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#!/bin/sh
#
# phpenmod - 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
NEED_RESTART=no
MAINT_MODE=no

. /usr/lib/php/php-helper

usage() {
    [ -n "$@" ] && warning $@
    echo "usage: ${SCRIPT_NAME} [ -v ALL|php_version ] [ -s ALL|sapi_name ] module_name [ module_name_2 ]"
    exit 1
}

resolve_versions() {
    local versions=$1
    if [ "$versions" = "ALL" ]; then
	versions=$(phpquery -V)
    fi
    echo $versions
}

resolve_sapis() {
    local version=$1
    local sapis=$2
    
    if [ "$sapis" = "ALL" ]; then
	sapis=$(phpquery -S -v $version)
    fi
    echo $sapis
}

enmods() {
    local versions="$1"
    local sapis="$2"
    local mods="$3"
    local register="$4"
    local versions
    local sapis
    local version
    local sapi
    local mod
    
    for mod in $mods; do
	for version in $(resolve_versions "$versions"); do
	    for sapi in $(resolve_sapis "$version" "$sapis"); do
		enmod_ret=0
		enmod "$version" "$sapi" "$mod" || enmod_ret=$?
		case $enmod_ret in
		    0)
			NEED_RESTART=yes
			record_state enabled "$version" "$sapi" "$mod"
			;;
		esac
	    done
	    if [ "$register" = "yes" ]; then
		mod_registry register "$version" "$mod"
	    fi
	done
    done
}

dismods() {
    local versions="$1"
    local sapis="$2"
    local mods="$3"
    local register="$4"
    local purge="$5"
    local version
    local sapi
    local mod

    for mod in $mods; do
	for version in $(resolve_versions "$versions"); do
	    for sapi in $(resolve_sapis "$version" "$sapis"); do
		local dismod_ret=0
		dismod "$version" "$sapi" "$mod" "$purge" || dismod_ret=$?
		case $dismod_ret in
		    0)
			NEED_RESTART=yes
			record_state disabled "$version" "$sapi" "$mod"
			;;
		esac
	    done
	done
	if [ "$purge" = "yes" ]; then
	    remove_state enabled "$version" "$sapi" "$mod"
	    remove_state disabled "$version" "$sapi" "$mod"
	    mod_registry unregister "$version" "$mod"
	elif [ "$register" = "yes" ]; then
	    mod_registry unregister "$version" "$mod"
	fi
    done
}

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

    if ! module_exists "$version" "$modname"; then
	warning "Module $modname ini file doesn't exist under /etc/php/${version}/mods-available"
	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")

    local module_state=0
    phpquery -q -v "$version" -s "$sapi" -m "$modname" || module_state=$?

    case "$module_state" in
	# module enabled, but re-enable the conf.d link just in case
	0)
	    ;;
	# module not yet enabled
	1)
	    ;;
	# module disabled by maintainer script
	33)
	    ;;
	# module disabled by site administrator
	# enable module only if not running in maintainer mode
	32)
	    if [ "$MAINT_MODE" = "yes" ]; then
		warning "Not enabling the ${modname} module for PHP ${version} ${sapi} SAPI since the module"
		warning "was disabled by local administrator."
		return 1
	    fi
	    ;;
	34)
            warning "Not enabling the ${modname} module for PHP ${version} ${sapi} SAPI since module symlink"
	    warning "already exists in /etc/php/${version}/${sapi}/conf.d with different content."
	    return 1
	    ;;
	# fail if we get any different result
	*)
	    warning "Unable to get module state, run phpquery -v ${version} -s ${sapi} -m ${modname} manually"
	    warning "and fix the module state."
	    return 1
    esac

    if [ -d "/etc/php/${version}/$sapi/conf.d" ]; then
	if [ ! -h "${live_link}" ]; then
	    ln -s "${live_link_content}" "${live_link}"
	fi
    else
	warning "Directory /etc/php/${version}/${sapi}/conf.d doesn't exist, not enabling the module"
	return 1
    fi

    return 0
}

dismod() {
    local version=$1
    local sapi=$2
    local modname=$3
    local purge=$4

    if ! module_exists "$version" "$modname"; then
	if [ "$purge" = "no" ]; then
	    warning "Module ${modname} ini file doesn't exist under /etc/php/${version}/mods-available"
	    return 1
	fi
    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")

    local module_state=0
    phpquery -q -v "$version" -s "$sapi" -m "$modname" || module_state=$?

    case $module_state in
	# module enabled
	0)
	    ;;
	# module not enabled, but re-remove the link just in case
	1|32|33)
	    ;;
	34)
	    warning "Not disabling module ${modname} for ${sapi} SAPI.  The configuration was"
	    warning "modified by local administrator."
	    return 1
	    ;;
	# fail if we get any different result
	*)
	    warning "Unable to get module state, run phpquery -v ${version} -s ${sapi} -m ${modname} manually"
	    warning "and fix the module state."
	    return 1
    esac

    if [ -d "/etc/php/${version}/${sapi}/conf.d" ]; then
	if [ -h "$live_link" ]; then
	    rm -f "$live_link"
	fi
    fi

    return 0
}

versions=
sapis=
register=no
purge=no
while getopts pfv:s:mqr opt; do
    case $opt in
	r) register=yes;;
	v)
	    if [ "$versions" = "ALL" -o \( "$OPTARG" = "ALL" -a -n "$versions" \) ]; then
		warning "You cannot specify ALL and individual versions"
		usage
	    fi
	    versions="${versions}${versions:+ }$OPTARG"
	    ;;
	s)
	    if [ "$sapis" = "ALL" -o \( "$OPTARG" = "ALL" -a -n "$sapis" \) ]; then
		warning "You cannot specify ALL and individual sapis"
		usage
	    fi
	    sapis="${sapis}${sapis:+ }$OPTARG"
	    ;;
	m) MAINT_MODE=yes;;
	p) purge=yes;;
	q) QUIET=yes;;
	\?) usage;;
    esac
done
shift $(expr $OPTIND - 1)
mods=""
for mod in $@; do
    mods="${mods}${mods:+ }${mod%%/*}"
done

# If -v or -s was not specified run on every version and every SAPI
[ -z "$versions" ] && versions=ALL
[ -z "$sapis"    ] && sapis=ALL

[ -z "$mods" ] && usage

case "${SCRIPT_NAME}" in
    phpenmod)
	enmods "$versions" "$sapis" "$mods" "$register"
	;;
    phpdismod)
	dismods "$versions" "$sapis" "$mods" "$register" "$purge"
	;;
    *)
	usage
	;;
esac
exit 0