CRM/Contact/BAO/ProximityQuery.php

   1 <?php
   2 /*
   3  +--------------------------------------------------------------------+
   4  | CiviCRM version 4.6                                                |
   5  +--------------------------------------------------------------------+
   6  | Copyright CiviCRM LLC (c) 2004-2014                                |
   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
  28 /**
  29  *
  30  * @package CRM
  31  * @copyright CiviCRM LLC (c) 2004-2014
  32  * $Id$
  33  *
  34  */
  35 class CRM_Contact_BAO_ProximityQuery {
  36
  37   /**
  38    * Trigonometry for calculating geographical distances.
  39    *
  40    * Modification made in: CRM-13904
  41    * http://en.wikipedia.org/wiki/Great-circle_distance
  42    * http://www.movable-type.co.uk/scripts/latlong.html
  43    *
  44    * All function arguments and return values measure distances in metres
  45    * and angles in degrees.  The ellipsoid model is from the WGS-84 datum.
  46    * Ka-Ping Yee, 2003-08-11
  47    * earth_radius_semimajor = 6378137.0;
  48    * earth_flattening = 1/298.257223563;
  49    * earth_radius_semiminor = $earth_radius_semimajor * (1 - $earth_flattening);
  50    * earth_eccentricity_sq = 2*$earth_flattening - pow($earth_flattening, 2);
  51    * This library is an implementation of UCB CS graduate student, Ka-Ping Yee (http://www.zesty.ca).
  52    * This version has been taken from Drupal's location module: http://drupal.org/project/location
  53    **/
  54
  55   static protected $_earthFlattening;
  56   static protected $_earthRadiusSemiMinor;
  57   static protected $_earthRadiusSemiMajor;
  58   static protected $_earthEccentricitySQ;
  59
  60   public static function initialize() {
  61     static $_initialized = FALSE;
  62
  63     if (!$_initialized) {
  64       $_initialized = TRUE;
  65
  66       self::$_earthFlattening = 1.0 / 298.257223563;
  67       self::$_earthRadiusSemiMajor = 6378137.0;
  68       self::$_earthRadiusSemiMinor = self::$_earthRadiusSemiMajor * (1.0 - self::$_earthFlattening);
  69       self::$_earthEccentricitySQ = 2 * self::$_earthFlattening - pow(self::$_earthFlattening, 2);
  70     }
  71   }
  72
  73   /*
  74    * Latitudes in all of U. S.: from -7.2 (American Samoa) to 70.5 (Alaska).
  75    * Latitudes in continental U. S.: from 24.6 (Florida) to 49.0 (Washington).
  76    * Average latitude of all U. S. zipcodes: 37.9.
  77    */
  78
  79   /**
  80    * Estimate the Earth's radius at a given latitude.
  81    * Default to an approximate average radius for the United States.
  82    *
  83    * @param float $latitude
  84    * @return float
  85    */
  86   public static function earthRadius($latitude) {
  87     $lat = deg2rad($latitude);
  88
  89     $x = cos($lat) / self::$_earthRadiusSemiMajor;
  90     $y = sin($lat) / self::$_earthRadiusSemiMinor;
  91     return 1.0 / sqrt($x * $x + $y * $y);
  92   }
  93
  94   /**
  95    * Convert longitude and latitude to earth-centered earth-fixed coordinates.
  96    * X axis is 0 long, 0 lat; Y axis is 90 deg E; Z axis is north pole.
  97    *
  98    * @param float $longitude
  99    * @param float $latitude
 100    * @param float $height
 101    * @return array
 102    */
 103   public static function earthXYZ($longitude, $latitude, $height = 0) {
 104     $long = deg2rad($longitude);
 105     $lat = deg2rad($latitude);
 106
 107     $cosLong = cos($long);
 108     $cosLat = cos($lat);
 109     $sinLong = sin($long);
 110     $sinLat = sin($lat);
 111
 112     $radius = self::$_earthRadiusSemiMajor / sqrt(1 - self::$_earthEccentricitySQ * $sinLat * $sinLat);
 113
 114     $x = ($radius + $height) * $cosLat * $cosLong;
 115     $y = ($radius + $height) * $cosLat * $sinLong;
 116     $z = ($radius * (1 - self::$_earthEccentricitySQ) + $height) * $sinLat;
 117
 118     return array($x, $y, $z);
 119   }
 120
 121   /**
 122    * Convert a given angle to earth-surface distance.
 123    *
 124    * @param float $angle
 125    * @param float $latitude
 126    * @return float
 127    */
 128   public static function earthArcLength($angle, $latitude) {
 129     return deg2rad($angle) * self::earthRadius($latitude);
 130   }
 131
 132   /**
 133    * Estimate the min and max longitudes within $distance of a given location.
