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final add function

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adam 2025-11-08 15:14:48 +01:00
parent aa2c749855
commit 463e3c3530
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using System;
using Microsoft.Data.Sqlite;
class AddRecords
{
public static void AddAuthor(SqliteConnection connection, string name, string surname, DateTime dateOfBirth)
{
string query = "INSERT OR IGNORE INTO Authors (Name, Surname, DateOfBirth) VALUES (@name, @surname, @dob);";
using (var command = new SqliteCommand(query, connection))
{
command.Parameters.AddWithValue("@name", name);
command.Parameters.AddWithValue("@surname", surname);
command.Parameters.AddWithValue("@dob", dateOfBirth.ToString("yyyy-MM-dd"));
command.ExecuteNonQuery();
Console.WriteLine("Author added successfully.");
}
}
public static void AddPublisher(SqliteConnection connection, string name, string state)
{
string query = "INSERT OR IGNORE INTO Publisher (Name, State) VALUES (@name, @state);";
using (var command = new SqliteCommand(query, connection))
{
command.Parameters.AddWithValue("@name", name);
command.Parameters.AddWithValue("@state", state);
command.ExecuteNonQuery();
}
}
public static void AddBook(SqliteConnection connection, string name, int authorId, int publisherId, int year, int total, int available)
{
string query = @"INSERT OR IGNORE INTO Books (Name, AuthorID, PublisherID, YearOfRelease, Total, Available)
VALUES (@name, @author, @publisher, @year, @total, @available);";
using (var command = new SqliteCommand())
{
command.Connection = connection;
try
{
// Check author exists
command.CommandText = "SELECT 1 FROM Authors WHERE ID = @Aid;";
command.Parameters.Clear();
command.Parameters.AddWithValue("@Aid", authorId);
using (var reader = command.ExecuteReader())
{
if (!reader.HasRows)
{
Console.WriteLine($"Author with ID {authorId} does not exist.");
return;
}
}
// Check publisher exists
command.CommandText = "SELECT 1 FROM Publisher WHERE ID = @Pid;";
command.Parameters.Clear();
command.Parameters.AddWithValue("@Pid", publisherId);
using (var reader = command.ExecuteReader())
{
if (!reader.HasRows)
{
Console.WriteLine($"Publisher with ID {publisherId} does not exist.");
return;
}
}
// Insert book
command.CommandText = query;
command.Parameters.Clear();
command.Parameters.AddWithValue("@name", name);
command.Parameters.AddWithValue("@year", year);
command.Parameters.AddWithValue("@total", total);
command.Parameters.AddWithValue("@available", available);
command.Parameters.AddWithValue("@author", authorId);
command.Parameters.AddWithValue("@publisher", publisherId);
command.ExecuteNonQuery();
}
catch (Exception ex)
{
// Log and return so the exception doesn't bubble to the caller
Console.WriteLine($"AddBook failed: {ex.Message}");
return;
}
}
}
public static void AddUser(SqliteConnection connection, string name, string surname)
{
string query = "INSERT OR IGNORE INTO Users (Name, Surname) VALUES (@name, @surname);";
using (var command = new SqliteCommand(query, connection))
{
command.Parameters.AddWithValue("@name", name);
command.Parameters.AddWithValue("@surname", surname);
command.ExecuteNonQuery();
}
}
public static void AddBorrowedBookRecord(SqliteConnection connection, int bookId, int userId, DateTime borrowedDate, int days = 30)
{
string returnDue = borrowedDate.AddDays(days).ToString("yyyy-MM-dd");
string query = @"INSERT OR IGNORE INTO Borrows (DateOfBorrow, ReturnDue, UserID, BookID)
VALUES (@borrowed, @due, @user, @book);";
using (var command = new SqliteCommand())
{
command.Connection = connection;
try
{
// Check user exists
command.CommandText = "SELECT 1 FROM Users WHERE ID = @Uid;";
command.Parameters.Clear();
command.Parameters.AddWithValue("@Uid", userId);
using (var reader = command.ExecuteReader())
{
if (!reader.HasRows)
{
Console.WriteLine($"User with ID {userId} does not exist.");
return;
}
}
// Check book exists
command.CommandText = "SELECT 1 FROM Books WHERE ID = @Bid;";
command.Parameters.Clear();
command.Parameters.AddWithValue("@Bid", bookId);
using (var reader = command.ExecuteReader())
{
if (!reader.HasRows)
{
Console.WriteLine($"Book with ID {bookId} does not exist.");
return;
}
}
// Insert borrow record
command.CommandText = query;
command.Parameters.Clear();
command.Parameters.AddWithValue("@borrowed", borrowedDate.ToString("yyyy-MM-dd"));
command.Parameters.AddWithValue("@due", returnDue);
command.Parameters.AddWithValue("@user", userId);
command.Parameters.AddWithValue("@book", bookId);
command.ExecuteNonQuery();
}
catch (Exception ex)
{
Console.WriteLine($"AddBorrowedBookRecord failed: {ex.Message}");
return;
}
}
}
}