feat: improve telegram session posts

src/GmRelay.Bot/Features/Sessions/CreateSession/NewSessionCommandParser.cs

@@ -5,6 +5,7 @@ namespace GmRelay.Bot.Features.Sessions.CreateSession;
 internal sealed record NewSessionParseResult(
     string? Title,
     string? Link,
+    string? ImageUrl,
     int? MaxPlayers,
     IReadOnlyList<DateTimeOffset> ScheduledTimes,
     IReadOnlyList<string> PastTimeInputs,
@@ -27,6 +28,12 @@ internal static class NewSessionCommandParser
     private const string TitlePrefix = "\u041d\u0430\u0437\u0432\u0430\u043d\u0438\u0435:";
     private const string TimePrefix = "\u0412\u0440\u0435\u043c\u044f:";
     private const string LinkPrefix = "\u0421\u0441\u044b\u043b\u043a\u0430:";
+    private static readonly string[] ImagePrefixes =
+    [
+        "\u041a\u0430\u0440\u0442\u0438\u043d\u043a\u0430:",
+        "\u0418\u0437\u043e\u0431\u0440\u0430\u0436\u0435\u043d\u0438\u0435:",
+        "\u041e\u0431\u043b\u043e\u0436\u043a\u0430:"
+    ];
     private static readonly string[] SeatLimitPrefixes =
     [
         "\u041c\u0435\u0441\u0442:",
@@ -49,6 +56,7 @@ internal static class NewSessionCommandParser
     {
         string? title = null;
         string? link = null;
+        string? imageUrl = null;
         int? maxPlayers = null;
         int? recurringCount = null;
         var recurringIntervalDays = 7;
@@ -72,6 +80,14 @@ internal static class NewSessionCommandParser
                 continue;
             }
 
+            var imagePrefix = ImagePrefixes.FirstOrDefault(prefix =>
+                line.StartsWith(prefix, StringComparison.OrdinalIgnoreCase));
+            if (imagePrefix is not null)
+            {
+                imageUrl = line[imagePrefix.Length..].Trim();
+                continue;
+            }
+
             var seatLimitPrefix = SeatLimitPrefixes.FirstOrDefault(prefix =>
                 line.StartsWith(prefix, StringComparison.OrdinalIgnoreCase));
             if (seatLimitPrefix is not null)
@@ -157,6 +173,7 @@ internal static class NewSessionCommandParser
         return new NewSessionParseResult(
             title,
             link,
+            imageUrl,
             maxPlayers,
             scheduledTimes,
             pastTimeInputs,