First Commit

JobTrackerApi/Services/SummarizerService.cs

@@ -0,0 +1,59 @@
+using System;
+using System.Net.Http;
+using System.Text;
+using System.Text.Json;
+using System.Threading.Tasks;
+using Microsoft.Extensions.Caching.Memory;
+
+namespace JobTrackerApi.Services
+{
+    public interface ISummarizerService
+    {
+        Task<string?> SummarizeAsync(string text, int maxLength = 150, int minLength = 30);
+    }
+
+    public class SummarizerService : ISummarizerService
+    {
+        private readonly IHttpClientFactory _httpFactory;
+        private readonly IMemoryCache _cache;
+
+        public SummarizerService(IHttpClientFactory httpFactory, IMemoryCache cache)
+        {
+            _httpFactory = httpFactory;
+            _cache = cache;
+        }
+
+        public async Task<string?> SummarizeAsync(string text, int maxLength = 150, int minLength = 30)
+        {
+            if (string.IsNullOrWhiteSpace(text)) return null;
+
+            var key = $"summ:{text.GetHashCode()}:{maxLength}:{minLength}";
+            if (_cache.TryGetValue<string>(key, out var cached)) return cached;
+
+            var client = _httpFactory.CreateClient("summarizer");
+            var payload = JsonSerializer.Serialize(new { text, max_length = maxLength, min_length = minLength });
+            using var content = new StringContent(payload, Encoding.UTF8, "application/json");
+
+            try
+            {
+                var res = await client.PostAsync("/summarize", content);
+                if (!res.IsSuccessStatusCode) return null;
+
+                using var stream = await res.Content.ReadAsStreamAsync();
+                using var doc = await JsonDocument.ParseAsync(stream);
+                if (doc.RootElement.TryGetProperty("summary", out var el))
+                {
+                    var s = el.GetString();
+                    if (!string.IsNullOrWhiteSpace(s)) _cache.Set(key, s, TimeSpan.FromHours(6));
+                    return s;
+                }
+
+                return null;
+            }
+            catch
+            {
+                return null;
+            }
+        }
+    }
+}