API zum verleihen von Medien
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using System;
using System.Collections.Generic;
using BuecherwurmAPI.Models;
using Microsoft.Data.Sqlite;
using Microsoft.VisualBasic.CompilerServices;
namespace BuecherwurmAPI.Models
{
internal class Katalog : IBookRepo
{
private SqliteConnection _dbConnection;
public Katalog()
{
var connectionBuilder = new SqliteConnectionStringBuilder {DataSource = "LongWormMemory.db"};
_dbConnection = new SqliteConnection(connectionBuilder.ConnectionString);
_dbConnection.Open();
}
public IEnumerable<Book> GetAllBooks()
{
var books= new List<Book>();
using (var command = _dbConnection.CreateCommand())
{
command.CommandText = @"SELECT * FROM Books";
var dataReader = command.ExecuteReader();
while (dataReader.Read())
{
books.Add(new Book
{
Name = (string) dataReader["Books"],
Author = (string) dataReader["Author"],
Country = (string) dataReader["Country"],
Link = (string) dataReader["Link"],
Language = (string) dataReader["Language"],
Pages = (long) dataReader["Pages"],
Year = (long) dataReader["Year"],
ProductId = (long) dataReader["ProductId"],
Category = (CategoryEnum) dataReader["Category"],
ImageLink = (string) dataReader["ImageLink"],
LendTime = (long) dataReader["LendTime"],
LendType = (LendTypeEnum) dataReader["LendType"]
});
}
}
return books;
}
public Book GetBookById(long id)
{
using (var command = _dbConnection.CreateCommand())
{
command.Parameters.Add(new SqliteParameter("@id", SqliteType.Integer)).Value = id;
command.CommandText = @"SELECT * FROM Books WHERE ProductId = @id";
var dataReader = command.ExecuteReader();
var book = new Book
{
Name = (string) dataReader["Books"],
Author = (string) dataReader["Author"],
Country = (string) dataReader["Country"],
Link = (string) dataReader["Link"],
Language = (string) dataReader["Language"],
Pages = (long) dataReader["Pages"],
Year = (long) dataReader["Year"],
ProductId = (long) dataReader["ProductId"],
Category = (CategoryEnum) dataReader["Category"],
ImageLink = (string) dataReader["ImageLink"],
LendTime = (long) dataReader["LendTime"],
LendType = (LendTypeEnum) dataReader["LendType"]
};
return book;
}
}
public void DeleteBook(long id)
{
using (var command = _dbConnection.CreateCommand())
{
// funktioniert das so?
command.Parameters.Add(new SqliteParameter("@id", SqliteType.Integer)).Value = id;
command.CommandText = @"DELETE * FROM Books WHERE ProductId= @id";
var dataReader = command.ExecuteReader();
}
}
public void AddBook (Book book)
{
using (var command = _dbConnection.CreateCommand())
{
// funktioniert das so?
command.CommandText = @"INSERT INTO Books (Name, Author, Country, Link, Language, Pages, Year, ProductId, Category, ImageLink, LendTime, LendType) VALUES (book.Name, book.Author, book.Contry, book.Link, book.Language, book.Pages, book.Year, book.ProductId, book.Category, book.ImageLink, book.LendTime, book.LendType)";
command.Parameters.Add(new SqliteParameter("@itemId", lend.ItemId));
command.Parameters.Add(new SqliteParameter("@returnDate", lend.ReturnDate));
command.Parameters.Add(new SqliteParameter("@customer", lend.Customer));
var success = command.ExecuteNonQuery();
if (success == 1)
{
command.CommandText = @"SELECT last_insert_rowid()";
return (long)command.ExecuteScalar();
}
return -1;
}
}
public void EditBook (long id, Book book)
{
using (var command = _dbConnection.CreateCommand())
{
// funktioniert das so?
command.Parameters.Add(new SqliteParameter("@id", SqliteType.Integer)).Value = id;
command.CommandText = @"INSERT INTO Books (Name, Author, Country, Link, Language, Pages, Year, ProductId, Category, ImageLink, LendTime, LendType)VALUES (book.Name, book.Author, book.Contry, book.Link, book.Language, book.Pages, book.Year, book.ProductId, book.Category, book.ImageLink, book.LendTime, book.LendType) WHERE ProductId = @id";
var dataReader = command.ExecuteReader();
}
}
}
}