Dodaj pliki projektów.

2024-11-25 22:42:31 +01:00
parent 133b8199db
commit 7581d5df42
58 changed files with 1644 additions and 0 deletions
@@ -0,0 +1,37 @@
+using System.Collections.Generic;
+using System.Data;
+using System.Threading.Tasks;
+using DatabaseConnection.Model;
+
+namespace DatabaseConnection.Services
+{
+    public class BookService
+    {
+        private readonly DatabaseService databaseService;
+
+        public BookService(DatabaseService databaseService) => this.databaseService = databaseService;
+
+        public async Task<List<Book>> GetBooks()
+        {
+            List<Book> books = [];
+
+            var table = await databaseService.ExecuteQuery("SELECT id_ksiazka, tytul, GROUP_CONCAT(imie, ' ', nazwisko) as autor, kategoria.nazwa, wydawca, data_publikacji, cena, ilosc FROM ksiazki, autorzy_ksiazek, kategoria WHERE ksiazki.id_kategoria = kategoria.id_kategoria AND ksiazki.id_autor = autorzy_ksiazek.id_autor GROUP BY tytul");
+            foreach (DataRow row in table.Rows)
+            {
+                books.Add(new Book
+                {
+                    Id = Convert.ToInt32(row["id_ksiazka"]),
+                    Title = row["tytul"].ToString(),
+                    Author = row["autor"].ToString(),
+                    Category = row["nazwa"].ToString(),
+                    Publisher = row["wydawca"].ToString(),
+                    PublishDate = row["data_publikacji"].ToString(),
+                    Price = Convert.ToDouble(row["cena"]),
+                    Amount = Convert.ToInt32(row["ilosc"])
+                });
+            }
+
+            return books;
+        }
+    }
+}