CRM/Core/Payment/PayPalImpl.php

   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
  28 /**
  29  *
  30  * @package CRM
  31  * @copyright CiviCRM LLC (c) 2004-2015
  32  * $Id$
  33  *
  34  */
  35 class CRM_Core_Payment_PayPalImpl extends CRM_Core_Payment {
  36   const CHARSET = 'iso-8859-1';
  37
  38   protected $_mode = NULL;
  39
  40   /**
  41    * We only need one instance of this object. So we use the singleton
  42    * pattern and cache the instance in this variable
  43    *
  44    * @var object
  45    */
  46   static private $_singleton = NULL;
  47
  48   /**
  49    * Constructor.
  50    *
  51    * @param string $mode
  52    *   The mode of operation: live or test.
  53    *
  54    * @param $paymentProcessor
  55    *
  56    * @return \CRM_Core_Payment_PayPalImpl
  57    */
  58   public function __construct($mode, &$paymentProcessor) {
  59     $this->_mode = $mode;
  60     $this->_paymentProcessor = $paymentProcessor;
  61     $this->_processorName = ts('PayPal Pro');
  62     $paymentProcessorType = CRM_Core_PseudoConstant::paymentProcessorType(FALSE, NULL, 'name');
  63
  64     if ($this->_paymentProcessor['payment_processor_type_id'] == CRM_Utils_Array::key('PayPal_Standard', $paymentProcessorType)) {
  65       $this->_processorName = ts('PayPal Standard');
  66       return;
  67     }
  68     elseif ($this->_paymentProcessor['payment_processor_type_id'] == CRM_Utils_Array::key('PayPal_Express', $paymentProcessorType)) {
  69       $this->_processorName = ts('PayPal Express');
  70     }
  71
  72     if (!$this->_paymentProcessor['user_name']) {
  73       CRM_Core_Error::fatal(ts('Could not find user name for payment processor'));
  74     }
  75   }
  76
  77   /**
  78    * Are back office payments supported - e.g paypal standard won't permit you to enter a credit card associated with someone else's login
  79    * @return bool
  80    */
  81   protected function supportsBackOffice() {
  82     if ($this->_processorName == ts('PayPal Pro')) {
  83       return TRUE;
  84     }
  85     return FALSE;
  86   }
  87
  88   /**
  89    * Can recurring contributions be set against pledges.
  90    *
  91    * In practice all processors that use the baseIPN function to finish transactions or
  92    * call the completetransaction api support this by looking up previous contributions in the
  93    * series and, if there is a prior contribution against a pledge, and the pledge is not complete,
  94    * adding the new payment to the pledge.
  95    *
  96    * However, only enabling for processors it has been tested against.
  97    *
  98    * @return bool
  99    */
 100   protected function supportsRecurContributionsForPledges() {
 101     return TRUE;
 102   }
 103
 104   /**
 105    * Express checkout code. Check PayPal documentation for more information
 106    *
 107    * @param array $params
 108    *   Assoc array of input parameters for this transaction.
 109    *
 110    * @return array
 111    *   the result in an nice formatted array (or an error object)
 112    */
 113   public function setExpressCheckOut(&$params) {
 114     $args = array();
 115
 116     $this->initialize($args, 'SetExpressCheckout');
 117
 118     $args['paymentAction'] = $params['payment_action'];
 119     $args['amt'] = $params['amount'];
 120     $args['currencyCode'] = $params['currencyID'];
 121     $args['desc'] = CRM_Utils_Array::value('description', $params);
 122     $args['invnum'] = $params['invoiceID'];
 123     $args['returnURL'] = $params['returnURL'];
 124     $args['cancelURL'] = $params['cancelURL'];
 125     $args['version'] = '56.0';
 126
 127     //LCD if recurring, collect additional data and set some values
 128     if (!empty($params['is_recur'])) {
 129       $args['L_BILLINGTYPE0'] = 'RecurringPayments';
 130       //$args['L_BILLINGAGREEMENTDESCRIPTION0'] = 'Recurring Contribution';
 131       $args['L_BILLINGAGREEMENTDESCRIPTION0'] = $params['amount'] . " Per " . $params['frequency_interval'] . " " . $params['frequency_unit'];
 132       $args['L_PAYMENTTYPE0'] = 'Any';
 133     }
 134
 135     // Allow further manipulation of the arguments via custom hooks ..
