newutil

#! /usr/bin/bash

################################################################################
# Copyright: brown.liuzan@outlook.com
# Version: 1.2
# Date: 20230329
# Description: Used to create a module template.
################################################################################

source ./lib/environments.sh
source ./lib/errno.sh
source ./lib/printer.sh

function usage() {
	print_bold_green "Usage: newutil [-u|--utility-name <UtilityFileName>]"
	print_bold_green "               [-h|--help]"
	print_bold_green "Note:"
	print_green "    -u <UtilityFileName>, specify the bash utility file name; must be [a-zA-Z0-9_]+"
}

function check_and_create_empty_utility_file() {
	local vFileName=$1
	if ! [[ ${vFileName} =~ [a-zA-Z0-9_]+ ]]; then
		print_red_t "Invalid bash utility file name: ${vFileName}"
		usage
		exit ${EINVAL}
	fi

	if [[ -f ${vFileName} ]]; then
		print_yellow_t "Utility file has alread existed: ${vFileName}"
		exit ${EEXIST}
	fi

	touch ${vFileName}
	local vRc=$?
	if [[ ${vRc} -ne 0 ]]; then
		print_red_t "[${vRc}]Failed to create a bash utility template file: ${vFileName}"
		exit ${EPERM}
	fi

	chmod a+x ${vFileName}
	vRc=$?
	if [[ ${vRc} -ne 0 ]]; then
		print_red_t "[${vRc}]Failed to make this bash utility template file executable: ${vFileName}"
		exit ${EPERM}
	fi
}

function main() {
	local vRc
	local vBashUtilityFileName
	for((i = 1; i <= $#; ++i)); do
		case ${!i} in
		'-u' | '--utility-name')
			i=$((i + 1))
			vBashUtilityFileName=${!i}
			check_and_create_empty_utility_file ${vBashUtilityFileName}
			;;
		'-h' | '--help')
			usage
			exit ${EOK}
			;;
		*)
			usage
			exit ${EINVAL}
			;;
		esac
	done

	echo '#! /usr/bin/bash' > ${vBashUtilityFileName}
	echo >> ${vBashUtilityFileName}
	echo '################################################################################' >> ${vBashUtilityFileName}
	echo '# Copyright: brown.liuzan@outlook.com' >> ${vBashUtilityFileName}
	echo '# Version: 1.0' >> ${vBashUtilityFileName}
	echo "# Date: $(date +%Y-%M-%d)" >> ${vBashUtilityFileName}
	echo '# Description:' >> ${vBashUtilityFileName}
	echo '################################################################################' >> ${vBashUtilityFileName}
	echo >> ${vBashUtilityFileName}
	echo >> ${vBashUtilityFileName}
	echo '####Imports of other module files####' >> ${vBashUtilityFileName}
	echo "source ${ZBASH_LIB_ROOT}/environments.sh" >> ${vBashUtilityFileName}
	echo "source ${ZBASH_LIB_ROOT}/errno.sh" >> ${vBashUtilityFileName}
	echo "source ${ZBASH_LIB_ROOT}/printer.sh" >> ${vBashUtilityFileName}
	echo >> ${vBashUtilityFileName}
	echo >> ${vBashUtilityFileName}
	echo '####Definition of global parameters####' >> ${vBashUtilityFileName}
	echo >> ${vBashUtilityFileName}
	echo >> ${vBashUtilityFileName}
	echo '####Definition of functions####' >> ${vBashUtilityFileName}
	echo "function ${vBashUtilityFileName}_main() {" >> ${vBashUtilityFileName}
	echo '}' >> ${vBashUtilityFileName}
	echo >> ${vBashUtilityFileName}
	echo "${vBashUtilityFileName}_main \"\$@\"" >> ${vBashUtilityFileName}
	echo >> ${vBashUtilityFileName}
	echo >> ${vBashUtilityFileName}
	echo '####Unit test section####' >> ${vBashUtilityFileName}
	echo 'if false; then' >> ${vBashUtilityFileName}
	echo '    print_bold_green_t "====Unit test begin===="' >> ${vBashUtilityFileName}
	echo '    print_bold_green_t "====Unit test end===="' >> ${vBashUtilityFileName}
	echo 'fi' >> ${vBashUtilityFileName}
}

main "$@"