ActiveUsernames helpers

Github action telegram-api

.github/workflows/telegram-api.yml

@@ -0,0 +1,22 @@
+name: 'Telegram API issues'
+
+on:
+  issues:
+    types: [labeled]
+
+permissions:
+  issues: write
+
+jobs:
+  action:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: dessant/support-requests@v3.0.0
+        with:
+          support-label: 'telegram api'
+          issue-comment: >
+            **Github Issues** should be used only for problems with the library itself.
+            
+            Questions about Telegram API usage should be asked on **StackOverflow** so the whole community can help and benefit.
+            Click here to open a question: https://stackoverflow.com/questions/ask?tags=c%23+wtelegramclient+telegram-api
+          close-issue: true

src/TL.Helpers.cs

@@ -169,6 +169,18 @@ namespace TL
 		/// <summary>An estimation of the number of days ago the user was last seen (Online=0, Recently=1, LastWeek=5, LastMonth=20, LongTimeAgo=150)</summary>
 		public TimeSpan LastSeenAgo => status?.LastSeenAgo ?? TimeSpan.FromDays(150);
 		public bool IsBot => (flags & Flags.bot) != 0;
+		public IEnumerable<string> ActiveUsernames
+		{
+			get
+			{
+				if (username != null)
+					yield return username;
+				if (usernames != null)
+					foreach (var un in usernames)
+						if (un.flags.HasFlag(Username.Flags.active))
+							yield return un.username;
+			}
+		}
 	}
 
 	/// <remarks>a <c>null</c> value means <a href="https://corefork.telegram.org/constructor/userStatusEmpty">userStatusEmpty</a> = last seen a long time ago, more than a month (or blocked/deleted users)</remarks>