UApi: partial work on filling in wrappers for non-json endpoints

extra/admin-api/Spacebar.UApi/Controllers/GuildStickerController.cs

@@ -0,0 +1,40 @@
+using Microsoft.AspNetCore.Mvc;
+using Spacebar.Interop.Authentication.AspNetCore;
+using Spacebar.Models.Db.Contexts;
+using Spacebar.Models.Db.Models;
+using Spacebar.UApi.Controllers.Messages;
+using Spacebar.UApi.Services;
+
+namespace Spacebar.UApi.Controllers;
+
+[ApiController]
+[Route("/api/v{_}/guilds/{guildId}/stickers/")]
+public class GuildStickerController(ILogger<MessagesController> logger, SpacebarDbContext db, SpacebarAspNetAuthenticationService authService, UApiConfiguration cfg, PermissionService permService) : ControllerBase {
+    // TODO proper response type
+    [HttpPost]
+    public async Task<Sticker> UploadGuildSticker(string guildId, MultipartFormDataContent content) {
+        
+        var sticker = new Sticker() {
+            GuildId = guildId
+        };
+
+        foreach (var item in content) {
+            switch (item.Headers.ContentDisposition.Name.Trim('"')) {
+                case "name":
+                    sticker.Name = await item.ReadAsStringAsync();
+                    break;
+                case "description": 
+                    sticker.Description = await item.ReadAsStringAsync();
+                    break;
+                case "tags": 
+                    sticker.Tags = await item.ReadAsStringAsync();
+                    break;
+                case "file":
+                    var fileContent = await item.ReadAsStreamAsync();
+                    break;
+            }
+        }
+
+        return sticker;
+    }
+}

extra/admin-api/Spacebar.UApi/Controllers/Messages/MessagesController.cs

@@ -0,0 +1,58 @@
+using System.Text.Json.Nodes;
+using System.Text.RegularExpressions;
+using ArcaneLibs;
+using Microsoft.AspNetCore.Mvc;
+using Spacebar.Interop.Authentication.AspNetCore;
+using Spacebar.Models.Db.Contexts;
+using Spacebar.UApi.Services;
+
+namespace Spacebar.UApi.Controllers.Messages;
+
+[ApiController]
+[Route("/api/v{_}/channels/{channelId}/messages")]
+public partial class MessagesController(ILogger<MessagesController> logger, SpacebarDbContext db, SpacebarAspNetAuthenticationService authService, UApiConfiguration cfg) : ControllerBase {
+    [Consumes("multipart/form-data")]
+    [HttpPost]
+    public async Task CreateMessageWithAttachments(string channelId, MultipartFormDataContent formData) {
+        // Generic proxy doesnt work with multipart/form-data for some reason, so handle them specially
+        JsonObject jsonPayload = null!;
+        
+        foreach (var content in formData)
+        {
+            if (content.Headers.ContentDisposition?.Name == "payload_json") {
+                jsonPayload = await content.ReadFromJsonAsync<JsonObject>();
+                break;
+            }
+            if (FileNameRegex().IsMatch(content.Headers.ContentDisposition?.Name ?? "")) {
+                
+                break;
+            }
+            throw new InvalidOperationException("Invalid multipart/form-data payload: missing payload_json or file attachments");
+        }
+        
+        var client = new StreamingHttpClient();
+        var requestMessage = new HttpRequestMessage(
+            new HttpMethod(Request.Method),
+            cfg.FallbackApiEndpoint + Request.Path + Request.QueryString
+        ) {
+            Content = new StreamContent(Request.Body)
+        };
+        Console.WriteLine(requestMessage.RequestUri);
+
+        var responseMessage = await client.SendUnhandledAsync(requestMessage, CancellationToken.None);
+        Response.StatusCode = (int)responseMessage.StatusCode;
+
+        foreach (var header in responseMessage.Headers) Response.Headers[header.Key] = header.Value.ToArray();
+        foreach (var header in responseMessage.Content.Headers) Response.Headers[header.Key] = header.Value.ToArray();
+
+        await responseMessage.Content.CopyToAsync(Response.Body);
+    }
+    
+    [GeneratedRegex(@"files\[\d+\]")]
+    private static partial Regex FileNameRegex();
+
+    private struct CloudUploadTask {
+        public int index;
+        public Task<string> task;
+    }
+}