<?php
/*
 +--------------------------------------------------------------------+
 | Copyright CiviCRM LLC. All rights reserved.                        |
 |                                                                    |
 | This work is published under the GNU AGPLv3 license with some      |
 | permitted exceptions and without any warranty. For full license    |
 | and copyright information, see https://civicrm.org/licensing       |
 +--------------------------------------------------------------------+
 */

/**
 *
 * @package CRM
 * @copyright CiviCRM LLC https://civicrm.org/licensing
 */

/**
 * This class generates form components for processing a petition signature.
 */
class CRM_Campaign_Form_Petition_Signature extends CRM_Core_Form {
  const EMAIL_THANK = 1, EMAIL_CONFIRM = 2, MODE_CREATE = 4;

  protected $_mode;

  /**
   * The id of the contact associated with this signature
   *
   * @var int
   */
  public $_contactId;

  /**
   * Is this a logged in user
   *
   * @var int
   */
  protected $_loggedIn = FALSE;

  /**
   * The contact type
   *
   * @var string
   * ("Individual"/"Household"/"Organization"). Never been tested for something else than Individual
   */
  protected $_ctype = 'Individual';

  /**
   * The contact profile id attached with this petition
   *
   * @var int
   */
  protected $_contactProfileId;

  /**
   * The contact profile fields used for this petition
   *
   * @var array
   */
  public $_contactProfileFields;

  /**
   * The activity profile id attached with this petition
   *
   * @var int
   */
  protected $_activityProfileId;

  /**
   * The activity profile fields used for this petition
   *
   * @var array
   */
  public $_activityProfileFields;

  /**
   * The id of the survey (petition) we are processing
   *
   * @var int
   */
  public $_surveyId;

  /**
   * The tag id used to set against contacts with unconfirmed email
   *
   * @var int
   */
  protected $_tagId;

  /**
   * Values to use for custom profiles
   *
   * @var array
   */
  public $_values;

  /**
   * The params submitted by the form
   *
   * @var array
   */
  protected $_params;

  /**
   * Which email send mode do we use
   *
   * @var int
   * EMAIL_THANK = 1,
   *     connected user via login/pwd - thank you
   *      or dedupe contact matched who doesn't have a tag CIVICRM_TAG_UNCONFIRMED - thank you
   *     or login using fb connect - thank you + click to add msg to fb wall
   * EMAIL_CONFIRM = 2;
   *    send a confirmation request email
   */
  protected $_sendEmailMode;

  protected $_image_URL;

  /**
   * Prevent double clicks from creating duplicate or blank records.
   *
   * @var bool
   */
  public $submitOnce = TRUE;

  /**
   */
  public function __construct() {
    parent::__construct();
    // this property used by civicrm_fb module and if true, forces thank you email to be sent
    // for users signing in via Facebook connect; also sets Fb email to check against
    $this->forceEmailConfirmed['flag'] = FALSE;
    $this->forceEmailConfirmed['email'] = '';
  }

  /**
   * @return mixed
   */
  public function getContactID() {
    $tempID = CRM_Utils_Request::retrieve('cid', 'Positive', $this);

    // force to ignore the authenticated user
    if ($tempID === '0') {
      return $tempID;
    }

    //check if this is a checksum authentication
    $userChecksum = CRM_Utils_Request::retrieve('cs', 'String', $this);
    if ($userChecksum) {
      //check for anonymous user.
      $validUser = CRM_Contact_BAO_Contact_Utils::validChecksum($tempID, $userChecksum);
      if ($validUser) {
        return $tempID;
      }
    }

    // check if the user is registered and we have a contact ID
    $session = CRM_Core_Session::singleton();
    return $session->get('userID');
  }

  /**
   * Get the active UFGroups (profiles) on this form
   * Many forms load one or more UFGroups (profiles).
   * This provides a standard function to retrieve the IDs of those profiles from the form
   * so that you can implement things such as "is is_captcha field set on any of the active profiles on this form?"
   *
   * NOT SUPPORTED FOR USE OUTSIDE CORE EXTENSIONS - Added for reCAPTCHA core extension.
   *
   * @return array
   */
  public function getUFGroupIDs() {
    $ufGroupIDs = [];
    if (!empty($this->_contactProfileId)) {
      $ufGroupIDs[] = $this->_contactProfileId;
    }
    if (!empty($this->_activityProfileId)) {
      $ufGroupIDs[] = $this->_activityProfileId;
    }
    return $ufGroupIDs;
  }

  public function preProcess() {
    $this->bao = new CRM_Campaign_BAO_Petition();
    $this->_mode = self::MODE_CREATE;

    //get the survey id
    $this->_surveyId = CRM_Utils_Request::retrieve('sid', 'Positive', $this);

