[Summary view]

Differences Between: [Versions 39 and 310] [Versions 39 and 311] [Versions 39 and 400] [Versions 39 and 401] [Versions 39 and 402] [Versions 39 and 403]

   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  /**
  18   * Web service functions relating to scale grades and grading.
  19   *
  20   * @package    core_grades
  21   * @copyright  2019 Andrew Nicols <andrew@nicols.co.uk>
  22   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23   */
  24  
  25  declare(strict_types = 1);
  26  
  27  namespace core_grades\grades\grader\gradingpanel\scale\external;
  28  
  29  use coding_exception;
  30  use context;
  31  use core_grades\component_gradeitem as gradeitem;
  32  use core_grades\component_gradeitems;
  33  use core_user;
  34  use external_api;
  35  use external_function_parameters;
  36  use external_multiple_structure;
  37  use external_single_structure;
  38  use external_value;
  39  use external_warnings;
  40  use moodle_exception;
  41  use required_capability_exception;
  42  use stdClass;
  43  
  44  /**
  45   * External grading panel scale API
  46   *
  47   * @package    core_grades
  48   * @copyright  2019 Andrew Nicols <andrew@nicols.co.uk>
  49   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  50   */
  51  class fetch extends external_api {
  52  
  53      /**
  54       * Describes the parameters for fetching the grading panel for a simple grade.
  55       *
  56       * @return external_function_parameters
  57       * @since Moodle 3.8
  58       */
  59      public static function execute_parameters(): external_function_parameters {
  60          return new external_function_parameters ([
  61              'component' => new external_value(
  62                  PARAM_ALPHANUMEXT,
  63                  'The name of the component',
  64                  VALUE_REQUIRED
  65              ),
  66              'contextid' => new external_value(
  67                  PARAM_INT,
  68                  'The ID of the context being graded',
  69                  VALUE_REQUIRED
  70              ),
  71              'itemname' => new external_value(
  72                  PARAM_ALPHANUM,
  73                  'The grade item itemname being graded',
  74                  VALUE_REQUIRED
  75              ),
  76              'gradeduserid' => new external_value(
  77                  PARAM_INT,
  78                  'The ID of the user show',
  79                  VALUE_REQUIRED
  80              ),
  81          ]);
  82      }
  83  
  84      /**
  85       * Fetch the data required to build a grading panel for a simple grade.
  86       *
  87       * @param string $component
  88       * @param int $contextid
  89       * @param string $itemname
  90       * @param int $gradeduserid
  91       * @return array
  92       * @throws \dml_exception
  93       * @throws \invalid_parameter_exception
  94       * @throws \restricted_context_exception
  95       * @throws coding_exception
  96       * @throws moodle_exception
  97       * @since Moodle 3.8
  98       */
  99      public static function execute(string $component, int $contextid, string $itemname, int $gradeduserid): array {
 100          global $USER, $CFG;
 101          require_once("{$CFG->libdir}/gradelib.php");
 102          [
 103              'component' => $component,
 104              'contextid' => $contextid,
 105              'itemname' => $itemname,
 106              'gradeduserid' => $gradeduserid,
 107          ] = self::validate_parameters(self::execute_parameters(), [
 108              'component' => $component,
 109              'contextid' => $contextid,
 110              'itemname' => $itemname,
 111              'gradeduserid' => $gradeduserid,
 112          ]);
 113  
 114          // Validate the context.
 115          $context = context::instance_by_id($contextid);
 116          self::validate_context($context);
 117  
 118          // Validate that the supplied itemname is a gradable item.
 119          if (!component_gradeitems::is_valid_itemname($component, $itemname)) {
 120              throw new coding_exception("The '{$itemname}' item is not valid for the '{$component}' component");
 121          }
 122  
 123          // Fetch the gradeitem instance.