 136     CRM_Utils_Hook::alterPaymentProcessorParams($this, $params, $args);
 137
 138     $result = $this->invokeAPI($args);
 139
 140     if (is_a($result, 'CRM_Core_Error')) {
 141       return $result;
 142     }
 143
 144     /* Success */
 145
 146     return $result['token'];
 147   }
 148
 149   /**
 150    * Get details from paypal. Check PayPal documentation for more information
 151    *
 152    * @param string $token
 153    *   The key associated with this transaction.
 154    *
 155    * @return array
 156    *   the result in an nice formatted array (or an error object)
 157    */
 158   public function getExpressCheckoutDetails($token) {
 159     $args = array();
 160
 161     $this->initialize($args, 'GetExpressCheckoutDetails');
 162     $args['token'] = $token;
 163     // LCD
 164     $args['method'] = 'GetExpressCheckoutDetails';
 165
 166     $result = $this->invokeAPI($args);
 167
 168     if (is_a($result, 'CRM_Core_Error')) {
 169       return $result;
 170     }
 171
 172     /* Success */
 173
 174     $params = array();
 175     $params['token'] = $result['token'];
 176     $params['payer_id'] = $result['payerid'];
 177     $params['payer_status'] = $result['payerstatus'];
 178     $params['first_name'] = $result['firstname'];
 179     $params['middle_name'] = CRM_Utils_Array::value('middlename', $result);
 180     $params['last_name'] = $result['lastname'];
 181     $params['street_address'] = $result['shiptostreet'];
 182     $params['supplemental_address_1'] = CRM_Utils_Array::value('shiptostreet2', $result);
 183     $params['city'] = $result['shiptocity'];
 184     $params['state_province'] = $result['shiptostate'];
 185     $params['postal_code'] = $result['shiptozip'];
 186     $params['country'] = $result['shiptocountrycode'];
 187
 188     return $params;
 189   }
 190
 191   /**
 192    * Do the express checkout at paypal. Check PayPal documentation for more information
 193    *
 194    * @param array $params
 195    *
 196    * @internal param string $token the key associated with this transaction
 197    *
 198    * @return array
 199    *   the result in an nice formatted array (or an error object)
 200    */
 201   public function doExpressCheckout(&$params) {
 202     $args = array();
 203
 204     $this->initialize($args, 'DoExpressCheckoutPayment');
 205
 206     $args['token'] = $params['token'];
 207     $args['paymentAction'] = $params['payment_action'];
 208     $args['amt'] = $params['amount'];
 209     $args['currencyCode'] = $params['currencyID'];
 210     $args['payerID'] = $params['payer_id'];
 211     $args['invnum'] = $params['invoiceID'];
 212     $args['returnURL'] = CRM_Utils_Array::value('returnURL', $params);
 213     $args['cancelURL'] = CRM_Utils_Array::value('cancelURL', $params);
 214     $args['desc'] = $params['description'];
 215
 216     // add CiviCRM BN code
 217     $args['BUTTONSOURCE'] = 'CiviCRM_SP';
 218
 219     $result = $this->invokeAPI($args);
 220
 221     if (is_a($result, 'CRM_Core_Error')) {
 222       return $result;
 223     }
 224
 225     /* Success */
 226
 227     $params['trxn_id'] = $result['transactionid'];
 228     $params['gross_amount'] = $result['amt'];
 229     $params['fee_amount'] = $result['feeamt'];
 230     $params['net_amount'] = CRM_Utils_Array::value('settleamt', $result);
 231     if ($params['net_amount'] == 0 && $params['fee_amount'] != 0) {
 232       $params['net_amount'] = $params['gross_amount'] - $params['fee_amount'];
