<?php
/*
 +--------------------------------------------------------------------+
 | CiviCRM version 4.7                                                |
 +--------------------------------------------------------------------+
 | Copyright CiviCRM LLC (c) 2004-2016                                |
 +--------------------------------------------------------------------+
 | This file is a part of CiviCRM.                                    |
 |                                                                    |
 | CiviCRM is free software; you can copy, modify, and distribute it  |
 | under the terms of the GNU Affero General Public License           |
 | Version 3, 19 November 2007 and the CiviCRM Licensing Exception.   |
 |                                                                    |
 | CiviCRM is distributed in the hope that it will be useful, but     |
 | WITHOUT ANY WARRANTY; without even the implied warranty of         |
 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.               |
 | See the GNU Affero General Public License for more details.        |
 |                                                                    |
 | You should have received a copy of the GNU Affero General Public   |
 | License and the CiviCRM Licensing Exception along                  |
 | with this program; if not, contact CiviCRM LLC                     |
 | at info[AT]civicrm[DOT]org. If you have questions about the        |
 | GNU Affero General Public License or the licensing of CiviCRM,     |
 | see the CiviCRM license FAQ at http://civicrm.org/licensing        |
 +--------------------------------------------------------------------+
 */

/**
 *
 * @package CRM
 * @copyright CiviCRM LLC (c) 2004-2016
 */

/**
 * This class provides the common functionality for sending email to
 * one or a group of contact ids. This class is reused by all the search
 * components in CiviCRM (since they all have send email as a task)
 */
class CRM_Contact_Form_Task_EmailCommon {
  const MAX_EMAILS_KILL_SWITCH = 50;

  public $_contactDetails = array();
  public $_allContactDetails = array();
  public $_toContactEmails = array();

  /**
   * @param CRM_Core_Form $form
   */
  public static function preProcessFromAddress(&$form) {
    $form->_single = FALSE;
    $className = CRM_Utils_System::getClassName($form);
    if (property_exists($form, '_context') &&
      $form->_context != 'search' &&
      $className == 'CRM_Contact_Form_Task_Email'
    ) {
      $form->_single = TRUE;
    }

    $form->_emails = $emails = array();

    $session = CRM_Core_Session::singleton();
    $contactID = $session->get('userID');

    $form->_contactIds = array($contactID);
    $contactEmails = CRM_Core_BAO_Email::allEmails($contactID);

    $form->_onHold = array();

    $fromDisplayName = CRM_Core_DAO::getFieldValue('CRM_Contact_DAO_Contact',
      $contactID, 'display_name'
    );

    foreach ($contactEmails as $emailId => $item) {
      $email = $item['email'];
      if (!$email && (count($emails) < 1)) {
        // set it if no emails are present at all
        $form->_noEmails = TRUE;
      }
      else {
        if ($email) {
          if (in_array($email, $emails)) {
            // CRM-3624
            continue;
          }

          $emails[$emailId] = '"' . $fromDisplayName . '" <' . $email . '> ';
          $form->_onHold[$emailId] = $item['on_hold'];
          $form->_noEmails = FALSE;
        }
      }

      $form->_emails[$emailId] = $emails[$emailId];
      $emails[$emailId] .= $item['locationType'];

      if ($item['is_primary']) {
        $emails[$emailId] .= ' ' . ts('(preferred)');
      }
      $emails[$emailId] = htmlspecialchars($emails[$emailId]);
    }

    $form->assign('noEmails', $form->_noEmails);

    if ($form->_noEmails) {
      CRM_Core_Error::statusBounce(ts('Your user record does not have a valid email address'));
    }

    // now add domain from addresses
    $domainEmails = array();
    $domainFrom = CRM_Core_OptionGroup::values('from_email_address');
    foreach (array_keys($domainFrom) as $k) {
      $domainEmail = $domainFrom[$k];
      $domainEmails[$domainEmail] = htmlspecialchars($domainEmail);
      $form->_emails[$domainEmail] = $domainEmail;
    }

    $form->_fromEmails = CRM_Utils_Array::crmArrayMerge($emails, $domainEmails);

    // Add signature
    $defaultEmail = civicrm_api3('email', 'getsingle', array('id' => key($form->_fromEmails)));
    $defaults = array();
    if (!empty($defaultEmail['signature_html'])) {
      $defaults['html_message'] = '<br/><br/>--' . $defaultEmail['signature_html'];
    }
    if (!empty($defaultEmail['signature_text'])) {
      $defaults['text_message'] = "\n\n--\n" . $defaultEmail['signature_text'];
    }
    $form->setDefaults($defaults);
  }

