Antarmuka Admin

Termasuk bagian Pemrograman Berorientasi Objek dalam perjalanan GDScript di Coddy. Pelajaran 60 dari 65.

Tantangan

Sedang

Berikan pustakawan laporan statistik. Pertahankan semua yang kamu tulis pada langkah sebelumnya; hanya library.gd yang berubah.

Tulis get_statistics() -> Dictionary di Library. Fungsi ini mengembalikan dictionary dengan lima nilai int:

"total_books": jumlah buku
"available_books": buku yang nilai available-nya adalah true
"borrowed_books": buku yang sedang dipinjam
"total_users": jumlah pengguna
"users_with_books": pengguna yang memiliki setidaknya satu buku pinjaman

Kode yang disediakan menambahkan perintah stats, yang mencetak kelima nilai tersebut. Untuk input ini:

Community
book The Great Gatsby|F. Scott Fitzgerald|123456
book To Kill a Mockingbird|Harper Lee|789012
book 1984|George Orwell|345678
user U001|Alice
user U002|Bob
user U003|Charlie
borrow 123456|U001
borrow 789012|U001
borrow 345678|U002
stats

output-nya adalah:

Book borrowed successfully
Book borrowed successfully
Book borrowed successfully
Total Books: 3
Available Books: 0
Borrowed Books: 3
Total Users: 3
Users with Books: 2

Kodemu ditulis di book.gd, user.gd, dan library.gd. main.gd berisi kode input/output yang disediakan dan tidak boleh diedit.

Coba sendiri

extends Node

func _ready():
	# Kode input/output yang disediakan: biarkan apa adanya
	var library := Library.new(OS.read_string_from_stdin())
	var line := OS.read_string_from_stdin()
	while line != "":
		var parts := line.split(" ", true, 1)
		var fields: PackedStringArray = parts[1].split("|") if parts.size() > 1 else PackedStringArray()
		match parts[0]:
			"book":
				library.add_book(Book.new(fields[0], fields[1], fields[2]))
			"user":
				library.add_user(User.new(fields[0], fields[1]))
			"borrow":
				print(library.borrow_book(fields[0], fields[1]))
			"search":
				var term: String = parts[1] if parts.size() > 1 else ""
				var found: Array = library.search_by_title(term)
				print("Results for '%s': %d" % [term, found.size()])
				for book in found:
					print("- ", book.title, " by ", book.author)
			"stats":
				var stats: Dictionary = library.get_statistics()
				print("Total Books: ", stats["total_books"])
				print("Available Books: ", stats["available_books"])
				print("Borrowed Books: ", stats["borrowed_books"])
				print("Total Users: ", stats["total_users"])
				print("Users with Books: ", stats["users_with_books"])
			"loans":
				var reader: User = library.find_user(fields[0])
				print(reader.user_name, " has borrowed:")
				for isbn in reader.borrowed_isbns:
					print("- ", library.find_book(isbn).title)
			"holder":
				var book: Book = library.find_book(fields[0])
				if book.available:
					print(book.title, " is on the shelf")
				else:
					print(book.title, " is borrowed by ", library.find_user(book.borrower_id).user_name)
			"books":
				for book in library.books:
					print(book)
			"users":
				for user in library.users:
					print(user)
			"show":
				print(library)
		line = OS.read_string_from_stdin()