Reorganize root folder structure: Remove apps layer layer

backend/src/Host/Controllers/TelegramImportController.cs

@@ -0,0 +1,64 @@
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Http;
+using MediatR;
+using Host.Models;
+using Knot.Shared.Kernel;
+using Knot.Modules.Chats.Application.TelegramImport;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace Host.Controllers;
+
+[Authorize]
+[ApiController]
+[Route("api/import/telegram")]
+public sealed class TelegramImportController : ControllerBase
+{
+    private readonly ISender _sender;
+    private readonly IUserContext _userContext;
+
+    public TelegramImportController(ISender sender, IUserContext userContext)
+    {
+        _sender = sender;
+        _userContext = userContext;
+    }
+
+    [HttpPost("analyze")]
+    [DisableRequestSizeLimit]
+    [RequestFormLimits(MultipartBodyLengthLimit = 10L * 1024 * 1024 * 1024)] // 10GB for big exports
+    public async Task<IActionResult> Analyze(IFormFile file, CancellationToken ct)
+    {
+        if (file == null)
+        {
+            return BadRequest("No file uploaded.");
+        }
+
+        using var stream = file.OpenReadStream();
+        var command = new AnalyzeImportCommand(stream, file.FileName);
+        
+        var result = await _sender.Send(command, ct);
+        
+        if (result.IsFailure)
+        {
+            return BadRequest(result.Error.Description ?? result.Error.Code);
+        }
+
+        return Ok(result.Value);
+    }
+
+    [HttpPost("execute")]
+    public async Task<IActionResult> Execute([FromBody] ExecuteImportRequest req, CancellationToken ct)
+    {
+        var command = new ExecuteImportCommand(_userContext.UserId, req.Token, req.Mapping, req.GroupName);
+        
+        var result = await _sender.Send(command, ct);
+
+        if (result.IsFailure)
+        {
+            return BadRequest(result.Error.Description ?? result.Error.Code);
+        }
+
+        return Ok(result.Value);
+    }
+}