de.systopia.twingle/CRM/Twingle/Form/Settings.php

<?php
/*------------------------------------------------------------+
| SYSTOPIA Twingle Integration                                |
| Copyright (C) 2018 SYSTOPIA                                 |
| Author: J. Schuppe (schuppe@systopia.de)                    |
+-------------------------------------------------------------+
| This program is released as free software under the         |
| Affero GPL license. You can redistribute it and/or          |
| modify it under the terms of this license which you         |
| can read by viewing the included agpl.txt or online         |
| at www.gnu.org/licenses/agpl.html. Removal of this          |
| copyright header is strictly prohibited without             |
| written permission from the original author(s).             |
+-------------------------------------------------------------*/

use CRM_Twingle_ExtensionUtil as E;

/**
 * Form controller class
 *
 * @see https://wiki.civicrm.org/confluence/display/CRMDOC/QuickForm+Reference
 */
class CRM_Twingle_Form_Settings extends CRM_Core_Form {

  /**
   * @var array list of all settings options
   */
  public static $SETTINGS_LIST = [
      'twingle_prefix',
      'twingle_use_sepa',
      'twingle_protect_recurring',
      'twingle_protect_recurring_activity_type',
      'twingle_protect_recurring_activity_subject',
      'twingle_protect_recurring_activity_status',
      'twingle_protect_recurring_activity_assignee',
  ];

  /**
   * @inheritdoc
   */
  function buildQuickForm() {
    // Set redirect destination.
    $this->controller->_destination = CRM_Utils_System::url('civicrm/admin/settings/twingle', 'reset=1');

    $this->add(
        'text',
        'twingle_prefix',
        E::ts("Twingle ID Prefix")
    );

    $this->add(
        'checkbox',
        'twingle_use_sepa',
        E::ts("Use CiviSEPA")
    );

    $this->add(
        'select',
        'twingle_protect_recurring',
        E::ts("Protect Recurring Contributions"),
        CRM_Twingle_Config::getRecurringProtectionOptions()
    );

    $this->add(
        'select',
        'twingle_protect_recurring_activity_type',
        E::ts("Activity Type"),
        $this->getOptionValueList('activity_type', [0])
    );

    $this->add(
        'text',
        'twingle_protect_recurring_activity_subject',
        E::ts("Subject"),
        ['class' => 'huge']
    );

    $this->add(
        'select',
        'twingle_protect_recurring_activity_status',
        E::ts("Status"),
        $this->getOptionValueList('activity_status')
    );

    $this->addEntityRef(
        'twingle_protect_recurring_activity_assignee',
        E::ts('Assigned To'),
        [
            'contact_type'      => ['IN' => ['Individual', 'Organization']],
            'check_permissions' => 0,
        ]
    );

    $this->addButtons(array(
      array (
          'type'      => 'submit',
          'name'      => E::ts('Save'),
          'isDefault' => TRUE,
      )
    ));

    // set defaults
    foreach (self::$SETTINGS_LIST as $setting) {
      $this->setDefaults([
          $setting => Civi::settings()->get($setting)
      ]);
    }

    parent::buildQuickForm();
  }

  /**
   * Custom form validation, because the activity creation fields
   *  are only mandatory if activity creation is active
   * @return bool
   */
  public function validate() {
    parent::validate();

    // if activity creation is active, make sure the fields are set
    $protection_mode = CRM_Utils_Array::value('twingle_protect_recurring', $this->_submitValues);
    if ($protection_mode == CRM_Twingle_Config::RCUR_PROTECTION_ACTIVITY) {
      foreach (['twingle_protect_recurring_activity_type',
                'twingle_protect_recurring_activity_subject',
                'twingle_protect_recurring_activity_status',
                'twingle_protect_recurring_activity_assignee',] as $activity_field) {
        $current_value = CRM_Utils_Array::value($activity_field, $this->_submitValues);
        if (empty($current_value)) {
          $this->_errors[$activity_field] = E::ts("This is required for activity creation");
        }
      }
    }

    return (0 == count($this->_errors));
  }


  /**
   * @inheritdoc
   */
  function postProcess() {
    $values = $this->exportValues();

    // store settings
    foreach (self::$SETTINGS_LIST as $setting) {
      Civi::settings()->set($setting, CRM_Utils_Array::value($setting, $values));
    }

    parent::postProcess();
  }


  /**
   * Get a list of option group items
   * @param $group_id  string group ID or name
   * @return array list of ID(value) => label
   * @throws CiviCRM_API3_Exception
   */
  protected function getOptionValueList($group_id, $reserved = [0,1]) {
    $list = ['' => E::ts("-select-")];
    $query = civicrm_api3('OptionValue', 'get', [
        'option_group_id' => $group_id,
        'option.limit'    => 0,
        'is_active'       => 1,
        'is_reserved'     => ['IN' => $reserved],
        'return'          => 'value,label',
    ]);
    foreach ($query['values'] as $value) {
      $list[$value['value']] = $value['label'];
    }
    return $list;
  }
}