CRM/Dedupe/BAO/RuleGroup.php

   1 <?php
   2 /*
   3  +--------------------------------------------------------------------+
   4  | CiviCRM version 4.7                                                |
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   6  | Copyright CiviCRM LLC (c) 2004-2016                                |
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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.   |
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  26  */
  27
  28 /**
  29  *
  30  * @package CRM
  31  * @copyright CiviCRM LLC (c) 2004-2016
  32  * $Id$
  33  *
  34  */
  35
  36 /**
  37  * The CiviCRM duplicate discovery engine is based on an
  38  * algorithm designed by David Strauss <david@fourkitchens.com>.
  39  */
  40 class CRM_Dedupe_BAO_RuleGroup extends CRM_Dedupe_DAO_RuleGroup {
  41
  42   /**
  43    * Ids of the contacts to limit the SQL queries (whole-database queries otherwise)
  44    */
  45   var $contactIds = array();
  46
  47   /**
  48    * Set the contact IDs to restrict the dedupe to.
  49    *
  50    * @param array $contactIds
  51    */
  52   public function setContactIds($contactIds) {
  53     $this->contactIds = $contactIds;
  54   }
  55
  56   /**
  57    * Params to dedupe against (queries against the whole contact set otherwise)
  58    */
  59   var $params = array();
  60
  61   /**
  62    * If there are no rules in rule group.
  63    */
  64   var $noRules = FALSE;
  65
  66   /**
  67    * Return a structure holding the supported tables, fields and their titles
  68    *
  69    * @param string $requestedType
  70    *   The requested contact type.
  71    *
  72    * @return array
  73    *   a table-keyed array of field-keyed arrays holding supported fields' titles
  74    */
  75   public static function &supportedFields($requestedType) {
  76     static $fields = NULL;
  77     if (!$fields) {
  78       // this is needed, as we're piggy-backing importableFields() below
  79       $replacements = array(
  80         'civicrm_country.name' => 'civicrm_address.country_id',
  81         'civicrm_county.name' => 'civicrm_address.county_id',
  82         'civicrm_state_province.name' => 'civicrm_address.state_province_id',
  83         'gender.label' => 'civicrm_contact.gender_id',
  84         'individual_prefix.label' => 'civicrm_contact.prefix_id',
  85         'individual_suffix.label' => 'civicrm_contact.suffix_id',
  86         'addressee.label' => 'civicrm_contact.addressee_id',
  87         'email_greeting.label' => 'civicrm_contact.email_greeting_id',
  88         'postal_greeting.label' => 'civicrm_contact.postal_greeting_id',
  89         'civicrm_phone.phone' => 'civicrm_phone.phone_numeric',
  90       );
  91       // the table names we support in dedupe rules - a filter for importableFields()
  92       $supportedTables = array(
  93         'civicrm_address',
  94         'civicrm_contact',
  95         'civicrm_email',
  96         'civicrm_im',
  97         'civicrm_note',
  98         'civicrm_openid',
  99         'civicrm_phone',
 100       );
 101
 102       foreach (array('Individual', 'Organization', 'Household') as $ctype) {
 103         // take the table.field pairs and their titles from importableFields() if the table is supported
 104         foreach (CRM_Contact_BAO_Contact::importableFields($ctype) as $iField) {
 105           if (isset($iField['where'])) {
 106             $where = $iField['where'];
 107             if (isset($replacements[$where])) {
 108               $where = $replacements[$where];
 109             }
 110             list($table, $field) = explode('.', $where);
 111             if (!in_array($table, $supportedTables)) {
 112               continue;
 113             }
 114             $fields[$ctype][$table][$field] = $iField['title'];
 115           }
 116         }
 117         // add custom data fields
 118         foreach (CRM_Core_BAO_CustomGroup::getTree($ctype, CRM_Core_DAO::$_nullObject, NULL, -1) as $key => $cg) {
 119           if (!is_int($key)) {
 120             continue;
 121           }
 122           foreach ($cg['fields'] as $cf) {
 123             $fields[$ctype][$cg['table_name']][$cf['column_name']] = $cf['label'];
 124           }
 125         }
 126       }
 127     }
 128     CRM_Utils_Hook::dupeQuery(CRM_Core_DAO::$_nullObject, 'supportedFields', $fields);
 129     return $fields[$requestedType];
 130   }
 131
 132   /**
 133    * Return the SQL query for dropping the temporary table.
