#!/bin/sh
#
#  php5enmod - a php5 module manager for Debian
#
#  Copyright 2013 Ondřej Surý <ondrej@sury.org>
#
# This program is licensed at your choice under the terms of the GNU General
# Public License version 2+ or under the terms of the PHP License 3.01.
#
# For GPL-2+:
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
# USA.
#
# For PHP 3.01:
# This source file is subject to version 3.01 of the PHP license,
# that is bundled with this package in the file LICENSE, and is
# available through the world-wide-web at the following url:
# http://www.php.net/license/3_01.txt
# If you did not receive a copy of the PHP license and are unable to
# obtain it through the world-wide-web, please send a note to
# license@php.net so we can mail you a copy immediately.
#

warning() {
    echo "WARNING: ${@}" >&2
}

remove_state() {
    local action=$1
    local sapi=$2
    local modname=$3

    local state_dir="$(get_state_dir $sapi)"
    rm -f "${state_dir}/${action}_by_admin/$modname"
    rm -f "${state_dir}/${action}_by_maint/$modname"

    return 0
}

mod_registry() {
    local action=$1
    local modname=$2
    local registry_dir="$(get_registry_dir)"
    local registry_file="$registry_dir/$modname"

    case $action in
	register)
	    if [ ! -d "$registry_dir" ]; then
		mkdir -p "$registry_dir"
	    fi
	    touch "$registry_file"
	    ;;
	unregister)
	    rm -f "$registry_file"
	    ;;
	status)
	    if [ -e "$registry_file" ]; then
		return 0
	    else
		return 1
	    fi
	    ;;
	*)
	    return 1
	    ;;
    esac

    return 0
}

record_state() {
    local action=$1
    local sapi=$2
    local modname=$3

    local state_dir="/var/lib/php5/modules/${sapi}"
    local admin_state="${state_dir}/${action}_by_admin/$modname"
    local maint_state="${state_dir}/${action}_by_maint/$modname"

    if [ -e "$admin_state" ]; then
	return
    fi

    if [ -e "$maint_state" ]; then
	if [ "$MAINT_MODE" = "yes" ]; then
	    return
	else
	    rm "$maint_state"
	fi
    fi

    # cleanup previous state
    remove_state disabled $sapi $modname
    remove_state enabled $sapi $modname

    if [ "$MAINT_MODE" = "yes" ]; then
	mkdir -p "$(dirname $maint_state)"
	touch "$maint_state"
    else
	mkdir -p "$(dirname $admin_state)"
	touch "$admin_state"
    fi

    return 0
}

output() {
    if [ "$QUIET" != "yes" ]; then
	echo "$@"
    fi
}

get_priority() {
    local sapi=$1
    local modname=$2

    local source_ini="/etc/php5/mods-available/${modname}.ini"

    module_ret=0
    module_exists $modname || module_ret=$?

    if [ "$module_ret" -eq 0 ]; then
	priority=$(sed -ne "s/^; priority=\([0-9]\+\)$/\\1/p" $source_ini)
	[ -z "$priority" ] && priority=20
	echo $priority
	return 0
    fi

    return $module_ret
}

get_live_link() {
    local sapi=$1
    local modname=$2
    local priority=$3
    echo "/etc/php5/$sapi/conf.d/$priority-$modname.ini"
}

get_live_link_content() {
    local sapi=$1
    local modname=$2
    local priority=$3
    echo "../../mods-available/$modname.ini"
}

module_exists() {
    local modname=$1
    local source_ini="/etc/php5/mods-available/${modname}.ini"

    if [ ! -r "${source_ini}" ]; then
	return 1
    fi
    return 0
}

module_cleanup() {
    local sapi=$1
    local modname=$2
    local priority=$3

    if [ -L "/etc/php5/conf.d/$priority-$modname.ini" ]; then
	rm "/etc/php5/conf.d/$priority-$modname.ini";
    fi
}

get_state_dir() {
    local sapi=$1
    echo "/var/lib/php5/modules/$sapi"
    return 0
}

get_registry_dir() {
    echo "/var/lib/php5/modules/registry"
    return 0
}

get_sapi_dir() {
    echo "/usr/share/php5/sapi"
    return 0
}

list_parts() {
    local dir=$1
    local regex=${2:-}
    local args="! ( -name '*.dpkg-old' -name '*.dpkg-new' -name '*.dpkg-dist' -name '*~' -name '*.bak' -name '*.ucf-old' -name '*.ucf-new' -name '*.ucf-dist' -name '*%' )"

    if [ -d "$dir" ]; then
	if [ -n "$regex" ]; then
	    args="${args} -regex '$regex'"
	fi
	find "$dir" -mindepth 1 -maxdepth 1 -printf '%f\n' $args
	return $?
    else
	return 1
    fi    
}