 134    *
 135    * @param float $longitude
 136    * @param float $latitude
 137    * @param float $distance
 138    * @return array
 139    */
 140   public static function earthLongitudeRange($longitude, $latitude, $distance) {
 141     $long = deg2rad($longitude);
 142     $lat = deg2rad($latitude);
 143     $radius = self::earthRadius($latitude);
 144
 145     $angle = $distance / $radius;
 146     $diff = asin(sin($angle) / cos($lat));
 147     $minLong = $long - $diff;
 148     $maxLong = $long + $diff;
 149
 150     if ($minLong < -pi()) {
 151       $minLong = $minLong + pi() * 2;
 152     }
 153
 154     if ($maxLong > pi()) {
 155       $maxLong = $maxLong - pi() * 2;
 156     }
 157
 158     return array(
 159       rad2deg($minLong),
 160       rad2deg($maxLong),
 161     );
 162   }
 163
 164   /**
 165    * Estimate the min and max latitudes within $distance of a given location.
 166    *
 167    * @param float $longitude
 168    * @param float $latitude
 169    * @param float $distance
 170    * @return array
 171    */
 172   public static function earthLatitudeRange($longitude, $latitude, $distance) {
 173     $long = deg2rad($longitude);
 174     $lat = deg2rad($latitude);
 175     $radius = self::earthRadius($latitude);
 176
 177     $angle = $distance / $radius;
 178     $minLat = $lat - $angle;
 179     $maxLat = $lat + $angle;
 180     $rightangle = pi() / 2.0;
 181
 182     // wrapped around the south pole
 183     if ($minLat < -$rightangle) {
 184       $overshoot = -$minLat - $rightangle;
 185       $minLat = -$rightangle + $overshoot;
 186       if ($minLat > $maxLat) {
 187         $maxLat = $minLat;
 188       }
 189       $minLat = -$rightangle;
 190     }
 191
 192     // wrapped around the north pole
 193     if ($maxLat > $rightangle) {
 194       $overshoot = $maxLat - $rightangle;
 195       $maxLat = $rightangle - $overshoot;
 196       if ($maxLat < $minLat) {
 197         $minLat = $maxLat;
 198       }
 199       $maxLat = $rightangle;
 200     }
 201
 202     return array(
 203       rad2deg($minLat),
 204       rad2deg($maxLat),
 205     );
 206   }
 207
 208   /**
 209    * @param float $longitude
 210    * @param float $latitude
 211    * @param float $distance
 212    * @param string $tablePrefix
 213    *
 214    * @return string
 215    */
 216   public static function where($latitude, $longitude, $distance, $tablePrefix = 'civicrm_address') {
 217     self::initialize();
 218
 219     $params = array();
 220     $clause = array();
 221
 222     list($minLongitude, $maxLongitude) =
 223       self::earthLongitudeRange($longitude,
 224         $latitude,
 225         $distance
 226       );
 227     list($minLatitude, $maxLatitude) =
 228       self::earthLatitudeRange(
 229         $longitude,
 230         $latitude,
 231         $distance
 232       );
 233
 234     // DONT consider NAN values (which is returned by rad2deg php function)
 235     // for checking BETWEEN geo_code's criteria as it throws obvious 'NAN' field not found DB: Error
 236     $geoCodeWhere = array();
 237     if (!is_nan($minLatitude)) {
 238       $geoCodeWhere[] = "{$tablePrefix}.geo_code_1  >= $minLatitude ";
 239     }
 240     if (!is_nan($maxLatitude)) {
 241       $geoCodeWhere[] = "{$tablePrefix}.geo_code_1  <= $maxLatitude ";
 242     }
 243     if (!is_nan($minLongitude)) {
 244       $geoCodeWhere[] = "{$tablePrefix}.geo_code_2 >= $minLongitude ";
 245     }
 246     if (!is_nan($maxLongitude)) {
 247       $geoCodeWhere[] = "{$tablePrefix}.geo_code_2 <= $maxLongitude ";
 248     }
 249     $geoCodeWhereClause = implode(' AND ', $geoCodeWhere);
 250
 251     $where = "
 252 {$geoCodeWhereClause} AND
 253 ACOS(
 254     COS(RADIANS({$tablePrefix}.geo_code_1)) *
 255     COS(RADIANS($latitude)) *
 256     COS(RADIANS({$tablePrefix}.geo_code_2) - RADIANS($longitude)) +
 257     SIN(RADIANS({$tablePrefix}.geo_code_1)) *
 258     SIN(RADIANS($latitude))
 259   ) * 6378137  <= $distance
 260 ";
 261     return $where;
 262   }
 263
 264   /**
 265    * @param $query
 266    * @param array $values
 267    *
 268    * @throws Exception
 269    */
 270   public static function process(&$query, &$values) {
 271     list($name, $op, $distance, $grouping, $wildcard) = $values;
 272
 273     // also get values array for all address related info
 274     $proximityVars = array(
 275       'street_address' => 1,
 276       'city' => 1,
 277       'postal_code' => 1,
 278       'state_province_id' => 0,