 233     }
 234     $params['payment_status'] = $result['paymentstatus'];
 235     $params['pending_reason'] = $result['pendingreason'];
 236
 237     return $params;
 238   }
 239
 240   //LCD add new function for handling recurring payments for PayPal Express
 241   /**
 242    * @param array $params
 243    *
 244    * @return mixed
 245    */
 246   public function createRecurringPayments(&$params) {
 247     $args = array();
 248
 249     $this->initialize($args, 'CreateRecurringPaymentsProfile');
 250
 251     $start_time = strtotime(date('m/d/Y'));
 252     $start_date = date('Y-m-d\T00:00:00\Z', $start_time);
 253
 254     $args['token'] = $params['token'];
 255     $args['paymentAction'] = $params['payment_action'];
 256     $args['amt'] = $params['amount'];
 257     $args['currencyCode'] = $params['currencyID'];
 258     $args['payerID'] = $params['payer_id'];
 259     $args['invnum'] = $params['invoiceID'];
 260     $args['returnURL'] = $params['returnURL'];
 261     $args['cancelURL'] = $params['cancelURL'];
 262     $args['profilestartdate'] = $start_date;
 263     $args['method'] = 'CreateRecurringPaymentsProfile';
 264     $args['billingfrequency'] = $params['frequency_interval'];
 265     $args['billingperiod'] = ucwords($params['frequency_unit']);
 266     $args['desc'] = $params['amount'] . " Per " . $params['frequency_interval'] . " " . $params['frequency_unit'];
 267     //$args['desc']           = 'Recurring Contribution';
 268     $args['totalbillingcycles'] = $params['installments'];
 269     $args['version'] = '56.0';
 270     $args['profilereference'] = "i={$params['invoiceID']}" .
 271       "&m=$component" .
 272       "&c={$params['contactID']}" .
 273       "&r={$params['contributionRecurID']}" .
 274       "&b={$params['contributionID']}" .
 275       "&p={$params['contributionPageID']}";
 276
 277     // add CiviCRM BN code
 278     $args['BUTTONSOURCE'] = 'CiviCRM_SP';
 279
 280     $result = $this->invokeAPI($args);
 281
 282     if (is_a($result, 'CRM_Core_Error')) {
 283       return $result;
 284     }
 285
 286     /* Success */
 287     $params['trxn_id'] = $result['transactionid'];
 288     $params['gross_amount'] = $result['amt'];
 289     $params['fee_amount'] = $result['feeamt'];
 290     $params['net_amount'] = $result['settleamt'];
 291     if ($params['net_amount'] == 0 && $params['fee_amount'] != 0) {
 292       $params['net_amount'] = $params['gross_amount'] - $params['fee_amount'];
 293     }
 294     $params['payment_status'] = $result['paymentstatus'];
 295     $params['pending_reason'] = $result['pendingreason'];
 296
 297     return $params;
 298   }
 299   //LCD end
 300   /**
 301    * @param $args
 302    * @param $method
 303    */
 304   public function initialize(&$args, $method) {
 305     $args['user'] = $this->_paymentProcessor['user_name'];
 306     $args['pwd'] = $this->_paymentProcessor['password'];
 307     $args['version'] = 3.0;
 308     $args['signature'] = $this->_paymentProcessor['signature'];
 309     $args['subject'] = CRM_Utils_Array::value('subject', $this->_paymentProcessor);
 310     $args['method'] = $method;
 311   }
 312
 313   /**
 314    * This function collects all the information from a web/api form and invokes
 315    * the relevant payment processor specific functions to perform the transaction
 316    *
 317    * @param array $params
 318    *   Assoc array of input parameters for this transaction.
