, $apiRequest, $e->getCode()); |
| 299 | } |
| 300 | |
| 301 | /** |
| 302 | * @param \PEAR_Exception $e |
| 303 | * An unhandled exception. |
| 304 | * @param array $apiRequest |
| 305 | * The full description of the API request. |
| 306 | * @return array |
| 307 | * API response. |
| 308 | */ |
| 309 | public function formatPearException($e, $apiRequest) { |
| 310 | $data = array(); |
| 311 | $error = $e->getCause(); |
| 312 | if ($error instanceof \DB_Error) { |
| 313 | $data["error_code"] = \DB::errorMessage($error->getCode()); |
| 314 | $data["sql"] = $error->getDebugInfo(); |
| 315 | } |
| 316 | if (!empty($apiRequest['params']['debug'])) { |
| 317 | if (method_exists($e, 'getUserInfo')) { |
| 318 | $data['debug_info'] = $error->getUserInfo(); |
| 319 | } |
| 320 | if (method_exists($e, 'getExtraData')) { |
| 321 | $data['debug_info'] = $data + $error->getExtraData(); |
| 322 | } |
| 323 | $data['trace'] = $e->getTraceAsString(); |
| 324 | } |
| 325 | else { |
| 326 | $data['tip'] = "add debug=1 to your API call to have more info about the error"; |
| 327 | } |
| 328 | |
| 329 | return $this->createError($e->getMessage(), $data, $apiRequest); |
| 330 | } |
| 331 | |
| 332 | /** |
| 333 | * @param string $msg |
| 334 | * Descriptive error message. |
| 335 | * @param array $data |
| 336 | * Error data. |
| 337 | * @param array $apiRequest |
| 338 | * The full description of the API request. |
| 339 | * @param mixed $code |
| 340 | * Doesn't appear to be used. |
| 341 | * |
| 342 | * @throws \API_Exception |
| 343 | * @return array |
| 344 | * Array<type>. |
| 345 | */ |
| 346 | public function createError($msg, $data, $apiRequest, $code = NULL) { |
| 347 | // FIXME what to do with $code? |
| 348 | if ($msg == 'DB Error: constraint violation' || substr($msg, 0, 9) == 'DB Error:' || $msg == 'DB Error: already exists') { |
| 349 | try { |
| 350 | $fields = _civicrm_api3_api_getfields($apiRequest); |
| 351 | _civicrm_api3_validate_fields($apiRequest['entity'], $apiRequest['action'], $apiRequest['params'], $fields, TRUE); |
| 352 | } |
| 353 | catch (\Exception $e) { |
| 354 | $msg = $e->getMessage(); |
| 355 | } |
| 356 | } |
| 357 | |
| 358 | $data = civicrm_api3_create_error($msg, $data); |
| 359 | |
| 360 | if (isset($apiRequest['params']) && is_array($apiRequest['params']) && !empty($apiRequest['params']['api.has_parent'])) { |
| 361 | $errorCode = empty($data['error_code']) ? 'chained_api_failed' : $data['error_code']; |
| 362 | throw new \API_Exception('Error in call to ' . $apiRequest['entity'] . '_' . $apiRequest['action'] . ' : ' . $msg, $errorCode, $data); |
| 363 | } |
| 364 | |
| 365 | return $data; |
| 366 | } |
| 367 | |
| 368 | /** |
| 369 | * @param array $apiRequest |
| 370 | * The full description of the API request. |
| 371 | * @param array $result |
| 372 | * The response to return to the client. |
| 373 | * @return mixed |
| 374 | */ |
| 375 | public function formatResult($apiRequest, $result) { |
| 376 | if (isset($apiRequest, $apiRequest['params'])) { |
| 377 | if (isset($apiRequest['params']['format.is_success']) && $apiRequest['params']['format.is_success'] == 1) { |
| 378 | return (empty($result['is_error'])) ? 1 : 0; |
| 379 | } |
| 380 | |
| 381 | if (!empty($apiRequest['params']['format.only_id']) && isset($result['id'])) { |
| 382 | // FIXME dispatch |
| 383 | return $result['id']; |
| 384 | } |
| 385 | } |
| 386 | return $result; |
| 387 | } |
| 388 | |
| 389 | /** |
| 390 | * @return array<ProviderInterface> |
| 391 | */ |
| 392 | public function getApiProviders() { |
| 393 | return $this->apiProviders; |
| 394 | } |
| 395 | |
| 396 | /** |
| 397 | * @param array $apiProviders |
| 398 | * Array<ProviderInterface>. |
| 399 | * @return Kernel |
| 400 | */ |
| 401 | public function setApiProviders($apiProviders) { |
| 402 | $this->apiProviders = $apiProviders; |
| 403 | return $this; |
| 404 | } |
| 405 | |
| 406 | /** |
| 407 | * @param ProviderInterface $apiProvider |
| 408 | * The API provider responsible for executing the request. |
| 409 | * @return Kernel |
| 410 | */ |
| 411 | public function registerApiProvider($apiProvider) { |
| 412 | $this->apiProviders[] = $apiProvider; |
| 413 | if ($apiProvider instanceof \Symfony\Component\EventDispatcher\EventSubscriberInterface) { |
| 414 | $this->getDispatcher()->addSubscriber($apiProvider); |
| 415 | } |
| 416 | return $this; |
| 417 | } |
| 418 | |
| 419 | /** |
| 420 | * @return \Symfony\Component\EventDispatcher\EventDispatcher |
| 421 | */ |
| 422 | public function getDispatcher() { |
| 423 | return $this->dispatcher; |
| 424 | } |
| 425 | |
| 426 | /** |
| 427 | * @param \Symfony\Component\EventDispatcher\EventDispatcher $dispatcher |
| 428 | * The event dispatcher which receives kernel events. |
| 429 | * @return Kernel |
| 430 | */ |
| 431 | public function setDispatcher($dispatcher) { |
| 432 | $this->dispatcher = $dispatcher; |
| 433 | return $this; |
| 434 | } |
| 435 | |
| 436 | } |