  /**
   * Build the form object.
   *
   * @param CRM_Core_Form $form
   */
  public static function buildQuickForm(&$form) {
    $toArray = $ccArray = $bccArray = array();
    $suppressedEmails = 0;
    //here we are getting logged in user id as array but we need target contact id. CRM-5988
    $cid = $form->get('cid');
    if ($cid) {
      $form->_contactIds = explode(',', $cid);
    }
    if (count($form->_contactIds) > 1) {
      $form->_single = FALSE;
    }

    $emailAttributes = array(
      'class' => 'huge',
    );
    $to = $form->add('text', 'to', ts('To'), $emailAttributes, TRUE);
    $cc = $form->add('text', 'cc_id', ts('CC'), $emailAttributes);
    $bcc = $form->add('text', 'bcc_id', ts('BCC'), $emailAttributes);

    $setDefaults = TRUE;
    if (property_exists($form, '_context') && $form->_context == 'standalone') {
      $setDefaults = FALSE;
    }

    $elements = array('to', 'cc', 'bcc');
    $form->_allContactIds = $form->_toContactIds = $form->_contactIds;
    foreach ($elements as $element) {
      if ($$element->getValue()) {
        $allEmails = explode(',', $$element->getValue());
        if ($element == 'to') {
          $form->_toContactIds = $form->_contactIds = array();
        }

        foreach ($allEmails as $value) {
          list($contactId, $email) = explode('::', $value);
          if ($contactId) {
            switch ($element) {
              case 'to':
                $form->_contactIds[] = $form->_toContactIds[] = $contactId;
                $form->_toContactEmails[] = $email;
                break;

              case 'cc':
                $form->_ccContactIds[] = $contactId;
                break;

              case 'bcc':
                $form->_bccContactIds[] = $contactId;
                break;
            }

            $form->_allContactIds[] = $contactId;
          }
        }

        $setDefaults = TRUE;
      }
    }

    //get the group of contacts as per selected by user in case of Find Activities
    if (!empty($form->_activityHolderIds)) {
      $contact = $form->get('contacts');
      $form->_allContactIds = $form->_contactIds = $contact;
    }

    // check if we need to setdefaults and check for valid contact emails / communication preferences
    if (is_array($form->_allContactIds) && $setDefaults) {
      $returnProperties = array(
        'sort_name' => 1,
        'email' => 1,
        'do_not_email' => 1,
        'is_deceased' => 1,
        'on_hold' => 1,
        'display_name' => 1,
        'preferred_mail_format' => 1,
      );

      // get the details for all selected contacts ( to, cc and bcc contacts )
      list($form->_contactDetails) = CRM_Utils_Token::getTokenDetails($form->_allContactIds,
        $returnProperties,
        FALSE,
        FALSE
      );

      // make a copy of all contact details
      $form->_allContactDetails = $form->_contactDetails;

      // perform all validations
      foreach ($form->_allContactIds as $key => $contactId) {
        $value = $form->_contactDetails[$contactId];
        if ($value['do_not_email'] || empty($value['email']) || !empty($value['is_deceased']) || $value['on_hold']) {
          $suppressedEmails++;

          // unset contact details for contacts that we won't be sending email. This is prevent extra computation
          // during token evaluation etc.
          unset($form->_contactDetails[$contactId]);
        }
        else {
          $email = $value['email'];

          // build array's which are used to setdefaults
          if (in_array($contactId, $form->_toContactIds)) {
            $form->_toContactDetails[$contactId] = $form->_contactDetails[$contactId];
            // If a particular address has been specified as the default, use that instead of contact's primary email
            if (!empty($form->_toEmail) && $form->_toEmail['contact_id'] == $contactId) {
              $email = $form->_toEmail['email'];
            }
            $toArray[] = array(
              'text' => '"' . $value['sort_name'] . '" <' . $email . '>',
              'id' => "$contactId::{$email}",
            );
          }
          elseif (in_array($contactId, $form->_ccContactIds)) {
            $ccArray[] = array(
              'text' => '"' . $value['sort_name'] . '" <' . $email . '>',
              'id' => "$contactId::{$email}",
            );
          }
          elseif (in_array($contactId, $form->_bccContactIds)) {
            $bccArray[] = array(
              'text' => '"' . $value['sort_name'] . '" <' . $email . '>',
              'id' => "$contactId::{$email}",
            );
          }
        }
      }

      if (empty($toArray)) {
        CRM_Core_Error::statusBounce(ts('Selected contact(s) do not have a valid email address, or communication preferences specify DO NOT EMAIL, or they are deceased or Primary email address is On Hold.'));
      }
    }

