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#!/bin/sh
#
# phpquery - a PHP module manager for Debian
#
# Copyright 2013-2015 Ondřej Surý <ondrej@sury.org>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy of
# this software and associated documentation files (the "Software"), to deal in
# the Software without restriction, including without limitation the rights to
# use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
# the Software, and to permit persons to whom the Software is furnished to do so,
# subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
# FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
# COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
# IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

set -ue

SCRIPT_NAME=${0##*/}
QUIET=no

. /usr/lib/php/php-helper

usage() {
    [ -n "$@" ] && warning $@
    echo "usage: ${SCRIPT_NAME} [ -d ] [ -q ] -v version_name -s sapi_name [ -m module_name ] [ -M ] [ -S ] [ -V ]"
    exit 1
}

check_mod() {
    local version=$1
    local sapi=$2
    local modname=$3

    if ! module_exists $version $modname; then
	output "No module matches $modname"
	return 1
    fi

    local priority=$(get_priority $version $sapi $modname)
    local live_link=$(get_live_link $version $sapi $modname $priority)
    local live_link_content=$(get_live_link_content $version $sapi $modname $priority)

    found=no
    local state_dir="$(get_state_dir $version $sapi)"
    if [ -e "${live_link}" ] ; then
	if [ -h "${live_link}" ] ; then
	    local content="$(readlink "${live_link}")"
	    if [ "${content}" = "${live_link_content}" ] ; then
		if [ -e "${state_dir}/enabled_by_admin/$modname" ]; then
		    output "$modname (Enabled for $sapi by local administrator)"
		    return 0
		elif [ -e "${state_dir}/enabled_by_maint/$modname" ]; then
		    output "$modname (Enabled for $sapi by maintainer script)"
		    return 0
		fi
		output "$modname (Enabled for $sapi by unknown)"
		return 0
	    else
		output "Module $modname symlink was modified by local administrator."
		return 34
	    fi
	fi
    else
	if [ -e "${state_dir}/disabled_by_admin/$modname" ]; then
	    output "No module matches $modname (Disabled for $sapi by local administrator)"
	    return 32
	elif [ -e "${state_dir}/disabled_by_maint/$modname" ]; then
	    output "No module matches $modname (Disabled for $sapi by maintainer script)"
	    return 33
	fi
	output "No module matches $modname (Disabled for $sapi by unknown)"
	return 1
    fi
}

list_mod() {
    local _version=$1
    local _sapi=$2
    local verbose=$3

    if [ "$_version" = "ALL" ]; then
	versions=$(list_version)
    else
	versions=$_version
    fi

    for version in $versions; do
	local registry_dir="$(get_registry_dir "$version")"
	if [ -d "$registry_dir" ]; then
	    for mod in $(list_parts "$registry_dir"); do
		if [ "$_sapi" = "ALL" ]; then
		    sapis=$(list_sapi $version)
		else
		    sapis="$_sapi"
		fi
		if [ "$verbose" = "yes" ]; then
		    for sapi in $sapis; do
			check_mod $version $sapi $mod
		    done
		else
		    echo $mod
		fi
	    done
	fi
    done
    return 0
}

list_version() {
    local version_dir="$(get_version_dir)"
    if [ -d "$version_dir" ]; then
	local version=
	for version in $(list_parts_regex "$version_dir" '.*[0-9]\.[0-9]'); do
	    echo $version;
	done | sort -rn
    fi
}

list_sapi() {
    local version=$1
    local sapi_dir="$(get_sapi_dir $version)"

    if [ -d "$sapi_dir" ]; then
	for sapi in $(list_parts "$sapi_dir"); do
	    echo $sapi;
	done
    fi
}

check_version() {
    local version=$1
    local version_dir=$(get_version_dir)
    if [ -d "$version_dir/$version" ]; then
	return 0
    fi
    return 1
}

check_sapi() {
    local version=$1
    local sapi=$2
    local sapi_dir="$(get_sapi_dir $version)"

    if [ -e "$sapi_dir/$sapi" ]; then
	return 0
    fi
    return 1
}

action() {
    local action=$1
    local version=$2
    local sapi=$3
    local mod=$4
    local verbose=$5

    ret=0
    case "$action" in
	check_mod)
	    [ -z "$version" -o -z "$sapi" ] && usage "You need to specify version (-v) and sapi (-s)"
	    check_version "$version" || usage "Invalid PHP version ($version) specified"
	    check_sapi "$version" "$sapi" || usage "Invalid SAPI ($sapi) specified"
	    check_mod "$version" "$sapi" "$mod" || ret=$?
	    ;;
	check_sapi)
	    [ -z "$version" ] && usage "You need to specify version (-v)"
	    check_version "$version" || usage "Invalid PHP version ($version) specified"
	    check_sapi "$version" "$sapi" || ret=$?
	    if [ "$ret" -eq 0 ]; then
		output "$sapi"
	    fi
	    ;;
	check_version)
	    check_version $version || ret=$?
	    if [ "$ret" -eq 0 ]; then
		output "$sapi"
	    fi
	    ;;
	list_version) list_version || ret=$?;;
	list_mod) list_mod "$version" "$sapi" "$verbose" || ret=$?;;
	list_sapi) list_sapi "$version" || ret=$?;;
	*) usage "Unknown action $action"; ret=3;;
    esac
    return $ret
}

verbose=no
action=
version=
sapi=
mod=

double_action() {
    usage "Cannot use $1 and $2 at the same time, pick only one mode of operation.";
}

while getopts ds:m:SMqv:V opt; do
    case $opt in
	v)
	    version="$OPTARG"
	    ;;
	V)
	    [ -n "$action" ] && double_action $action list_version;
	    action=list_version
	    ;;
	s)
	    sapi="$OPTARG"
	    ;;
	S)
	    [ -n "$action" ] && double_action $action list_sapi
	    action="list_sapi"
	    ;;
	m)
	    mod="$OPTARG"
	    ;;
	M)
	    [ -n "$action" ] && double_action $action list_mod
	    action="list_mod"
	    ;;
	q)
	    QUIET=yes
	    ;;
	d)
	    verbose=yes
	    ;;
	\?) usage "Unknown parameter specified";;
    esac
done
shift $(expr $OPTIND - 1)

if [ -z "$action" ]; then
    if [ -n "$mod" ]; then
	action=check_mod
    elif [ -n "$sapi" ]; then
	action=check_sapi
    elif [ -n "$version" ]; then
	action=check_version
    else
        usage "You need to specify at least one action."
    fi
fi

action "$action" "$version" "$sapi" "$mod" "$verbose"
exit $?