 279       'country_id' => 0,
 280       'state_province' => 0,
 281       'country' => 0,
 282       'distance_unit' => 0,
 283     );
 284
 285     $proximityAddress = array();
 286     $qill = array();
 287     foreach ($proximityVars as $var => $recordQill) {
 288       $proximityValues = $query->getWhereValues("prox_{$var}", $grouping);
 289       if (!empty($proximityValues) &&
 290         !empty($proximityValues[2])
 291       ) {
 292         $proximityAddress[$var] = $proximityValues[2];
 293         if ($recordQill) {
 294           $qill[] = $proximityValues[2];
 295         }
 296       }
 297     }
 298
 299     if (empty($proximityAddress)) {
 300       return;
 301     }
 302
 303     if (isset($proximityAddress['state_province_id'])) {
 304       $proximityAddress['state_province'] = CRM_Core_PseudoConstant::stateProvince($proximityAddress['state_province_id']);
 305       $qill[] = $proximityAddress['state_province'];
 306     }
 307
 308     $config = CRM_Core_Config::singleton();
 309     if (!isset($proximityAddress['country_id'])) {
 310       // get it from state if state is present
 311       if (isset($proximityAddress['state_province_id'])) {
 312         $proximityAddress['country_id'] = CRM_Core_PseudoConstant::countryIDForStateID($proximityAddress['state_province_id']);
 313       }
 314       elseif (isset($config->defaultContactCountry)) {
 315         $proximityAddress['country_id'] = $config->defaultContactCountry;
 316       }
 317     }
 318
 319     if (isset($proximityAddress['country_id'])) {
 320       $proximityAddress['country'] = CRM_Core_PseudoConstant::country($proximityAddress['country_id']);
 321       $qill[] = $proximityAddress['country'];
 322     }
 323
 324
 325     if (
 326       isset($proximityAddress['distance_unit']) &&
 327       $proximityAddress['distance_unit'] == 'miles'
 328     ) {
 329       $qillUnits = " {$distance} " . ts('miles');
 330       $distance = $distance * 1609.344;
 331     }
 332     else {
 333       $qillUnits = " {$distance} " . ts('km');
 334       $distance = $distance * 1000.00;
 335     }
 336
 337     $qill = ts('Proximity search to a distance of %1 from %2',
 338       array(
 339         1 => $qillUnits,
 340         2 => implode(', ', $qill),
 341       )
 342     );
 343
 344     $fnName = isset($config->geocodeMethod) ? $config->geocodeMethod : NULL;
 345     if (empty($fnName)) {
 346       CRM_Core_Error::fatal(ts('Proximity searching requires you to set a valid geocoding provider'));
 347     }
 348
 349     $query->_tables['civicrm_address'] = $query->_whereTables['civicrm_address'] = 1;
 350
 351     require_once str_replace('_', DIRECTORY_SEPARATOR, $fnName) . '.php';
 352     $fnName::format($proximityAddress);
 353     if (
 354       !is_numeric(CRM_Utils_Array::value('geo_code_1', $proximityAddress)) ||
 355       !is_numeric(CRM_Utils_Array::value('geo_code_2', $proximityAddress))
 356     ) {
 357       // we are setting the where clause to 0 here, so we wont return anything
 358       $qill .= ': ' . ts('We could not geocode the destination address.');
 359       $query->_qill[$grouping][] = $qill;
 360       $query->_where[$grouping][] = ' (0) ';
 361       return;
 362     }
 363
 364     $query->_qill[$grouping][] = $qill;
 365     $query->_where[$grouping][] = self::where(
 366       $proximityAddress['geo_code_1'],
 367       $proximityAddress['geo_code_2'],
 368       $distance
 369     );
 370
 371     return;
 372   }
 373
 374   /**
 375    * @param array $input
 376    */
 377   public static function fixInputParams(&$input) {
 378     foreach ($input as $param) {
 379       if (CRM_Utils_Array::value('0', $param) == 'prox_distance') {
 380         // add prox_ prefix to these
 381         $param_alter = array('street_address', 'city', 'postal_code', 'state_province', 'country');
 382
 383         foreach ($input as $key => $_param) {
 384           if (in_array($_param[0], $param_alter)) {
 385             $input[$key][0] = 'prox_' . $_param[0];
 386
 387             // _id suffix where needed
 388             if ($_param[0] == 'country' || $_param[0] == 'state_province') {
 389               $input[$key][0] .= '_id';
 390
 391               // flatten state_province array
 392               if (is_array($input[$key][2])) {
 393                 $input[$key][2] = $input[$key][2][0];
 394               }
 395             }
 396           }
 397         }
 398         return;
 399       }
 400     }
 401   }
 402 }