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# Copyright 2010-2015 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

inherit config multilib

DESCRIPTION="Manage php installations"
MAINTAINER="php-bugs@gentoo.org"

MODULES="cli apache2 fpm cgi"

cli_link="${EROOT}"/usr/bin/php
fpm_link="${EROOT}"/usr/bin/php-fpm
cgi_link="${EROOT}"/usr/bin/php-cgi

cleanup_sapis() {
	local m
	local link
	for m in $MODULES ; do
		cleanup_sapi $m
	done
}

cleanup_sapi() {
	local l=${1}_link
	local link=${!l}
	if [[ -L $link && ! -e $link ]] ; then
		echo -n "Broken link for $1"
		if update_sapi $1 ; then
			echo ", updated version to $(get_active_$1)"
			return
		else
			rm $link

			return
		fi
	fi
	return 1
}

update_sapi() {
	local target=$(find_targets_$1 | tail -n 1)
	local current=$(get_active_$1)
	[[ -z $target ]] && return 1
	[[ $current = $target ]] && return 1
	set_$1 $target
}

get_libdirs() {
	local dir libdirs
	for dir in $(list_libdirs); do
		[[ -L ${EROOT}/usr/${dir} ]] && continue
		ls "${EROOT}"/usr/${dir}/php*.* > /dev/null 2>&1 || continue

		libdirs+=' '/usr/${dir}
	done
	echo ${libdirs:-/usr/lib}
}

get_active_libdir() {
	local dir
	for dir in $(get_libdirs); do
		echo ${dir}
		return
	done
	echo /usr/lib
}

cleanup() {
	local target=$(find_targets_$1 | tail -n 1)
	[[ -z $target ]] &&
	set_$1 $target
}

find_targets() {
	local dir dirs libdir
	for libdir in $(get_libdirs); do
		for dir in "${EROOT}"${libdir}/php*.*; do
			t=$(basename $dir)
			has $t $dirs || dirs="${dirs} $t"
		done
	done
  echo $dirs
}

find_targets_apache2() {
	local libs target libdir
	for target in $(find_targets); do
		for libdir in $(get_libdirs); do
			libs="${EROOT}${libdir}/$target/apache2/libphp[57].so"
			for lib in $libs; do
				[[ -f "${lib}" ]] && echo $target
			done
		done
	done | @SORT@ | @UNIQ@
}

find_targets_cli() {
	local target libdir
	for target in $(find_targets); do
		for libdir in $(get_libdirs); do
			[[ -f ${EROOT}${libdir}/$target/bin/php ]] && echo $target
		done
	done | @SORT@ | @UNIQ@
}

find_targets_fpm() {
	local target libdir
	for target in $(find_targets); do
		for libdir in $(get_libdirs); do
			[[ -f ${EROOT}${libdir}/$target/bin/php-fpm ]] && echo $target
		done
	done | @SORT@ | @UNIQ@
}

find_targets_cgi() {
	local target libdir
	for target in $(find_targets); do
		for libdir in $(get_libdirs); do
			[[ -f ${EROOT}${libdir}/$target/bin/php-cgi ]] && echo $target
		done
	done | @SORT@ | @UNIQ@
}

get_active_cli() {
	# See get_active_apache2() for an explanation of the sed call.
	local target=$(canonicalise "${EROOT}"/usr/bin/php)
	local ver="s:.*/usr/.*/\(php[0-9]\.[0-9][0-9]*\)/bin/php:\1:p"
	[[ -a "${target}" ]] &&	echo "${target}" | @SED@ -ne "${ver}"
}

get_active_cgi() {
	# See get_active_apache2() for an explanation of the sed call.
	local target=$(canonicalise "${EROOT}"/usr/bin/php-cgi)
	local ver="s:.*/usr/.*/\(php[0-9]\.[0-9][0-9]*\)/bin/php-cgi:\1:p"
	[[ -a "${target}" ]] &&	echo "${target}" | @SED@ -ne "${ver}"
}

get_active_fpm() {
	# See get_active_apache2() for an explanation of the sed call.
	local target=$(canonicalise "${EROOT}"/usr/bin/php-fpm)
	local ver="s:.*/usr/.*/\(php[0-9]\.[0-9][0-9]*\)/bin/php-fpm:\1:p"
	[[ -a "${target}" ]] &&	echo "${target}" | @SED@ -ne "${ver}"
}


get_active_apache2() {
	local libs target ver
	libs="${EROOT}$(get_active_libdir)/apache2/modules/libphp[57].so"

	# This sed expression finds the "display name" of the PHP version
	# corresponding to a copy of libphp. For example, it parses the
	# string "php5.6" out of "/usr/lib64/php5.6/apache2/libphp5.so".
	ver="s:.*/usr/.*/\(php[0-9]\.[0-9]\)/apache2/libphp[57].so:\1:p"
	for lib in $libs; do
		if [[ -L "${lib}" ]] ; then
			target=$(canonicalise "${lib}")
			if [[ -a "${target}" ]] ; then
				echo "${target}" | @SED@ -ne "${ver}"
				# Short-circuit here because we should never have more
				# than one active version.
				return
			fi
		fi
	done
}

resolv_target() {
	local targets=( $(find_targets_$1) )
	if is_number $2; then
		if [[ $2 -le ${#targets[@]} && $2 -gt 0 ]] ; then
			echo "${targets[ $(( $2 - 1 )) ]}"
		fi
	elif has $2 ${targets[@]}; then
	  echo $2
	fi
}

check_module() {
	has $1 $(echo $MODULES) || \
		die -q "Please choose one of the following modules: ${MODULES}"
}