 124          $gradeitem = gradeitem::instance($component, $context, $itemname);
 125  
 126          if (!$gradeitem->is_using_scale()) {
 127              throw new moodle_exception("The {$itemname} item in {$component}/{$contextid} is not configured for grading with scales");
 128          }
 129  
 130          $gradeduser = \core_user::get_user($gradeduserid, '*', MUST_EXIST);
 131  
 132          // One can access its own grades. Others just if they're graders.
 133          if ($gradeduserid != $USER->id) {
 134              $gradeitem->require_user_can_grade($gradeduser, $USER);
 135          }
 136  
 137          // Set up some items we need to return on other interfaces.
 138          $gradegrade = \grade_grade::fetch(['itemid' => $gradeitem->get_grade_item()->id, 'userid' => $gradeduser->id]);
 139          $gradername = $gradegrade ? fullname(\core_user::get_user($gradegrade->usermodified)) : null;
 140          $maxgrade = (int) $gradeitem->get_grade_item()->grademax;
 141  
 142          return self::get_fetch_data($gradeitem, $gradeduser, $maxgrade, $gradername);
 143      }
 144  
 145      /**
 146       * Get the data to be fetched.
 147       *
 148       * @param gradeitem $gradeitem
 149       * @param stdClass $gradeduser
 150       * @param int $maxgrade
 151       * @param string|null $gradername
 152       * @return array
 153       */
 154      public static function get_fetch_data(gradeitem $gradeitem, stdClass $gradeduser, int $maxgrade, ?string $gradername): array {
 155          global $USER;
 156  
 157          $hasgrade = $gradeitem->user_has_grade($gradeduser);
 158          $grade = $gradeitem->get_grade_for_user($gradeduser, $USER);
 159          $currentgrade = (int) unformat_float($grade->grade);
 160  
 161          $menu = $gradeitem->get_grade_menu();
 162          $values = array_map(function($description, $value) use ($currentgrade) {
 163              return [
 164                  'value' => $value,
 165                  'title' => $description,
 166                  'selected' => ($value == $currentgrade),
 167              ];
 168          }, $menu, array_keys($menu));
 169  
 170          return [
 171              'templatename' => 'core_grades/grades/grader/gradingpanel/scale',
 172              'hasgrade' => $hasgrade,
 173              'grade' => [
 174                  'options' => $values,
 175                  'usergrade' => $grade->grade,
 176                  'maxgrade' => $maxgrade,
 177                  'gradedby' => $gradername,
 178                  'timecreated' => $grade->timecreated,
 179                  'timemodified' => $grade->timemodified,
 180              ],
 181              'warnings' => [],
 182          ];
 183      }
 184  
 185      /**
 186       * Describes the data returned from the external function.
 187       *
 188       * @return external_single_structure
 189       * @since Moodle 3.8
 190       */
 191      public static function execute_returns(): external_single_structure {
 192          return new external_single_structure([
 193              'templatename' => new external_value(PARAM_SAFEPATH, 'The template to use when rendering this data'),
 194              'hasgrade' => new external_value(PARAM_BOOL, 'Does the user have a grade?'),
 195              'grade' => new external_single_structure([
 196                  'options' => new external_multiple_structure(
 197                      new external_single_structure([
 198                          'value' => new external_value(PARAM_FLOAT, 'The grade value'),
 199                          'title' => new external_value(PARAM_RAW, 'The description fo the option'),
 200                          'selected' => new external_value(PARAM_BOOL, 'Whether this item is currently selected'),
 201                      ]),
 202                      'The description of the grade option'
 203                  ),
 204                  'usergrade' => new external_value(PARAM_RAW, 'Current user grade'),
 205                  'maxgrade' => new external_value(PARAM_RAW, 'Max possible grade'),
 206                  'gradedby' => new external_value(PARAM_RAW, 'The assumed grader of this grading instance'),
 207                  'timecreated' => new external_value(PARAM_INT, 'The time that the grade was created'),
 208                  'timemodified' => new external_value(PARAM_INT, 'The time that the grade was last updated'),
 209              ]),
 210              'warnings' => new external_warnings(),
 211          ]);
 212      }
 213  }