CRM/Utils/API/MatchOption.php

   1 <?php
   2 /*
   3  +--------------------------------------------------------------------+
   4  | CiviCRM version 4.7                                                |
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   6  | Copyright CiviCRM LLC (c) 2004-2015                                |
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   8  | This file is a part of CiviCRM.                                    |
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  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         |
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  17  | See the GNU Affero General Public License for more details.        |
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  19  | You should have received a copy of the GNU Affero General Public   |
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  22  | at info[AT]civicrm[DOT]org. If you have questions about the        |
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  24  | see the CiviCRM license FAQ at http://civicrm.org/licensing        |
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  26  */
  27
  28 /**
  29  * Implement the "match" and "match-mandatory" options. If the submitted record doesn't have an ID
  30  * but a "match" key is specified, then we will automatically search for pre-existing record and
  31  * fill-in the missing ID. The "match" or "match-mandatory" can specified as a string (the name of the key
  32  * to match on) or array (the names of several keys to match on).
  33  *
  34  * Note that "match" and "match-mandatory" behave the same in the case where one matching record
  35  * exists (ie they update the record). They also behave the same if there are multiple matching
  36  * records (ie they throw an error).  However, if there is no matching record, they differ:
  37  *   - "match-mandatory" will generate an error
  38  *   - "match" will allow action to proceed -- thus inserting a new record
  39  *
  40  * @code
  41  * $result = civicrm_api('contact', 'create', array(
  42  *   'options' => array(
  43  *     'match' => array('last_name', 'first_name')
  44  *   ),
  45  *   'first_name' => 'Jeffrey',
  46  *   'last_name' => 'Lebowski',
  47  *   'nick_name' => 'The Dude',
  48  * ));
  49  * @endcode
  50  *
  51  * @package CRM
  52  * @copyright CiviCRM LLC (c) 2004-2015
  53  */
  54
  55 require_once 'api/Wrapper.php';
  56
  57 /**
  58  * Class CRM_Utils_API_MatchOption
  59  */
  60 class CRM_Utils_API_MatchOption implements API_Wrapper {
  61
  62   /**
  63    * @var CRM_Utils_API_MatchOption
  64    */
  65   private static $_singleton = NULL;
  66
  67   /**
  68    * @return CRM_Utils_API_MatchOption
  69    */
  70   public static function singleton() {
  71     if (self::$_singleton === NULL) {
  72       self::$_singleton = new CRM_Utils_API_MatchOption();
  73     }
  74     return self::$_singleton;
  75   }
  76
  77   /**
  78    * @inheritDoc
  79    */
  80   public function fromApiInput($apiRequest) {
  81
  82     // Parse options.match or options.match-mandatory
  83     $keys = NULL; // array of fields to match against
  84     if (isset($apiRequest['params'], $apiRequest['params']['options']) && is_array($apiRequest['params']['options'])) {
  85       if (isset($apiRequest['params']['options']['match-mandatory'])) {
  86         $isMandatory = TRUE;
  87         $keys = $apiRequest['params']['options']['match-mandatory'];
  88       }
  89       elseif (isset($apiRequest['params']['options']['match'])) {
  90         $isMandatory = FALSE;
  91         $keys = $apiRequest['params']['options']['match'];
  92       }
  93       if (is_string($keys)) {
  94         $keys = array($keys);
  95       }
  96     }
  97
  98     // If one of the options was specified, then try to match records.
  99     // Matching logic differs for 'create' and 'replace' actions.
 100     if ($keys !== NULL) {
 101       switch ($apiRequest['action']) {
 102         case 'create':
 103           if (empty($apiRequest['params']['id'])) {
 104             $apiRequest['params'] = $this->match($apiRequest['entity'], $apiRequest['params'], $keys, $isMandatory);
 105           }
 106           break;
 107
 108         case 'replace':
 109           // In addition to matching on the listed keys, also match on the set-definition keys.
 110           // For example, if the $apiRequest is to "replace the set of civicrm_emails for contact_id=123 while
 111           // matching emails on location_type_id", then we would need to search for pre-existing emails using
 112           // both 'contact_id' and 'location_type_id'
 113           $baseParams = _civicrm_api3_generic_replace_base_params($apiRequest['params']);
 114           $keys = array_unique(array_merge(
 115             array_keys($baseParams),
 116             $keys
 117           ));
 118
 119           // attempt to match each replacement item
 120           foreach ($apiRequest['params']['values'] as $offset => $createParams) {
 121             $createParams = array_merge($baseParams, $createParams);
 122             $createParams = $this->match($apiRequest['entity'], $createParams, $keys, $isMandatory);
 123             $apiRequest['params']['values'][$offset] = $createParams;
 124           }
 125           break;
 126
 127         default:
 128           // be forgiving of sloppy api calls
 129       }
 130     }
 131
 132     return $apiRequest;
 133   }
 134
 135   /**
 136    * Attempt to match a contact. This filters/updates the $createParams if there is a match.
 137    *
 138    * @param string $entity
 139    * @param array $createParams
 140    * @param array $keys
 141    * @param bool $isMandatory
 142    * @return array
 143    *   revised $createParams, including 'id' if known
 144    * @throws API_Exception
 145    */
 146   public function match($entity, $createParams, $keys, $isMandatory) {
 147     $getParams = $this->createGetParams($createParams, $keys);
 148     $getResult = civicrm_api3($entity, 'get', $getParams);
 149     if ($getResult['count'] == 0) {
 150       if ($isMandatory) {
 151         throw new API_Exception("Failed to match existing record");
 152       }
 153       return $createParams; // OK, don't care
 154     }
 155     elseif ($getResult['count'] == 1) {
 156       $item = array_shift($getResult['values']);
 157       $createParams['id'] = $item['id'];
 158       return $createParams;
 159     }
 160     else {
 161       throw new API_Exception("Ambiguous match criteria");
 162     }
 163   }
 164
 165   /**
 166    * @inheritDoc
 167    */
 168   public function toApiOutput($apiRequest, $result) {
 169     return $result;
 170   }
 171
 172   /**
 173    * Create APIv3 "get" parameters to lookup an existing record using $keys
 174    *
 175    * @param array $origParams
 176    *   Api request.
 177    * @param array $keys
 178    *   List of keys to match against.
 179    *
 180    * @return array
 181    *   APIv3 $params
 182    */
 183   public function createGetParams($origParams, $keys) {
 184     $params = array('version' => 3);
 185     foreach ($keys as $key) {
 186       $params[$key] = CRM_Utils_Array::value($key, $origParams, '');
 187     }
 188     return $params;
 189   }
 190
 191 }