    $form->assign('toContact', json_encode($toArray));
    $form->assign('ccContact', json_encode($ccArray));
    $form->assign('bccContact', json_encode($bccArray));

    $form->assign('suppressedEmails', $suppressedEmails);

    $form->assign('totalSelectedContacts', count($form->_contactIds));

    $form->add('text', 'subject', ts('Subject'), 'size=50 maxlength=254', TRUE);

    $form->add('select', 'fromEmailAddress', ts('From'), $form->_fromEmails, TRUE, array('class' => 'crm-select2 huge'));

    CRM_Mailing_BAO_Mailing::commonCompose($form);

    // add attachments
    CRM_Core_BAO_File::buildAttachment($form, NULL);

    if ($form->_single) {
      // also fix the user context stack
      if ($form->_caseId) {
        $ccid = CRM_Core_DAO::getFieldValue('CRM_Case_DAO_CaseContact', $form->_caseId,
          'contact_id', 'case_id'
        );
        $url = CRM_Utils_System::url('civicrm/contact/view/case',
          "&reset=1&action=view&cid={$ccid}&id={$form->_caseId}"
        );
      }
      elseif ($form->_context) {
        $url = CRM_Utils_System::url('civicrm/dashboard', 'reset=1');
      }
      else {
        $url = CRM_Utils_System::url('civicrm/contact/view',
          "&show=1&action=browse&cid={$form->_contactIds[0]}&selectedChild=activity"
        );
      }

      $session = CRM_Core_Session::singleton();
      $session->replaceUserContext($url);
      $form->addDefaultButtons(ts('Send Email'), 'upload', 'cancel');
    }
    else {
      $form->addDefaultButtons(ts('Send Email'), 'upload');
    }

    $fields = array(
      'followup_assignee_contact_id' => array(
        'type' => 'entityRef',
        'label' => ts('Assigned to'),
        'attributes' => array(
          'multiple' => TRUE,
          'create' => TRUE,
          'api' => array('params' => array('is_deceased' => 0)),
        ),
      ),
      'followup_activity_type_id' => array(
        'type' => 'select',
        'label' => ts('Followup Activity'),
        'attributes' => array('' => '- ' . ts('select activity') . ' -') + CRM_Core_PseudoConstant::ActivityType(FALSE),
        'extra' => array('class' => 'crm-select2'),
      ),
      'followup_activity_subject' => array(
        'type' => 'text',
        'label' => ts('Subject'),
        'attributes' => CRM_Core_DAO::getAttribute('CRM_Activity_DAO_Activity',
          'subject'
        ),
      ),
    );

    //add followup date
    $form->addDateTime('followup_date', ts('in'), FALSE, array('formatType' => 'activityDateTime'));

    foreach ($fields as $field => $values) {
      if (!empty($fields[$field])) {
        $attribute = CRM_Utils_Array::value('attributes', $values);
        $required = !empty($values['required']);

        if ($values['type'] == 'select' && empty($attribute)) {
          $form->addSelect($field, array('entity' => 'activity'), $required);
        }
        elseif ($values['type'] == 'entityRef') {
          $form->addEntityRef($field, $values['label'], $attribute, $required);
        }
        else {
          $form->add($values['type'], $field, $values['label'], $attribute, $required, CRM_Utils_Array::value('extra', $values));
        }
      }
    }

    $form->addFormRule(array('CRM_Contact_Form_Task_EmailCommon', 'formRule'), $form);
    CRM_Core_Resources::singleton()->addScriptFile('civicrm', 'templates/CRM/Contact/Form/Task/EmailCommon.js', 0, 'html-header');
  }

  /**
   * Form rule.
   *
   * @param array $fields
   *   The input form values.
   * @param array $dontCare
   * @param array $self
   *   Additional values form 'this'.
   *
   * @return bool|array
   *   true if no errors, else array of errors
   */
  public static function formRule($fields, $dontCare, $self) {
    $errors = array();
    $template = CRM_Core_Smarty::singleton();

    if (isset($fields['html_message'])) {
      $htmlMessage = str_replace(array("\n", "\r"), ' ', $fields['html_message']);
      $htmlMessage = str_replace('"', '\"', $htmlMessage);
      $template->assign('htmlContent', $htmlMessage);
    }

