#!/usr/bin/env bash

script_name="$(basename $(realpath $0))"
working_dir="$(dirname $(realpath $0))"

conf_file="${working_dir}/conf/${script_name%%.*}.conf"

LOCK_DIR="/tmp/$(basename $0).$$.LOCK"
log_file="${LOCK_DIR}/${script_name%%.*}.log"

backup_date="$(date +%Y-%m-%d-%H%M)"


# ----------
# Base Function(s)
# ----------

clean_up() {

   # Perform program exit housekeeping
   rm -rf "$LOCK_DIR"
   blank_line
   exit $1
}

echononl(){
   if $terminal ; then
      echo X\\c > /tmp/shprompt$$
      if [ `wc -c /tmp/shprompt$$ | awk '{print $1}'` -eq 1 ]; then
         echo -e -n "   $*\\c" 1>&2
      else
         echo -e -n "   $*" 1>&2
      fi
      rm /tmp/shprompt$$
   fi
}
fatal(){
   echo ""
   if $terminal ; then
      echo -e "   [ \033[31m\033[1mFatal\033[m ] $*"
   else
      echo -e "   [ Fatal ] $*"
   fi
   echo ""
   if $terminal ; then
      echo -e "             \033[1mScript terminated\033[m.."
   else
      echo -e "             Script terminated.."
   fi
   echo ""
   rm -rf $LOCK_DIR
   exit 1
}
error (){
   echo ""
   if $terminal ; then
      echo -e "   [ \033[31m\033[1mError\033[m ] $*"
   else
      echo "   [ Error ] $*"
   fi
   echo ""
}

warn (){
   echo ""
   if $terminal ; then
      echo -e "   [ \033[33m\033[1mWarning\033[m ] $*"
   else
      echo "   [ Warning ] $*"
   fi
   echo ""
}

info (){
   if $terminal ; then
      echo ""
      if $terminal ; then
         echo -e "   [ \033[32m\033[1mInfo\033[m ]  $*"
      else
         echo "   [ Info ]  $*"
      fi
      echo ""
   fi
}


echo_ok() {
   if $terminal ; then
      echo -e "\033[85G[ \033[32mok\033[m ]"
   fi
}
echo_failed(){
   if $terminal ; then
      echo -e "\033[85G[ \033[1;31mfailed\033[m ]"
   fi
}
echo_skipped() {
   if $terminal ; then
      echo -e "\033[85G[ \033[33m\033[1mskipped\033[m ]"
   fi
}
echo_wait(){
   if $terminal ; then
      echo -en "\033[85G[ \033[5m\033[1m..\033[m ]"
   fi
}

trim() {
    local var="$*"
    var="${var#"${var%%[![:space:]]*}"}"   # remove leading whitespace characters
    var="${var%"${var##*[![:space:]]}"}"   # remove trailing whitespace characters
    echo -n "$var"
}

blank_line() {
   if $terminal ; then
      echo ""
   fi
}

detect_os () {

   if $(which lsb_release > /dev/null 2>&1) ; then

      DIST="$(lsb_release -i | awk '{print tolower($3)}')"
      DIST_VERSION="$(lsb_release -r | awk '{print tolower($2)}')"
      DIST_CODENAME="$(lsb_release -c | awk '{print tolower($2)}')"

      if [[ "$DIST" = "debian" ]]; then
         if $(echo "$DIST_VERSION" | grep -q '\.') ; then
            DIST_VERSION=$(echo "$DIST_VERSION" | cut --delimiter='.' -f1)
         fi
      fi

   elif [[ -e "/etc/os-release" ]]; then

      . /etc/os-release

      DIST=$ID
      DIST_VERSION=${VERSION_ID}

   fi

   # remove whitespace from DIST and DIST_VERSION
   DIST="${DIST// /}"
   DIST_VERSION="${DIST_VERSION// /}"

}


# ----------
# - Jobhandling
# ----------

# - Run 'clean_up' for signals SIGHUP SIGINT SIGTERM
# -
trap clean_up SIGHUP SIGINT SIGTERM

# - Create lock directory '$LOCK_DIR"
#
mkdir "$LOCK_DIR"


# ----------
# - Some checks ..
# ----------

# - Running in a terminal?
# -
if [[ -t 1 ]] ; then
   terminal=true
else
   fatal "Script must run in a terminal."
fi


# ==========
# - Begin Main Script
# ==========

# ----------
# - Headline
# ----------

if $terminal ; then
   echo ""
   echo -e "\033[1m----------\033[m"
   echo -e "\033[32m\033[1mRunning script \033[m\033[1m$script_name\033[32m .. \033[m"
   echo -e "\033[1m----------\033[m"
fi


# ----------
#  Read Configurations from $conf_file
# ----------

# - Give your default values here
# -
DEFAULT_VERSIONS="5.4 5.6 7.0 7.1 7.2 7.3 7.4 8.0"
DEFAULT_HTTPD_USER=www-data
DEFAULT_HTTPD_GROUP=www-data

blank_line
echononl "Loading configuration settings from $(basename ${conf_file}).."
if [[ -f "$conf_file" ]]; then
   source "$conf_file" > $log_file 2>&1
   if [[ $? -eq 0 ]]; then
      echo_ok
   else
      echo_failed
      fatal "$(cat $tmp_log_file)"
   fi
else
   echo_skipped
   warn "No Configuration File found. Loading defaults.."
fi

