#!/bin/sh

# PROVIDE: caddy
# REQUIRE: LOGIN DAEMON NETWORKING
# KEYWORD: shutdown

# To enable caddy:
#
# - Edit %%ETCDIR%%/Caddyfile
#   See https://caddyserver.com/docs/
# - Run 'service caddy enable'
#
# Note while Caddy currently defaults to running as root:wheel, it is strongly
# recommended to run the server as an unprivileged user, such as www:www.
#
# - Use security/portacl-rc to enable privileged port binding:
#
#   # pkg install security/portacl-rc
#   # sysrc portacl_users+=www
#   # sysrc portacl_user_www_tcp="http https"
#   # sysrc portacl_user_www_udp="https"
#   # service portacl enable
#   # service portacl start
#
# - Configure caddy to run as www:www
#
#   # sysrc caddy_user=www caddy_group=www
#
# - Note if Caddy has been started as root previously, files in
#   /var/log/caddy, /var/db/caddy, and /var/run/caddy may require their ownership
#   changing manually.

# Optional settings:
# caddy_command (string):     Full path to the caddy binary
# caddy_config (string):      Full path to caddy config file
#                             (%%ETCDIR%%/Caddyfile)
# caddy_adapter (string):     Config adapter type (caddyfile)
# caddy_admin (string):       Default administration endpoint
#                             (unix//var/run/caddy/caddy.sock)
# caddy_directory (string):   Root for caddy storage (ACME certs, etc.)
#                             (/var/db/caddy)
# caddy_extra_flags (string): Extra flags passed to caddy start
# caddy_logdir (string):      Where caddy logs are stored
#                             (/var/log/caddy)
# caddy_logfile (string):     Location of process log (${caddy_logdir}/caddy.log)
#                             This is for startup/shutdown/error messages.
#                             To create an access log, see:
#                             https://caddyserver.com/docs/caddyfile/directives/log
# caddy_user (user):          User to run caddy (root)
# caddy_group (group):        Group to run caddy (wheel)
#
# This script will honor XDG_CONFIG_HOME/XDG_DATA_HOME. Caddy will create a
# .../caddy subdir in each of those. By default, they are subdirs of /var/db/caddy.
# See https://caddyserver.com/docs/conventions#data-directory

. /etc/rc.subr

name=caddy
rcvar=caddy_enable
desc="Powerful, enterprise-ready, open source web server with automatic HTTPS written in Go"

load_rc_config $name

# Defaults
: ${caddy_enable:=NO}
: ${caddy_adapter:=caddyfile}
: ${caddy_config:="%%ETCDIR%%/Caddyfile"}
: ${caddy_admin:="unix//var/run/${name}/${name}.sock"}
: ${caddy_command:="%%PREFIX%%/bin/${name}"}
: ${caddy_directory:=/var/db/caddy}
: ${caddy_extra_flags:=""}
: ${caddy_logdir:="/var/log/${name}"}
: ${caddy_logfile:="${caddy_logdir}/${name}.log"}
: ${caddy_user:="root"}
: ${caddy_group:="wheel"}

# Config and base directories
: ${XDG_CONFIG_HOME:="${caddy_directory}/config"}
: ${XDG_DATA_HOME:="${caddy_directory}/data"}
export XDG_CONFIG_HOME XDG_DATA_HOME

# Default admin interface
export CADDY_ADMIN="${caddy_admin}"

command="${caddy_command}"
pidfile="/var/run/${name}/${name}.pid"

required_files="${caddy_config} ${caddy_command}"

start_precmd="caddy_precmd"
start_cmd="caddy_start"
stop_precmd="caddy_prestop"

# JSON is the native format, so there is no "adapter" for it
if [ "${caddy_adapter}" = "json" ]; then
    caddy_flags="--config ${caddy_config}"
else
    caddy_flags="--config ${caddy_config} --adapter ${caddy_adapter}"
fi

# Extra Commands
extra_commands="configtest reload reloadssl"
configtest_cmd="caddy_execute validate ${caddy_flags}"
reload_cmd="caddy_execute reload ${caddy_flags}"
reloadssl_cmd="caddy_execute reload --force ${caddy_flags}"

caddy_execute()
{
    /usr/bin/su -m "${caddy_user}" -c "${caddy_command} $*"
}

caddy_precmd()
{
    # Create required directories and set permissions
    /usr/bin/install -d -m 755 -o "${caddy_user}" -g "${caddy_group}" ${caddy_directory}
    /usr/bin/install -d -m 700 -o "${caddy_user}" -g "${caddy_group}" ${caddy_directory}/config
    /usr/bin/install -d -m 700 -o "${caddy_user}" -g "${caddy_group}" ${caddy_directory}/data
    /usr/bin/install -d -m 755 -o "${caddy_user}" -g "${caddy_group}" ${caddy_logdir}
    /usr/bin/install -d -m 700 -o "${caddy_user}" -g "${caddy_group}" /var/run/caddy
    if [ -e ${caddy_logfile} ]; then
        /bin/chmod 644 ${caddy_logfile}
        /usr/sbin/chown "${caddy_user}:${caddy_group}" ${caddy_logfile}
    else
        /usr/bin/install -m 644 -o "${caddy_user}" -g "${caddy_group}" /dev/null ${caddy_logfile}
    fi
}

caddy_start()
{
    echo -n "Starting caddy... "
    /usr/bin/su -m ${caddy_user} -c "${caddy_command} start ${caddy_flags} \
        ${caddy_extra_flags} --pidfile ${pidfile}" >> ${caddy_logfile} 2>&1
    if [ $? -eq 0 ] && ps -ax -o pid | grep -q "$(cat ${pidfile})"; then
        echo "done"
        echo "Log: ${caddy_logfile}"
    else
        echo "Error: Caddy failed to start"
        echo "Check the caddy log: ${caddy_logfile}"
    fi
}

caddy_prestop()
{
    local result

    echo -n "Stopping caddy... "

    result="$(caddy_execute stop ${caddy_flags} 2>&1)"
    if [ ${?} -eq 0 ]; then
        echo "done"
        exit 0
    else
        if echo "${result}" | grep -q -e "connection refused" \
            -e "connect: no such file or directory"; then

            echo "admin interface unavailable; using pidfile"
            return 0
        else
            echo "Error: Unable to stop caddy"
            echo "Check the caddy log: ${caddy_logfile}"
            return 1
        fi
    fi
}

run_rc_command "$1"
