WebApi + ClientApp, GraphQL, Reflection

Events-WebApi/Events.WebAPI.Handlers.EF/QueryHandlers/PeopleLookupQueryHandler.cs

@@ -0,0 +1,48 @@
+using Events.WebAPI.Contract.DTOs;
+using Events.WebAPI.Contract.LookupQueries;
+using Events.WebAPI.Handlers.EF.Data.Postgres;
+using MediatR;
+using Microsoft.EntityFrameworkCore;
+
+namespace Events.WebAPI.Handlers.EF.QueryHandlers;
+
+public class PeopleLookupQueryHandler : IRequestHandler<LookupPeopleQuery, List<IdName<int>>>
+{
+  private readonly EventsContext ctx;
+
+  public PeopleLookupQueryHandler(EventsContext ctx)
+  {
+    this.ctx = ctx;
+  }
+
+  public async Task<List<IdName<int>>> Handle(LookupPeopleQuery request, CancellationToken cancellationToken)
+  {
+    var query = ctx.People.AsNoTracking();
+
+    if (!string.IsNullOrWhiteSpace(request.Text))
+    {
+      string text = request.Text.Trim();
+      query = query.Where(p =>
+        global::Microsoft.EntityFrameworkCore.EF.Functions.ILike(
+          p.FirstNameTranscription + " " + p.LastNameTranscription,
+          $"%{text}%"));
+    }
+
+    if (!string.IsNullOrWhiteSpace(request.CountryCode))
+    {
+      string countryCode = request.CountryCode.Trim();
+      query = query.Where(p => p.CountryCode == countryCode);
+    }
+
+    return await query
+      .OrderBy(p => p.FirstNameTranscription)
+      .ThenBy(p => p.LastNameTranscription)
+      .Select(p => new IdName<int>
+      {
+        Id = p.Id,
+        Name = p.FirstName + " " + p.LastName,
+        Description = p.FirstNameTranscription + " " + p.LastNameTranscription
+      })
+      .ToListAsync(cancellationToken);
+  }
+}