 134    */
 135   public function tableDropQuery() {
 136     return 'DROP TEMPORARY TABLE IF EXISTS dedupe';
 137   }
 138
 139   /**
 140    * Return a set of SQL queries whose cummulative weights will mark matched
 141    * records for the RuleGroup::threasholdQuery() to retrieve.
 142    */
 143   public function tableQuery() {
 144     // make sure we've got a fetched dbrecord, not sure if this is enforced
 145     if (!$this->name == NULL || $this->is_reserved == NULL) {
 146       $this->find(TRUE);
 147     }
 148
 149     // Reserved Rule Groups can optionally get special treatment by
 150     // implementing an optimization class and returning a query array.
 151     if ($this->is_reserved &&
 152       CRM_Utils_File::isIncludable("CRM/Dedupe/BAO/QueryBuilder/{$this->name}.php")
 153     ) {
 154       $command = empty($this->params) ? 'internal' : 'record';
 155       $queries = call_user_func(array("CRM_Dedupe_BAO_QueryBuilder_{$this->name}", $command), $this);
 156     }
 157     else {
 158       // All other rule groups have queries generated by the member dedupe
 159       // rules defined in the administrative interface.
 160
 161       // Find all rules contained by this script sorted by weight so that
 162       // their execution can be short circuited on RuleGroup::fillTable()
 163       $bao = new CRM_Dedupe_BAO_Rule();
 164       $bao->dedupe_rule_group_id = $this->id;
 165       $bao->orderBy('rule_weight DESC');
 166       $bao->find();
 167
 168       // Generate a SQL query for each rule in the rule group that is
 169       // tailored to respect the param and contactId options provided.
 170       $queries = array();
 171       while ($bao->fetch()) {
 172         $bao->contactIds = $this->contactIds;
 173         $bao->params = $this->params;
 174
 175         // Skipping empty rules? Empty rules shouldn't exist; why check?
 176         if ($query = $bao->sql()) {
 177           $queries["{$bao->rule_table}.{$bao->rule_field}.{$bao->rule_weight}"] = $query;
 178         }
 179       }
 180     }
 181
 182     // if there are no rules in this rule group
 183     // add an empty query fulfilling the pattern
 184     if (!$queries) {
 185       $this->noRules = TRUE;
 186       return array();
 187     }
 188
 189     return $queries;
 190   }
 191
 192   public function fillTable() {
 193     // get the list of queries handy
 194     $tableQueries = $this->tableQuery();
 195
 196     if ($this->params && !$this->noRules) {
 197       $tempTableQuery = "CREATE TEMPORARY TABLE dedupe (id1 int, weight int, UNIQUE UI_id1 (id1)) ENGINE=MyISAM";
 198       $insertClause = "INSERT INTO dedupe (id1, weight)";
 199       $groupByClause = "GROUP BY id1";
 200       $dupeCopyJoin = " JOIN dedupe_copy ON dedupe_copy.id1 = t1.column WHERE ";
 201     }
 202     else {
 203       $tempTableQuery = "CREATE TEMPORARY TABLE dedupe (id1 int, id2 int, weight int, UNIQUE UI_id1_id2 (id1, id2)) ENGINE=MyISAM";
 204       $insertClause = "INSERT INTO dedupe (id1, id2, weight)";
 205       $groupByClause = "GROUP BY id1, id2";
 206       $dupeCopyJoin = " JOIN dedupe_copy ON dedupe_copy.id1 = t1.column AND dedupe_copy.id2 = t2.column WHERE ";
 207     }
 208     $patternColumn = '/t1.(\w+)/';
 209     $exclWeightSum = array();
 210
 211     // create temp table
 212     $dao = new CRM_Core_DAO();
 213     $dao->query($tempTableQuery);
 214
 215     CRM_Utils_Hook::dupeQuery($this, 'table', $tableQueries);
 216
 217     while (!empty($tableQueries)) {
 218       list($isInclusive, $isDie) = self::isQuerySetInclusive($tableQueries, $this->threshold, $exclWeightSum);
 219
 220       if ($isInclusive) {
 221         // order queries by table count
 222         self::orderByTableCount($tableQueries);
 223
 224         $weightSum = array_sum($exclWeightSum);
 225         $searchWithinDupes = !empty($exclWeightSum) ? 1 : 0;
 226
 227         while (!empty($tableQueries)) {
 228           // extract the next query ( and weight ) to be executed
