scripts/create_retroarch_thumbnails.sh

#!/bin/bash
function help_message() {
    echo "$USAGE"
    echo
    echo "Where [SYSTEMS] are:"
    for WORD in $SYSTEMS; do
        echo -e "\t$WORD"
    done
}

readonly USAGE="
USAGE:
$(basename "$0") [SYSTEM] [ROM_FOLDER] [THUMBNAILS_FOLDER]"

readonly SYSTEMS="arcade atari2600 atari7800 atarilynx coleco dreamcast fds gamegear gb gba gbc mastersystem megadrive msx n64 nds nes ngp ngpc pcengine psp psx saturn sega32x segacd sg-1000 snes virtualboy wonderswan wonderswancolor"

# check if there are all the parameters
if [ "$#" -ne 3 ]; then
    help_message
    exit 0
fi

# check if the system parameter is valid
if ! echo "$SYSTEMS" | grep -w "$1" >/dev/null; then
    printf "%s\n" "You must enter a valid system name."
    help_message
    exit 0
fi

if ! test -d "${ROM_FOLDER}"/"${SYSTEM}"; then
    echo "${ROM_FOLDER}"/"${SYSTEM}" does not exists
    exit 0
fi

#readonly SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
readonly SYSTEM="$1"
readonly ROM_FOLDER="$2"
readonly THUMBNAILS_FOLDER="$3"

