Implemented importing and exporting of stars

MoonlightServers.ApiServer/Http/Controllers/Admin/Stars/StarImportExportController.cs

@@ -0,0 +1,52 @@
+using System.Text;
+using Microsoft.AspNetCore.Mvc;
+using MoonCore.Attributes;
+using MoonCore.Exceptions;
+using MoonCore.Helpers;
+using MoonlightServers.ApiServer.Services;
+using MoonlightServers.Shared.Http.Responses.Admin.Stars;
+
+namespace MoonlightServers.ApiServer.Http.Controllers.Admin.Stars;
+
+[ApiController]
+[Route("api/admin/servers/stars")]
+public class StarImportExportController : Controller
+{
+    private readonly StarImportExportService ImportExportService;
+
+    public StarImportExportController(StarImportExportService importExportService)
+    {
+        ImportExportService = importExportService;
+    }
+
+    [HttpGet("{starId:int}/export")]
+    [RequirePermission("admin.servers.stars.get")]
+    public async Task Export([FromRoute] int starId)
+    {
+        var exportedStar = await ImportExportService.Export(starId);
+
+        Response.StatusCode = 200;
+        Response.ContentType = "application/json";
+        await Response.WriteAsync(exportedStar);
+    }
+
+    [HttpPost("import")]
+    [RequirePermission("admin.servers.stars.create")]
+    public async Task<StarDetailResponse> Import()
+    {
+        if (Request.Form.Files.Count == 0)
+            throw new HttpApiException("No file to import provided", 400);
+        
+        if (Request.Form.Files.Count > 1)
+            throw new HttpApiException("Only one file to import allowed", 400);
+
+        var file = Request.Form.Files[0];
+        await using var stream = file.OpenReadStream();
+        using var sr = new StreamReader(stream, Encoding.UTF8);
+        var content = await sr.ReadToEndAsync();
+
+        var star = await ImportExportService.Import(content);
+
+        return Mapper.Map<StarDetailResponse>(star);
+    }
+}