#!/bin/sh

# Purpose {{{
## Try to centralize all game's save in order to :
##	easily backup all save
##	easily restore it
##	be able to access it from anywhere
##	… all you can do with a Nextcloud (share, versionning,…)
##
## 1. Move save directories of a list of known games from Steam's
## userdata to a remote directory (Nextcloud, remote mount,…).
## Then create a symlink in userdata directory to the remote game
## directory.
##
## 2. If a directory doesn't exist, check if a remote one is
## available and symlink it.
##
## 3. List directories without symlinks.
##
## KISS : Only manage save directories from Steam userdata. For other
## paths ($XDG_DATA_HOME,…) check other scripts.
# }}}

# Vars {{{
debug=0

## Steam {{{
steam_id="112595584"
steam_userdata=".steam/steam/userdata/${steam_id}"
steam_compatdata=".steam/steam/steamapps/compatdata"

## List of Steam saves in userdata to backup {{{
### 760 − Steam Screenshots − https://steamdb.info/app/760/
### 35700 − Trine Enchanted Edition − https://pcgamingwiki.com/wiki/Trine_Enchanted_Edition
### 35720 − Trine 2 Complete Story − https://pcgamingwiki.com/wiki/Trine_2
### 55230 − Saints Row: The Third − https://pcgamingwiki.com/wiki/Saints_Row:_The_Third
### 204360 − Castle Crashers − https://pcgamingwiki.com/wiki/Castle_Crashers
### 206420 − Saints Row IV − https://pcgamingwiki.com/wiki/Saints_Row_IV
### 218820 − Mercenary Kings − https://pcgamingwiki.com/wiki/Mercenary_Kings
### 247080 − Crypt of the Necrodancer − https://pcgamingwiki.com/wiki/Crypt_of_the_Necrodancer
### 255870 − PixelJunk Shooter − https://pcgamingwiki.com/wiki/PixelJunk_Shooter
### 312530 − Duck Game − https://pcgamingwiki.com/wiki/Duck_Game
### 359840 − Shift Happens − https://pcgamingwiki.com/wiki/Shift_Happens
steam_userdata_games="760 35700 35720 55230 204360 206420 218820 247080 255870 312530 359840"
## }}}
## Pattern of Steam saves in compatdata to backup {{{
### Compatdata is the directory for games using Steam play so it's too big to
### be moved to a remote storage.
### Add the game id and the directory|file name to backup separated by a slash
### eg. GAME_ID/savedata.xml
### 213670 − South Park: The Stick of Truth − https://pcgamingwiki.com/wiki/South_Park:_The_Stick_of_Truth
### 312610 − Metal Slug X − https://pcgamingwiki.com/wiki/Metal_Slug_X
### 359840 − Shift Happens − https://pcgamingwiki.com/wiki/Shift_Happens
### 480490 − Prey (2017) − https://pcgamingwiki.com/wiki/Prey_(2017)
### 686200 − Door Kickers: Action Squad − https://pcgamingwiki.com/wiki/Door_Kickers:_Action_Squad
steam_compatdata_games_pattern="686200/userdata.bin 312610/UserDefault.xml"
# }}}
## List of Steam saves in steamapps to backup {{{
### 274190 − Broforce − https://pcgamingwiki.com/wiki/Broforce
# }}}
## Ids without backups in userdata {{{
### 7 − Unknown
### 620 − Portal 2 − https://pcgamingwiki.com/wiki/Portal_2
### 49520 − Borderlands 2 − https://pcgamingwiki.com/wiki/Borderlands_2
### 219150 − Hotline Miami − https://pcgamingwiki.com/wiki/Hotline_Miami
### 241100 − Steam Controller Configs − https://steamdb.info/app/241100/
### 242680 − Nuclear Throne − https://pcgamingwiki.com/wiki/Nuclear_Throne
### 251470 − TowerFall Ascension − https://pcgamingwiki.com/wiki/TowerFall_Ascension
### 255870 − PixelJunk Shooter − https://pcgamingwiki.com/wiki/PixelJunk_Shooter
### 268990 − The Dishwasher: Vampire Smile − https://pcgamingwiki.com/wiki/The_Dishwasher:_Vampire_Smile
### 295790 − Never Alone − https://pcgamingwiki.com/wiki/Never_Alone
### 416600 − Full Metal Furies − https://pcgamingwiki.com/wiki/Full_Metal_Furies
### 474210 − Butcher − https://pcgamingwiki.com/wiki/Butcher
### 697660 − Jump Gunners − https://pcgamingwiki.com/wiki/Jump_Gunners
### 728880 − Overcooked! 2 − https://pcgamingwiki.com/wiki/Overcooked!_2
ignore_pattern_steam_id="(7|620|49520|55230|213670|219150|241100|242680|251470|255870|268990|274190|295790|416600|474210|480490|686200|697660|728880|config|ugc|ugcmsgcache|\.)$"
## }}}
## }}}

