updated dropdowncalc to use python instead of bc

modified:   .local/bin/bt
	modified:   .local/bin/dropdowncalc

.local/bin/bt

@@ -1,6 +1,6 @@
 #!/bin/sh
 SCAN_PERIOD=5
-AUTOTRUST=false
+AUTOTRUST=false #trust every newly paired device
 AUTOSCAN=true #immediately start scanning when started to speed up pairing process
 #locations of blacklist and hard coded list of paired devices (watch out, need to modify Makefile as well if you want to change these values and still use make install)
 BLACKLIST=${XDG_DATA_HOME:-$HOME/.local/share}/bt/blacklist
@@ -25,10 +25,11 @@ power(){
 	[ "$powerstatus" = "no" ] && [ "$1" = on ] && bluetoothctl power on
 	[ "$powerstatus" = "yes" ] && [ "$1" = off ] && bluetoothctl power off
 }
+
 scan(){
 	scanstatus="$( bluetoothctl show | grep Discovering | awk '{print $2}' )"
 	if [ "$1" = on ]; then
-		#sets variable in case scanning was already on before the start of bt
+		#sets variable in case scanning was no already on before the start of bt
 		[ "$start_scan" = "" ] && start_scan="$( date +'%s' )"
 		if [ "$scanstatus" = "no" ]; then
 			bluetoothctl scan on &
@@ -61,7 +62,9 @@ startup(){
 		scan on
 	fi
 }
-startup &
+
+#Sadly needs to be run without '&' for now, since it otherwise breaks start_scan variable
+startup
 update_pair_list &
 
 # shellcheck disable=SC1091
@@ -111,11 +114,11 @@ pair(){
 		new_devices="$( echo "$all_devices" | awk '{for (i=3; i<NF; i++) printf $i " "; print $NF}' )"
 		bt_IDS="$( echo "$all_devices" | awk '{print $2}' )"
 	else
-		echo "$paired_devices" > /tmp/paired_devices$$
-		filtered_devices="$( echo "$all_devices" | grep -vf "/tmp/paired_devices$$")"
+		#echo "$paired_devices" > /tmp/paired_devices$$
+		filtered_devices="$( echo "$all_devices" | grep -v "$paired_devices")"
 		bt_IDS="$( echo "$filtered_devices" | awk '{print $2}' )"
 		new_devices="$( echo "$filtered_devices" | awk '{for (i=3; i<NF; i++) printf $i " "; print $NF}' )"
-		rm /tmp/paired_devices$$
+		#rm /tmp/paired_devices$$
 	fi
 	[ "$new_devices" = "" ] && options="rescan" || options=$(echo "$new_devices" && echo 'rescan')
 	choice=$( echo "$options" | dmenu -l 10 -i -p 'pair with which device?' )
@@ -169,12 +172,24 @@ case $choice in
 			dev_id=$( echo "$bt_IDS" | nl | grep -P "^.*$dev_no\t" | awk '{print $2}' )
 			bluetoothctl trust "$dev_id"
 		fi;;
-	"disconnect") choice=$( echo "$paired_devices" | dmenu -l 10 -i -p 'remove which paired device?')
-			if [ -n "$choice" ]; then
-				dev_no=$( echo "$paired_devices" | nl | grep -P "[0-9]+\t$choice$" | awk '{print $1}')
-				dev_id=$( echo "$bt_IDS" | nl | grep -P "^.*$dev_no\t" | awk '{print $2}' )
-				bluetoothctl disconnect "$dev_id"
-			fi;;
+	"disconnect")
+		#search through all devices which are connected and only list those as options
+		# shellcheck disable=SC1091
+		connected_devices="$( bluetoothctl devices | awk '{print "bluetoothctl info "$2}' | . /dev/stdin | grep -E '(Alias:|Connected:)' | sed -e  'N;s/\n/;/;s/^.?*Alias: //' | grep "Connected: yes" | awk -F ';' '{print $1}' )"
+		echo "$connected_devices"
+		#only open dmenu prompt if there is more than one connected device
+		if [ "$( echo "$connected_devices" | wc -l )" -gt 1 ]
+		then
+			choice=$( echo "$connected_devices" | dmenu -l 10 -i -p 'remove which paired device?')
+	        else
+			choice="$connected_devices"
+		fi
+		#only there was a choice (instead of canceling the dmenu)
+		if [ -n "$choice" ]; then
+			dev_no=$( echo "$paired_devices" | nl | grep -P "[0-9]+\t$choice$" | awk '{print $1}')
+			dev_id=$( echo "$bt_IDS" | nl | grep -P "^.*$dev_no\t" | awk '{print $2}' )
+			bluetoothctl disconnect "$dev_id"
+		fi;;
 	"blacklist")
 		choice=$( echo "$paired_devices" | dmenu -l 10 -i -p 'blacklist which paired device from selection?')
 		if [ -n "$choice" ]; then

.local/bin/dropdowncalc

@@ -1,3 +1,2 @@
 #!/bin/sh
-
-ifinstalled bc && echo "Welcome to the Calculator." && bc -lq
+ifinstalled python && python -iq -c "print('Welcome to the Calculator'); from numpy import *"