#!/bin/bash
#
# vhost-stack
# https://git.stack-source.com/msb/vhost-stack
# MIT License Copyright (c) 2021 Matthew Saunders Brown

# load include file
source $(dirname $0)/vhost.sh

# vhost-enable.sh macro_name vhost [subdomain|alias]
# vhost-enable.sh VHostHTTPS example.com
# vhost-enable.sh VHostSubdomainHTTPS example.com staging
# vhost-enable.sh VHostAliasHTTPS example.com existingsite
# vhost-enable.sh VMailHTTPS mail.example.com
# vhost-enable.sh RedirectHTTPS example.com https://my.newsite.com/path/page.html
#
# mod_macro config will look like:
# Use VHostHTTP $vhost $username
# Use VHostHTTPS $vhost $username
# Use VHostHTTPSVarnish $vhost $username
# Use VHostSubdomainHTTP $vhost $username $subdomain
# Use VHostSubdomainHTTPS $vhost $username $subdomain
# Use VHostSubdomainHTTPSVarnish $vhost $username $subdomain
# Use VHostAliasHTTP $vhost $username $alias
# Use VHostAliasHTTPS $vhost $username $alias
# Use VHostAliasHTTPSVarnish $vhost $username $alias
# Use VMailHTTPS $vhost
# Use RedirectHTTP $vhost $redirect
# Use RedirectHTTPS $vhost $redirect
#
# $username is autodetected from vhost dir ownership

macro_array=($(grep Macro /etc/apache2/mods-available/macro.conf |cut -d ' ' -f 2|grep -v Macro))
macro_vhost_line="Use"

# check for and set mode
if [ -n "$1" ]; then
  macro_name=$1
  if [[ " ${macro_array[@]} " =~ " ${macro_name} " ]]; then
    macro_vhost_line="$macro_vhost_line $macro_name"
  else
    echo "invalid macro name"
    exit 1
  fi
else
  echo "macro name not set"
  exit 1
fi

# check for and set vhost
if [ -n "$2" ]; then
  vhost=$2
  macro_vhost_line="$macro_vhost_line $vhost"
  vhost_conf="$vhost.conf"
else
  echo "vhost not set"
  exit 1
fi

# set username for all VHost macros
if [[ "$macro_name" == *"VHost"* ]]; then
  # check for vhost dir
  if [ -d "/srv/www/$vhost" ]; then
    # get and set $username
    username=$(stat -c '%U' /srv/www/$vhost)
    macro_vhost_line="$macro_vhost_line $username"
  else
    echo "vhost dir for $vhost does not exist"
    exit 1
  fi
  # check for and set Subdomain
  if [[ "$macro_name" == *"Subdomain"* ]]; then
    if [ -n "$3" ]; then
      subdomain=$3
      # make sure Subdomain isn't already installed
      if [ -d "/srv/www/$subdomain.$vhost" ]; then
        echo "$subdomain.$vhost is already installed as it's own vhost"
        exit 1
      fi
      if [ ! -d "/srv/www/$vhost/$subdomain" ]; then
        echo "subdomain directory (/srv/www/$vhost/$subdomain) does not exist"
        exit 1
      fi
      macro_vhost_line="$macro_vhost_line $subdomain"
      vhost_conf="$subdomain.$vhost_conf"
    else
      echo "subdomain not set"
      exit 1
    fi
  fi
  # check for and set Alias
  if [[ "$macro_name" == *"Alias"* ]]; then
    if [ -n "$3" ]; then
      # make sure Alias domain isn't already installed as it's own vhost
      if [ -d "/srv/www/$vhost" ]; then
        echo "$alias is already installed as it's own vhost"
        exit 1
      else
        alias=$3
        macro_vhost_line="$macro_vhost_line $alias"
      fi
    else
      echo "alias not set"
      exit 1
    fi
  fi
  # check for varnish config
  if [[ "$macro_name" == *"Varnish"* ]]; then
    varnish_host=$vhost
    if [[ "$macro_name" == *"Subdomain"* ]]; then
      varnish_host="$subdomain.$varnish_host"
    fi
    if [ ! -f "/etc/varnish/sites.d/$varnish_host.vcl" ]; then
      echo "$varnish_config_file Varnish config file does not exist"
      exit 1
    fi
  fi
fi

# check for and set redirect
if [[ "$macro_name" == *"Redirect"* ]]; then
  if [ -n "$3" ]; then
    redirect=$3
    # make sure Redirect domain isn't already installed as it's own vhost
    if [ -d "/srv/www/$vhost" ]; then
      echo "$vhost is already installed as it's own vhost"
      exit 1
    else
      macro_vhost_line="$macro_vhost_line $redirect"
    fi
  else
    echo "redirect not set"
    exit 1
  fi
fi

# if https check for le cert
if [[ "$macro_name" == *"HTTPS"* ]]; then
  cert_host=$vhost
  if [[ "$macro_name" == *"Subdomain"* ]]; then
    cert_host="$subdomain.$cert_host"
  fi
  if [ ! -f "/etc/ssl/letsencrypt/$cert_host.pem" ]; then
    echo "cert file for $cert_host does not exist"
    exit 1
  fi
fi

# create / edit apache conf
echo "$macro_vhost_line" > /etc/apache2/sites-available/$vhost_conf

# enable apache conf
if [[ ! -h /etc/apache2/sites-enabled/$vhost_conf ]]; then
  a2ensite --quiet $vhost_conf
fi

# restart apache
if systemctl --quiet is-active apache2 ; then
  if /usr/sbin/apachectl -t >/dev/null 2>&1 ; then
    systemctl --quiet reload  apache2
  else
    echo "apache config test failed, not doing restart"
    exit 2
  fi
fi