#! /bin/sh
### BEGIN INIT INFO
# Provides:          mattermost
# Required-Start:    $network $syslog
# Required-Stop:     $network $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Mattermost Group Chat
# Description:       Mattermost: An open-source Slack
### END INIT INFO

PATH=/sbin:/usr/sbin:/bin:/usr/bin
DESC="Mattermost"
NAME=mattermost
MATTERMOST_ROOT=/opt/mattermost
MATTERMOST_GROUP=mattermost
MATTERMOST_USER=mattermost
DAEMON="$MATTERMOST_ROOT/bin/platform"
PIDFILE=/var/run/$NAME.pid
SCRIPTNAME=/etc/init.d/$NAME

. /lib/lsb/init-functions

do_start() {
    # Return
    #   0 if daemon has been started
    #   1 if daemon was already running
    #   2 if daemon could not be started
    start-stop-daemon --start --quiet \
        --chuid $MATTERMOST_USER:$MATTERMOST_GROUP --chdir $MATTERMOST_ROOT --background \
        --pidfile $PIDFILE --exec $DAEMON --test > /dev/null \
        || return 1
    start-stop-daemon --start --quiet \
        --chuid $MATTERMOST_USER:$MATTERMOST_GROUP --chdir $MATTERMOST_ROOT --background \
        --make-pidfile --pidfile $PIDFILE --exec $DAEMON \
        || return 2
}

#
# Function that stops the daemon/service
#
do_stop() {
    # Return
    #   0 if daemon has been stopped
    #   1 if daemon was already stopped
    #   2 if daemon could not be stopped
    #   other if a failure occurred
    start-stop-daemon --stop --quiet --retry=TERM/30/KILL/5 \
        --pidfile $PIDFILE --exec $DAEMON
    RETVAL="$?"
    [ "$RETVAL" = 2 ] && return 2
    # Wait for children to finish too if this is a daemon that forks
    # and if the daemon is only ever run from this initscript.
    # If the above conditions are not satisfied then add some other code
    # that waits for the process to drop all resources that could be
    # needed by services started subsequently.  A last resort is to
    # sleep for some time.
    start-stop-daemon --stop --quiet --oknodo --retry=0/30/KILL/5 \
        --exec $DAEMON
    [ "$?" = 2 ] && return 2
    # Many daemons don't delete their pidfiles when they exit.
    rm -f $PIDFILE
    return "$RETVAL"
}

case "$1" in
start)
    [ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC" "$NAME"
    do_start
    case "$?" in
            0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
            2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
    esac
    ;;
stop)
    [ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME"
    do_stop
    case "$?" in
            0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
            2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
    esac
    ;;
status)
    status_of_proc "$DAEMON" "$NAME" && exit 0 || exit $?
    ;;
restart|force-reload)
    #
    # If the "reload" option is implemented then remove the
    # 'force-reload' alias
    #
    log_daemon_msg "Restarting $DESC" "$NAME"
    do_stop
    case "$?" in
    0|1)
            do_start
            case "$?" in
                    0) log_end_msg 0 ;;
                    1) log_end_msg 1 ;; # Old process is still running
                    *) log_end_msg 1 ;; # Failed to start
            esac
            ;;
    *)
            # Failed to stop
            log_end_msg 1
            ;;
    esac
    ;;
*)
    echo "Usage: $SCRIPTNAME {start|stop|status|restart|force-reload}" >&2
    exit 3
    ;;
esac

exit 0