api/class.api.php

   1 <?php
   2
   3 /**
   4  *
   5  * This class allows to consume the API, either from within a module that knows civicrm already:
   6  *
   7  * @code
   8  *   require_once('api/class.api.php');
   9  *   $api = new civicrm_api3();
  10  * @endcode
  11  *
  12  * or from any code on the same server as civicrm
  13  *
  14  * @code
  15  *   require_once('/your/civi/folder/api/class.api.php');
  16  *   // the path to civicrm.settings.php
  17  *   $api = new civicrm_api3 (array('conf_path'=> '/your/path/to/your/civicrm/or/joomla/site));
  18  * @endcode
  19  *
  20  * or to query a remote server via the rest api
  21  *
  22  * @code
  23  *   $api = new civicrm_api3 (array ('server' => 'http://example.org',
  24  *                                   'api_key'=>'theusersecretkey',
  25  *                                   'key'=>'thesitesecretkey'));
  26  * @endcode
  27  *
  28  * No matter how initialised and if civicrm is local or remote, you use the class the same way.
  29  *
  30  * @code
  31  *   $api->{entity}->{action}($params);
  32  * @endcode
  33  *
  34  * So, to get the individual contacts:
  35  *
  36  * @code
  37  *   if ($api->Contact->Get(array('contact_type'=>'Individual','return'=>'sort_name,current_employer')) {
  38  *     // each key of the result array is an attribute of the api
  39  *     echo "\n contacts found " . $api->count;
  40  *     foreach ($api->values as $c) {
  41  *       echo "\n".$c->sort_name. " working for ". $c->current_employer;
  42  *     }
  43  *     // in theory, doesn't append
  44  *   } else {
  45  *     echo $api->errorMsg();
  46  *   }
  47  * @endcode
  48  *
  49  * Or, to create an event:
  50  *
  51  * @code
  52  *   if ($api->Event->Create(array('title'=>'Test','event_type_id' => 1,'is_public' => 1,'start_date' => 19430429))) {
  53  *     echo "created event id:". $api->id;
  54  *   } else {
  55  *     echo $api->errorMsg();
  56  *   }
  57  * @endcode
  58  *
  59  * To make it easier, the Actions can either take for input an
  60  * associative array $params, or simply an id. The following two lines
  61  * are equivalent.
  62  *
  63  * @code
  64  *   $api->Activity->Get (42);
  65  *   $api->Activity->Get (array('id'=>42));
  66  * @endcode
  67  *
  68  *
  69  * You can also get the result like civicrm_api does, but as an object
  70  * instead of an array (eg $entity->attribute instead of
  71  * $entity['attribute']).
  72  *
  73  * @code
  74  *   $result = $api->result;
  75  *   // is the json encoded result
  76  *   echo $api;
  77  * @endcode
  78  */
  79 class civicrm_api3 {
  80
  81   /**
  82    * @param array API configuration.
  83    */
  84   function __construct($config = NULL) {
  85     $this->local      = TRUE;
  86     $this->input      = array();
  87     $this->lastResult = array();
  88     if (isset($config) && isset($config['server'])) {
  89       // we are calling a remote server via REST
  90       $this->local = FALSE;
  91       $this->uri = $config['server'];
  92       if (isset($config['path'])) {
  93         $this->uri .= "/" . $config['path'];
  94       }
  95       else {
  96         $this->uri .= '/sites/all/modules/civicrm/extern/rest.php';
  97       }
  98       $this->uri .= '?json=1';
  99       if (isset($config['key'])) {
 100         $this->key = $config['key'];
 101       }
 102       else {
 103         die("\nFATAL:param['key] missing\n");
 104       }
 105       if (isset($config['api_key'])) {
 106         $this->api_key = $config['api_key'];
 107       }
 108       else {
 109         die("\nFATAL:param['api_key] missing\n");
 110       }
 111       return;
 112     }
 113     if (isset($config) && isset($config['conf_path'])) {
 114       define('CIVICRM_SETTINGS_PATH', $config['conf_path'] . '/civicrm.settings.php');
 115       require_once CIVICRM_SETTINGS_PATH;
 116       require_once 'CRM/Core/ClassLoader.php';
 117       require_once 'api/api.php';
 118       require_once "api/v3/utils.php";
 119       CRM_Core_ClassLoader::singleton()->register();
 120       $this->cfg = CRM_Core_Config::singleton();
 121       $this->init();
 122     }
 123     else {
 124       $this->cfg = CRM_Core_Config::singleton();
 125     }
 126   }
 127
 128   /**
 129    *
 130    */
 131   public function __toString() {
 132     return json_encode($this->lastResult);
 133   }
 134
 135   /**
 136    *
 137    */
 138   public function __call($action, $params) {
 139     // @TODO Check if it's a valid action.
 140     if (isset($params[0])) {
 141       return $this->call($this->currentEntity, $action, $params[0]);
 142     }
 143     else {
 144       return $this->call($this->currentEntity, $action, $this->input);
 145     }
 146   }
 147
 148   /**
 149    *  As of PHP 5.3.0
 150    */
 151   public static function __callStatic($name, $arguments) {
 152     // Should we implement it ?
