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Differences Between: [Versions 400 and 401]

   1  <?php
   2  // This file is part of Moodle - http://moodle.org/
   3  //
   4  // Moodle is free software: you can redistribute it and/or modify
   5  // it under the terms of the GNU General Public License as published by
   6  // the Free Software Foundation, either version 3 of the License, or
   7  // (at your option) any later version.
   8  //
   9  // Moodle is distributed in the hope that it will be useful,
  10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  // GNU General Public License for more details.
  13  //
  14  // You should have received a copy of the GNU General Public License
  15  // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16  
  17  declare(strict_types=1);
  18  
  19  namespace core_reportbuilder\local\aggregation;
  20  
  21  use lang_string;
  22  use core_reportbuilder\local\report\column;
  23  
  24  /**
  25   * Column count aggregation type
  26   *
  27   * @package     core_reportbuilder
  28   * @copyright   2021 Paul Holden <paulh@moodle.com>
  29   * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  30   */
  31  class count extends base {
  32  
  33      /**
  34       * Return aggregation name
  35       *
  36       * @return lang_string
  37       */
  38      public static function get_name(): lang_string {
  39          return new lang_string('aggregationcount', 'core_reportbuilder');
  40      }
  41  
  42      /**
  43       * This aggregation can be performed on all column types
  44       *
  45       * @param int $columntype
  46       * @return bool
  47       */
  48      public static function compatible(int $columntype): bool {
  49          return true;
  50      }
  51  
  52      /**
  53       * Return the aggregated field SQL
  54       *
  55       * @param string $field
  56       * @param int $columntype
  57       * @return string
  58       */
  59      public static function get_field_sql(string $field, int $columntype): string {
  60          global $DB;
  61  
  62          if ($columntype === column::TYPE_LONGTEXT && $DB->get_dbfamily() === 'oracle') {
  63              $field = $DB->sql_compare_text($field, 255);
  64          }
  65  
  66          return "COUNT({$field})";
  67      }
  68  
  69      /**
  70       * Return formatted value for column when applying aggregation
  71       *
  72       * @param mixed $value
  73       * @param array $values
  74       * @param array $callbacks
  75       * @param int $columntype
  76       * @return int
  77       */
  78      public static function format_value($value, array $values, array $callbacks, int $columntype): int {
  79          return (int) reset($values);
  80      }
  81  }