ドットインストール - 3分動画でマスターできるプログラミング学習サービス

Todo.php

<?php

namespace MyApp;

class Todo {
  private $_db;

  public function __construct() {
    try {
      $this->_db = new \PDO(DSN, DB_USERNAME, DB_PASSWORD);
      $this->_db->setAttribute(\PDO::ATTR_ERRMODE, \PDO::ERRMODE_EXCEPTION);
    } catch (\PDOException $e) {
      echo $e->getMessage();
      exit;
    }
  }

  public function getAll() {
    $stmt = $this->_db->query("select * from todos order by id desc");
    return $stmt->fetchAll(\PDO::FETCH_OBJ);
  }

  public function post() {
    if (!isset($_POST['mode'])) {
      throw new \Exception('mode not set!');
    }

    switch ($_POST['mode']) {
      case 'update':
        return $this->_update();
      case 'create':
        return $this->_create();
      case 'delete':
        return $this->_delete();
    }
  }

  private function _update() {
    if (!isset($_POST['id'])) {
      throw new \Exception('[update] id not set!');
    }

    $this->_db->beginTransaction();

    $sql = sprintf("update todos set state = (state + 1) %% 2 where id = %d", $_POST['id']);
    $stmt = $this->_db->prepare($sql);
    $stmt->execute();

    $sql = sprintf("select state from todos where id = %d", $_POST['id']);
    $stmt = $this->_db->query($sql);
    $state = $stmt->fetchColumn();

    $this->_db->commit();

    return [
      'state' => $state
    ];

  }

  private function _create() {

  }

  private function _delete() {

  }
}