remote_dir="${HOME}/Nextcloud/games/linux.sgl.script"

local_unmanaged_games_list="/tmp/unmanaged_games_list"
# }}}

# Functions {{{
# Move one Steam save game dir {{{
move_steam_game_dir() {
	_game_id="${1}"
	_steam_dir="${2}"
	_local_game_path="${HOME}/${_steam_dir}/${_game_id}"
	_remote_game_path="${remote_dir}/${_steam_dir}/${_game_id}"

	## If a remote directory doesn't already exists for this game
	if [ ! -d "${_remote_game_path}" ]; then
		### Ensure to create tree directories on remote storage
		mkdir -p -- "$(dirname "${_remote_game_path}")"
		### Move data to remote storage
		mv -- "${_local_game_path}" "${_remote_game_path}"
		[ "${debug}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : Move Steam game − The data of ${_game_id} − ${_local_game_path} moved to remote storage."
		### Then ask to create a symbolic link to local storage
		symlink_steam_game_dir "${_game_id}" "${_steam_dir}"
	else
		printf '\e[1;35m%-6s\e[m\n' "Move Steam game − ${_game_id} already have data on remote storage : ${_remote_game_path}. Abort to avoid to override data."
		exit 5
	fi
}
# }}}
# Symlink one Steam save game dir from remote to local {{{
symlink_steam_game_dir() {
	_game_id="${1}"
	_steam_dir="${2}"
	_local_game_path="${HOME}/${_steam_dir}/${_game_id}"
	_remote_game_path="${remote_dir}/${_steam_dir}/${_game_id}"

	if [ -d "${_remote_game_path}" ]; then
		ln -s -- "${_remote_game_path}" "${_local_game_path}"
		[ "${debug}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : Symlink Steam game — Symlink remote data of ${_game_id} to local storage."
	else
		[ "${debug}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : Symlink Steam game — ${_game_id} doesn't have remote data."
	fi
}
# }}}

# }}}

# Tests {{{

## Ensure remote dir exist {{{
if [ ! -d "${remote_dir}" ]; then
	printf '\e[1;35m%-6s\e[m\n' "The directory for save game doesn't exists : ${remote_dir}"
	exit 1
fi
## }}}
## Ensure Steam directories exist {{{
for steam_dir in "${steam_userdata}" "${steam_compatdata}"; do
	local_steam_path="${HOME}/${steam_dir}"
	if [ ! -d "${local_steam_path}" ]; then
		printf '\e[1;35m%-6s\e[m\n' "The Steam directory − ${steam_dir} for your ID (${steam_id}) doesn't exists yet… Should it must be create (for restoration,…) [Y/n] ?"
		read -r create_local_steam_userdata
		if [ "${create_local_steam_userdata}" = "" ] || [ "${create_local_steam_userdata}" = "Y" ] || [ "${create_local_steam_userdata}" = "y" ]; then
			mkdir -p -- "${local_steam_path}"
		else
			printf '\e[1;35m%-6s\e[m\n' "Steam directory (${steam_dir}) doesn't exists, abort script."
			exit 2
		fi
	fi
done
## }}}

