#!/bin/sh /etc/rc.common

START=80
STOP=10

CFGDIR=/var/etc/radicale2
SYSCFG=$CFGDIR/config
USRCFG=$CFGDIR/users

DATADIR="/srv/radicale2/data"
LOGDIR=""
USE_PROCD=1

# we could start with empty configuration file using defaults
[ -f ${IPKG_INSTROOT}/etc/config/radicale2 ] || touch ${IPKG_INSTROOT}/etc/config/radicale2

conf_line() {
	local cfgfile="$1"
	local option="$2"
	local value="$3"

	if [ -n "$value" ]; then
		eval "echo '$2' = '$value' >>'$cfgfile'"
	fi
}

conf_getline() {
	local cfg="$1"
	local cfgfile="$2"
	local option="$3"
	local defval="$4"
	local flag="$5"
	unset value

	if [ "$flag" != "1" ]; then
		config_get value "$cfg" "$option" "$defval"
		conf_line "$cfgfile" "$option" "$value"
	else
		config_get_bool value "$cfg" "$option" "$defval"
		[ -z "$defval" ] && defval=1
		if [ "$value" -ne "$defval" ]; then
			if [ "$value" -ne 0 ]; then
				conf_line "$cfgfile" "$option" "True"
			else
				conf_line "$cfgfile" "$option" "False"
			fi
		fi
	fi
}

build_hosts_line() {
	local val="$1"

	append hostlist "$val" ", "
}

conf_section() {
	local cfg="$1"
	local cfgfile="$2"
	local hostlist=""
	local value

	echo "[$cfg]
" >>$cfgfile

	case $cfg in
	server)
		config_list_foreach "$cfg" host build_hosts_line
		conf_line "$tmpfile" hosts "$hostlist"
		conf_getline "$cfg" $tmpfile max_connections
		conf_getline "$cfg" $tmpfile max_conntent_length
		conf_getline "$cfg" $tmpfile timeout

		conf_getline "$cfg" $tmpfile ssl 0 1
		if [ "$value" -eq 1 ]; then
			conf_getline "$cfg" $tmpfile certificate
			conf_getline "$cfg" $tmpfile key
			conf_getline "$cfg" $tmpfile certificate_authority
			conf_getline "$cfg" $tmpfile protocol
			conf_getline "$cfg" $tmpfile ciphers
		fi

		conf_getline "$cfg" $tmpfile dns_lookup 1 1
		conf_getline "$cfg" $tmpfile realm
		;;
	encoding)
		conf_getline "$cfg" $tmpfile request
		conf_getline "$cfg" $tmpfile stock
		;;
	auth)
		conf_getline "$cfg" $tmpfile "type" htpasswd
		if [ "$value" = "htpasswd" ]; then
			conf_getline "$cfg" $tmpfile htpasswd_filename $CFGDIR/users
			conf_getline "$cfg" "$tmpfile" htpasswd_encryption plain
		fi

		conf_getline "$cfg" "$tmpfile" delay
		;;
	rights)
		conf_getline "$cfg" "$tmpfile" "type"
		if [ "$value" = "from_file" ]; then
			conf_getline "$cfg" "$tmpfile" "file"
		fi
		;;
	storage)
		conf_getline "$cfg" $tmpfile filesystem_folder "$DATADIR"
		DATADIR="$value"
		conf_getline "$cfg" $tmpfile filesystem_locking 1 1
		conf_getline "$cfg" $tmpfile max_sync_token_age
		conf_getline "$cfg" $tmpfile filesystem_close_lock_file 0 1
		conf_getline "$cfg" $tmpfile hook
		;;
	web)
		conf_getline "$cfg" $tmpfile "type"
		;;
	logging)
		conf_getline "$cfg" "$tmpfile" config
		conf_getline "$cfg" "$tmpfile" debug 0 1
		conf_getline "$cfg" "$tmpfile" full_environment 0 1
		conf_getline "$cfg" "$tmpfile" mask_passwords 1 1
		;;
	headers)
		config_get "$cfg" "$tmpfile" cors
		if [ -n "$cors" ]; then
			echo "Access-Control-Allow-Origin = $cors" >>$tmpfile
		fi
		;;
	esac

	echo "
" >>$cfgfile
}

add_missing_sections() {
	local cfgfile="$1"

	for section in server encoding auth rights storage web logging headers; do
		if [ "$section" = "server" ]; then
			grep -q "\[$section\]" $cfgfile || echo "
[$section]
hosts = 0.0.0.0:5232, [::]:5232

