#
# set +o errexit -o noglob -o nounset is assumed.
#

#
# Private globals and subroutines
#
RTLP_FILEOP_LOG=0;
rtl_fileop_set_log() { RTLP_FILEOP_LOG="${1}"; };

rtlp_fileop_check() {
	local _prefix="${1}" _pname="" _rname=""; shift;
	while [ "${#}" -gt 0 ]; do
		return 0;
	shift; done;
};

rtlp_fileop_log() {
	local _msg="${1}";
	if [ "${RTLP_FILEOP_LOG:-0}" -eq 1 ]; then
		rtl_log_msg debug "${_msg}";
	fi;
};


rtl_fileop() {
	local _op="${1}" _dst="" _group="" _install_args="" _mode="" _owner="" _rc=0 _src=""; shift;
	case "${_op}" in
	cd)	if [ \( -z "${1}" \) -o ! \( -L "${1}" -o -e "${1}" \) ]; then
			rtl_log_msg fatalexit "Invalid or non-existent directory \`%s'." "${1}";
		elif rtlp_fileop_check "${PREFIX:-}" "${1}"; then
			rtlp_fileop_log "Changing working directory to \`${1}'.";
			cd -- "${1}"; _rc="${?}";
		fi; ;;
	chmod)	if [ "${#}" -lt 2 ]; then
			rtl_log_msg fatalexit "Missing parameters (in: chmod %s.)" "${*}";
		elif _mode="${1}" && shift\
		&&   rtlp_fileop_check "${PREFIX:-}" "${*}"; then
			rtlp_fileop_log "Changing file mode bits of \`${*}' to \`${_mode}'.";
			chmod -- "${_mode}" "${@}"; _rc="${?}";
		fi; ;;
	chgrp)	if [ "${#}" -lt 2 ]; then
			rtl_log_msg fatalexit "Missing parameters (in: chgrp %s.)" "${*}";
		elif _group="${1}" && shift\
		&&   rtlp_fileop_check "${PREFIX:-}" "${*}"; then
			rtlp_fileop_log "Changing file group of \`${*}' to \`${_group}'.";
			chgrp -- "${_group}" "${@}"; _rc="${?}";
		fi; ;;
	chown)	if [ "${#}" -lt 2 ]; then
			rtl_log_msg fatalexit "Missing parameters (in: chown %s.)" "${*}";
		elif _owner="${1}" && shift\
		&&   rtlp_fileop_check "${PREFIX:-}" "${*}"; then
			rtlp_fileop_log "Changing file owner of \`${*}' to \`${_owner}'.";
			chown -- "${_owner}" "${@}"; _rc="${?}";
		fi; ;;
	cp_follow)
		if [ "${#}" -lt 2 ]; then
			rtl_log_msg fatalexit "Missing parameters (in: cp_follow %s}.)" "${*}";
		elif rtlp_fileop_check "${PREFIX:-}" "${*}"; then
			_src="${*}"; _src="${_src% *}";
			_dst="${*}"; _dst="${_dst##* }";
			rtlp_fileop_log "Copying \`${_src}' into \`${_dst}' w/ -pLR.";
			cp -pLR -- "${@}"; _rc="${?}";
		fi; ;;
	cp)	if [ "${#}" -lt 2 ]; then
			rtl_log_msg fatalexit "Missing parameters (in: cp %s.)" "${*}";
		elif rtlp_fileop_check "${PREFIX:-}" "${*}"; then
			_src="${*}"; _src="${_src% *}";
			_dst="${*}"; _dst="${_dst##* }";
			rtlp_fileop_log "Copying \`${_src}' into \`${_dst}' w/ -pPR.";
			cp -pPR -- "${@}"; _rc="${?}";
		fi; ;;
	install)
		if [ "${#}" -lt 2 ]; then
			rtl_log_msg fatalexit "Missing parameters (in: install %s.)" "${*}";
		else	_dst="$(while [ ""${#}"" -gt 2 ]; do shift; done; printf "%s" "${2}")";
			_install_args="$(while [ ""${#}"" -gt 2 ]; do printf "%s" "${1}"; shift; done)";
			_src="$(while [ ""${#}"" -gt 2 ]; do shift; done; printf "%s" "${1}")";
