using Microsoft.EntityFrameworkCore;
using MySqlConnector;

namespace ErsatzTV.Infrastructure.MySql.Data;

/// <summary>
///     Classifies MySQL provider exceptions wrapped by EF Core. Wired to
///     <see cref="ErsatzTV.Infrastructure.Data.TvContext.IsUniqueConstraintViolation" /> at startup.
/// </summary>
public static class MySqlErrorClassifier
{
    // ER_DUP_ENTRY (1062): a duplicate value for a PRIMARY KEY or UNIQUE index.
    private const int ErDupEntry = 1062;

    public static bool IsUniqueConstraintViolation(DbUpdateException ex) =>
        ex.InnerException is MySqlException { Number: ErDupEntry };
}