    //Added for CRM-1393
    if (!empty($fields['saveTemplate']) && empty($fields['saveTemplateName'])) {
      $errors['saveTemplateName'] = ts("Enter name to save message template");
    }

    return empty($errors) ? TRUE : $errors;
  }

  /**
   * Process the form after the input has been submitted and validated.
   *
   * @param CRM_Core_Form $form
   */
  public static function postProcess(&$form) {
    if (count($form->_contactIds) > self::MAX_EMAILS_KILL_SWITCH) {
      CRM_Core_Error::fatal(ts('Please do not use this task to send a lot of emails (greater than %1). We recommend using CiviMail instead.',
        array(1 => self::MAX_EMAILS_KILL_SWITCH)
      ));
    }

    // check and ensure that
    $formValues = $form->controller->exportValues($form->getName());
    $fromEmail = $formValues['fromEmailAddress'];
    $from = CRM_Utils_Array::value($fromEmail, $form->_emails);
    $subject = $formValues['subject'];

    // CRM-13378: Append CC and BCC information at the end of Activity Details and format cc and bcc fields
    $elements = array('cc_id', 'bcc_id');
    $additionalDetails = NULL;
    $ccValues = $bccValues = array();
    foreach ($elements as $element) {
      if (!empty($formValues[$element])) {
        $allEmails = explode(',', $formValues[$element]);
        foreach ($allEmails as $value) {
          list($contactId, $email) = explode('::', $value);
          $contactURL = CRM_Utils_System::url('civicrm/contact/view', "reset=1&force=1&cid={$contactId}", TRUE);
          switch ($element) {
            case 'cc_id':
              $ccValues['email'][] = '"' . $form->_contactDetails[$contactId]['sort_name'] . '" <' . $email . '>';
              $ccValues['details'][] = "<a href='{$contactURL}'>" . $form->_contactDetails[$contactId]['display_name'] . "</a>";
              break;

            case 'bcc_id':
              $bccValues['email'][] = '"' . $form->_contactDetails[$contactId]['sort_name'] . '" <' . $email . '>';
              $bccValues['details'][] = "<a href='{$contactURL}'>" . $form->_contactDetails[$contactId]['display_name'] . "</a>";
              break;
          }
        }
      }
    }

    $cc = $bcc = '';
    if (!empty($ccValues)) {
      $cc = implode(',', $ccValues['email']);
      $additionalDetails .= "\ncc : " . implode(", ", $ccValues['details']);
    }
    if (!empty($bccValues)) {
      $bcc = implode(',', $bccValues['email']);
      $additionalDetails .= "\nbcc : " . implode(", ", $bccValues['details']);
    }

    // CRM-5916: prepend case id hash to CiviCase-originating emails’ subjects
    if (isset($form->_caseId) && is_numeric($form->_caseId)) {
      $hash = substr(sha1(CIVICRM_SITE_KEY . $form->_caseId), 0, 7);
      $subject = "[case #$hash] $subject";
    }

    // process message template
    if (!empty($formValues['saveTemplate']) || !empty($formValues['updateTemplate'])) {
      $messageTemplate = array(
        'msg_text' => $formValues['text_message'],
        'msg_html' => $formValues['html_message'],
        'msg_subject' => $formValues['subject'],
        'is_active' => TRUE,
      );

      if (!empty($formValues['saveTemplate'])) {
        $messageTemplate['msg_title'] = $formValues['saveTemplateName'];
        CRM_Core_BAO_MessageTemplate::add($messageTemplate);
      }

      if (!empty($formValues['template']) && !empty($formValues['updateTemplate'])) {
        $messageTemplate['id'] = $formValues['template'];
        unset($messageTemplate['msg_title']);
        CRM_Core_BAO_MessageTemplate::add($messageTemplate);
      }
    }

    $attachments = array();
    CRM_Core_BAO_File::formatAttachment($formValues,
      $attachments,
      NULL, NULL
    );

