From 7520256f124feb30c3974639c0c43e6695fedcef Mon Sep 17 00:00:00 2001
From: Alexander Bocken <alexander@bocken.org>
Date: Sun, 19 Apr 2020 10:01:39 +0200
Subject: [PATCH] Fixed isseues raised by bash conversion, added a blacklist
 feature

---
 bthandler | 26 ++++++++++++++------------
 1 file changed, 14 insertions(+), 12 deletions(-)

diff --git a/bthandler b/bthandler
index f753d5e..54b1e09 100755
--- a/bthandler
+++ b/bthandler
@@ -2,20 +2,22 @@
 #wait time to discover new devices in seconds
 SCAN_PERIOD=5
 BLACKLIST=$HOME/.local/bin/tools/bt_blacklist
-
 IDS=$(bluetoothctl paired-devices | awk '{print $2}')
 echo $IDS > /tmp/bt_IDS
-Devices=$(bluetoothctl paired-devices | awk '{for (i=3; i<NF; i++) printf $i " "; print $NF}' | sed 's/ $//')
-echo $Devices > /tmp/bt_devices
-Blacklist='MX Master\n'
-Devices=$( echo $Devices | grep -vf $BLACKLIST )
-actions="\nturn off\nturn on\nscan on\npair"
-choice=$( printf "$Devices$actions" | dmenu -i -p 'What BT action would you like to perform:' )
+bluetoothctl paired-devices | awk '{for (i=3; i<NF; i++) printf $i " "; print $NF}' > /tmp/bt_devices
+Devices=$(cat /tmp/bt_devices)
+disp_devices=$(cat /tmp/bt_devices)
+grep -vf "$BLACKLIST" /tmp/bt_devices > /tmp/disp_devices
+len=$(cat /tmp/disp_devices | wc -l)
+actions="turn off\nturn on\nscan on\npair"
+[ $len -gt 0 ] && choice=$( printf "$(cat /tmp/disp_devices)\n$actions" | dmenu -i -p 'What BT action would you like to perform:' )
+[ $len -eq 0 ] && choice=$( printf "$actions" | dmenu -i -p 'What BT action would you like to perform:' )
 
 cleanup(){
 	rm -f /tmp/bt_devices
 	rm -f /tmp/bt_IDS
 	rm -f /tmp/paired_devices
+	rm -f /tmp/disp_devices
 	exit
 }
 
@@ -32,13 +34,13 @@ case $choice in
 		bluetoothctl scan on & disown
 		notify-send "Bluetooth" "Searching for devices, please wait a bit"
 		sleep $SCAN_PERIOD
-		all_devices=$(bluetoothctl devices | awk '{for (i=3; i<NF; i++) printf $i " "; print $NF}')
+		bluetoothctl devices | awk '{for (i=3; i<NF; i++) printf $i " "; print $NF}' > /tmp/bt_devices
 		bluetoothctl paired-devices | awk '{for (i=3; i<NF; i++) printf $i " "; print $NF}' > /tmp/paired_devices
-		new_devices=$(echo $all_devices | grep -vf /tmp/paired_devices)
-		choice=$( echo $new_devices | dmenu -l 10 -p 'pair with which device?:' )
+		grep -vf /tmp/paired_devices /tmp/bt_devices > /tmp/new_devices
+		choice=$( cat /tmp/new_devices | dmenu -l 10 -p 'pair with which device?:' )
 		if [ -n "$choice" ]; then
 			bluetoothctl devices | awk '{print $2}' > /tmp/bt_IDS
-			dev_no=$(echo $all_devices | cat -n | grep "$choice" | awk '{print $1}')
+			dev_no=$(cat -n /tmp/bt_devices | grep "$choice" | awk '{print $1}')
 			dev_id=$(cat -n /tmp/bt_IDS | grep -E $dev_no"[[:space:]]" | awk '{print $2}' )
 
 			bluetoothctl pair $dev_id && sleep 2
@@ -50,7 +52,7 @@ case $choice in
 esac
 
 if [ -n "$choice" ]; then
-	choice=$( echo $choice | sed 's/ $//')
+#	choice=$( echo $choice | sed 's/ $//')
 	dev_no=$(cat -n /tmp/bt_devices | grep "$choice" | awk '{print $1}')
 	dev_id=$(cat -n /tmp/bt_IDS | grep $dev_no | awk '{print $2}')
 	bluetoothctl power on