Initial commit

Services/PostResolver.cs

@@ -0,0 +1,34 @@
+using System.Text.Json;
+using Microsoft.Extensions.Logging;
+using mstdnCats.Models;
+
+namespace mstdnCats.Services
+{
+    public sealed class PostResolver
+    {
+
+        public static async Task<List<Post>?> GetPostsAsync(string tag, ILogger<MastodonBot>? logger, string instance = "https://haminoa.net")
+        {
+            // Get posts
+            HttpClient _httpClient = new HttpClient();
+            // Get posts from mastodon api (40 latest posts)
+            var response = await _httpClient.GetAsync($"{instance}/api/v1/timelines/tag/{tag}?limit=40");
+
+            // Print out ratelimit info
+            logger?.LogInformation("Remaining requests: " + response.Headers.GetValues("X-RateLimit-Remaining").First() + "time to reset: " + response.Headers.GetValues("X-RateLimit-Reset").First());
+
+            // Check if response is ok
+            if (
+                response.StatusCode == System.Net.HttpStatusCode.OK ||
+                response.Content.Headers.ContentType.MediaType.Contains("application/json") ||
+                response.Headers.TryGetValues("X-RateLimit-Remaining", out var remaining) && int.Parse(remaining.First()) != 0
+                )
+            {
+                // Deserialize response based on 'Post' model
+                return JsonSerializer.Deserialize<List<Post>>(await response.Content.ReadAsStringAsync());
+            }
+
+            else return null;
+        }
+    }
+}