#!/bin/bash

VERSION=6

#script to change GPS in gpsd file and restart gpsd service
#reference - https://www.linux-magazine.com/Issues/2018/210/Tutorial-gpsd
#11JAN2021 KM4ACK 

LOGO=$HOME/73Linux/data/ico/gps.png

	PASS=$(yad --entry --width=420 --text-align=center --center --title="GPS Update Tool" \
		--image ${LOGO} --window-icon=${LOGO} --image-on-top --separator="|" --item-separator="|" --hide-text \
        --text="Required\rBad password will cause program to exit" \
		--entry-label="Sudo Password*" \
		--button="Continue":2)
	BUT=$?
	if [ ${BUT} = 252 ]; then
		exit
	fi
PASS=$(echo $PASS | awk -F "|" '{print $1}')

#reset sudo timer to prevent false positive
sudo -k
echo "Checking SUDO credentials....standby"
echo $PASS | sudo -S touch /run/user/$UID/sutest

if [ $? = 1 ]; then
	yad --form --width=250 --text-align=center --center --title="Wrong Password" --text-align=center \
		--image ${LOGO} --window-icon=${LOGO} --image-on-top --separator="|" --item-separator="|" \
		--text="<b>Password Incorrect!</b>\rCan't continue" \
		--button=gtk-close
    exit
else 
    echo "Credentials check out....continuing"
fi

#Verify YAD is installed
if ! hash yad 2>/dev/null; then
    echo "Installing YAD....please wait"
    echo $PASS | sudo -S apt install -y yad
fi

#####################################
#	Help File
#####################################
HELP(){
cat <<EOF > /run/user/$UID/gpsintro.txt
GPS Update Tool Version $VERSION by KM4ACK 

This tool allows you to update the required files 
when you change between different GPS units/types.

USB GPS DEVICES:
Multiple USB choices may be available to choose
from if you have several USB devices connected
to your pi. If you have trouble identifying which 
of the choices is your GPS, try  unplugging all 
USB componets except  your GPS and run this script 
again.

STREAM MOBILE PHONE GPS:
Both your pi and your mobile phone MUST be
on the same network for this to function.
To stream your phone GPS you will need an 
app on your phone. For iPhone see
https://itunes.apple.com/us/app/gps-2-ip/id408625926?mt=8
For Android phones see
https://play.google.com/store/apps/details?id=io.github.tiagoshibata.gpsdclient
Set the app in UDP or UDP Push mode. Set the IP
address to be the same as your Raspberry Pi. To
find the IP address of the Pi, run:
hostname -I
from the command line. After choosing "Phone" from
the dropdown, again enter your Pi's IP address
and the same port that you entered in the app
on your phone. If you are in the field, your pi will
likely be in "hotspot" mode. In this configuration
connect your phone to the hotspot via WiFi. Then
use the IP address of 10.10.10.10 both in this script
and in the app on your phone.

BLUETOOTH GPS:
Bluetooth GPS is considered beta as I don't have a 
bluetooth GPS unit to test with. This assumes that 
the GPS unit is attach to an rfcomm port. You will 
need to know the rfcomm port number to use this feature. 
This script will not help you connect the GPS to the Pi
via bluetooth. If you own a Bluetooth GPS and find that
this section will not work for you, please file an
issue ticket at github.
https://github.com/km4ack/pi-scripts/issues

Serial GPS:
You will need to know the serial port number to 
which the GPS is attached. After choosing serial
GPS as your GPS type, enter the serial number
that the GPS is attached to.

CHANGELOG:
To see the changelog for this script run:
gpsupdate change
from the command line.
EOF

INTRO=$(yad --width=650 --height=400 --text-align=center --center --title="GPS Update Tool" \
--image $LOGO --window-icon=$LOGO --image-on-top --separator="|" --item-separator="|" \
--text="<b>GPS Update v$VERSION by KM4ACK</b>" \
--text-info</run/user/$UID/gpsintro.txt \
--button="Exit":0 > /dev/null 2>&1 \
--button="Continue":1)
BUT=$?
if [ $BUT = 252 ] || [ $BUT = 0 ]; then
    rm /run/user/$UID/gpsintro.txt
    exit
fi
rm /run/user/$UID/gpsintro.txt
}

#####################################
#	Display Changelog
#####################################
CHANGELOG(){
clear;echo;echo
cat <<EOF>/run/user/$UID/changelog.txt
Version 6 18OCT2022
    	add sudo password to support x86
Version 5 29OCT2021
	add defaults for phone GPS
Version 4 06SEPT0221
	add gpsd restart to main screen
Version 3 11FEB2021
	add bluetooth GPS support 
	add cell phone GPS support
	add changelog function
	add additional user instructions
	change sed command when modding gpsd file
	move USBGPS to funtion
	move help file to function
	add help option to main script
	move main menu to function
	bump version number
Version 2 06FEB2021 
	add serial GPS support
	bump version number
Verions 1 11JAN2021
	script created to help swap between multiple GPS devices

