#!/bin/sh
#
# Copyright (c) 2022-2023, Jesús Daniel Colmenares Oviedo <DtxdF@disroot.org>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice, this
#   list of conditions and the following disclaimer.
#
# * Redistributions in binary form must reproduce the above copyright notice,
#   this list of conditions and the following disclaimer in the documentation
#   and/or other materials provided with the distribution.
#
# * Neither the name of the copyright holder nor the names of its
#   contributors may be used to endorse or promote products derived from
#   this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

. "${AJ_CONFIG}"
. "${LIBDIR}/load"

lib_load "${LIBDIR}/log"
lib_load "${LIBDIR}/check_func"
lib_load "${LIBDIR}/jail"
lib_load "${LIBDIR}/replace"

COPY_OPTION_SRC=1
COPY_OPTION_DST=2

main()
{
	local args="$1"
	if lib_check_empty "${args}"; then
		lib_err - "usage: COPY [--glob|--glob-left|--glob-right] [--verbose] [--jail <jail>] <source>"
		lib_err - "               [<destination>]"
		exit ${EX_USAGE}
	fi
	
	# Options
	local glob_left=0
	local glob_right=0
	local verbose=0
	local jail_name=
	
	# Arguments
	local args_list
	local total_items
	local current_index=0

	args_list=`lib_split_jailparams "${args}"` || exit $?
	total_items=`printf "%s\n" "${args_list}" | wc -l`
	
	while [ ${current_index} -lt ${total_items} ]; do 
		current_index=$((current_index+1))
		local arg=`printf "%s\n" "${args_list}" | head -${current_index} | tail -n 1`
		if lib_check_empty "${arg}"; then
			continue
		fi

		local optarg=
		case "${arg}" in
			--jail)
				current_index=$((current_index+1))
				if [ ${current_index} -eq ${total_items} ]; then
					main # usage
				fi

				optarg=`printf "%s\n" "${args_list}" | head -${current_index} | tail -n 1`
				if lib_check_empty "${optarg}"; then
					main # usage
				fi
				;;
		esac

		case "${arg}" in
			--glob)
				glob_left=1
				glob_right=1
				;;
			--glob-left)
				glob_left=1
				;;
			--glob-right)
				glob_right=1
				;;
			--verbose)
				verbose=1
				;;
			--jail)
				jail_name="${optarg}"
				;;
			--)
				break
				;;
			--*)
				main # usage
				;;
			*)
				break
				;;
		esac
	done
	current_index=$((current_index-1))

	# copy options
	local src= dst=

	local option=0
	while [ ${current_index} -lt ${total_items} ]; do 
		option=$((option+1))
		current_index=$((current_index+1))

		local arg=`printf "%s\n" "${args_list}" | head -${current_index} | tail -n 1`

		if lib_check_empty "${arg}"; then
			main # usage
		fi

		if [ ${option} -eq ${COPY_OPTION_SRC} ]; then
			src="${arg}"
		elif [ ${option} -eq ${COPY_OPTION_DST} ]; then
			dst="${arg}"
		else
			break
		fi
	done

	if [ -z "${src}" ]; then
		main # usage
	fi

	local escape_chars
	escape_chars='`"\'

	local workdir
	local workdir_file="${MAKEJAIL_TEMPDIR}/workdir/${MAKEJAIL_CURRENT_STAGE}"
	if [ -f "${workdir_file}" ]; then
		local workdir_escape_chars='`"\$'

		workdir=`head -1 -- "${workdir_file}"`
		workdir=`lib_escape_string "${workdir}" "" "${workdir_escape_chars}"`
	else
		workdir=
	fi

	if [ -n "${jail_name}" ]; then
		local escape_jail_name=`lib_escape_string "${jail_name}" "" "${escape_chars}"`

		cat << EOF
if ! lib_check_jailname "${escape_jail_name}"; then
	lib_err \${EX_DATAERR} "Invalid jail name \"${escape_jail_name}\""
fi
EOF
		src="\${JAILDIR}/${jail_name}/jail/${src}"
	fi
	local escape_src=`lib_escape_string "${src}" "" "${escape_chars}"`

	local escape_dst=
	if [ -n "${dst}" ]; then
		escape_dst=`lib_escape_string "${dst}" "" "${escape_chars}"`
	fi
	escape_dst="${workdir}/${escape_dst}"
	escape_dst="\${APPJAIL_JAILDIR}${escape_dst}"

	local cp_args
	if [ ${verbose} -eq 1 ]; then
		cp_args="-v"
	fi

	local glob_left_s=
	if [ "${glob_left}" -eq 1 ]; then
		glob_left_s="*"
	fi

	local glob_right_s=
	if [ "${glob_right}" -eq 1 ]; then
		glob_right_s="*"
	fi

	echo "cp ${cp_args} -a -- ${glob_left_s}\"${escape_src}\"${glob_right_s} \"${escape_dst}\""
}

main "$@"