			if rtlp_fileop_check "${PREFIX:-}" "${_dst}" "${_src}"; then
				rtlp_fileop_log "Installing \`${_src}' into \`${_dst}' w/ ${_install_args}.";
				install "${@}"; _rc="${?}";
			fi;
		fi; ;;
	ln_symbolic)
		if [ \( -z "${1}" \) -o \( -z "${2}" \) ]; then
			rtl_log_msg fatalexit "Missing parameters (in: ln_symbolic %s.)" "${*}";
		elif rtlp_fileop_check "${PREFIX:-}" "${2}"; then
			if rtl_fileop test "${2}"; then
				rtl_fileop rm "${2}";
			fi;
			if [ "${?}" -eq 0 ]; then
				rtlp_fileop_log "Linking \`${1}' to \`${2}' w/ -fs";
				ln -fs -- "${1}" "${2}"; _rc="${?}";
			fi;
		fi; ;;
	mv)	if [ \( -z "${1}" \) -o \( -z "${2}" \) ]; then
			rtl_log_msg fatalexit "Missing parameters (in: mv %s.)" "${*}";
		elif rtlp_fileop_check "${PREFIX:-}" "${1}" "${2}"; then
			rtlp_fileop_log "Moving \`${1}' to \`${2}' w/ -fs";
			mv -f -- "${1}" "${2}"; _rc="${?}";
		fi; ;;
	touch)	if [ -z "${1}" ]; then
			rtl_log_msg fatalexit "Missing parameters (in: touch %s.)" "${*}";
		elif rtlp_fileop_check "${PREFIX:-}" "${1}"; then
			rtlp_fileop_log "Touching file \`${1}'${2:+ w/ timestamp \`${2}\'}.";
			touch ${2:+-t "${2}"} -- "${1}"; _rc="${?}";
		fi; ;;
	mkdir|mkfifo|rm|source|source_opt|test)
		while [ \( "${?}" -eq 0 \) -a \( ""${#}"" -gt 0 \) ]; do
			if [ -z "${1}" ]; then
				rtl_log_msg fatalexit "Missing parameters (in: %s %s.)" "${_op}" "${*}";
			elif [ "${_op}" = mkdir ]\
			&& [ ! -d "${1}" ]\
			&& rtlp_fileop_check "${PREFIX:-}" "${1}"; then
				if rtl_fileop test "${1}"; then
					rtl_fileop rm "${1}";
				fi;
				rtlp_fileop_log "Making directory \`${1}'.";
				mkdir -p -- "${1}"; _rc="${?}";
			elif [ "${_op}" = mkfifo ]\
			&& rtlp_fileop_check "${PREFIX:-}" "${1}"; then
				if rtl_fileop test "${1}"; then
					rtl_fileop rm "${1}";
				fi;
				rtlp_fileop_log "Creating FIFO \`${1}'.";
				rtlp_fileop_check "${PREFIX:-}" "${1}";
				mkfifo -- "${1}"; _rc="${?}";
			elif [ "${_op}" = rm ]\
			&& rtl_fileop test "${1}"\
			&& rtlp_fileop_check "${PREFIX:-}" "${1}"; then
				rtlp_fileop_log "Removing directory or file \`${1}'.";
				rm -rf -- "${1}"; _rc="${?}";
			elif [ "${_op}" = source ]\
			&& rtlp_fileop_check "${PREFIX:-}" "${1}"; then
				rtlp_fileop_log "Sourcing file \`${1}'.";
				. "${1}"; _rc="${?}";
			elif [ "${_op}" = source_opt ]\
			&& rtl_fileop test "${1}"\
			&& rtlp_fileop_check "${PREFIX:-}" "${1}"; then
				rtlp_fileop_log "Sourcing file \`${1}'.";
				. "${1}"; _rc="${?}";
			elif [ "${_op}" = test ]\
			&& rtlp_fileop_check "${PREFIX:-}" "${1}"\
			&& ! [ \( -L "${1}" \) -o \( -e "${1}" \) ]; then
				return 1;
			fi; shift;
		done; ;;
	*)	rtl_log_msg fatalexit "Error: rtl_fileop() called w/ invalid parameter(s): %s" "${*}"; ;;
	esac; return "${_rc}";
};

# vim:filetype=sh