 153     echo "Calling static method '$name' " . implode(', ', $arguments) . "\n";
 154   }
 155
 156   /**
 157    *
 158    */
 159   function remoteCall($entity, $action, $params = array()) {
 160     $fields = "key={$this->key}&api_key={$this->api_key}";
 161     $query = $this->uri . "&entity=$entity&action=$action";
 162     foreach ($params as $k => $v) {
 163       $fields .= "&$k=" . urlencode($v);
 164     }
 165     if (function_exists('curl_init')) {
 166       // To facilitate debugging without leaking info, entity & action
 167       // are GET, other data is POST.
 168       $ch = curl_init();
 169       curl_setopt($ch, CURLOPT_URL, $query);
 170       curl_setopt($ch, CURLOPT_POST, count($params) + 2);
 171       curl_setopt($ch, CURLOPT_POSTFIELDS, $fields);
 172       curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
 173       $result = curl_exec($ch);
 174       // CiviCRM expects to get back a CiviCRM error object.
 175       if (curl_errno($ch)) {
 176         $res = new stdClass;
 177         $res->is_error = 1;
 178         $res->error_message = curl_error($ch);
 179         $res->level = "cURL";
 180         $res->error = array('cURL error' => curl_error($ch));
 181         return $res;
 182       }
 183       curl_close($ch);
 184     }
 185     else {
 186       // Should be discouraged, because the API credentials and data
 187       // are submitted as GET data, increasing chance of exposure..
 188       $result = file_get_contents($query . '&' . $fields);
 189     }
 190     if (!$res = json_decode($result)) {
 191       $res = new stdClass;
 192       $res->is_error = 1;
 193       $res->error_message = 'Unable to parse returned JSON';
 194       $res->level = 'json_decode';
 195       $res->error = array('Unable to parse returned JSON' => $result);
 196       $res->row_result = $result;
 197     }
 198     return $res;
 199   }
 200
 201   function call($entity, $action = 'Get', $params = array()) {
 202     if (is_int($params)) {
 203       $params = array('id' => $params);
 204     }
 205     elseif (is_string($params)) {
 206       $params = json_decode($params);
 207     }
 208
 209     if (!isset($params['version'])) {
 210       $params['version'] = 3;
 211     }
 212     if (!isset($params['sequential'])) {
 213       $params['sequential'] = 1;
 214     }
 215
 216     if (!$this->local) {
 217       $this->lastResult = $this->remoteCall($entity, $action, $params);
 218     }
 219     else {
 220       // Converts a multi-dimentional array into an object.
 221       $this->lastResult = json_decode(json_encode(civicrm_api($entity, $action, $params)));
 222     }
 223     // Reset the input to be ready for a new call.
 224     $this->input = array();
 225     if (property_exists($this->lastResult, 'is_error')) {
 226       return !$this->lastResult->is_error;
 227     }
 228     // getsingle doesn't have is_error.
 229     return TRUE;
 230   }
 231
 232   /**
 233    * Helper method for long running programs (eg bots).
 234    */
 235   function ping() {
 236     global $_DB_DATAOBJECT;
 237     foreach ($_DB_DATAOBJECT['CONNECTIONS'] as & $c) {
 238       if (!$c->connection->ping()) {
 239         $c->connect($this->cfg->dsn);
 240         if (!$c->connection->ping()) {
 241           die("we couldn't connect");
 242         }
 243       }
 244     }
 245   }
 246
 247   /**
 248    * Return the last error message.
 249    */
 250   function errorMsg() {
 251     return $this->lastResult->error_message;
 252   }
 253
 254   /**
 255    *
 256    */
 257   function init() {
 258     CRM_Core_DAO::init($this->cfg->dsn);
 259   }
 260
 261   /**
 262    *
 263    */
 264   public function attr($name, $value = NULL) {
 265     if ($value === NULL) {
 266       if (property_exists($this->lastResult, $name)) {
 267         return $this->lastResult->$name;
 268       }
 269     }
 270     else {
 271       $this->input[$name] = $value;
 272     }
 273     return $this;
 274   }
 275
 276   /**
 277    *
 278    */
 279   public function is_error() {
 280     return (property_exists($this->lastResult, 'is_error') && $this->lastResult->is_error);
 281   }
 282
 283   /**
 284    *
 285    */
 286   public function is_set($name) {
 287     return (isset($this->lastResult->$name));
 288   }
 289
 290   /**
 291    *
 292    */
 293   public function __get($name) {
 294     // @TODO Test if valid entity.
 295     if (strtolower($name) !== $name) {
 296       // Cheap and dumb test to differentiate call to
 297       // $api->Entity->Action & value retrieval.
 298       $this->currentEntity = $name;
 299       return $this;
 300     }
 301     if ($name === 'result') {
 302       return $this->lastResult;
 303     }
 304     if ($name === 'values') {
 305       return $this->lastResult->values;
 306     }
 307     if (property_exists($this->lastResult, $name)) {
 308       return $this->lastResult->$name;
 309     }
 310     $this->currentEntity = $name;
 311     return $this;
 312   }
 313
 314   /**
 315    * Or use $api->value.
 316    */
 317   public function values() {
 318     if (is_array($this->lastResult)) {
 319       return $this->lastResult['values'];
 320     }
 321     else {
 322       return $this->lastResult->values;
 323     }
 324   }
 325
 326   /**
 327    * Or use $api->result.
 328    */
 329   public function result() {
 330     return $this->lastResult;
 331   }
 332 }