steam-icons

#!/bin/bash

set -e
set -o pipefail

APP="com.valvesoftware.Steam"
APP_DIR="${HOME}/.var/app/${APP}"

################################################################################

function is-game {
    local file pattern

    file="${1}"

    patterns=(
        'Exec=steam steam://rungameid/'
        'Icon=steam_'
    )

    for pattern in "${patterns[@]}"; do
        if ! grep "${pattern}" "${file}" &>/dev/null; then
            return 2
        fi
    done
}

function icon {
    local id icons

    id="${1}"
    icons="${APP_DIR}/.local/share/icons/hicolor/"

    find "${icons}" -name "steam_icon_${id}.png" | tail -n 1
}

function desktop-file {
    local id name icon

    id="${1}"
    name="${2}"

    icon="$(icon "${id}")"

    cat <<EOM
[Desktop Entry]
Name=${name}
Comment=Play this game on Steam
Exec=flatpak run com.valvesoftware.Steam steam://rungameid/${id}
Icon=${icon}
Terminal=false
Type=Application
Categories=Game;
EOM
}

function games {
    local -a files

    mapfile -t files < <(
        find "${APP_DIR}/.local/share/applications/" -name '*.desktop'
    )

    for f in "${files[@]}"; do
        if is-game "${f}"; then
            id=$(grep -oP 'Exec=.+ steam://rungameid/\K\w+' "${f}")
            name=$(grep -oP 'Name=\K.+' "${f}")
            dest="${HOME}/.local/share/applications/${name}.desktop"
            desktop-file "${id}" "${name}" > "${dest}"
        fi
    done
}

function main {
    games
}

main "${@}"; exit