#!/bin/bash

# Copyright 2025 by Alexei Bezborodov <AlexeiBv+linux_script@narod.ru> 
# License: Public domain: http://unlicense.org/ 
# Общественное достояние 

[ "${alias_dir}" = "" ] && alias_dir=$(pwd)
source "${alias_dir}/common"

backup_restore()
{
    in_file=$1
    in_dir=$1
    [ "$in_file" = '' || "$in_dir" = '' ] && printf "Укажите файл для распаковки и директурию, куда распаковывать, например 'backup_restore backup.tgz /home'\n" && return
    printf "Произойдёт распаковка файла '$in_file' в папку '$in_dir'\n"
    ask_continue && return
    sudo tar xvpzf "$in_file" -C "$in_dir"
}
mkalias_with_prefix 'backup_restore'

backup_delete_old_files_by_regex()
{
    backup_dir=$1
    file_regex=$2
    file_max_count=$3
    filter=$4

    file_max_count=$((file_max_count+1)) # tail не так работает
    find "${backup_dir}" -regextype posix-extended -regex ".*${file_regex}" | grep -Ev "${filter}" | sort -r | tail -n +${file_max_count} | xargs -d '\n' rm -f
}
mkalias_with_prefix 'backup_delete_old_files_by_regex'

# | grep -Ev "01d"
#    cur_date=$(date +%Yy_%mm_%dd)
# '.*([^1])-zakonvremeni_backup.tar'
# '.*1-zakonvremeni_backup.tar'

backup_delete_old_files_by_date()
{
    backup_dir=$1
    file_name_template=$2
    [[ "$backup_dir" == '' || "$file_name_template" == '' ]] && printf "Укажите имя папки и шаблон имени, например 'delete_old_backup_files_by_date backup/ host_name_@DATE.zip 3 4 5'. '@DATE' - означает дату в формате 'date +%%Yy_%%mm_%%dd', 3 - максимальное количество файлов сохраняемых ежедневно, 4 - ежемесячно, 5 - ежегодно\n" && return
    file_max_count_every_day=$3
    file_max_count_every_month=$4
    file_max_count_every_year=$5
    by_week=$6

    [[ "$file_max_count_every_day" == '' ]] && file_max_count_every_day=2
    [[ "$file_max_count_every_month" == '' ]] && file_max_count_every_month=2
    [[ "$file_max_count_every_year" == '' ]] && file_max_count_every_year=2

    if [[ "$by_week" == "" ]]; then
        backup_delete_old_files_by_regex "${backup_dir}" "${file_name_template//'@DATE'/'.*'}" "${file_max_count_every_day}" 'm_01d|y_03m_01d'
        backup_delete_old_files_by_regex "${backup_dir}" "${file_name_template//'@DATE'/'.*m_01d.*'}" "${file_max_count_every_month}" 'y_03m_01d'
        backup_delete_old_files_by_regex "${backup_dir}" "${file_name_template//'@DATE'/'.*y_03m_01d.*'}" "${file_max_count_every_year}" '________NOTHONG___________'
    else
        backup_delete_old_files_by_regex "${backup_dir}" "${file_name_template//'@DATE'/'.*'}" "${file_max_count_every_day}" '1v-|11v-'
        backup_delete_old_files_by_regex "${backup_dir}" "${file_name_template//'@DATE'/'.*1v.*'}" "${file_max_count_every_month}" '11v-'
        backup_delete_old_files_by_regex "${backup_dir}" "${file_name_template//'@DATE'/'.*11v-.*'}" "${file_max_count_every_year}" '________NOTHONG___________'
    fi

    # test
    # for (( y = 2001; y < 2010; y++ )) do for (( m = 1; m < 10; m++ )) do for (( d = 1; d < 10; d++ )) do touch "backup_${y}y_0${m}m_0${d}d.zip"; backup_delete_old_files_by_date ./ "backup_@DATE\.zip" 2 2 2; sleep 0.15; done; done; done;
    # for (( y = 2001; y < 2010; y++ )) do for (( v = 10; v < 51; v++ )) do touch "backup_${y}y_01m_01d-${v}v-10H.zip"; backup_delete_old_files_by_date ./ "backup_@DATE\.zip" 2 2 2 week; sleep 0.15; done; done;
}
mkalias_with_prefix 'backup_delete_old_files_by_date'

backup_date_week()
{
    echo "$(date +%Vv)"
}
mkalias_with_prefix 'backup_date_week'

backup_date_year()
{
    echo "$(date +%Yy)"
}
mkalias_with_prefix 'backup_date_year'

backup_date_day()
{
    week=$(backup_date_week)
    year=$(backup_date_year)
    echo "${year}_$(date +%mm_%dd)-${week}"
}
mkalias_with_prefix 'backup_date_day'

