#!/bin/bash
PS4=':${LINENO} + '
#set -x
# Script to patch Drupal for use on Drupion's servers. 2014.08.06 Frederick Henderson
# Updated 2015.03.18 to allow specifying the path to run in on the command line.
# See http://drupion.com/resources/downloads/drupal for more info.
# A symptoms is that no images show on the site.
# Drupion says on that page: 
# Please note these are simply patched versions obtained by searching with
#  find . | xargs fgrep -nH FollowSymLinks 
#  and replacing all +FollowSymLinks with +SymLinksIfOwnerMatch.
# I used the following to fix all links:
#  find . -exec sed -i 's@FollowSymLinks@SymLinksIfOwnerMatch@g' "{}" \; -print

yes=0

function usage()
{
 echo "Usage ${0##*/}  -y -h <path>"
 echo "Where:"
 echo "-y answers yes to questions. For use in scripts."
 echo "-h displays this help info."
 echo "<path> of the drupal root to operate on."
 echo ""
}

while getopts yh option
do
  case "${option}" in
    h)
      usage
      exit 2
    ;;
    y)
      yes=1
    ;;
    \?)
      echo "Invalid option: -$OPTARG" >&2
      exit 1
    ;;
    :)
      echo "Option -$OPTARG requires an argument." >&2
      exit 1
    ;;
  esac
done
# get rid of our flag options and arguments
shift $((OPTIND-1))

# Save path if given on command lines
drupalrootpath=$1

red='\e[1;31m'
NC='\e[0m' # No Color
pwd=$(pwd)


switchdirctoryifgiven(){
  if [ ! -z $drupalrootpath ] ; then
    cd $drupalrootpath
  else
  directoryrunfrom=$(cd -P -- "$(dirname -- "$0")" && pwd -P)
    drupalrootpath=$directoryrunfrom
    cd $drupalrootpath
  fi
}

pause(){
   read -p "$*"
}

informuser(){
echo "This script should be run from a Drupal webroot, but the"
echo "directory to run from can be specified on the command line."
echo "To see help use the -h switch."
echo "This script will be run in $drupalrootpath"
echo "This script will patch this Drupal installation to use"
echo " +SymLinksIfOwnerMatch instead +FollowSymLinks"
echo "This is need on servers running Virtualmin."
echo " "
}
areweinadrupalwebroot(){
if [ ! -f index.php ] ; then
grep -q [Dd]rupal index.php
if [ $? -ne 0 ]; then
echo -e "Exiting, I did not find the ${red}Drupal index.php${NC} file."
informuser
echo "Nothing more to do, exiting. Bye!"
exit
fi
fi
}
notwhatyouwanted(){
echo -e "If this is not what you want hit ${red}Ctrl + C${NC} to abort this script or press any key to continue."
pause
echo " "
}

patchdrupionyesno(){
  echo -e -n "Patch this Drupal installation for use on Drupion by replacing all ${red}+FollowSymLinks${NC} with ${red}+SymLinksIfOwnerMatch${NC} ? [y/N] "
  read -r response
response=${response,,}    # tolower
}
patchdrupion(){
if [[ $response =~ ^(yes|y)$ || $yes = 1 ]]; then
find . -exec sed -i 's@FollowSymLinks@SymLinksIfOwnerMatch@g' "{}" \; -print
else
exit
fi
}
finished(){
  echo "All done patching this Drupal installation"
}

### MAIN PROGRAMM ###

if [ $yes = 1 ]; then 
switchdirctoryifgiven
areweinadrupalwebroot
patchdrupion
else
switchdirctoryifgiven
areweinadrupalwebroot
informuser
notwhatyouwanted
patchdrupionyesno
patchdrupion
finished
fi