 229           $fieldWeight = array_keys($tableQueries);
 230           $fieldWeight = $fieldWeight[0];
 231           $query = array_shift($tableQueries);
 232
 233           if ($searchWithinDupes) {
 234             // get prepared to search within already found dupes if $searchWithinDupes flag is set
 235             $dao->query("DROP TEMPORARY TABLE IF EXISTS dedupe_copy");
 236             $dao->query("CREATE TEMPORARY TABLE dedupe_copy SELECT * FROM dedupe WHERE weight >= {$weightSum}");
 237             $dao->free();
 238
 239             preg_match($patternColumn, $query, $matches);
 240             $query = str_replace(' WHERE ', str_replace('column', $matches[1], $dupeCopyJoin), $query);
 241           }
 242           $searchWithinDupes = 1;
 243
 244           // construct and execute the intermediate query
 245           $query = "{$insertClause} {$query} {$groupByClause} ON DUPLICATE KEY UPDATE weight = weight + VALUES(weight)";
 246           $dao->query($query);
 247
 248           // FIXME: we need to be more acurate with affected rows, especially for insert vs duplicate insert.
 249           // And that will help optimize further.
 250           $affectedRows = $dao->affectedRows();
 251           $dao->free();
 252
 253           // In an inclusive situation, failure of any query means no further processing -
 254           if ($affectedRows == 0) {
 255             // reset to make sure no further execution is done.
 256             $tableQueries = array();
 257             break;
 258           }
 259           $weightSum = substr($fieldWeight, strrpos($fieldWeight, '.') + 1) + $weightSum;
 260         }
 261         // An exclusive situation -
 262       }
 263       elseif (!$isDie) {
 264         // since queries are already sorted by weights, we can continue as is
 265         $fieldWeight = array_keys($tableQueries);
 266         $fieldWeight = $fieldWeight[0];
 267         $query = array_shift($tableQueries);
 268         $query = "{$insertClause} {$query} {$groupByClause} ON DUPLICATE KEY UPDATE weight = weight + VALUES(weight)";
 269         $dao->query($query);
 270         if ($dao->affectedRows() >= 1) {
 271           $exclWeightSum[] = substr($fieldWeight, strrpos($fieldWeight, '.') + 1);
 272         }
 273         $dao->free();
 274       }
 275       else {
 276         // its a die situation
 277         break;
 278       }
 279     }
 280   }
 281
 282   /**
 283    * Function to determine if a given query set contains inclusive or exclusive set of weights.
 284    * The function assumes that the query set is already ordered by weight in desc order.
 285    * @param $tableQueries
 286    * @param $threshold
 287    * @param array $exclWeightSum
 288    *
 289    * @return array
 290    */
 291   public static function isQuerySetInclusive($tableQueries, $threshold, $exclWeightSum = array()) {
 292     $input = array();
 293     foreach ($tableQueries as $key => $query) {
 294       $input[] = substr($key, strrpos($key, '.') + 1);
 295     }
 296
 297     if (!empty($exclWeightSum)) {
 298       $input = array_merge($input, $exclWeightSum);
 299       rsort($input);
 300     }
 301
 302     if (count($input) == 1) {
 303       return array(FALSE, $input[0] < $threshold);
 304     }
 305
 306     $totalCombinations = 0;
 307     for ($i = 0; $i < count($input); $i++) {
 308       $combination = array($input[$i]);
 309       if (array_sum($combination) >= $threshold) {
 310         $totalCombinations++;
 311         continue;
 312       }
 313       for ($j = $i + 1; $j < count($input); $j++) {
 314         $combination[] = $input[$j];
 315         if (array_sum($combination) >= $threshold) {
 316           $totalCombinations++;
 317         }
 318       }
 319     }
 320     return array($totalCombinations == 1, $totalCombinations <= 0);
 321   }
 322
 323   /**
 324    * sort queries by number of records for the table associated with them.