case $SYSTEM in

3do)
    readonly PLAYLIST_NAME=""
    ;;
3ds)
    readonly PLAYLIST_NAME=""
    ;;
amiga)
    readonly PLAYLIST_NAME=""
    ;;
amstradcpc)
    readonly PLAYLIST_NAME=""
    ;;
apple2)
    readonly PLAYLIST_NAME=""
    ;;
arcade)
    readonly PLAYLIST_NAME="FBNeo - Arcade Games"
    ;;
arcadia)
    readonly PLAYLIST_NAME=""
    ;;
astrocde)
    readonly PLAYLIST_NAME=""
    ;;
atari800)
    readonly PLAYLIST_NAME=""
    ;;
atari2600)
    readonly PLAYLIST_NAME="Atari - 2600"
    ;;
atari5200)
    readonly PLAYLIST_NAME=""
    ;;
atari7800)
    readonly PLAYLIST_NAME="Atari - 7800"
    ;;
atarijaguar)
    readonly PLAYLIST_NAME=""
    ;;
atarilynx)
    readonly PLAYLIST_NAME="Atari - Lynx"
    ;;
atarist)
    readonly PLAYLIST_NAME=""
    ;;
c16)
    readonly PLAYLIST_NAME=""
    ;;
c64)
    readonly PLAYLIST_NAME=""
    ;;
c128)
    readonly PLAYLIST_NAME=""
    ;;
coco)
    readonly PLAYLIST_NAME=""
    ;;
coleco)
    readonly PLAYLIST_NAME="Coleco - ColecoVision"
    ;;
daphne)
    readonly PLAYLIST_NAME=""
    ;;
dragon32)
    readonly PLAYLIST_NAME=""
    ;;
dreamcast)
    readonly PLAYLIST_NAME=""
    ;;
fba)
    readonly PLAYLIST_NAME=""
    ;;
fds)
    readonly PLAYLIST_NAME=""
    ;;
gameandwatch)
    readonly PLAYLIST_NAME=""
    ;;
gamegear)
    readonly PLAYLIST_NAME="Sega - Game Gear"
    ;;
gb)
    readonly PLAYLIST_NAME="Nintendo - Game Boy"
    ;;
gba)
    readonly PLAYLIST_NAME="Nintendo - Game Boy Advance"
    ;;
gbc)
    readonly PLAYLIST_NAME="Nintendo - Game Boy Color"
    ;;
gc)
    readonly PLAYLIST_NAME=""
    ;;
genesis)
    readonly PLAYLIST_NAME=""
    ;;
intellivision)
    readonly PLAYLIST_NAME=""
    ;;
mame-advmame)
    readonly PLAYLIST_NAME=""
    ;;
mame-libretro)
    readonly PLAYLIST_NAME=""
    ;;
mame-mame4all)
    readonly PLAYLIST_NAME=""
    ;;
mastersystem)
    readonly PLAYLIST_NAME="Sega - Master System - Mark III"
    ;;
megacd)
    readonly PLAYLIST_NAME="Sega - Mega-CD - Sega CD"
    ;;
megadrive)
    readonly PLAYLIST_NAME="Sega - Mega Drive - Genesis"
    ;;
msx)
    readonly PLAYLIST_NAME="Microsoft - MSX"
    ;;
msx2)
    readonly PLAYLIST_NAME="Microsoft - MSX2"
    ;;
n64)
    readonly PLAYLIST_NAME=""
    ;;
nds)
    readonly PLAYLIST_NAME="Nintendo - Nintendo DS"
    ;;
neogeo)
    readonly PLAYLIST_NAME=""
    ;;
nes)
    readonly PLAYLIST_NAME="Nintendo - Nintendo Entertainment System"
    ;;
ngp)
    readonly PLAYLIST_NAME="SNK - Neo Geo Pocket"
    ;;
ngpc)
    readonly PLAYLIST_NAME="SNK - Neo Geo Pocket Color"
    ;;
oric)
    readonly PLAYLIST_NAME=""
    ;;
pc)
    readonly PLAYLIST_NAME=""
    ;;
pc88)
    readonly PLAYLIST_NAME=""
    ;;
pc98)
    readonly PLAYLIST_NAME=""
    ;;
pcfx)
    readonly PLAYLIST_NAME=""
    ;;
pcengine)
    readonly PLAYLIST_NAME="NEC - PC Engine - TurboGrafx 16"
    ;;
pcenginecd)
    readonly PLAYLIST_NAME="NEC - PC Engine CD"
    ;;
pokemini)
    readonly PLAYLIST_NAME=""
    ;;
ports)
    readonly PLAYLIST_NAME=""
    ;;
ps2)
    readonly PLAYLIST_NAME=""
    ;;
psp)
    readonly PLAYLIST_NAME=""
    ;;
psx)
    readonly PLAYLIST_NAME="Sony - PlayStation"
    ;;
saturn)
    readonly PLAYLIST_NAME=""
    ;;
scummvm)
    readonly PLAYLIST_NAME=""
    ;;
sega32x)
    readonly PLAYLIST_NAME=""
    ;;
segacd)
    readonly PLAYLIST_NAME="Sega - Mega-CD - Sega CD"
    ;;
sg-1000)
    readonly PLAYLIST_NAME="Sega - SG-1000"
    ;;
snes)
    readonly PLAYLIST_NAME="Nintendo - Super Nintendo Entertainment System"
    ;;
steam)
    readonly PLAYLIST_NAME=""
    ;;
ti99)
    readonly PLAYLIST_NAME=""
    ;;
trs-80)
    readonly PLAYLIST_NAME=""
    ;;
vectrex)
    readonly PLAYLIST_NAME=""
    ;;
vic20)
    readonly PLAYLIST_NAME=""
    ;;
videopac)
    readonly PLAYLIST_NAME=""
    ;;
virtualboy)
    readonly PLAYLIST_NAME=""
    ;;
wii)
    readonly PLAYLIST_NAME=""
    ;;
wonderswan)
    readonly PLAYLIST_NAME="Bandai - WonderSwan"
    ;;
wonderswancolor)
    readonly PLAYLIST_NAME="Bandai - WonderSwan Color"
    ;;
x68000)
    readonly PLAYLIST_NAME=""
    ;;
x1)
    readonly PLAYLIST_NAME=""
    ;;
zmachine)
    readonly PLAYLIST_NAME=""
    ;;
zx81)
    readonly PLAYLIST_NAME=""
    ;;
zxspectrum)
    readonly PLAYLIST_NAME=""
    ;;

esac

mkdir -p "${THUMBNAILS_FOLDER}"/"${PLAYLIST_NAME}"
mkdir -p "${THUMBNAILS_FOLDER}"/"${PLAYLIST_NAME}"/Named_Boxarts
mkdir -p "${THUMBNAILS_FOLDER}"/"${PLAYLIST_NAME}"/Named_Snaps
mkdir -p "${THUMBNAILS_FOLDER}"/"${PLAYLIST_NAME}"/Named_Titles

cp -v "${ROM_FOLDER}"/"${SYSTEM}"/media/covers/* "${THUMBNAILS_FOLDER}"/"${PLAYLIST_NAME}"/Named_Boxarts
cp -v "${ROM_FOLDER}"/"${SYSTEM}"/media/screenshots/* "${THUMBNAILS_FOLDER}"/"${PLAYLIST_NAME}"/Named_Snaps
#cp -v "${ROM_FOLDER}"/"${SYSTEM}"/media/title/* "${THUMBNAILS_FOLDER}"/"${PLAYLIST_NAME}"/Named_Titles