" >>$cfgfile
		elif [ "$section" = "auth" ]; then
			grep -q "\[$section\]" $cfgfile || echo "
[$section]
type = htpasswd
htpasswd_filename = $CFGDIR/users
htpasswd_encryption = plain

" >>$cfgfile
		elif [ "$section" = "storage" ]; then
			grep -q "\[$section\]" $cfgfile || echo "
[$section]
filesystem_folder = $DATADIR

" >>$cfgfile
		else
			grep -q "\[$section\]" $cfgfile || echo "
[$section]

" >>$cfgfile
		fi
	done
}

add_user() {
	local cfg="$1"
	local tmpfile="$2"
	local name password

	config_get name "$cfg" name
	config_get password "$cfg" password

	[ -n "$name" ] && echo "$name:$password" >>$tmpfile
}

build_users() {
	local tmpfile="$1"

	# temporary config file
	# radicale2 needs read access
	chmod 0640 $tmpfile

	config_foreach add_user user "$tmpfile"
}

build_config() {
	local tmpfile=$(mktemp)
	local tmpfile2=$(mktemp)

	# temporary config file
	# radicale2 need read access
	chmod 0640 $tmpfile

	config_load radicale2
	config_foreach conf_section section $tmpfile
	add_missing_sections $tmpfile

	build_users $tmpfile2

	# move tmp to final
	mkdir -m0750 -p $CFGDIR
	cat $tmpfile >$SYSCFG
	rm -f $tmpfile
	cat $tmpfile2 >$USRCFG
	rm -f $tmpfile2
}

set_permission() {
	# config file permissions (read access for group)
	chmod 0750 $CFGDIR
	chmod 0640 $SYSCFG
	chmod 0640 $USRCFG
	chgrp -R radicale2 $CFGDIR
	# data directory does not exist
	[ -d $DATADIR ] || {
		logger -p user.error -t "radicale2[----]" "Data directory '$DATADIR' does not exist. Startup failed !!!"
	}
}


interface_triggers() {
	local action="$1"
	local triggerlist trigger

	config_load radicale2
	config_get triggerlist server triggerlist

	. /lib/functions/network.sh

	if [ -n "$triggerlist" ]; then
		for trigger in $triggerlist; do
			if [ "$action" = "add_trigger" ]; then
				procd_add_interface_trigger "interface.*" "$trigger" /etc/init.d/radicale2 reload
			else
				network_is_up "$trigger" && return 0
			fi
		done
	else
		if [ "$action" = "add_trigger" ]; then
			procd_add_raw_trigger "interface.*.up" 2000 /etc/init.d/radicale2 reload
		else
			ubus call network.device status | grep -q '"up": true' && return 0
		fi
	fi
	[ "$action" = "add_trigger" ] || return 1
}

start_service() {
	local haveinterface

	if [ ! -r /etc/radicale2/config ]; then
		build_config
		set_permission
	fi

	interface_triggers "check_interface_up" || return

	procd_open_instance "radicale2"
	procd_set_param respawn
	procd_set_param stderr 1
	procd_set_param stdout 1
	if [ ! -r /etc/radicale2/config ]; then
		procd_set_param command /usr/bin/radicale2 --config="$SYSCFG"
	else
		procd_set_param command /usr/bin/radicale2 --config="/etc/radicale2/config"
	fi
	procd_set_param user radicale2
	procd_close_instance

	return 0
}

service_triggers() {
	interface_triggers "add_trigger"
	procd_add_reload_trigger "radicale2"
}