#!/bin/sh
#
# This script makes local backups of tabs and passwords from Firefox, and then regularly copies them to a backup server
#
# firefox_decrypt.py is available from https://github.com/Unode/firefox_decrypt
#
# firefox_tabgroups_export.py is available from https://gist.github.com/ssokolow/35097553e5173935e597
# The version in this repo modifes the original to export only as text
#

epoch=$( date +%Y%m%d%H%M );
server=10.25.0.1
#server=treehouse.org.za
backups=~/Downloads/firefox

copy() {
    content=$1
    if [ -e ${content} ] && ping -qc1 ${server} >/dev/null; then 
        rsync -a --delete -e 'ssh -i ~/.ssh/id_rsa-firefox_pass' ${content} ${server}:remember/
        #scp -ri ~/.ssh/id_rsa-firefox_pass ${backups}/firefox_tabs.${epoch} ${server}:remember/tabs
    fi
}

if  [ -x ~/bin/firefox_tabgroups_export.py ]; then
    do_copy=0
    mkdir -p ${backups}/tabs
    mkdir -p ${backups}/tabs/sessionstore
    previous=$( ls ${backups}/tabs/firefox_tabs.* 2>/dev/null | tail -1 )
    ~/bin/firefox_tabgroups_export.py > ${backups}/tabs/firefox_tabs.${epoch}
    if [ -f "${previous}" ]; then
        if diff -q ${previous} ${backups}/tabs/firefox_tabs.${epoch} >/dev/null; then
            # No difference, remove this file
            if [ ${previous} != ${backups}/tabs/firefox_tabs.${epoch} ]; then
                rm ${backups}/tabs/firefox_tabs.${epoch}
            fi
        else
            do_copy=1
        fi
    else
        do_copy=1
    fi

    # Delete backups older than a year
    find ${backups}/tabs -ctime +365 -delete

    if [ ${do_copy} -gt 0 ]; then
        for session in ~/.mozilla/firefox/*/sessionstore*/*; do
            sessionfile=$( basename ${session} )
            cp ${session} ${backups}/tabs/sessionstore/${epoch}_${sessionfile}
        done
        copy ${backups}/tabs
    fi
fi

if [ -x ~/bin/firefox_decrypt.py ]; then
    do_copy=0
    mkdir -p ${backups}/passwords
    previous=$( ls ${backups}/passwords/firefox_passwords.* 2>/dev/null | tail -1 )
    echo '' | ~/bin/firefox_decrypt.py > ${backups}/passwords/firefox_passwords.${epoch} 2>/dev/null
    if [ -f "${previous}" ]; then
        if diff -q ${previous} ${backups}/passwords/firefox_passwords.${epoch} >/dev/null; then
            # No difference, remove this file
            if [ ${previous} != ${backups}/passwords/firefox_passwords.${epoch} ]; then
                rm ${backups}/passwords/firefox_passwords.${epoch}
            fi
        else
            do_copy=1
        fi
    else
        do_copy=1
    fi

    # Delete backups older than a day
    find ${backups}/passwords -ctime +1 -delete

    if [ ${do_copy} -gt 0 ]; then
        ln -srf ${backups}/passwords/firefox_passwords.${epoch} ${backups}/passwords/firefox_passwords
        copy ${backups}/passwords
    fi
fi