    // format contact details array to handle multiple emails from same contact
    $formattedContactDetails = array();
    $tempEmails = array();
    foreach ($form->_contactIds as $key => $contactId) {
      // if we dont have details on this contactID, we should ignore
      // potentially this is due to the contact not wanting to receive email
      if (!isset($form->_contactDetails[$contactId])) {
        continue;
      }
      $email = $form->_toContactEmails[$key];
      // prevent duplicate emails if same email address is selected CRM-4067
      // we should allow same emails for different contacts
      $emailKey = "{$contactId}::{$email}";
      if (!in_array($emailKey, $tempEmails)) {
        $tempEmails[] = $emailKey;
        $details = $form->_contactDetails[$contactId];
        $details['email'] = $email;
        unset($details['email_id']);
        $formattedContactDetails[] = $details;
      }
    }

    // send the mail
    list($sent, $activityId) = CRM_Activity_BAO_Activity::sendEmail(
      $formattedContactDetails,
      $subject,
      $formValues['text_message'],
      $formValues['html_message'],
      NULL,
      NULL,
      $from,
      $attachments,
      $cc,
      $bcc,
      array_keys($form->_toContactDetails),
      $additionalDetails
    );

    $followupStatus = '';
    if ($sent) {
      $followupActivity = NULL;
      if (!empty($formValues['followup_activity_type_id'])) {
        $params['followup_activity_type_id'] = $formValues['followup_activity_type_id'];
        $params['followup_activity_subject'] = $formValues['followup_activity_subject'];
        $params['followup_date'] = $formValues['followup_date'];
        $params['followup_date_time'] = $formValues['followup_date_time'];
        $params['target_contact_id'] = $form->_contactIds;
        $params['followup_assignee_contact_id'] = explode(',', $formValues['followup_assignee_contact_id']);
        $followupActivity = CRM_Activity_BAO_Activity::createFollowupActivity($activityId, $params);
        $followupStatus = ts('A followup activity has been scheduled.');

        if (Civi::settings()->get('activity_assignee_notification')) {
          if ($followupActivity) {
            $mailToFollowupContacts = array();
            $assignee = array($followupActivity->id);
            $assigneeContacts = CRM_Activity_BAO_ActivityAssignment::getAssigneeNames($assignee, TRUE, FALSE);
            foreach ($assigneeContacts as $values) {
              $mailToFollowupContacts[$values['email']] = $values;
            }

            $sentFollowup = CRM_Activity_BAO_Activity::sendToAssignee($followupActivity, $mailToFollowupContacts);
            if ($sentFollowup) {
              $followupStatus .= '<br />' . ts("A copy of the follow-up activity has also been sent to follow-up assignee contacts(s).");
            }
          }
        }
      }

      $count_success = count($form->_toContactDetails);
      CRM_Core_Session::setStatus(ts('One message was sent successfully. ', array(
            'plural' => '%count messages were sent successfully. ',
            'count' => $count_success,
          )) . $followupStatus, ts('Message Sent', array('plural' => 'Messages Sent', 'count' => $count_success)), 'success');
    }

    // Display the name and number of contacts for those email is not sent.
    // php 5.4 throws out a notice since the values of these below arrays are arrays.
    // the behavior is not documented in the php manual, but it does the right thing
    // suppressing the notices to get things in good shape going forward
    $emailsNotSent = @array_diff_assoc($form->_allContactDetails, $form->_contactDetails);

    if ($emailsNotSent) {
      $not_sent = array();
      foreach ($emailsNotSent as $contactId => $values) {
        $displayName = $values['display_name'];
        $email = $values['email'];
        $contactViewUrl = CRM_Utils_System::url('civicrm/contact/view', "reset=1&cid=$contactId");
        $not_sent[] = "<a href='$contactViewUrl' title='$email'>$displayName</a>" . ($values['on_hold'] ? '(' . ts('on hold') . ')' : '');
      }
      $status = '(' . ts('because no email address on file or communication preferences specify DO NOT EMAIL or Contact is deceased or Primary email address is On Hold') . ')<ul><li>' . implode('</li><li>', $not_sent) . '</li></ul>';
      CRM_Core_Session::setStatus($status, ts('One Message Not Sent', array(
            'count' => count($emailsNotSent),
            'plural' => '%count Messages Not Sent',
          )), 'info');
    }

    if (isset($form->_caseId)) {
      // if case-id is found in the url, create case activity record
      $cases = explode(',', $form->_caseId);
      foreach ($cases as $key => $val) {
        if (is_numeric($val)) {
          $caseParams = array(
            'activity_id' => $activityId,
            'case_id' => $val,
          );
          CRM_Case_BAO_Case::processCaseActivity($caseParams);
        }
      }
    }
  }

}