 319    *
 320    * @param string $component
 321    * @return array
 322    *   the result in an nice formatted array (or an error object)
 323    */
 324   public function doDirectPayment(&$params, $component = 'contribute') {
 325     $args = array();
 326
 327     $this->initialize($args, 'DoDirectPayment');
 328
 329     $args['paymentAction'] = $params['payment_action'];
 330     $args['amt'] = $params['amount'];
 331     $args['currencyCode'] = $params['currencyID'];
 332     $args['invnum'] = $params['invoiceID'];
 333     $args['ipaddress'] = $params['ip_address'];
 334     $args['creditCardType'] = $params['credit_card_type'];
 335     $args['acct'] = $params['credit_card_number'];
 336     $args['expDate'] = sprintf('%02d', $params['month']) . $params['year'];
 337     $args['cvv2'] = $params['cvv2'];
 338     $args['firstName'] = $params['first_name'];
 339     $args['lastName'] = $params['last_name'];
 340     $args['email'] = CRM_Utils_Array::value('email', $params);
 341     $args['street'] = $params['street_address'];
 342     $args['city'] = $params['city'];
 343     $args['state'] = $params['state_province'];
 344     $args['countryCode'] = $params['country'];
 345     $args['zip'] = $params['postal_code'];
 346     $args['desc'] = substr(CRM_Utils_Array::value('description', $params), 0, 127);
 347     $args['custom'] = CRM_Utils_Array::value('accountingCode', $params);
 348
 349     // add CiviCRM BN code
 350     $args['BUTTONSOURCE'] = 'CiviCRM_SP';
 351
 352     if (CRM_Utils_Array::value('is_recur', $params) == 1) {
 353       $start_time = strtotime(date('m/d/Y'));
 354       $start_date = date('Y-m-d\T00:00:00\Z', $start_time);
 355
 356       $args['PaymentAction'] = 'Sale';
 357       $args['billingperiod'] = ucwords($params['frequency_unit']);
 358       $args['billingfrequency'] = $params['frequency_interval'];
 359       $args['method'] = "CreateRecurringPaymentsProfile";
 360       $args['profilestartdate'] = $start_date;
 361       $args['desc'] = "" .
 362         $params['description'] . ": " .
 363         $params['amount'] . " Per " .
 364         $params['frequency_interval'] . " " .
 365         $params['frequency_unit'];
 366       $args['amt'] = $params['amount'];
 367       $args['totalbillingcycles'] = $params['installments'];
 368       $args['version'] = 56.0;
 369       $args['PROFILEREFERENCE'] = "" .
 370         "i=" . $params['invoiceID'] . "&m=" . $component .
 371         "&c=" . $params['contactID'] . "&r=" . $params['contributionRecurID'] .
 372         "&b=" . $params['contributionID'] . "&p=" . $params['contributionPageID'];
 373     }
 374
 375     // Allow further manipulation of the arguments via custom hooks ..
 376     CRM_Utils_Hook::alterPaymentProcessorParams($this, $params, $args);
 377
 378     $result = $this->invokeAPI($args);
 379
 380     //WAG
 381     if (is_a($result, 'CRM_Core_Error')) {
 382       return $result;
 383     }
 384
 385     $params['recurr_profile_id'] = NULL;
 386
 387     if (CRM_Utils_Array::value('is_recur', $params) == 1) {
 388       $params['recurr_profile_id'] = $result['profileid'];
 389     }
 390
 391     /* Success */
 392
 393     $params['trxn_id'] = CRM_Utils_Array::value('transactionid', $result);
 394     $params['gross_amount'] = CRM_Utils_Array::value('amt', $result);
 395     return $params;
 396   }
 397
 398   /**
 399    * This function checks to see if we have the right config values.
 400    *
 401    * @return string
 402    *   the error message if any
 403    */
 404   public function checkConfig() {
 405     $error = array();
 406     $paymentProcessorType = CRM_Core_PseudoConstant::paymentProcessorType(FALSE, NULL, 'name');
 407     if (
 408       $this->_paymentProcessor['payment_processor_type_id'] == CRM_Utils_Array::key('PayPal_Standard', $paymentProcessorType) ||
 409       $this->_paymentProcessor['payment_processor_type_id'] == CRM_Utils_Array::key('PayPal', $paymentProcessorType)
 410     ) {
 411       if (empty($this->_paymentProcessor['user_name'])) {
 412         $error[] = ts('User Name is not set in the Administer &raquo; System Settings &raquo; Payment Processors.');
 413       }
 414     }
 415
 416     if ($this->_paymentProcessor['payment_processor_type_id'] != CRM_Utils_Array::key('PayPal_Standard', $paymentProcessorType)) {
 417       if (empty($this->_paymentProcessor['signature'])) {
 418         $error[] = ts('Signature is not set in the Administer &raquo; System Settings &raquo; Payment Processors.');
 419       }
 420
 421       if (empty($this->_paymentProcessor['password'])) {
 422         $error[] = ts('Password is not set in the Administer &raquo; System Settings &raquo; Payment Processors.');
 423       }
 424     }
 425
 426     if (!empty($error)) {
 427       return implode('<p>', $error);
 428     }
 429     else {
 430       return NULL;
 431     }
 432   }
 433
 434   /**
 435    * @return null|string
 436    */
 437   public function cancelSubscriptionURL() {
 438     if ($this->_paymentProcessor['payment_processor_type'] == 'PayPal_Standard') {
 439       return "{$this->_paymentProcessor['url_site']}cgi-bin/webscr?cmd=_subscr-find&alias=" . urlencode($this->_paymentProcessor['user_name']);
 440     }
 441     else {
 442       return NULL;
 443     }
 444   }
 445
 446   /**
 447    * Check whether a method is present ( & supported ) by the payment processor object.
