Emoji export

Author: StrangeWill

Api/v0/Controllers/EmojiController.cs

@@ -0,0 +1,43 @@
+namespace devanewbot.Api.v0.Controllers;
+
+using System.IO;
+using System.IO.Compression;
+using System.Linq;
+using System.Net.Http;
+using System.Net.Mime;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Mvc;
+using SlackNet;
+
+[Route("/api/v0/emoji")]
+public class EmojiController : Controller
+{
+    protected ISlackApiClient Client { get; }
+
+    protected IHttpClientFactory HttpClientFactory { get; }
+
+
+    public EmojiController(ISlackApiClient client, IHttpClientFactory httpClientFactory)
+    {
+        Client = client;
+        HttpClientFactory = httpClientFactory;
+    }
+
+    [HttpGet("export")]
+    public async Task<IActionResult> Export()
+    {
+        var emojis = await Client.Emoji.List();
+        using var memoryStream = new MemoryStream();
+        using var archive = new ZipArchive(memoryStream);
+        using var httpClient = HttpClientFactory.CreateClient();
+        foreach (var emoji in emojis.Where(e => !e.Value.StartsWith("alias:")))
+        {
+            var response = await httpClient.GetStreamAsync(emoji.Value);
+            var entry = archive.CreateEntry($"{emoji.Key}.png");
+            var entryStream = entry.Open();
+            await response.CopyToAsync(entryStream);
+        }
+
+        return File(memoryStream, "application/zip", "emoji.zip");
+    }
+}

Program.cs

@@ -33,6 +33,7 @@
 var configuration = builder.Configuration;
 
 builder.Services
+    .AddHttpClient()
     .AddSingleton<Slack>()
     .AddSingleton<Client>()
     .AddTransient<InviteService>()