feat(api,web): retrieve and display transactions

src/FiscalOS.API/Transactions/Get/Endpoint.cs

@@ -0,0 +1,53 @@
+namespace FiscalOS.API.Transactions.Get;
+
+internal static class Endpoint
+{
+  private const string Route = "/";
+
+  public static RouteHandlerBuilder MapGetEndpoint(this RouteGroupBuilder groupBuilder)
+  {
+    return groupBuilder.MapGet(Route, HandleAsync);
+  }
+
+  private static async Task<IResult> HandleAsync(
+    HttpContext httpContext,
+    PagedQuery pagedQuery,
+    [FromServices] AppDbContext appDbContext,
+    CancellationToken ct
+  )
+  {
+    var pagedQueryValidationResults = pagedQuery.Validate();
+
+    if (pagedQueryValidationResults.Count is not 0)
+    {
+      return Results.ValidationProblem(pagedQueryValidationResults);
+    }
+
+    var userId = httpContext.GetUserId();
+    var query = appDbContext.Transactions
+      .Where(t => t.UserId == userId);
+
+    var transactions = await query
+      .Skip((pagedQuery.PageNumber - 1) * pagedQuery.PageSize)
+      .Take(pagedQuery.PageSize)
+      // TODO: Migrate Date to DateTime
+      // to avoid in-memory sorting
+      .AsAsyncEnumerable()
+      .OrderByDescending(t => t.Date)
+      .ToListAsync(ct);
+
+    var count = await query
+      .Where(t => t.UserId == userId)
+      .CountAsync(ct);
+
+    var transactionDtos = transactions.Select(TransactionDto.From).ToArray();
+    var pagedResponse = PagedResponse<TransactionDto>.From(
+      pagedQuery.PageNumber,
+      pagedQuery.PageSize,
+      count,
+      transactionDtos
+    );
+
+    return Results.Ok(pagedResponse);
+  }
+}