 448    *
 449    * @param string $method
 450    *   Method to check for.
 451    *
 452    * @return bool
 453    */
 454   public function isSupported($method = 'cancelSubscription') {
 455     if ($this->_paymentProcessor['payment_processor_type'] != 'PayPal') {
 456       // since subscription methods like cancelSubscription or updateBilling is not yet implemented / supported
 457       // by standard or express.
 458       return FALSE;
 459     }
 460     return parent::isSupported($method);
 461   }
 462
 463   /**
 464    * @param string $message
 465    * @param array $params
 466    *
 467    * @return array|bool|object
 468    */
 469   public function cancelSubscription(&$message = '', $params = array()) {
 470     if ($this->_paymentProcessor['payment_processor_type'] == 'PayPal') {
 471       $args = array();
 472       $this->initialize($args, 'ManageRecurringPaymentsProfileStatus');
 473
 474       $args['PROFILEID'] = CRM_Utils_Array::value('subscriptionId', $params);
 475       $args['ACTION'] = 'Cancel';
 476       $args['NOTE'] = CRM_Utils_Array::value('reason', $params);
 477
 478       $result = $this->invokeAPI($args);
 479       if (is_a($result, 'CRM_Core_Error')) {
 480         return $result;
 481       }
 482       $message = "{$result['ack']}: profileid={$result['profileid']}";
 483       return TRUE;
 484     }
 485     return FALSE;
 486   }
 487
 488   /**
 489    * Process incoming notification.
 490    *
 491    * This is only supported for paypal pro at the moment & no specific plans to add this path to core
 492    * for paypal standard as the goal must be to separate the 2.
 493    *
 494    * We don't need to handle paypal standard using this path as there has never been any historic support
 495    * for paypal standard to call civicrm/payment/ipn as a path.
 496    */
 497   static public function handlePaymentNotification() {
 498     $paypalIPN = new CRM_Core_Payment_PayPalProIPN($_REQUEST);
 499     $paypalIPN->main();
 500   }
 501
 502   /**
 503    * @param string $message
 504    * @param array $params
 505    *
 506    * @return array|bool|object
 507    */
 508   public function updateSubscriptionBillingInfo(&$message = '', $params = array()) {
 509     if ($this->_paymentProcessor['payment_processor_type'] == 'PayPal') {
 510       $config = CRM_Core_Config::singleton();
 511       $args = array();
 512       $this->initialize($args, 'UpdateRecurringPaymentsProfile');
 513
 514       $args['PROFILEID'] = $params['subscriptionId'];
 515       $args['AMT'] = $params['amount'];
 516       $args['CURRENCYCODE'] = $config->defaultCurrency;
 517       $args['CREDITCARDTYPE'] = $params['credit_card_type'];
 518       $args['ACCT'] = $params['credit_card_number'];
 519       $args['EXPDATE'] = sprintf('%02d', $params['month']) . $params['year'];
 520       $args['CVV2'] = $params['cvv2'];
 521
 522       $args['FIRSTNAME'] = $params['first_name'];
 523       $args['LASTNAME'] = $params['last_name'];
 524       $args['STREET'] = $params['street_address'];
 525       $args['CITY'] = $params['city'];
 526       $args['STATE'] = $params['state_province'];
 527       $args['COUNTRYCODE'] = $params['postal_code'];
 528       $args['ZIP'] = $params['country'];
 529
 530       $result = $this->invokeAPI($args);
 531       if (is_a($result, 'CRM_Core_Error')) {
 532         return $result;
