refactor(Application.Abstractions): umbenennen in Abstractions.Application

DigitalData.Core.Abstraction.Application/Repository/IReadQuery.cs

@@ -0,0 +1,85 @@
+using System.Linq.Expressions;
+
+namespace DigitalData.Core.Abstraction.Application.Repository;
+
+/// <summary>
+/// Provides methods for executing common queries on a given entity type.
+/// This interface abstracts away the direct usage of ORM libraries (such as Entity Framework) for querying data
+/// and provides asynchronous and synchronous operations for querying a collection or single entity.
+/// </summary>
+/// <typeparam name="TEntity">The type of the entity being queried.</typeparam>
+public interface IReadQuery<TEntity>
+{
+    /// <summary>
+    /// Adds a filter to the query using the specified predicate expression.
+    /// This method allows chaining multiple filter conditions to refine the query results.
+    /// </summary>
+    /// <param name="expression">An expression that defines the filter condition for the entity.</param>
+    /// <returns>The current <see cref="IReadQuery{TEntity}"/> instance with the applied filter.</returns>
+    public IReadQuery<TEntity> Where(Expression<Func<TEntity, bool>> expression);
+
+    /// <summary>
+    /// Asynchronously retrieves the first entity or a default value if no entity is found.
+    /// </summary>
+    /// <param name="cancellation">A <see cref="CancellationToken"/> to observe while waiting for the task to complete.</param>
+    /// <returns>A task that represents the asynchronous operation. The task result contains the entity or a default value.</returns>
+    public Task<TEntity?> FirstOrDefaultAsync(CancellationToken cancellation = default);
+
+    /// <summary>
+    /// Asynchronously retrieves a single entity or a default value if no entity is found.
+    /// </summary>
+    /// <param name="cancellation">A <see cref="CancellationToken"/> to observe while waiting for the task to complete.</param>
+    /// <returns>A task that represents the asynchronous operation. The task result contains the entity or a default value.</returns>
+    public Task<TEntity?> SingleOrDefaultAsync(CancellationToken cancellation = default);
+
+    /// <summary>
+    /// Asynchronously retrieves a list of entities.
+    /// </summary>
+    /// <param name="cancellation">A <see cref="CancellationToken"/> to observe while waiting for the task to complete.</param>
+    /// <returns>A task that represents the asynchronous operation. The task result contains the list of entities.</returns>
+    public Task<IEnumerable<TEntity>> ToListAsync(CancellationToken cancellation = default);
+
+    /// <summary>
+    /// Asynchronously retrieves the first entity. Throws an exception if no entity is found.
+    /// </summary>
+    /// <param name="cancellation">A <see cref="CancellationToken"/> to observe while waiting for the task to complete.</param>
+    /// <returns>A task that represents the asynchronous operation. The task result contains the first entity.</returns>
+    public Task<TEntity> FirstAsync(CancellationToken cancellation = default);
+
+    /// <summary>
+    /// Asynchronously retrieves a single entity. Throws an exception if no entity is found.
+    /// </summary>
+    /// <param name="cancellation">A <see cref="CancellationToken"/> to observe while waiting for the task to complete.</param>
+    /// <returns>A task that represents the asynchronous operation. The task result contains the single entity.</returns>
+    public Task<TEntity> SingleAsync(CancellationToken cancellation = default);
+
+    /// <summary>
+    /// Synchronously retrieves the first entity or a default value if no entity is found.
+    /// </summary>
+    /// <returns>The first entity or a default value.</returns>
+    public TEntity? FirstOrDefault();
+
+    /// <summary>
+    /// Synchronously retrieves a single entity or a default value if no entity is found.
+    /// </summary>
+    /// <returns>The single entity or a default value.</returns>
+    public TEntity? SingleOrDefault();
+
+    /// <summary>
+    /// Synchronously retrieves a list of entities.
+    /// </summary>
+    /// <returns>The list of entities.</returns>
+    public IEnumerable<TEntity> ToList();
+
+    /// <summary>
+    /// Synchronously retrieves the first entity. Throws an exception if no entity is found.
+    /// </summary>
+    /// <returns>The first entity.</returns>
+    public TEntity First();
+
+    /// <summary>
+    /// Synchronously retrieves a single entity. Throws an exception if no entity is found.
+    /// </summary>
+    /// <returns>The single entity.</returns>
+    public TEntity Single();
+}