    //some sanity checks
    if (!$this->_surveyId) {
      CRM_Core_Error::statusBounce(ts('Petition id is not valid. (it needs a "sid" in the url).'));
      return;
    }
    //check petition is valid and active
    $params['id'] = $this->_surveyId;
    $this->petition = [];
    CRM_Campaign_BAO_Survey::retrieve($params, $this->petition);
    if (empty($this->petition)) {
      CRM_Core_Error::statusBounce(ts('Petition doesn\'t exist.'));
    }
    if ($this->petition['is_active'] == 0) {
      $this->assign('isActive', FALSE);
    }
    else {
      $this->assign('isActive', TRUE);
    }

    //get userID from session
    $session = CRM_Core_Session::singleton();

    //get the contact id for this user if logged in
    $this->_contactId = $this->getContactId();
    if (isset($this->_contactId)) {
      $this->_loggedIn = TRUE;
    }

    // add the custom contact and activity profile fields to the signature form

    $ufJoinParams = [
      'entity_id' => $this->_surveyId,
      'entity_table' => 'civicrm_survey',
      'module' => 'CiviCampaign',
      'weight' => 2,
    ];

    $this->_contactProfileId = CRM_Core_BAO_UFJoin::findUFGroupId($ufJoinParams);
    if ($this->_contactProfileId) {
      $this->_contactProfileFields = CRM_Core_BAO_UFGroup::getFields($this->_contactProfileId, FALSE, CRM_Core_Action::ADD);
    }
    if (!isset($this->_contactProfileFields['email-Primary'])) {
      CRM_Core_Error::statusBounce(ts('The contact profile needs to contain the primary email address field'));
    }

    $ufJoinParams['weight'] = 1;
    $this->_activityProfileId = CRM_Core_BAO_UFJoin::findUFGroupId($ufJoinParams);

    if ($this->_activityProfileId) {
      $this->_activityProfileFields = CRM_Core_BAO_UFGroup::getFields($this->_activityProfileId, FALSE, CRM_Core_Action::ADD);
    }

    $this->setDefaultValues();
    $this->setTitle($this->petition['title']);
  }

  /**
   * Set default values for the form.
   */
  public function setDefaultValues() {
    $this->_defaults = [];
    if ($this->_contactId) {
      CRM_Core_BAO_UFGroup::setProfileDefaults($this->_contactId, $this->_contactProfileFields, $this->_defaults, TRUE);
      if ($this->_activityProfileId) {
        CRM_Core_BAO_UFGroup::setProfileDefaults($this->_contactId, $this->_activityProfileFields, $this->_defaults, TRUE);
      }
    }

    //set custom field defaults

    foreach ($this->_contactProfileFields as $name => $field) {
      if ($customFieldID = CRM_Core_BAO_CustomField::getKeyID($name)) {
        $htmlType = $field['html_type'];

        if (!isset($this->_defaults[$name])) {
          CRM_Core_BAO_CustomField::setProfileDefaults($customFieldID,
            $name,
            $this->_defaults,
            $this->_contactId,
            $this->_mode
          );
        }
      }
    }

    if ($this->_activityProfileFields) {
      foreach ($this->_activityProfileFields as $name => $field) {
        if ($customFieldID = CRM_Core_BAO_CustomField::getKeyID($name)) {
          $htmlType = $field['html_type'];

          if (!isset($this->_defaults[$name])) {
            CRM_Core_BAO_CustomField::setProfileDefaults($customFieldID,
              $name,
              $this->_defaults,
              $this->_contactId,
              $this->_mode
            );
          }
        }
      }
    }

    $this->setDefaults($this->_defaults);
  }

  public function buildQuickForm() {
    $this->assign('survey_id', $this->_surveyId);
    $this->assign('petitionTitle', $this->petition['title']);
    if (isset($_COOKIE['signed_' . $this->_surveyId])) {
      if (isset($_COOKIE['confirmed_' . $this->_surveyId])) {
        $this->assign('duplicate', "confirmed");
      }
      else {
        $this->assign('duplicate', "unconfirmed");
      }
      return;
    }

    $this->applyFilter('__ALL__', 'trim');

    $this->buildCustom($this->_contactProfileId, 'petitionContactProfile');
    if ($this->_activityProfileId) {
      $this->buildCustom($this->_activityProfileId, 'petitionActivityProfile');
    }
    // add buttons
    $this->addButtons([
      [
        'type' => 'upload',
        'name' => ts('Sign the Petition'),
        'isDefault' => TRUE,
      ],
    ]);
  }

  /**
   * add the rules (mainly global rules) for form.
   * All local rules are added near the element
   *
   * @param $fields
   * @param $files
   * @param $errors
   *
   * @see valid_date
   * @return array|bool
   */
  public static function formRule($fields, $files, $errors) {
    $errors = [];

