#!/bin/bash

#script to list available SSID and mod wpa-supplicant
#file to connect to new wifi hotspot
#this script works in conjuction with autohotspot
#http://www.raspberryconnect.com/network/item/330-raspberry-pi-auto-wifi-hotspot-switch-internet
#km4ack 20190401
#edited 20200221

mkdir -p $HOME/temp
TEMPFILE=$HOME/temp/tempwifi

# Generate List of Available SSIDs
SSID_LIST () {
LIST=$(sudo iw dev "wlan0" scan ap-force | egrep "^BSS|SSID:" | grep SSID: | sed 's/SSID://' | awk '{ print $1 }' )
clear;echo;echo
echo "These SSID's are available"
echo
echo "$LIST" | sed '/^$/d'
#ask user about hotspots
echo
echo "1 to refresh the list, 2 to exit or"
echo "Enter name of SSID would you like add?"
read SSID
if [ $SSID == "1" ]
then
clear;echo;echo
echo "Scanning for WiFi again...please wait"
SSID_LIST
elif [ $SSID == "2" ]
then
echo "Goodbye"
exit
fi
}

#print list on screen
clear;echo;echo
echo "Scanning for Wifi.....please wait"
SSID_LIST

#get SSID password
echo
echo "What is the password for the hotspot?"
read PASS

#verify you want to add the hotspot
echo
echo "SSID = "$SSID
echo "Password = "$PASS
echo "REMEMBER THIS IS CASE SENSITIVE"
echo "Is this correct? y/n"
read ANSWER

#make the change to wpa_supplicant.conf
if [ $ANSWER == "y" ] || [ $ANSWER == "Y" ]
then
cat > $TEMPFILE <<EOF
network={
ssid="$SSID"
psk="$PASS"
key_mgmt=WPA-PSK
}
EOF
cat $TEMPFILE |sudo tee -a /etc/wpa_supplicant/wpa_supplicant.conf
rm $TEMPFILE
echo "attempting to connect to new wifi"
sudo /usr/bin/autohotspotN
else
clear;echo;echo;
echo "Scanning for WiFi.....please wait"
SSID_LIST
fi