Add real workspace channels

backend/src/Socialize.Api/Modules/Channels/Handlers/GetChannels.cs

@@ -0,0 +1,52 @@
+using FastEndpoints;
+using Microsoft.EntityFrameworkCore;
+using Socialize.Api.Data;
+using Socialize.Api.Infrastructure.Security;
+using Socialize.Api.Modules.Channels.Data;
+
+namespace Socialize.Api.Modules.Channels.Handlers;
+
+public record GetChannelsRequest(Guid? WorkspaceId);
+
+public class GetChannelsHandler(
+    AppDbContext dbContext,
+    AccessScopeService accessScopeService)
+    : Endpoint<GetChannelsRequest, IReadOnlyCollection<ChannelDto>>
+{
+    public override void Configure()
+    {
+        Get("/api/channels");
+        Options(o => o.WithTags("Channels"));
+    }
+
+    public override async Task HandleAsync(GetChannelsRequest request, CancellationToken ct)
+    {
+        IQueryable<Channel> query = dbContext.Channels.AsQueryable();
+
+        if (!accessScopeService.IsManager(User))
+        {
+            IReadOnlyCollection<Guid> workspaceScopeIds = await accessScopeService.GetAccessibleWorkspaceIdsAsync(User, ct);
+            query = query.Where(channel => workspaceScopeIds.Contains(channel.WorkspaceId));
+        }
+
+        if (request.WorkspaceId.HasValue)
+        {
+            query = query.Where(channel => channel.WorkspaceId == request.WorkspaceId.Value);
+        }
+
+        List<ChannelDto> channels = await query
+            .OrderBy(channel => channel.Network)
+            .ThenBy(channel => channel.Name)
+            .Select(channel => new ChannelDto(
+                channel.Id,
+                channel.WorkspaceId,
+                channel.Name,
+                channel.Network,
+                channel.Handle,
+                channel.ExternalUrl,
+                channel.CreatedAt))
+            .ToListAsync(ct);
+
+        await SendOkAsync(channels, ct);
+    }
+}