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

  /**
   * Form submission of petition signature.
   */
  public function postProcess() {
    $tag_name = Civi::settings()->get('tag_unconfirmed');

    if ($tag_name) {
      // Check if contact 'Unconfirmed' tag exists, else create one
      // This should be in the petition module initialise code to create a default tag for this
      $tag_params['name'] = $tag_name;
      $tag_params['version'] = 3;
      $tag = civicrm_api('tag', 'get', $tag_params);
      if ($tag['count'] == 0) {
        //create tag
        $tag_params['label'] = ts('Unconfirmed');
        $tag_params['color'] = '#ffdd00';
        $tag_params['description'] = $tag_name;
        $tag_params['is_reserved'] = 1;
        $tag_params['used_for'] = 'civicrm_contact';
        $tag = civicrm_api('tag', 'create', $tag_params);
      }
      $this->_tagId = $tag['id'];
    }

    // export the field values to be used for saving the profile form
    $params = $this->controller->exportValues($this->_name);

    if (isset($this->_surveyId)) {
      $params['sid'] = $this->_surveyId;
    }

    if (isset($this->_contactId)) {
      $params['contactId'] = $this->_contactId;
    }

    // if logged in user, skip dedupe
    if ($this->_loggedIn) {
      $ids[0] = $this->_contactId;
    }
    else {
      $ids = CRM_Contact_BAO_Contact::getDuplicateContacts($params, $this->_ctype, 'Unsupervised', [], FALSE);
    }

    $petition_params['id'] = $this->_surveyId;
    $petition = [];
    CRM_Campaign_BAO_Survey::retrieve($petition_params, $petition);

    switch (count($ids)) {
      case 0:
        //no matching contacts - create a new contact
        // Add a source for this new contact
        $params['source'] = ts('Petition Signature') . ' ' . $this->petition['title'];

        if ($this->petition['bypass_confirm']) {
          // send thank you email directly, bypassing confirmation
          $this->_sendEmailMode = self::EMAIL_THANK;
          // Set status for signature activity to completed
          $params['statusId'] = 2;
        }
        else {
          $this->_sendEmailMode = self::EMAIL_CONFIRM;

          // Set status for signature activity to scheduled until email is verified
          $params['statusId'] = 1;
        }
        break;

      case 1:
        $this->_contactId = $params['contactId'] = $ids[0];

        // check if user has already signed this petition - redirects to Thank You if true
        $this->redirectIfSigned($params);

        if ($this->petition['bypass_confirm']) {
          // send thank you email directly, bypassing confirmation
          $this->_sendEmailMode = self::EMAIL_THANK;
          // Set status for signature activity to completed
          $params['statusId'] = 2;
          break;
        }

        // dedupe matched single contact, check for 'unconfirmed' tag
        if ($tag_name) {
          $tag = new CRM_Core_DAO_EntityTag();
          $tag->entity_id = $this->_contactId;
          $tag->tag_id = $this->_tagId;

          if (!($tag->find())) {
            // send thank you email directly, the user is known and validated
            $this->_sendEmailMode = self::EMAIL_THANK;
            // Set status for signature activity to completed
            $params['statusId'] = 2;
          }
          else {
            // send email verification email
            $this->_sendEmailMode = self::EMAIL_CONFIRM;
            // Set status for signature activity to scheduled until email is verified
            $params['statusId'] = 1;
          }
        }
        break;

      default:
        // more than 1 matching contact
        // for time being, take the first matching contact (not sure that's the best strategy, but better than creating another duplicate)
        $this->_contactId = $params['contactId'] = $ids[0];

        // check if user has already signed this petition - redirects to Thank You if true
        $this->redirectIfSigned($params);

        if ($this->petition['bypass_confirm']) {
          // send thank you email directly, bypassing confirmation
          $this->_sendEmailMode = self::EMAIL_THANK;
          // Set status for signature activity to completed
          $params['statusId'] = 2;
          break;
        }

        if ($tag_name) {
          $tag = new CRM_Core_DAO_EntityTag();
          $tag->entity_id = $this->_contactId;
          $tag->tag_id = $this->_tagId;

          if (!($tag->find())) {
            // send thank you email
            $this->_sendEmailMode = self::EMAIL_THANK;
            // Set status for signature activity to completed
            $params['statusId'] = 2;
          }
          else {
            // send email verification email
            $this->_sendEmailMode = self::EMAIL_CONFIRM;
            // Set status for signature activity to scheduled until email is verified
            $params['statusId'] = 1;
          }
        }
        break;
    }

    $transaction = new CRM_Core_Transaction();

    // CRM-17029 - get the add_to_group_id from the _contactProfileFields array.
    // There's a much more elegant solution with
    // array_values($this->_contactProfileFields)[0] but it's PHP 5.4+ only.
    $slice = array_slice($this->_contactProfileFields, 0, 1);
    $firstField = array_shift($slice);
    $addToGroupID = $firstField['add_to_group_id'] ?? NULL;
    $this->_contactId = CRM_Contact_BAO_Contact::createProfileContact($params, $this->_contactProfileFields,
      $this->_contactId, $addToGroupID,
      $this->_contactProfileId, $this->_ctype,
      TRUE
    );