 533       }
 534       $message = "{$result['ack']}: profileid={$result['profileid']}";
 535       return TRUE;
 536     }
 537     return FALSE;
 538   }
 539
 540   /**
 541    * @param string $message
 542    * @param array $params
 543    *
 544    * @return array|bool|object
 545    */
 546   public function changeSubscriptionAmount(&$message = '', $params = array()) {
 547     if ($this->_paymentProcessor['payment_processor_type'] == 'PayPal') {
 548       $config = CRM_Core_Config::singleton();
 549       $args = array();
 550       $this->initialize($args, 'UpdateRecurringPaymentsProfile');
 551
 552       $args['PROFILEID'] = $params['subscriptionId'];
 553       $args['AMT'] = $params['amount'];
 554       $args['CURRENCYCODE'] = $config->defaultCurrency;
 555       $args['BILLINGFREQUENCY'] = $params['installments'];
 556
 557       $result = $this->invokeAPI($args);
 558       CRM_Core_Error::debug_var('$result', $result);
 559       if (is_a($result, 'CRM_Core_Error')) {
 560         return $result;
 561       }
 562       $message = "{$result['ack']}: profileid={$result['profileid']}";
 563       return TRUE;
 564     }
 565     return FALSE;
 566   }
 567
 568   /**
 569    * @param array $params
 570    * @param string $component
 571    *
 572    * @throws Exception
 573    */
 574   public function doTransferCheckout(&$params, $component = 'contribute') {
 575     $config = CRM_Core_Config::singleton();
 576
 577     if ($component != 'contribute' && $component != 'event') {
 578       CRM_Core_Error::fatal(ts('Component is invalid'));
 579     }
 580
 581     $notifyURL = $config->userFrameworkResourceURL . "extern/ipn.php?reset=1&contactID={$params['contactID']}" . "&contributionID={$params['contributionID']}" . "&module={$component}";
 582
 583     if ($component == 'event') {
 584       $notifyURL .= "&eventID={$params['eventID']}&participantID={$params['participantID']}";
 585     }
 586     else {
 587       $membershipID = CRM_Utils_Array::value('membershipID', $params);
 588       if ($membershipID) {
 589         $notifyURL .= "&membershipID=$membershipID";
 590       }
 591       $relatedContactID = CRM_Utils_Array::value('related_contact', $params);
 592       if ($relatedContactID) {
 593         $notifyURL .= "&relatedContactID=$relatedContactID";
 594
 595         $onBehalfDupeAlert = CRM_Utils_Array::value('onbehalf_dupe_alert', $params);
 596         if ($onBehalfDupeAlert) {
 597           $notifyURL .= "&onBehalfDupeAlert=$onBehalfDupeAlert";
 598         }
 599       }
 600     }
 601
 602     $url = ($component == 'event') ? 'civicrm/event/register' : 'civicrm/contribute/transact';
 603     $cancel = ($component == 'event') ? '_qf_Register_display' : '_qf_Main_display';
 604     $returnURL = CRM_Utils_System::url($url,
 605       "_qf_ThankYou_display=1&qfKey={$params['qfKey']}",
 606       TRUE, NULL, FALSE
 607     );
 608
 609     $cancelUrlString = "$cancel=1&cancel=1&qfKey={$params['qfKey']}";
 610     if (!empty($params['is_recur'])) {
 611       $cancelUrlString .= "&isRecur=1&recurId={$params['contributionRecurID']}&contribId={$params['contributionID']}";
 612     }
 613
 614     $cancelURL = CRM_Utils_System::url(
 615       $url,
 616       $cancelUrlString,
 617       TRUE, NULL, FALSE
 618     );
 619
 620     // ensure that the returnURL is absolute.
