From 430f147b1e9fcd79c11761a7dd24b63f58136f12 Mon Sep 17 00:00:00 2001
From: Krzysztof Madejski <krzysztof.madejski@epf.org.pl>
Date: Tue, 12 Feb 2019 16:10:42 +0100
Subject: [PATCH] #475 Config option: Scan QR code on white terminal

---
 bridge/bridge.go            | 10 ++++++++++
 bridge/whatsapp/whatsapp.go |  4 ++--
 matterbridge.toml.sample    |  4 ++++
 3 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/bridge/bridge.go b/bridge/bridge.go
index 6b955a9e..4e705cda 100644
--- a/bridge/bridge.go
+++ b/bridge/bridge.go
@@ -88,6 +88,16 @@ func (b *Bridge) GetBool(key string) bool {
 	return val
 }
 
+func (b *Bridge) GetBoolOrDefault(key string, thedefault bool) bool {
+	val, ok := b.Config.GetBool(b.Account + "." + key)
+	if !ok {
+		if val, ok = b.Config.GetBool("general." + key); !ok {
+			return thedefault
+		}
+	}
+	return val
+}
+
 func (b *Bridge) GetInt(key string) int {
 	val, ok := b.Config.GetInt(b.Account + "." + key)
 	if !ok {
diff --git a/bridge/whatsapp/whatsapp.go b/bridge/whatsapp/whatsapp.go
index b8c6483a..0e5146ec 100644
--- a/bridge/whatsapp/whatsapp.go
+++ b/bridge/whatsapp/whatsapp.go
@@ -159,8 +159,8 @@ func (b *Bwhatsapp) Login() error {
 
 	// TODO qrCode, err := qrcode.Encode(code, qrcode.Low, 256) to encode as image/png
 	// and possibly send it to connected channels (to admin) to authorize the app
-	// TODO invert configured in settings
-	qrChan := qrFromTerminal(true)
+	invert := b.GetBoolOrDefault("QrOnWhiteTerminal", false)
+	qrChan := qrFromTerminal(invert)
 
 	session, err := b.conn.Login(qrChan)
 	if err != nil {
diff --git a/matterbridge.toml.sample b/matterbridge.toml.sample
index f5a20ae8..d5e6aed0 100644
--- a/matterbridge.toml.sample
+++ b/matterbridge.toml.sample
@@ -1162,6 +1162,10 @@ Number="+48111222333"
 # optional (by default the session is stored only in memory, till restarting matterbridge)
 SessionFile="session-48111222333.gob"
 
+# If your terminal is white we need to invert QR code in order for it to be scanned properly
+# optional (default false)
+QrOnWhiteTerminal=true
+
 # Messages will be seen by other WhatsApp contacts as coming from the bridge. Original nick will be part of the message.
 RemoteNickFormat="@{NICK}: "