    // get additional custom activity profile field data
    // to save with new signature activity record
    $surveyInfo = $this->bao->getSurveyInfo($this->_surveyId);

    $params['custom'] = CRM_Core_BAO_CustomField::postProcess($params,
      NULL,
      'Activity'
    );

    // create the signature activity record
    $params['contactId'] = $this->_contactId;
    $params['activity_campaign_id'] = $this->petition['campaign_id'] ?? NULL;
    $result = $this->bao->createSignature($params);

    // send thank you or email verification emails

    // if logged in using Facebook connect and email on form matches Fb email,
    // no need for email confirmation, send thank you email
    if ($this->forceEmailConfirmed['flag'] &&
      ($this->forceEmailConfirmed['email'] == $params['email-Primary'])
    ) {
      $this->_sendEmailMode = self::EMAIL_THANK;
    }

    switch ($this->_sendEmailMode) {
      case self::EMAIL_THANK:
        // mark the signature activity as completed and set confirmed cookie
        $this->bao->confirmSignature($result->id, $this->_contactId, $this->_surveyId);
        break;

      case self::EMAIL_CONFIRM:
        // set 'Unconfirmed' tag for this new contact
        if ($tag_name) {
          unset($tag_params);
          $tag_params['contact_id'] = $this->_contactId;
          $tag_params['tag_id'] = $this->_tagId;
          $tag_params['version'] = 3;
          $tag_value = civicrm_api('entity_tag', 'create', $tag_params);
        }
        break;
    }

    //send email
    $params['activityId'] = $result->id;
    $params['tagId'] = $this->_tagId;

    $transaction->commit();

    $this->bao->sendEmail($params, $this->_sendEmailMode);

    if ($result) {
      // call the hook before we redirect
      $this->postProcessHook();

      // set the template to thank you
      $url = CRM_Utils_System::url(
        'civicrm/petition/thankyou',
        'pid=' . $this->_surveyId . '&id=' . $this->_sendEmailMode . '&reset=1'
      );
      CRM_Utils_System::redirect($url);
    }
  }

  /**
   * Build the petition profile form.
   *
   * @param int $id
   * @param string $name
   */
  public function buildCustom($id, $name) {
    if ($id) {
      $session = CRM_Core_Session::singleton();
      $this->assign("petition", $this->petition);
      //$contactID = $this->_contactId;
      $contactID = NULL;
      $this->assign('contact_id', $this->_contactId);

      $fields = NULL;
      // TODO: contactID is never set (commented above)
      if ($contactID) {
        if (CRM_Core_BAO_UFGroup::filterUFGroups($id, $contactID)) {
          $fields = CRM_Core_BAO_UFGroup::getFields($id, FALSE, CRM_Core_Action::ADD);
        }
      }
      else {
        $fields = CRM_Core_BAO_UFGroup::getFields($id, FALSE, CRM_Core_Action::ADD);
      }

      if ($fields) {
        $this->assign($name, $fields);

        foreach ($fields as $key => $field) {
          // if state or country in the profile, create map
          list($prefixName, $index) = CRM_Utils_System::explode('-', $key, 2);

          CRM_Core_BAO_UFGroup::buildProfile($this, $field, CRM_Profile_Form::MODE_CREATE, $contactID, TRUE);
          $this->_fields[$key] = $field;
        }
      }
    }
  }

  /**
   * @return string
   */
  public function getTemplateFileName() {
    if (isset($this->thankyou)) {
      return ('CRM/Campaign/Page/Petition/ThankYou.tpl');
    }
    else {
    }
    return parent::getTemplateFileName();
  }

  /**
   * check if user has already signed this petition.
   * @param array $params
   */
  public function redirectIfSigned($params) {
    $signature = $this->bao->checkSignature($this->_surveyId, $this->_contactId);
    //TODO: error case when more than one signature found for this petition and this contact
    if (!empty($signature) && (count($signature) == 1)) {
      $signature_id = array_keys($signature);
      switch ($signature[$signature_id[0]]['status_id']) {
        case 1:
          //status is scheduled - email is unconfirmed
          CRM_Utils_System::redirect(CRM_Utils_System::url('civicrm/petition/thankyou', 'pid=' . $this->_surveyId . '&id=4&reset=1'));
          break;

        case 2:
          //status is completed
          $this->bao->sendEmail($params, 1);
          CRM_Utils_System::redirect(CRM_Utils_System::url('civicrm/petition/thankyou', 'pid=' . $this->_surveyId . '&id=5&reset=1'));
          break;
      }
    }
  }

}