 621     if (substr($returnURL, 0, 4) != 'http') {
 622       $fixUrl = CRM_Utils_System::url("civicrm/admin/setting/url", '&reset=1');
 623       CRM_Core_Error::fatal(ts('Sending a relative URL to PayPalIPN is erroneous. Please make your resource URL (in <a href="%1">Administer &raquo; System Settings &raquo; Resource URLs</a> ) complete.', array(1 => $fixUrl)));
 624     }
 625
 626     $paypalParams = array(
 627       'business' => $this->_paymentProcessor['user_name'],
 628       'notify_url' => $notifyURL,
 629       'item_name' => $params['item_name'],
 630       'quantity' => 1,
 631       'undefined_quantity' => 0,
 632       'cancel_return' => $cancelURL,
 633       'no_note' => 1,
 634       'no_shipping' => 1,
 635       'return' => $returnURL,
 636       'rm' => 2,
 637       'currency_code' => $params['currencyID'],
 638       'invoice' => $params['invoiceID'],
 639       'lc' => substr($config->lcMessages, -2),
 640       'charset' => function_exists('mb_internal_encoding') ? mb_internal_encoding() : 'UTF-8',
 641       'custom' => CRM_Utils_Array::value('accountingCode', $params),
 642       'bn' => 'CiviCRM_SP',
 643     );
 644
 645     // add name and address if available, CRM-3130
 646     $otherVars = array(
 647       'first_name' => 'first_name',
 648       'last_name' => 'last_name',
 649       'street_address' => 'address1',
 650       'country' => 'country',
 651       'preferred_language' => 'lc',
 652       'city' => 'city',
 653       'state_province' => 'state',
 654       'postal_code' => 'zip',
 655       'email' => 'email',
 656     );
 657
 658     foreach (array_keys($params) as $p) {
 659       // get the base name without the location type suffixed to it
 660       $parts = explode('-', $p);
 661       $name = count($parts) > 1 ? $parts[0] : $p;
 662       if (isset($otherVars[$name])) {
 663         $value = $params[$p];
 664         if ($value) {
 665           if ($name == 'state_province') {
 666             $stateName = CRM_Core_PseudoConstant::stateProvinceAbbreviation($value);
 667             $value = $stateName;
 668           }
 669           if ($name == 'country') {
 670             $countryName = CRM_Core_PseudoConstant::countryIsoCode($value);
 671             $value = $countryName;
 672           }
 673           // ensure value is not an array
 674           // CRM-4174
 675           if (!is_array($value)) {
 676             $paypalParams[$otherVars[$name]] = $value;
 677           }
 678         }
 679       }
 680     }
 681
 682     // if recurring donations, add a few more items
 683     if (!empty($params['is_recur'])) {
 684       if ($params['contributionRecurID']) {
 685         $notifyURL .= "&contributionRecurID={$params['contributionRecurID']}&contributionPageID={$params['contributionPageID']}";
 686         $paypalParams['notify_url'] = $notifyURL;
 687       }
 688       else {
 689         CRM_Core_Error::fatal(ts('Recurring contribution, but no database id'));
 690       }
 691
 692       $paypalParams += array(
 693         'cmd' => '_xclick-subscriptions',
 694         'a3' => $params['amount'],
 695         'p3' => $params['frequency_interval'],
 696         't3' => ucfirst(substr($params['frequency_unit'], 0, 1)),
 697         'src' => 1,
 698         'sra' => 1,
 699         'srt' => CRM_Utils_Array::value('installments', $params),
 700         'no_note' => 1,
 701         'modify' => 0,
 702       );
 703     }
 704     else {
 705       $paypalParams += array(
 706         'cmd' => '_xclick',
 707         'amount' => $params['amount'],
 708       );
 709     }
 710
 711     // Allow further manipulation of the arguments via custom hooks ..
 712     CRM_Utils_Hook::alterPaymentProcessorParams($this, $params, $paypalParams);
 713
 714     $uri = '';
 715     foreach ($paypalParams as $key => $value) {
 716       if ($value === NULL) {
 717         continue;
 718       }
 719
 720       $value = urlencode($value);
 721       if ($key == 'return' ||
 722         $key == 'cancel_return' ||
 723         $key == 'notify_url'
 724       ) {
 725         $value = str_replace('%2F', '/', $value);
 726       }
 727       $uri .= "&{$key}={$value}";
 728     }
 729
 730     $uri = substr($uri, 1);
 731     $url = $this->_paymentProcessor['url_site'];
 732     $sub = empty($params['is_recur']) ? 'cgi-bin/webscr' : 'subscriptions';
 733     $paypalURL = "{$url}{$sub}?$uri";
 734
 735     CRM_Utils_System::redirect($paypalURL);
 736   }
 737
 738   /**
 739    * Hash_call: Function to perform the API call to PayPal using API signature
 740    * @methodName is name of API  method.