## Actual actions

list_apache2() {
	local targets
	local a
	targets=( $(find_targets_apache2) )
	a=$(get_active_apache2)
	for (( i = 0; i < ${#targets[@]}; i++ )) ; do
		if [[ $a == ${targets[i]} ]] ; then
			targets[i]=$(highlight_marker "${targets[i]}")
		fi
	done
	write_numbered_list -m "(none found)" "${targets[@]}"
}

list_cli() {
	local targets
	local a
	targets=( $(find_targets_cli) )
	a=$(get_active_cli)
	for (( i = 0; i < ${#targets[@]}; i++ )) ; do
		if [[ $a == ${targets[i]} ]] ; then
			targets[i]=$(highlight_marker "${targets[i]}")
		fi
	done
	write_numbered_list -m "(none found)" "${targets[@]}"
}

list_cgi() {
	local targets
	local a
	targets=( $(find_targets_cgi) )
	a=$(get_active_cgi)
	for (( i = 0; i < ${#targets[@]}; i++ )) ; do
		if [[ $a == ${targets[i]} ]] ; then
			targets[i]=$(highlight_marker "${targets[i]}")
		fi
	done
	write_numbered_list -m "(none found)" "${targets[@]}"
}

list_fpm() {
	local targets
	local a
	targets=( $(find_targets_fpm) )
	a=$(get_active_fpm)
	for (( i = 0; i < ${#targets[@]}; i++ )) ; do
		if [[ $a == ${targets[i]} ]] ; then
			targets[i]=$(highlight_marker "${targets[i]}")
		fi
	done
	write_numbered_list -m "(none found)" "${targets[@]}"
}

set_apache2() {
	local libdir t=$(resolv_target apache2 $1)
	[[ -z $t ]] && die -q "Bad target"
	for libdir in $(get_libdirs); do
		rm -f "${EROOT}${libdir}/apache2/modules/libphp[57].so"
		@LN_S@ --force "../../$t/apache2/libphp${t:3:1}.so" \
			"${EROOT}${libdir}/apache2/modules/" || \
			die -q "Failed to set symlink for ${EPREFIX}${libdir}/apache2/modules/libphp${t:3:1}.so"
	done
	echo "You have to run \`${EPREFIX}/etc/init.d/apache2 restart' for the changes to take effect"
}

set_cli() {
	local file libdir t=$(resolv_target cli $1)
	[[ -z $t ]] && die -q "Bad target"
	for file in php phpize php-config; do
		@LN_S@ --force ../..$(get_active_libdir)/$t/bin/$file \
			"${EROOT}"/usr/bin/$file || \
			die -q "Failed to create symlink for ${file}"
	done
}

set_cgi() {
	t=$(resolv_target cgi $1)
	[[ -z $t ]] && die -q "Bad target"
	@LN_S@ --force ../..$(get_active_libdir)/$t/bin/php-cgi \
		"${EROOT}"/usr/bin/php-cgi || \
		die -q "Failed to create symlink for php-cgi"
}

set_fpm() {
	local t=$(resolv_target fpm $1)
	[[ -z $t ]] && die -q "Bad target"
	@LN_S@ --force ../..$(get_active_libdir)/$t/bin/php-fpm \
		"${EROOT}"/usr/bin/php-fpm || \
		die -q "Failed to create symlink for the php-fpm binary"
	echo "You have to run \`${EPREFIX}/etc/init.d/php-fpm restart' for the changes to take effect"
}
## set action

describe_set() {
	echo "Sets the current configuration for a module"
}

describe_set_parameters() {
	echo "<module> <target>"
}

describe_set_options() {
	echo "module:	one of ${MODULES}"
	echo "target:	Target name or number (from the 'list' action)"
}


do_set() {
	check_module $1
	set_$1 $2
}



## List action

describe_list() {
	echo "Lists available php installs for a module"
}

describe_list_parameters() {
	echo "<module>"
}

describe_list_options() {
	echo "module: one of ${MODULES}"
}

do_list() {
	check_module $1
	list_$1
}

## Show action

describe_show() {
	echo "Lists available php installs for a module"
}

describe_show_parameters() {
	echo "<module>"
}

describe_show_options() {
	echo "module: one of ${MODULES}"
}

do_show() {
	check_module $1
	get_active_$1
}

## update action

describe_update() {
	echo "Automatically update the php versions"
}

describe_update_parameters() {
	echo "<module> [ifunset]"
}

describe_update_options() {
	echo "module: one of ${MODULES}"
	echo "ifunset : Do not override existing implementation"
}

do_update() {
    check_module $1
	[[ -z ${2} || ( -z ${3} && ( ${2} == ifunset || ${2} == '--if-unset' ) ) ]] || \
		die -q "Usage error"

	if [[ (${2} == ifunset || ${2} == '--if-unset') && -n $(get_active_$1) ]];
	then
		return
	fi

    update_sapi $1 || echo "Nothing to update"
}

## cleanup action

describe_cleanup() {
	echo "Automatically clean up stale links"
}

describe_cleanup_parameters() {
	echo
}

describe_cleanup_options() {
	echo
}

do_cleanup() {
    cleanup_sapis
}