wordpress/rootfs/usr/local/bin/wp-theme

#!/usr/bin/env bash

# Download theme (curl)
# $1 - theme slug
# $2 - theme version (optional)
# Returns 0 on success, X on failure
download() {
    THEME_SLUG="${1:?download: THEME_SLUG is required}"
    THEME_VERSION="${2:-}"

    if [ -n "${THEME_VERSION}" ]; then
        THEME_FILENAME="${THEME_SLUG}.${THEME_VERSION}.zip"
    else
        THEME_FILENAME="${THEME_SLUG}.zip"
    fi

    curl --fail -gsO "https://downloads.wordpress.org/theme/${THEME_FILENAME}" || return $?
    echo "${THEME_FILENAME}"
    return 0
}

# Unpack theme (unzip)
# $1 - theme slug
# $2 - theme version (optional)
# Returns 0 on success, 1 on failure
unpack() {
    TARGET_THEMES_DIR="${TARGET_THEMES_DIR:?check: TARGET_THEMES_DIR is required}"
    THEME_SLUG="${1:?unpack: THEME_SLUG is required}"
    THEME_VERSION="${2:-}"

    if [ -n "${THEME_VERSION}" ]; then
        THEME_FILENAME="${THEME_SLUG}.${THEME_VERSION}.zip"
    else
        THEME_FILENAME="${THEME_SLUG}.zip"
    fi

    if [ -f "${THEME_FILENAME}" ]; then
        unzip -qq -d "${TARGET_THEMES_DIR}" "${THEME_FILENAME}" || return $?
        rm "${THEME_FILENAME}" -f
        return 0
    fi
    return 1
}

# Check if theme is installed
# $1 - theme slug
# Returns 0 if theme is installed, 1 otherwise
check() {
    TARGET_THEMES_DIR="${TARGET_THEMES_DIR:?check: TARGET_THEMES_DIR is required}"
    THEME_SLUG="${1:?check: THEME_SLUG is required}"

    THEME_PATH="${TARGET_THEMES_DIR}/${THEME_SLUG}"

    # Check if theme directory exists
    if [ ! -d "${THEME_PATH}" ]; then
        return 1
    fi

    # Check if theme theme.json exists - if yes, theme is probably installed successfully
    if [ -f "${THEME_PATH}/theme.json" ]; then
        return 0
    fi

    # Check if theme index.php exists - if yes, theme is probably installed successfully
    if [ -f "${THEME_PATH}/index.php" ]; then
        return 0
    fi

    # Check if theme directory is empty - if not, theme is probably installed successfully
    if [ "$(ls -A "${THEME_PATH}")" ]; then
        return 0
    fi

    # If we got here, then theme is not installed
    return 1
}

# Delete theme
# $1 - theme slug
# Returns 0 on success, X on failure
delete() {
    TARGET_THEMES_DIR="${TARGET_THEMES_DIR:?delete: TARGET_THEMES_DIR is required}"
    THEME_SLUG="${1:?delete: THEME_SLUG is required}"

    THEME_PATH="${TARGET_THEMES_DIR}/${THEME_SLUG}"

    # Check if theme directory exists
    if [ ! -d "${THEME_PATH}" ]; then
        return 1
    fi

    rm -rf "${THEME_PATH}"
    return $?
}


# Main function
main() {
    COMMAND="${1:?COMMAND is required}"
    TARGET_THEMES_DIR="${WP_THEMES_PATH:?WP_THEMES_PATH is required}"

    export TARGET_THEMES_DIR

    # Execute command by calling function with the same name
    case "${COMMAND}" in
    download)
        download "${@:2}"
        return $?
        ;;
    unpack)
        unpack "${@:2}"
        return $?
        ;;
    check)
        check "${@:2}"
        return $?
        ;;
    delete)
        delete "${@:2}"
        return $?
        ;;
    *)
        echo "Error: Unknown command '${COMMAND}'"
        return 1
        ;;
    esac
}

main "${@}"
exit $?