# }}}

# Manage Steam userdata save game {{{
for game_id in ${steam_userdata_games}; do
	local_game_path="${HOME}/${steam_userdata}/${game_id}"
	local_game_path_type="$(file ${local_game_path} | cut -d' ' -f2)"

	case ${local_game_path_type} in
		## Data is already a symlink
		"symbolic")
			[ "${debug}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : Steam for loop — The data of ${game_id} are already symlinked to .... Skip."
			;;
		## Data is still a directory
		"directory")
			move_steam_game_dir "${game_id}" "${steam_userdata}"
			;;
		## Data doesn't exist
		"cannot")
			[ "${debug}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : Steam for loop — The data of ${game_id} − ${local_game_path} doesn't exist. Skip."
			symlink_steam_game_dir "${game_id}" "${steam_userdata}"
			;;
		## Data can't be managed
		*)
			printf '\e[1;35m%-6s\e[m\n' "Data of ${game_id} (userdata) − ${local_game_path} are not managed. Type: ${local_game_path_type}. Abort"
			exit 3
			;;
	esac

done
# }}}
# Manage Steam compadata save game {{{
for game_pattern in ${steam_compatdata_games_pattern}; do
	## Separate the game_id and the directory|file to backup|symlink
	game_id="$(echo ${game_pattern} | cut -d"/" -f1)"
	save_pattern="$(echo ${game_pattern} | cut -d"/" -f2)"

	### Follow symbolic links but avoid links to dosdevices and keep only one result
	temp_local_save_path="$(find -L "${HOME}/${steam_compatdata}/${game_id}" -ipath "*dosdevices*" -prune -o -iname "${save_pattern}" | grep -v "dosdevices" | head -n 1)"
	local_save_path="$(dirname "${temp_local_save_path}")"
	local_save_path_type="$(ls -ld "${local_save_path}" | sed 's/\(^.\).*/\1/')"
	## Path independent from local or remote base directory
	steam_dir="$(printf "%s" "${local_save_path}" | sed -e "s;${HOME}/;;")"

	## Print vars {{{
	#if [ "${debug}" -eq "0" ]; then
		#printf '\e[1;35m%-6s\e[m\n' "DEBUG : game ID : ${game_id}"
		#printf '\e[1;35m%-6s\e[m\n' "DEBUG : save pattern : ${save_pattern}"
		#printf '\e[1;35m%-6s\e[m\n' "DEBUG : temp local save path : ${temp_local_save_path}"
		#printf '\e[1;35m%-6s\e[m\n' "DEBUG : local save path : ${local_save_path}"
		#printf '\e[1;35m%-6s\e[m\n' "DEBUG : local save type : ${local_save_path_type}"
		#printf '\e[1;35m%-6s\e[m\n' "DEBUG : steam dir : ${steam_dir}"
	#fi
	## }}}

	case ${local_save_path_type} in
		## Data is already a symlink
		"symbolic"|"symboliclink"|"l")
			[ "${debug}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : Steam compatdata for loop — The data of ${game_id} are already symlinked to .... Skip."
			;;
		## Data is still a directory, try to move it
		"directory"|"d")
			move_steam_game_dir "$(basename "${steam_dir}")" "$(dirname "${steam_dir}")"
			;;
		## Data doesn't exist
		"cannot")
			[ "${debug}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : Steam compatdata for loop — The data of ${game_id} − ${local_save_path} doesn't exist. Skip."
			### TODO : Try to symlink
			;;
		## Data can't be managed
		*)
			printf '\e[1;35m%-6s\e[m\n' "Data of ${game_id} (compatdata) − ${local_save_path} are not managed. Type: ${local_save_path_type}. Abort."
			exit 3
			;;
	esac

done
# }}}
# List userdata unmanage game id {{{
cd -- "${HOME}/${steam_userdata}" || exit 1
rm -f -- "${local_unmanaged_games_list}"
find . -maxdepth 1 -type d | grep -vE "${ignore_pattern_steam_id}" > "${local_unmanaged_games_list}"
if [ -s "${local_unmanaged_games_list}" ]; then
	printf '\e[1;35m%-6s\e[m\n' "List of unmanaged directories :"
	cat "${local_unmanaged_games_list}"
fi
rm -f -- "${local_unmanaged_games_list}"
cd -- - > /dev/null || exit 1
# }}}

exit 0