 325    * @param $tableQueries
 326    */
 327   public static function orderByTableCount(&$tableQueries) {
 328     static $tableCount = array();
 329
 330     $tempArray = array();
 331     foreach ($tableQueries as $key => $query) {
 332       $table = explode(".", $key);
 333       $table = $table[0];
 334       if (!array_key_exists($table, $tableCount)) {
 335         $query = "SELECT COUNT(*) FROM {$table}";
 336         $tableCount[$table] = CRM_Core_DAO::singleValueQuery($query);
 337       }
 338       $tempArray[$key] = $tableCount[$table];
 339     }
 340
 341     asort($tempArray);
 342     foreach ($tempArray as $key => $count) {
 343       $tempArray[$key] = $tableQueries[$key];
 344     }
 345     $tableQueries = $tempArray;
 346   }
 347
 348   /**
 349    * Return the SQL query for getting only the interesting results out of the dedupe table.
 350    *
 351    * @$checkPermission boolean $params a flag to indicate if permission should be considered.
 352    * default is to always check permissioning but public pages for example might not want
 353    * permission to be checked for anonymous users. Refer CRM-6211. We might be beaking
 354    * Multi-Site dedupe for public pages.
 355    *
 356    * @param bool $checkPermission
 357    *
 358    * @return string
 359    */
 360   public function thresholdQuery($checkPermission = TRUE) {
 361     $this->_aclFrom = '';
 362     // CRM-6603: anonymous dupechecks side-step ACLs
 363     $this->_aclWhere = ' AND is_deleted = 0 ';
 364
 365     if ($this->params && !$this->noRules) {
 366       if ($checkPermission) {
 367         list($this->_aclFrom, $this->_aclWhere) = CRM_Contact_BAO_Contact_Permission::cacheClause('civicrm_contact');
 368         $this->_aclWhere = $this->_aclWhere ? "AND {$this->_aclWhere}" : '';
 369       }
 370       $query = "SELECT dedupe.id1 as id
 371                 FROM dedupe JOIN civicrm_contact ON dedupe.id1 = civicrm_contact.id {$this->_aclFrom}
 372                 WHERE contact_type = '{$this->contact_type}' {$this->_aclWhere}
 373                 AND weight >= {$this->threshold}";
 374     }
 375     else {
 376       $this->_aclWhere = ' AND c1.is_deleted = 0 AND c2.is_deleted = 0';
 377       if ($checkPermission) {
 378         list($this->_aclFrom, $this->_aclWhere) = CRM_Contact_BAO_Contact_Permission::cacheClause(array('c1', 'c2'));
 379         $this->_aclWhere = $this->_aclWhere ? "AND {$this->_aclWhere}" : '';
 380       }
 381       $query = "SELECT dedupe.id1, dedupe.id2, dedupe.weight
 382                 FROM dedupe JOIN civicrm_contact c1 ON dedupe.id1 = c1.id
 383                             JOIN civicrm_contact c2 ON dedupe.id2 = c2.id {$this->_aclFrom}
 384                        LEFT JOIN civicrm_dedupe_exception exc ON dedupe.id1 = exc.contact_id1 AND dedupe.id2 = exc.contact_id2
 385                 WHERE c1.contact_type = '{$this->contact_type}' AND
 386                       c2.contact_type = '{$this->contact_type}' {$this->_aclWhere}
 387                       AND weight >= {$this->threshold} AND exc.contact_id1 IS NULL";
 388     }
 389
 390     CRM_Utils_Hook::dupeQuery($this, 'threshold', $query);
 391     return $query;
 392   }
 393
 394   /**
 395    * find fields related to a rule group.