EOF

INTRO=$(yad --width=650 --height=350 --text-align=center --center --title="GPS Update Tool by KM4ACK - Changelog"  --show-uri \
--image $LOGO --window-icon=$LOGO --image-on-top --separator="|" --item-separator="|" \
--text-info</run/user/$UID/changelog.txt \
--button="Exit":2 > /dev/null 2>&1)
BUT=$?
if [ $BUT = 252 ] || [ $BUT = 2 ]; then
    rm /run/user/$UID/changelog.txt
    exit
fi
rm /run/user/$UID/changelog.txt
exit
}

if [ $1 = 'change' ]>/dev/null 2>&1; then
    CHANGELOG
fi

#Verify gpsd is installed
if ! hash gpsd 2>/dev/null; then
    yad --center --height="300" --width="400" --form --separator="|" --item-separator="|" --title="GPS" \
    --image $LOGO --window-icon=$LOGO --image-on-top \
    --text="\r\r\r<b><big>GPS software not installed.\rPlease install and try again.</big></b>" \
    --button="Exit":1
fi

#####################################
#	Phone GPS Function
#####################################

PHONEGPS(){
IP=*
PORT=11123
PHONEPORT=$(yad --form --width=420 --text-align=center --center --title="GPS Update Tool" \
--image $LOGO --window-icon=$LOGO --image-on-top --separator="|" --item-separator="|" \
--text="<b>version $VERSION</b>" \
--text="\rEnter IP addr and port number for GPS\rSee help file for more information" \
--field="IP Addr" "$IP" \
--field="Port Number" "$PORT" \
--button="Continue":2 \
--button="Exit":1)
BUT=$?

MYIP=$(echo $PHONEPORT | awk -F "|" '{print $1}')
MYPORT=$(echo $PHONEPORT | awk -F "|" '{print $2}')
	if [ $BUT = 252 ] || [ $BUT = 1 ]; then
	    exit
	fi

##############################################################
#This section mods the gpsd file and restart the gpsd service#
##############################################################
cp /etc/default/gpsd /run/user/$UID

sed -i "s|DEVICES=.*|DEVICES=\"udp://$MYIP:$MYPORT\"|" /run/user/$UID/gpsd

echo $PASS | sudo -S cp /run/user/$UID/gpsd /etc/default/

echo $PASS | sudo -S systemctl restart gpsd

yad --center --height="300" --width="300" --form --separator="|" --item-separator="|" --title="GPS" \
--image $LOGO --window-icon=$LOGO --image-on-top \
--text="\r\r\r\r\r<b><big>GPS had been updated</big></b>" \
--button="Exit":1
exit
}

#####################################
#	serial GPS Function
#####################################

#For those that use a serial GPS hat like https://www.adafruit.com/product/2324

SERIALGPS(){
SERIALPORT=$(yad --form --width=420 --text-align=center --center --title="GPS Update Tool" \
--image $LOGO --window-icon=$LOGO --image-on-top --separator="|" --item-separator="|" \
--text="<b>version $VERSION</b>" \
--text="\rEnter serial port number for GPS" \
--field="Serial Port Number" \
--button="Continue":2 \
--button="Exit":1)
BUT=$?
MYPORT=$(echo $SERIALPORT | awk -F "|" '{print $1}')
	if [ $BUT = 252 ] || [ $BUT = 1 ]; then
	    exit
	fi
##############################################################
#This section mods the gpsd file and restart the gpsd service#
##############################################################
cp /etc/default/gpsd /run/user/$UID

sed -i "s|DEVICES=.*|DEVICES=\"/dev/serial$MYPORT\"|" /run/user/$UID/gpsd

echo $PASS | sudo -S cp /run/user/$UID/gpsd /etc/default/

echo $PASS | sudo -S systemctl restart gpsd

yad --center --height="300" --width="300" --form --separator="|" --item-separator="|" --title="GPS" \
--image $LOGO --window-icon=$LOGO --image-on-top \
--text="\r\r\r\r\r<b><big>GPS had been updated</big></b>" \
--button="Exit":1
exit
}

#####################################
#	bluetooth GPS Function
#####################################

#Section used by hams that use a serial GPS hat like https://www.adafruit.com/product/2324

