#!/bin/bash

source $HOME/.whitelist-config > /dev/null 2>&1

MYEMAIL=test@winlink.org

SUBJECT=WHITELIST
TO=system@winlink.org
WHITEFILE=$HOME/.whitelist.txt
TEMP=/run/user/$UID/whitelist
LOGFILE=$HOME/Documents/mylog.txt

touch $WHITEFILE


#Check to see if we have a whitelist
MYLIST=$(cat $WHITEFILE)
clear;echo;echo
if [ -z "$MYLIST" ] && [ -z $1 ]; then
echo "Please setup a whitelist. To get started run"
echo "auto-whitelist setup"
exit
fi

#verify we have a callsign to work with
if [ -z $CALLSIGN ]; then
clear;echo;echo
echo "Call sign not set";echo
read -p "What is your call sign? " CALL
CALL=${CALL^^}
echo "CALLSIGN=$CALL" > $HOME/.whitelist-config
CALLSIGN=$CALL
fi


######################################
#	WHITELIST SETUP
######################################

if [ "$1" = 'setup' ]; then
EDITFILE(){
#check to see if crontab entry exist
WHITECRON=$(crontab -l | grep whitelist)
	if [ -z "$WHITECRON" ]; then
	clear;echo;echo
	echo "Cronjob not set. It needs to be set"
	echo "to update the whitelist automatically";echo
	read -p "Would you like to set it now? y/n " ANS
		if [ $ANS = Y ] || [ $ANS = y ]; then
		crontab -l > /run/user/$UID/crontemp
		echo "30 09 01 Jan,Apr,Jul,Oct * /home/pi/bin/auto-whitelist" >> /run/user/$UID/crontemp
		crontab /run/user/$UID/crontemp
		echo "Cronjob set to run every 3 months"
		sleep 2
		fi
	fi	

#check to see if whitelist exist already
	if [ -f $WHITEFILE ]; then
	clear;echo;echo
	echo "==============================="
	echo "  $CALLSIGN whitelist includes"
	echo "==============================="
	cat $WHITEFILE
	else
	clear;echo;echo
	echo "No whitelist file found"
	fi

#menu to mod whitelist
	echo; echo "(A)dd to list | (R)emove from list"
	read -p "(D)elete list | E(x)it " ANS
	if [ $ANS != D ] && [ $ANS != d ] && [ $ANS != X ] && [ $ANS != x ] && \
	[ $ANS != a ] && [ $ANS != A ] && [ $ANS != r ] && [ $ANS != R ]; then
	echo "INVALID CHOICE"
	sleep 2
	EDITFILE	
	elif [ $ANS = D ] || [ $ANS = d ]; then
	rm $WHITEFILE $HOME/.whitelist-config
	clear;echo;echo	
	echo "Whitelist file deleted"
	echo "Please restart auto-whitelist"
	exit
	elif [ $ANS = X ] || [ $ANS = x ]; then
	echo;echo "Would you like to manually"
	read -p "update your whitelist now? y/n " ANS
		if [ $ANS = Y ] || [ $ANS = y ];then
		echo;echo "Sending whitelist update to Winlink system"
		sleep 1
		else
		exit
		fi
	elif [ $ANS = A ] || [ $ANS = a ]; then
	read -p "What would you like to add? " ADD
	echo $ADD >> $WHITEFILE
	echo "$ADD was added"
	sleep 2
	EDITFILE
	elif [ $ANS = R ] || [ $ANS = r ]; then
	read -p "Which entry would you like to remove? " REMV
	sed -i "s/$REMV//" $WHITEFILE
	sed -i '/^$/d' $WHITEFILE
	echo "$REMV was removed"
	sleep 1
	EDITFILE
	fi
}
EDITFILE
fi

######################################
#	MAIN SCRIPT
######################################

#COMPOSE EMAIL Function
COMPOSE () {

#Count body characters
BODYCOUNT=${#BODY}
NEWCOUNT=$(expr $BODYCOUNT + 1)

#set date
TODAY=$(date '+%Y/%m/%d %H:%M')
TODAY1=$(date)

#generate 12 random number
NEW_UUID=$(cat /dev/urandom | tr -dc 'A-Z0-9' | fold -w 12 | head -n 1)

#add .b2f to end of random number for new file name
NEW_FILE=$HOME/.wl2k/mailbox/$CALLSIGN/out/$NEW_UUID".b2f"

#create new file
touch $NEW_FILE

#add file contents
echo "Mid: "$NEW_UUID >> $NEW_FILE
echo "Body: "$NEWCOUNT >> $NEW_FILE
echo "Content-Transfer-Encoding: 8bit" >> $NEW_FILE
echo "Content-Type: text/plain; charset=ISO-8859-1" >> $NEW_FILE
echo "Date: "$TODAY >> $NEW_FILE
echo "From: "$CALLSIGN >> $NEW_FILE
echo "Mbo: "$CALLSIGN >> $NEW_FILE
echo "Subject: "$SUBJECT >> $NEW_FILE
echo "To: "$TO >> $NEW_FILE
echo "Type: Private" >> $NEW_FILE
echo "" >> $NEW_FILE
echo $BODY >> $NEW_FILE
rm $TEMP > /dev/null 2>&1
}

touch $TEMP

while read LINE
	do 
	LINE="Accept: $LINE"	
	BODY=$LINE
	COMPOSE
done < $WHITEFILE

TO=$MYEMAIL
SUBJECT="Whitelist updated"
BODY="The winlink whitelist has been update by your raspberry pi"
COMPOSE

pat connect telnet

SUC=$(echo $?)
if [ $SUC = 0 ]; then
echo "$TODAY1 Winlink Whitelist updated" >> $LOGFILE
elif [ $SUC = 1 ]; then
echo "$TODAY1 Winlink Whitelist update FAILED!" >> $LOGFILE
fi