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#!/bin/sh /etc/rc.common
# Copyright (C) 2015 OpenWrt.org

START=80

USE_PROCD=1

G_OPTS="daemon off;"

NGINX_UTIL="/usr/bin/nginx-util"
UCI_CONF_TEMPLATE="/etc/nginx/uci.conf.template"
LATEST_UCI_CONF_VERSION="1.2"

[ -f "${NGINX_UTIL}" ] && eval $("${NGINX_UTIL}" get_env)

CONF=""

nginx_check_luci_template() {
	UCI_CONF_VERSION="$(sed -nr 's/# UCI_CONF_VERSION=(.*)/\1/p' $UCI_CONF_TEMPLATE)"

	# No need to migrate already latest version
	if [ "$UCI_CONF_VERSION" = "$LATEST_UCI_CONF_VERSION" ]; then
		return
	fi

	# Fix wrong entry for the module.d include
	if [ "$UCI_CONF_VERSION" = "1.1" ]; then
		# Remove any entry
		sed -i '/^include module\.d\/\*\.module;/d' $UCI_CONF_TEMPLATE
		# Put the include before events {}
		sed -i 's/events {/include module.d\/*.module;\n\nevents {/' $UCI_CONF_TEMPLATE
	fi

	if [ "$UCI_CONF_VERSION" != "$LATEST_UCI_CONF_VERSION" ]; then
		sed -i "s/# UCI_CONF_VERSION=.*/# UCI_CONF_VERSION=$LATEST_UCI_CONF_VERSION/" $UCI_CONF_TEMPLATE
	fi

	if [ -z "$UCI_CONF_VERSION" ]; then
		# Handle funny case with template with the include module but no version
		if ! grep -q -e '^include module\.d/\*\.module;$' $UCI_CONF_TEMPLATE; then
			sed -i 's/events {/include module.d\/*.module;\n\nevents {/' $UCI_CONF_TEMPLATE
		fi
		echo "" >> $UCI_CONF_TEMPLATE
		echo "# UCI_CONF_VERSION=1.2"  >> $UCI_CONF_TEMPLATE
	fi
}

nginx_init() {
	[ -z "${CONF}" ] || return # already called.

	[ -d /var/log/nginx ] || mkdir -p /var/log/nginx
	[ -d /var/lib/nginx ] || mkdir -p /var/lib/nginx

	rm -f "$(readlink "${UCI_CONF}")"
	${NGINX_UTIL} init_lan

	if [ -f $UCI_CONF_TEMPLATE ]; then
		nginx_check_luci_template
	fi

	if [ -e "${UCI_CONF}" ]
	then CONF="${UCI_CONF}"
	else CONF="${NGINX_CONF}"
	fi

	local message
	message="$(/usr/sbin/nginx -t -c "${CONF}" -g "${G_OPTS}" 2>&1)" ||
	{
		echo -e "${message}" | logger -t "nginx_init" -p "daemon.err"
		logger -s -t "nginx_init" -p "daemon.err" "NOT using conf file!"
		echo "show config to be used by: nginx -T -c '${CONF}'" >&2
		exit 1
	}

	logger -t "nginx_init" -p "daemon.info" "using ${CONF} (the test is ok)"
}

add_mdns() {
	local cfg="$1"
	local port enabled service

	config_get enabled "$cfg" enabled
	config_get port "$cfg" listen

	port=$(echo "$port" | head -n1 | awk '{print $1;}')


	if [ "$enabled" != "0" ] && [ "$enabled" != "false" ] && [ -n "$port" ]; then
		case "$port" in
			"80")
				service="http"
				;;
			"8080")
				service="http-alt"
				;;
			"443")
				service="https"
				;;
			"8443")
				service="pcsync-https"
				;;
			*)
				service="custom-http-$port"
				;;
		esac

		procd_add_mdns_service "$service" "tcp" "$port" "daemon=nginx"
	fi
}

configure_mdns() {
	local mdns="$(uci -q get nginx.global.mdns)"

	if [ "$mdns" = "1" ] || [ "$mdns" = "true" ]; then
		procd_open_data
		json_add_object "mdns"

		config_load nginx
		config_foreach add_mdns server

		json_close_object
		procd_close_data
	fi
}

start_service() {
	nginx_init

	procd_open_instance
	procd_set_param command /usr/sbin/nginx -c "${CONF}" -g "${G_OPTS}"
	procd_set_param stdout 1
	procd_set_param stderr 1
	procd_set_param file "${CONF}" "${CONF_DIR}*.crt" "${CONF_DIR}*.key" \
		"${CONF_DIR}*.conf" "${CONF_DIR}*.locations"
	procd_set_param respawn

	configure_mdns

	procd_close_instance
}


reload_service() {
	nginx_init

	if [ "$(cat "/proc/$(cat "/var/run/nginx.pid")/cmdline")" = \
	     "nginx: master process /usr/sbin/nginx -c ${CONF} -g ${G_OPTS}" ]
	then procd_send_signal nginx
	else restart
	fi
}


service_triggers() {
	procd_add_raw_trigger acme.renew 5000 /etc/init.d/nginx reload
}


extra_command "relog" "Reopen log files (without reloading)"
relog() {
	[ -d /var/log/nginx ] || mkdir -p /var/log/nginx
	procd_send_signal nginx '*' USR1
}