 396    *
 397    * @param array $params
 398    *
 399    * @return array
 400    *   (rule field => weight) array and threshold associated to rule group
 401    */
 402   public static function dedupeRuleFieldsWeight($params) {
 403     $rgBao = new CRM_Dedupe_BAO_RuleGroup();
 404     $rgBao->contact_type = $params['contact_type'];
 405     if (!empty($params['id'])) {
 406       // accept an ID if provided
 407       $rgBao->id = $params['id'];
 408     }
 409     else {
 410       $rgBao->used = $params['used'];
 411     }
 412     $rgBao->find(TRUE);
 413
 414     $ruleBao = new CRM_Dedupe_BAO_Rule();
 415     $ruleBao->dedupe_rule_group_id = $rgBao->id;
 416     $ruleBao->find();
 417     $ruleFields = array();
 418     while ($ruleBao->fetch()) {
 419       $ruleFields[$ruleBao->rule_field] = $ruleBao->rule_weight;
 420     }
 421
 422     return array($ruleFields, $rgBao->threshold);
 423   }
 424
 425   /**
 426    * Get all of the combinations of fields that would work with a rule.
 427    *
 428    * @param array $rgFields
 429    * @param int $threshold
 430    * @param array $combos
 431    * @param array $running
 432    */
 433   public static function combos($rgFields, $threshold, &$combos, $running = array()) {
 434     foreach ($rgFields as $rgField => $weight) {
 435       unset($rgFields[$rgField]);
 436       $diff = $threshold - $weight;
 437       $runningnow = $running;
 438       $runningnow[] = $rgField;
 439       if ($diff > 0) {
 440         self::combos($rgFields, $diff, $combos, $runningnow);
 441       }
 442       else {
 443         $combos[] = $runningnow;
 444       }
 445     }
 446   }
 447
 448   /**
 449    * Get an array of rule group id to rule group name
 450    * for all th groups for that contactType. If contactType
 451    * not specified, do it for all
 452    *
 453    * @param string $contactType
 454    *   Individual, Household or Organization.
 455    *
 456    *
 457    * @return array
 458    *   id => "nice name" of rule group
 459    */
 460   public static function getByType($contactType = NULL) {
 461     $dao = new CRM_Dedupe_DAO_RuleGroup();
 462
 463     if ($contactType) {
 464       $dao->contact_type = $contactType;
 465     }
 466
 467     $dao->find();
 468     $result = array();
 469     while ($dao->fetch()) {
 470       $title = !empty($dao->title) ? $dao->title : (!empty($dao->name) ? $dao->name : $dao->contact_type);
 471
 472       $name = "$title - {$dao->used}";
 473       $result[$dao->id] = $name;
 474     }
 475     return $result;
 476   }
 477
 478
 479   /**
 480    * Get the cached contact type for a particular rule group.
 481    *
 482    * @param int $rule_group_id
 483    *
 484    * @return string
 485    */
 486   public static function getContactTypeForRuleGroup($rule_group_id) {
 487     if (!isset(\Civi::$statics[__CLASS__]) || !isset(\Civi::$statics[__CLASS__]['rule_groups'])) {
 488       \Civi::$statics[__CLASS__]['rule_groups'] = array();
 489     }
 490     if (empty(\Civi::$statics[__CLASS__]['rule_groups'][$rule_group_id])) {
 491       \Civi::$statics[__CLASS__]['rule_groups'][$rule_group_id]['contact_type'] = CRM_Core_DAO::getFieldValue(
 492         'CRM_Dedupe_DAO_RuleGroup',
 493         $rule_group_id,
 494         'contact_type'
 495       );
 496     }
 497
 498     return \Civi::$statics[__CLASS__]['rule_groups'][$rule_group_id]['contact_type'];
 499   }
 500
 501 }