From 274fb09ed4374c0732b1a7763a3c675037948822 Mon Sep 17 00:00:00 2001
From: Wim <wim@42.be>
Date: Sat, 23 May 2020 19:15:26 +0200
Subject: Fix forward from hidden users (telegram). Closes #1131 (#1143)

Use ForwardDate to check if a message is forwarded.
If we have a nil ForwardedFrom then make this an unknown user.
---
 bridge/telegram/handlers.go | 36 +++++++++++++++++++++++-------------
 1 file changed, 23 insertions(+), 13 deletions(-)

diff --git a/bridge/telegram/handlers.go b/bridge/telegram/handlers.go
index 56fd6540..f73c8b0f 100644
--- a/bridge/telegram/handlers.go
+++ b/bridge/telegram/handlers.go
@@ -39,22 +39,32 @@ func (b *Btelegram) handleGroups(rmsg *config.Message, message *tgbotapi.Message
 
 // handleForwarded handles forwarded messages
 func (b *Btelegram) handleForwarded(rmsg *config.Message, message *tgbotapi.Message) {
-	if message.ForwardFrom != nil {
-		usernameForward := ""
-		if b.GetBool("UseFirstName") {
-			usernameForward = message.ForwardFrom.FirstName
-		}
-		if usernameForward == "" {
-			usernameForward = message.ForwardFrom.UserName
-			if usernameForward == "" {
-				usernameForward = message.ForwardFrom.FirstName
-			}
-		}
+	if message.ForwardDate == 0 {
+		return
+	}
+
+	if message.ForwardFrom == nil {
+		rmsg.Text = "Forwarded from " + unknownUser + ": " + rmsg.Text
+		return
+	}
+
+	usernameForward := ""
+	if b.GetBool("UseFirstName") {
+		usernameForward = message.ForwardFrom.FirstName
+	}
+
+	if usernameForward == "" {
+		usernameForward = message.ForwardFrom.UserName
 		if usernameForward == "" {
-			usernameForward = unknownUser
+			usernameForward = message.ForwardFrom.FirstName
 		}
-		rmsg.Text = "Forwarded from " + usernameForward + ": " + rmsg.Text
 	}
+
+	if usernameForward == "" {
+		usernameForward = unknownUser
+	}
+
+	rmsg.Text = "Forwarded from " + usernameForward + ": " + rmsg.Text
 }
 
 // handleQuoting handles quoting of previous messages
-- 
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