feat: SQLExecutor-Klasse für die Ausführung von Roh-SQL-Abfragen mit Entity Framework Core hinzufügen

EnvelopeGenerator.Infrastructure/SQLExecutor.cs

@@ -0,0 +1,32 @@
+using EnvelopeGenerator.Application.Contracts.SQLExecutor.cs;
+using Microsoft.EntityFrameworkCore;
+
+namespace EnvelopeGenerator.Infrastructure;
+
+public sealed class SQLExecutor<T> : ISQLExecutor<T> where T : class
+{
+    private readonly EGDbContext _context;
+
+    public SQLExecutor(EGDbContext context)
+    {
+        _context = context;
+    }
+
+    public async Task<T?> ExecuteFirstAsync(string sql, CancellationToken cancellation = default, params object[] parameters)
+        => await _context
+                    .Set<T>()
+                    .FromSqlRaw(sql, parameters)
+                    .FirstOrDefaultAsync(cancellation);
+
+    public async Task<T?> ExecuteSingleAsync(string sql, CancellationToken cancellation = default, params object[] parameters)
+        => await _context
+                    .Set<T>()
+                    .FromSqlRaw(sql, parameters)
+                    .SingleOrDefaultAsync(cancellation);
+
+    public async Task<IEnumerable<T>> ExecuteAllAsync(string sql, CancellationToken cancellation = default, params object[] parameters)
+        => await _context
+                    .Set<T>()
+                    .FromSqlRaw(sql, parameters)
+                    .ToListAsync(cancellation);
+}