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| BookShelfクラスに、searchメソッドを実装してください。 | |
| run.phpが正しく動作することを確認してください。 | |
| [検索要件] | |
| ISBN => 完全一致 | |
| タイトル => 部分一致 | |
| 著者 => 部分一致 | |
| readme.txt以外のファイルの変更は自由です。 |
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| <?php | |
| namespace Mitsubachi\BookShelf; | |
| class Book { | |
| /** | |
| * ISBN | |
| * | |
| * @var string | |
| */ | |
| protected $isbn; | |
| /** | |
| * タイトル | |
| * | |
| * @var string | |
| */ | |
| protected $title; | |
| /** | |
| * 著者 | |
| * | |
| * @var string | |
| */ | |
| protected $author; | |
| /** | |
| * Set the isbn. | |
| * | |
| * @param string $isbn | |
| */ | |
| public function setIsbn($isbn) | |
| { | |
| $this->isbn = $isbn; | |
| } | |
| /** | |
| * Set the title. | |
| * | |
| * @param string $title | |
| */ | |
| public function setTitle($title) | |
| { | |
| $this->title = $title; | |
| } | |
| /** | |
| * Set the author. | |
| * | |
| * @param string $author | |
| */ | |
| public function setAuthor($author) | |
| { | |
| $this->author = $author; | |
| } | |
| /** | |
| * Get the isbn. | |
| */ | |
| public function getIsbn() | |
| { | |
| return $this->isbn; | |
| } | |
| /** | |
| * Get the title. | |
| */ | |
| public function getTitle() | |
| { | |
| return $this->title; | |
| } | |
| /** | |
| * Get the author. | |
| */ | |
| public function getAuthor() | |
| { | |
| return $this->author; | |
| } | |
| } |
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| <?php | |
| namespace Mitsubachi\BookShelf; | |
| class BookShelf | |
| { | |
| /** | |
| * Bookオブジェクトの配列 | |
| * | |
| * @var array | |
| */ | |
| private $books; | |
| /** | |
| * BookShelf constructor. | |
| * | |
| * @param array $books | |
| */ | |
| public function __construct($books) | |
| { | |
| $this->books = $books; | |
| } | |
| /** | |
| * 蔵書を検索し、条件に一致するBookオブジェクトの配列を返す | |
| * | |
| * @param array $conditions | |
| * @return array | |
| */ | |
| public function search($conditions) | |
| { | |
| $callback = $this->createSearchBookFunction($conditions); | |
| return array_filter($this->books, $callback); | |
| } | |
| /** | |
| * 検索条件$conditionから、Bookが検索条件に適合するかどうかを判定する関数を生成する | |
| * | |
| * @param array $conditions | |
| * @return Closure | |
| */ | |
| private function createSearchBookFunction($conditions) | |
| { | |
| $predicates = []; // Closure[] 配列の要素１つ１つが検索条件に合っているかどうかのboolean値を返す関数である | |
| if (isset($conditions['isbn'])) $predicates[] = function ($book) use ($conditions) { return $book->getIsbn() === $conditions['isbn']; }; // ISBN => 完全一致 | |
| if (isset($conditions['title'])) $predicates[] = function ($book) use ($conditions) { return strpos($book->getTitle(), $conditions['title']) !== false; }; // タイトル => 部分一致 | |
| if (isset($conditions['author'])) $predicates[] = function ($book) use ($conditions) { return strpos($book->getAuthor(), $conditions['author']) !== false; }; // 著者 => 部分一致 | |
| // predicates内の全てのpredicate関数がtrueである場合、searchBookFunction関数はtrueを返す | |
| $searchBookFunction = function ($book) use ($predicates) { | |
| return array_reduce($predicates, function($boolean, $predicate) use ($book) { | |
| return $boolean && $predicate($book); | |
| }, true); | |
| }; | |
| return $searchBookFunction; | |
| } | |
| } |
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| <?php | |
| namespace Mitsubachi\BookShelf; | |
| class Faker | |
| { | |
| public static function isbn() | |
| { | |
| return 'ISBN' . self::number(3) . '-' . self::number(1) . '-' . self::number(4) . '-' . self::number(4) . '-' . self::number(1); | |
| } | |
| public static function number($length) | |
| { | |
| return str_pad(rand(0, pow(10, $length) - 1), $length, '0', STR_PAD_LEFT); | |
| } | |
| public static function title() | |
| { | |
| $language = ['PHP', 'Java', 'Ruby', 'Python']; | |
| $purpose = ['プログラミング', 'によるオブジェクト指向開発', 'で始めるプログラミング', 'で作るWEBアプリケーション']; | |
| $suffix = ['概論', '入門', 'の絵本', 'の基礎', '応用編']; | |
| return $language[array_rand($language)] . $purpose[array_rand($purpose)] . $suffix[array_rand($suffix)]; | |
| } | |
| public static function author() | |
| { | |
| $firstName = ['Philip', 'Carolyn', 'Brian', 'Kevin', 'Pamela']; | |
| $lastName = ['Hill', 'Gonzalez', 'Williams', 'Powell', 'Garcia']; | |
| return $firstName[array_rand($firstName)] . ' ' . $lastName[array_rand($lastName)]; | |
| } | |
| } |
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| <?php | |
| require('Book.php'); | |
| require('Faker.php'); | |
| require('BookShelf.php'); | |
| $books = []; | |
| $total = 100; | |
| $replace = rand(0, $total); | |
| for ($i=1; $i<=$total; $i++) { | |
| $book = new Mitsubachi\BookShelf\Book(); | |
| if ($i === $replace) { | |
| $book->setIsbn('ISBN000-0-0000-0000-0'); | |
| } else { | |
| $book->setIsbn(Mitsubachi\BookShelf\Faker::isbn()); | |
| } | |
| $book->setTitle(Mitsubachi\BookShelf\Faker::title()); | |
| $book->setAuthor(Mitsubachi\BookShelf\Faker::author()); | |
| $books[] = $book; | |
| } | |
| $shelf = new Mitsubachi\BookShelf\BookShelf($books); | |
| $book1 = $shelf->search(['isbn' => 'ISBN000-0-0000-0000-0']); | |
| var_dump($book1); | |
| echo '=====' . PHP_EOL; | |
| $book2 = $shelf->search(['title' => 'オブジェクト指向']); | |
| var_dump($book2); | |
| echo '=====' . PHP_EOL; | |
| $book3 = $shelf->search(['author' => 'Williams']); | |
| var_dump($book3); |
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