#!/bin/sh
#
# php-helper - 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.

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

remove_state() {
    local action=$1
    local version=$2
    local sapi=$3
    local modname=$4

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

    return 0
}

mod_registry() {
    local action=$1
    local version=$2
    local modname=$3
    local registry_dir="$(get_registry_dir "$version")"
    local registry_file="${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 version=$2
    local sapi=$3
    local modname=$4

    local state_dir="$(get_state_dir "$version" $sapi)"
    local admin_state="${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 "$version" "$sapi" "$modname"
    remove_state enabled "$version" "$sapi" "$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 version=$1
    local sapi=$2
    local modname=$3

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

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

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

    return $module_ret
}

get_live_link() {
    local version=$1
    local sapi=$2
    local modname=$3
    local priority=$4
    echo "/etc/php/${version}/${sapi}/conf.d/${priority}-${modname}.ini"
}

get_live_link_content() {
    local version=$1
    local sapi=$2
    local modname=$3
    local priority=$4
    echo "/etc/php/${version}/mods-available/${modname}.ini"
}

module_exists() {
    local version=$1
    local modname=$2
    local source_ini="/etc/php/${version}/mods-available/${modname}.ini"

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

get_state_dir() {
    local version=$1
    local sapi=$2
    echo "/var/lib/php/modules/${version}/${sapi}"
    return 0
}

get_registry_dir() {
    local version=$1
    echo "/var/lib/php/modules/${version}/registry"
    return 0
}

get_version_dir() {
    echo "/usr/lib/php"
    return 0
}

get_sapi_dir() {
    local version=$1
    echo "/usr/lib/php/${version}/sapi"
    return 0
}

list_parts() {
    local dir=$1
    local regex=${2:-}

    if [ -d "$dir" ]; then
	find "$dir" -mindepth 1 -maxdepth 1 \! \( -name '*.dpkg-old' -name '*.dpkg-new' -name '*.dpkg-dist' -name '*~' -name '*.bak' -name '*.ucf-old' -name '*.ucf-new' -name '*.ucf-dist' -name '*%' \) -printf '%f\n'
	return $?
    else
	return 1
    fi    
}

list_parts_regex() {
    local dir=$1
    local regex=$2
    if [ -d "$dir" ]; then
	find "$dir" -mindepth 1 -maxdepth 1 -regex "$regex" -printf '%f\n'
	return $?
    else
	return 1
    fi    
}