BLUEGPS(){
BLUEPORT=$(yad --form --width=420 --text-align=center --center --title="GPS Update Tool" \
--image $LOGO --window-icon=$LOGO --image-on-top --separator="|" --item-separator="|" \
--text="<b>version $VERSION</b>" \
--text="\rEnter rfcomm port number for GPS" \
--field="Rfcomm Port Number" \
--button="Continue":2 \
--button="Exit":1)
BUT=$?
MYPORT=$(echo $BLUEPORT | awk -F "|" '{print $1}')
	if [ $BUT = 252 ] || [ $BUT = 1 ]; then
	    exit
	fi

##############################################################
#This section mods the gpsd file and restart the gpsd service#
##############################################################
cp /etc/default/gpsd /run/user/$UID

sed -i "s|DEVICES=.*|DEVICES=\"/dev/rfcomm$MYPORT\"|" /run/user/$UID/gpsd

echo $PASS | sudo -S cp /run/user/$UID/gpsd /etc/default/

echo $PASS | sudo -S systemctl restart gpsd

yad --center --height="300" --width="300" --form --separator="|" --item-separator="|" --title="GPS" \
--image $LOGO --window-icon=$LOGO --image-on-top \
--text="\r\r\r\r\r<b><big>GPS had been updated</big></b>" \
--button="Exit":1
exit
}

#####################################
#	USB GPS Function
#####################################
USBGPS(){
#######################################################
#This section allows the user to identify the GPS unit#
#######################################################

yad --center --height="200" --width="200" --form --separator="|" --item-separator="|" --title="GPS" \
--image $LOGO --window-icon=$LOGO --image-on-top \
--text="\r\r\r<b><big>Connect your GPS to the pi</big></b>" \
--button="Exit":1 \
--button="Continue":2

BUT=$?
if [ $BUT = 1 ] || [ $BUT = 252 ]; then
    exit
fi

USB=$(ls /dev/serial/by-id)
USB=$(echo $USB | sed "s/\s/|/g")

GPS=$(yad --center --height="200" --width="300" --form --separator="|" --item-separator="|" --title="GPS" \
--image $LOGO --window-icon=$LOGO --image-on-top \
--text="<b>Choose Your GPS</b>" \
--field="GPS":CB "$USB")
BUT=$?
if [ $BUT = 252 ] || [ $BUT = 1 ]; then
    exit
fi

GPS=$(echo $GPS | awk -F "|" '{print $1}')

##############################################################
#This section mods the gpsd file and restart the gpsd service#
##############################################################
cp /etc/default/gpsd /run/user/$UID

sed -i "s|DEVICES=.*|DEVICES=\"/dev/serial/by-id/$GPS\"|" /run/user/$UID/gpsd

echo $PASS | sudo -S cp /run/user/$UID/gpsd /etc/default/

echo $PASS | sudo -S systemctl restart gpsd

yad --center --height="300" --width="300" --form --separator="|" --item-separator="|" --title="GPS" \
--image $LOGO --window-icon=$LOGO --image-on-top \
--text="\r\r\r\r\r<b><big>GPS had been updated</big></b>" \
--button="Exit":1
}

MAIN(){
#######################################################
#    Choose GPS Type :: Serial,USB,Bluetooth,Phone    #
#######################################################
GPSTYPE=$(yad --form --width=420 --text-align=center --center --title="GPS Update Tool" \
--image $LOGO --window-icon=$LOGO --image-on-top --separator="|" --item-separator="|" \
--text="GPS Update Tool <b>v$VERSION</b> by KM4ACK" \
--field="Choose GPS Type or Help":CB "Help|USB|Serial|Bluetooth|Phone" \
--button="Restart GPSD":3 \
--button="Continue":2 \
--button="Exit":1)
BUT=$?
if [ $BUT = 1 ] || [ $BUT = 252 ]; then
    exit
fi
if [ $BUT = 3 ]; then
    echo "restarting gpsd service"
    echo $PASS | sudo -S systemctl restart gpsd
    yad --center --height="300" --width="300" --form --separator="|" --item-separator="|" --title="GPS" \
    --image $LOGO --window-icon=$LOGO --image-on-top \
    --text="\r\r\r\r\r<b><big>gpsd service restarted</big></b>" \
    --button="Ok":1
    MAIN
fi
MYGPS=$(echo $GPSTYPE | awk -F "|" '{print $1}')
if [ $MYGPS = 'Serial' ]; then
    SERIALGPS
elif [ $MYGPS = 'Bluetooth' ]; then
    BLUEGPS
elif [ $MYGPS = 'Phone' ]; then
    PHONEGPS
elif [ $MYGPS = 'USB' ]; then
    USBGPS
elif [ $MYGPS = 'Help' ]; then
    HELP
    MAIN
fi
}
MAIN