backup_date()
{
    day=$(backup_date_day)
    echo "${day}-$(date +%Hh_%Mm_%Ss)"
}
mkalias_with_prefix 'backup_date'

exclude_mozilla='
--exclude=.mozilla/firefox/*/Cache 
--exclude=.mozilla/firefox/*/storage/*/https* 
--exclude=.mozilla/firefox/*/storage/*/http* 
--exclude=.mozilla/firefox/*/storage/*/file*
'

backup_firefox()
{
    eval $(mkvar 'backup_dir|$1||Укажите папку для бекапа')
    eval $(mkvar 'user|$2|$(whoami)')
    eval $(mkvar 'file_add_name|$4|mozilla_backup')
    eval $(mkvar 'file|$3|${backup_dir}/$(hostname)_${user}_${file_add_name}_$(backup_date).tgz')
    #ask_continue && return

    echo "$(backup_date): Делаем бэкап /.mozilla в файл '${file}'"

    tar cvpzf "${file}" \
        ${exclude_mozilla//'\n'/' '} \
        /home/${user}/.mozilla

    echo "${file}"
}
mkalias_with_prefix 'backup_firefox'

exclude_home='
--exclude=*/Загрузки/* \
--exclude=*/Backup/* \
--exclude=*/Музыка/* \
--exclude=MyProgs \
--exclude=media \
--exclude=private \
--exclude=.thumbnails \
--exclude=*/.cache/* \
--exclude=/.config/chromium/*/CacheStorage \
--exclude=*/.config/skypeforlinux/Cache \
--exclude=.local \
--exclude=.var/app/app.organicmaps.desktop/data \
--exclude=.steam \
--exclude=.smartgit/updates \
--exclude=.wine*/*/windows/ \
--exclude=.googleearth \
--exclude=*/.Genymobile \
--exclude=go/pkg \
--exclude=.apt \
--exclude=.npm \
--exclude=.gradle \
--exclude=Android \
--exclude=build/intermediates \
--exclude=build/*.obj \
--exclude=chromium/*/WebStorage \
--exclude=.android \
--exclude=.VirtualBox/*.iso \
'

backup_home()
{
    eval $(mkvar 'backup_dir|$1||Укажите папку для бекапа')
    eval $(mkvar 'file_add_name|$3|home_backup')
    eval $(mkvar 'file|$2|${backup_dir}/$(hostname)_${file_add_name}_$(backup_date).tgz')
    #ask_continue && return

    echo "$(backup_date): Делаем бэкап /home в файл '${file}'"

    sudo tar cvpzf "${file}" \
        --exclude=/*${file_add_name}*.tgz \
        ${exclude_mozilla//'\n'/' '} \
        ${exclude_home//'\n'/' '} \
        /home
}
mkalias_with_prefix 'backup_home'

backup_etc()
{
    eval $(mkvar 'backup_dir|$1||Укажите папку для бекапа')
    eval $(mkvar 'file_add_name|$3|sys_etc_backup')
    eval $(mkvar 'file|$2|${backup_dir}/$(hostname)_${file_add_name}_$(backup_date).tgz')
    #ask_continue && return

    echo "$(backup_date): Делаем бэкап /etc в файл '${file}'"

    sudo tar cvpzf "${file}" \
        /etc 
}
mkalias_with_prefix 'backup_etc'

backup_sys()
{
    exclude_sys='
        --exclude=/proc \
        --exclude=/dev \
        --exclude=/lost+found \
        --exclude=/mnt \
        --exclude=/run/media \
        --exclude=/sys \
        --exclude=/home \
        --exclude=/media \
        --exclude=/var/log \
        --exclude=/var/cache \
        --exclude=/var/lib/flatpak \
        --exclude=/var/tmp \
        --exclude=/usr/share \
        --exclude=/tmp \
        --exclude=/opt \
    '
    eval $(mkvar 'backup_dir|$1||Укажите папку для бекапа')
    eval $(mkvar 'file_add_name|$3|sysbackup')
    eval $(mkvar 'file|$2|${backup_dir}/$(hostname)_${file_add_name}_$(backup_date).tgz')
    #ask_continue && return

    echo "$(backup_date): Делаем бэкап / в файл '${file}'"

    sudo tar cvpzf "${file}" \
        --exclude=/*${file_add_name}*.tgz \
        ${exclude_sys//'\n'/' '} \
        /
    echo "${file}"
}
mkalias_with_prefix 'backup_sys'

backup_firefox_and_del_old_files()
{
    backup_dir=$1
    [ "$backup_dir" = '' ] && backup_dir=$(pwd) && printf "Папка для бекапа '${backup_dir}'\n"
    eval $(mkvar 'user|$2|$(whoami)')
    #ask_continue && return

