feat: resolve nip5 for OG tags

NostrServices/Controllers/OpenGraphController.cs

@@ -1,6 +1,7 @@
 using AngleSharp;
 using AngleSharp.Dom;
 using Microsoft.AspNetCore.Mvc;
+using Newtonsoft.Json;
 using Nostr.Client.Identifiers;
 using Nostr.Client.Messages;
 using Nostr.Client.Utils;
@@ -17,11 +18,14 @@ public class OpenGraphController : Controller
 {
     private readonly ILogger<OpenGraphController> _logger;
     private readonly RedisStore _redisStore;
+    private readonly HttpClient _httpClient;
 
-    public OpenGraphController(ILogger<OpenGraphController> logger, RedisStore redisStore)
+    public OpenGraphController(ILogger<OpenGraphController> logger, RedisStore redisStore, HttpClient httpClient)
     {
         _logger = logger;
         _redisStore = redisStore;
+        _httpClient = httpClient;
+        _httpClient.Timeout = TimeSpan.FromSeconds(2);
     }
 
     /// <summary>
@@ -51,11 +55,13 @@ public class OpenGraphController : Controller
             }
         }
 
-        if (NostrIdentifierParser.TryParse(id, out var nid) || (nid = NostrBareIdentifier.Parse(id)) != default)
+        if ((NostrIdentifierParser.TryParse(id, out var nid) && nid != default) ||
+            (nid = NostrBareIdentifier.Parse(id)) != default ||
+            (nid = await TryParseNip05(id, cts)) != default)
         {
             try
             {
-                if (nid!.Hrp is "nevent" or "note" or "naddr")
+                if (nid.Hrp is "nevent" or "note" or "naddr")
                 {
                     var ev = await _redisStore.GetEvent(nid);
                     if (ev != default)
@@ -105,7 +111,7 @@ public class OpenGraphController : Controller
         {
             case (long)NostrKind.LiveEvent:
             {
-                var host = ev.Tags.FirstOrDefault(a => a is {Key: "p", Values: [_, _, "host", ..]})?.Values[1] ?? ev.PubKey.ToHex();
+                var host = ev.Tags.FirstOrDefault(a => a is {Key: "p", Values: [_, _, "host"]})?.Values[1] ?? ev.PubKey.ToHex();
                 var hostProfile = await _redisStore.GetProfile(host);
                 var hostName = hostProfile?.Name ?? profile?.Name ?? "Nostrich";
                 var stream = ev.GetFirstTagValue("streaming") ?? ev.GetFirstTagValue("recording") ?? "";
@@ -164,7 +170,7 @@ public class OpenGraphController : Controller
 
     private async Task<CachedMeta?> GetProfileMeta(CompactProfile? profile)
     {
-        var titleContent = $"Snort - {profile?.Name ?? "Nostrich"}'s Profile";
+        var titleContent = $"{profile?.Name ?? "Nostrich"}'s Profile";
         var aboutContent = profile?.About?.Length > 160 ? profile.About[..160] : profile?.About ?? "";
         var imageContent = profile?.Picture ?? "https://snort.social/nostrich_512.png";
         return new CachedMeta
@@ -211,6 +217,37 @@ public class OpenGraphController : Controller
     }
 
     record HeadElement(string Element, List<KeyValuePair<string, string>> Attributes);
+
+    private async Task<NostrIdentifier?> TryParseNip05(string id, CancellationToken cts)
+    {
+        try
+        {
+            if (id.Contains("@"))
+            {
+                var idSplit = id.Split("@");
+                var url = new Uri($"https://{idSplit[1]}/.well-known/nostr.json?name={Uri.EscapeDataString(idSplit[0])}");
+                var json = await _httpClient.GetStringAsync(url, cts);
+                var parsed = JsonConvert.DeserializeObject<NostrJson>(json);
+                var match = parsed?.Names?.FirstOrDefault(a => a.Key.Equals(idSplit[0], StringComparison.CurrentCultureIgnoreCase));
+                if (match.HasValue && !string.IsNullOrEmpty(match.Value.Value))
+                {
+                    return new NostrProfileIdentifier(match.Value.Value.ToLower(), null);
+                }
+            }
+        }
+        catch (Exception ex)
+        {
+            _logger.LogWarning("Failed to parse nostr address {id} {msg}", id, ex.Message);
+        }
+
+        return default;
+    }
+
+    class NostrJson
+    {
+        [JsonProperty("names")]
+        public Dictionary<string, string>? Names { get; init; } = new();
+    }
 }
 
 [ProtoContract]