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#!/sbin/openrc-run

extra_started_commands="loadconfig saveconfig"

description="NGINX Unit"
description_loadconfig="Load saved configuration"
description_saveconfig="Save configuration to file"

: ${control_socket:="unix:/run/control.unit.sock"}
: ${logfile:="/var/log/unit.log"}
: ${statedir:="/var/lib/unit"}
: ${config_file:="/etc/unit/unit.conf"}
: ${config_load_on_start:="no"}
: ${config_save_on_stop:="no"}

command="/usr/sbin/unitd"
command_args="
	--no-daemon
	--log $logfile
	--control $control_socket
	$command_args"
command_background="yes"
pidfile="/run/$RC_SVCNAME.pid"

depend() {
	need net
	use dns logger netmount
}

start_post() {
	if yesno "$config_load_on_start" && [ -f "$config_file" ]; then
		check_control_socket || return 1
		ewaitfile 5 "${control_socket#unix:}" || return 1
		loadconfig || return 1
	fi
}

stop_pre() {
	if yesno "$config_save_on_stop"; then
		saveconfig
	fi
}

saveconfig() {
	ebegin "Saving configuration to $config_file"

	check_control_socket || return 1
	checkpath -d "${config_file%/*}" || return 1

	local tmpfile=$(mktemp)
	curl -sS --unix-socket "${control_socket#unix:}" localhost > "$tmpfile" || {
		rm -f "$tmpfile"
		eend 1 "Could not retrieve configuration"
		return 1
	}
	cat "$tmpfile" > "$config_file" && rm -f "$tmpfile"
	eend $?
}

loadconfig() {
	ebegin "Loading configuration from $config_file"

	check_control_socket || return 1

	if ! [ -f "$config_file" ]; then
		eend 1 "File $config_file does not exist"
		return 1
	fi

	local resp=$(curl -sS -X PUT --data-binary "@$config_file" \
		--write-out "\nHTTP_CODE:%{http_code}\n" \
		--unix-socket "${control_socket#unix:}" localhost)

	if [ "$(echo "$resp" | sed -n 's/^HTTP_CODE:\(\d\).*/\1/p')" -ne 2 ]; then
		eend 1 "Unable to load configuration"
		echo "$resp" | sed '/^HTTP_CODE:/d' >&2
		return 1
	fi
	eend 0
}

check_control_socket() {
	case "$control_socket" in
		unix:*) return 0;;
	esac
	eerror "control_socket must be a unix socket when using saveconfig or loadconfig"
	return 1
}