    backup_host_dir="${backup_dir}/$(hostname)"
    mkdir "${backup_host_dir}"
    backup_ff_dir="${backup_host_dir}/firefox_${user}"
    mkdir "${backup_ff_dir}"

    file_add_name="mozilla_backup"
    file_pref="${backup_ff_dir}/$(hostname)_${user}_${file_add_name}_"
    compgen -G "${file_pref}*$(backup_date_year)*$(backup_date_week)*" && printf "$(backup_date): На этой неделе уже делался бэкап\n" && return

    file="${file_pref}$(backup_date).tgz"

    backup_firefox "${backup_ff_dir}" "${user}" "${file}" "${file_add_name}"
    backup_delete_old_files_by_date "${backup_ff_dir}" "${file_add_name}_@DATE\.tgz" 3 2 2 week
}
mkalias_with_prefix 'backup_firefox_and_del_old_files'

backup_home_and_del_old_files()
{
    backup_dir=$1
    [ "$backup_dir" = '' ] && backup_dir=$(pwd) && printf "Папка для бекапа '${backup_dir}'\n"
    #ask_continue && return

    backup_host_dir="${backup_dir}/$(hostname)"
    mkdir "${backup_host_dir}"
    backup_home_dir="${backup_host_dir}/home"
    mkdir "${backup_home_dir}"

    file_add_name="home_backup"
    file_pref="${backup_home_dir}/$(hostname)_${file_add_name}_"
    compgen -G "${file_pref}*$(backup_date_year)*$(backup_date_week)*" && printf "$(backup_date): На этой неделе уже делался бэкап\n" && return

    file="${file_pref}$(backup_date).tgz"

    backup_home "${backup_home_dir}" "${file}" "${file_add_name}"
    backup_delete_old_files_by_date "${backup_home_dir}" "${file_add_name}_@DATE\.tgz" 2 1 1 week
}
mkalias_with_prefix 'backup_home_and_del_old_files'

backup_sys_and_del_old_files()
{
    backup_dir=$1
    [ "$backup_dir" = '' ] && backup_dir=$(pwd) && printf "Папка для бекапа '${backup_dir}'\n" 
    #ask_continue && return

    backup_host_dir="${backup_dir}/$(hostname)"
    mkdir "${backup_host_dir}"
    backup_sys_dir="${backup_host_dir}/sys"
    mkdir "${backup_sys_dir}"

    file_add_name="sys_etc_backup"
    file_pref="${backup_sys_dir}/$(hostname)_${file_add_name}_"
    compgen -G "${file_pref}$(backup_date_day)*" && printf "$(backup_date): Сегодня уже делался бэкап\n" && return

    file="${file_pref}$(backup_date).tgz"

    backup_etc "${backup_sys_dir}" "${file}" "${file_add_name}"
    backup_delete_old_files_by_date "${backup_sys_dir}" "${file_add_name}_@DATE\.tgz" 3 3 3
}
mkalias_with_prefix 'backup_sys_and_del_old_files'

backup_crontab_firefox()
{
    eval $(mkvar 'backup_dir|$1|$(pwd)')
    eval $(mkvar 'user|$2|$(whoami)')
    sudo_=""
    [[ "$user" != "$(whoami)" ]] && sudo_="sudo"
    cmd="1 * * * * bash -c 'source /home/$(whoami)/.bashrc && backup_firefox_and_del_old_files \"${backup_dir}\" $user >> /home/$(whoami)/Backup/backup_firefox.log'"
    echo "Будет установлена команда '${cmd}' с правами ${sudo_}"
    ask_continue && return
    crontab_add "${cmd}" ${sudo_}
}
mkalias_with_prefix 'backup_crontab_firefox'

backup_crontab_home()
{
    eval $(mkvar 'backup_dir|$1|$(pwd)')
    eval $(mkvar 'user|$2|$(whoami)')
    sudo_="sudo"
    cmd="1 * * * * bash -c 'source /home/${user}/.bashrc && backup_home_and_del_old_files \"${backup_dir}\" >> /home/${user}/Backup/backup_home.log'"
    echo "Будет установлена команда '${cmd}' с правами ${sudo_}"
    ask_continue && return
    crontab_add "${cmd}" ${sudo_}
}
mkalias_with_prefix 'backup_crontab_home'

backup_crontab_etc()
{
    eval $(mkvar 'backup_dir|$1|$(pwd)')
    eval $(mkvar 'user|$2|$(whoami)')
    sudo_="sudo"
    cmd="1 * * * * bash -c 'source /home/${user}/.bashrc && backup_sys_and_del_old_files \"${backup_dir}\" >> /home/${user}/Backup/backup_etc.log'"
    echo "Будет установлена команда '${cmd}' с правами ${sudo_}"
    ask_continue && return
    crontab_add "${cmd}" ${sudo_}
}
mkalias_with_prefix 'backup_crontab_etc'