 741    * @nvpStr is nvp string.
 742    * returns an associtive array containing the response from the server.
 743    */
 744   public function invokeAPI($args, $url = NULL) {
 745
 746     if ($url === NULL) {
 747       if (empty($this->_paymentProcessor['url_api'])) {
 748         CRM_Core_Error::fatal(ts('Please set the API URL. Please refer to the documentation for more details'));
 749       }
 750
 751       $url = $this->_paymentProcessor['url_api'] . 'nvp';
 752     }
 753
 754     if (!function_exists('curl_init')) {
 755       CRM_Core_Error::fatal("curl functions NOT available.");
 756     }
 757
 758     //setting the curl parameters.
 759     $ch = curl_init();
 760     curl_setopt($ch, CURLOPT_URL, $url);
 761     curl_setopt($ch, CURLOPT_VERBOSE, 1);
 762
 763     //turning off the server and peer verification(TrustManager Concept).
 764     curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, CRM_Core_BAO_Setting::getItem(CRM_Core_BAO_Setting::SYSTEM_PREFERENCES_NAME, 'verifySSL'));
 765     curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, CRM_Core_BAO_Setting::getItem(CRM_Core_BAO_Setting::SYSTEM_PREFERENCES_NAME, 'verifySSL') ? 2 : 0);
 766
 767     curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
 768     curl_setopt($ch, CURLOPT_POST, 1);
 769
 770     $p = array();
 771     foreach ($args as $n => $v) {
 772       $p[] = "$n=" . urlencode($v);
 773     }
 774
 775     //NVPRequest for submitting to server
 776     $nvpreq = implode('&', $p);
 777
 778     //setting the nvpreq as POST FIELD to curl
 779     curl_setopt($ch, CURLOPT_POSTFIELDS, $nvpreq);
 780
 781     //getting response from server
 782     $response = curl_exec($ch);
 783
 784     //converting NVPResponse to an Associative Array
 785     $result = self::deformat($response);
 786
 787     if (curl_errno($ch)) {
 788       $e = CRM_Core_Error::singleton();
 789       $e->push(curl_errno($ch),
 790         0, NULL,
 791         curl_error($ch)
 792       );
 793       return $e;
 794     }
 795     else {
 796       curl_close($ch);
 797     }
 798
 799     if (strtolower($result['ack']) != 'success' &&
 800       strtolower($result['ack']) != 'successwithwarning'
 801     ) {
 802       $e = CRM_Core_Error::singleton();
 803       $e->push($result['l_errorcode0'],
 804         0, NULL,
 805         "{$result['l_shortmessage0']} {$result['l_longmessage0']}"
 806       );
 807       return $e;
 808     }
 809
 810     return $result;
 811   }
 812
 813   /**
 814    * This function will take NVPString and convert it to an Associative Array and it will decode the response.
 815    * It is usefull to search for a particular key and displaying arrays.
 816    * @nvpstr is NVPString.
 817    * @nvpArray is Associative Array.
 818    */
 819   public static function deformat($str) {
 820     $result = array();
 821
 822     while (strlen($str)) {
 823       // postion of key
 824       $keyPos = strpos($str, '=');
 825
 826       // position of value
 827       $valPos = strpos($str, '&') ? strpos($str, '&') : strlen($str);
 828
 829       /*getting the Key and Value values and storing in a Associative Array*/
 830
 831       $key = substr($str, 0, $keyPos);
 832       $val = substr($str, $keyPos + 1, $valPos - $keyPos - 1);
 833
 834       //decoding the respose
 835       $result[strtolower(urldecode($key))] = urldecode($val);
 836       $str = substr($str, $valPos + 1, strlen($str));
 837     }
 838
 839     return $result;
 840   }
 841
 842 }