[[ -n "$VERSIONS" ]] || VERSIONS="$DEFAULT_VERSIONS"
[[ -n "$HTTPD_USER" ]] && DEFAULT_HTTPD_USER="$HTTPD_USER"
[[ -n "$HTTPD_GROUP" ]] && DEFAULT_HTTPD_GROUP="$HTTPD_GROUP"

if [[ -z "$HTTPD_USER" ]] || [[ -z "$HTTPD_GROUP" ]] ; then

   ## - Determin httpd binary
   ## -
   _httpd_binary="`which httpd`"
   if [ -z "$_httpd_binary" ]; then
      _httpd_binary="$(ps -axu | grep httpd |  grep -e "^root" | grep -v grep | awk '{print$11}')"
      if [ -z "$_httpd_binary" ]; then
         if [ -x "/usr/local/apache2/bin/httpd" ]; then
            _httpd_binary="/usr/local/apache2/bin/httpd"
         fi
      fi
   fi

   if [ -x "$_httpd_binary" ];then
      ## - Determin websever user
      ## -
      _pass_web_user=false
      web_user="`$_httpd_binary -t -D DUMP_RUN_CFG | grep -i -e "^User" | awk '{print$2}' | cut -d\"=\" -f2 | tr -d '"'`"
      web_group="`$_httpd_binary -t -D DUMP_RUN_CFG | grep -i -e "^Group" | awk '{print$2}' | cut -d\"=\" -f2 | tr -d '"'`"
      if [[ -n "$web_user" ]] ; then 
         DEFAULT_HTTPD_USER=$web_user
      fi
      if [[ -n "$web_group" ]]; then
         DEFAULT_HTTPD_GROUP=$web_group
      fi
   fi
fi


echo ""
echo ""
echo -e "\033[32m--\033[m"
echo ""
echo "Insert User/Group for PHP FPM daemon."
echo ""
echo ""

HTTPD_USER=
while [ "X$HTTPD_USER" = "X" ]
do
   echononl "PHP FPM user [${DEFAULT_HTTPD_USER}]: "
   read HTTPD_USER
   if [ "X$HTTPD_USER" = "X" ]; then
      HTTPD_USER=$DEFAULT_HTTPD_USER
   fi
done

if [ -z "$_HTTPD_GROUP" ]; then
   if [ "$HTTPD_USER" = "nobody" ]; then
      DEFAULT_HTTPD_GROUP="nogroup"
   else
      DEFAULT_HTTPD_GROUP=$HTTPD_USER
   fi
fi
HTTPD_GROUP=
while [ "X$HTTPD_GROUP" = "X" ]
do
   echononl "PHP FPM group [$DEFAULT_HTTPD_GROUP]: "
   read HTTPD_GROUP
   if [ "X$HTTPD_GROUP" = "X" ]; then
      HTTPD_GROUP=$DEFAULT_HTTPD_GROUP
   fi
done

blank_line
blank_line
echo -e "\033[m--\033[m"
echo -e "\033[32mStart Script with the following Parameters \033[m"
echo -e "\033[m--\033[m"
echo ""
echo "   PHP FPM User.....................: $HTTPD_USER"
echo "   PHP FPM GROUP....................: $HTTPD_GROUP"
echo ""
echo "   PHP versions to check............: $VERSIONS"

blank_line
echononl "Continue with this parameters? [\033[1myes/no\033[m]: "
read OK
while [[ "${OK,,}" != "yes" ]] && [[ "${OK,,}" != "no" ]] ; do
   echononl "\033[33mWrong entry!\033[m [\033[1myes/no\033[m]: "
   read OK
done
[[ "${OK,,}" = "yes" ]] || fatal "Canceled by user input."
blank_line


# log file location
#
for _version in $VERSIONS ; do 
   if [[ ! -d "$(realpath "/usr/local/php-${_version}")" ]]; then

      if $terminal ; then
         echo ""
         echo -e "\033[1m----------\033[m"
         echo -e "\033[33mNo PHP version $_version present\033[m"
         echo -e "\033[1m----------\033[m"
      fi

      # delete PHP FPM log directories from old non-existent installations
      #
      if [[ -d "/var/log/php-${_version}-fpm" ]] ; then

         echononl "Remove directory /var/log/php-${_version}-fpm .."
         rm -rf "/var/log/php-${_version}-fpm" > "$log_file" 2>&1
         if [[ $? -ne 0 ]]; then
            echo_failed
            error "$(cat "$log_file")"

            echononl "continue anyway [yes/no]: "
            read OK
            OK="$(echo "$OK" | tr '[:upper:]' '[:lower:]')"
            while [[ "$OK" != "yes" ]] && [[  "$OK" != "no" ]] ; do
               echononl "Wrong entry! - repeat [yes/no]: "
               read OK
            done
            [[ $OK = "yes" ]] || fatal "Stopped by user"
         else
            echo_ok
         fi
      fi

      if [[ -f "/var/log/apache2/php_errors.log" ]]; then

         echononl "Remove old log-files '/var/log/apache2/php_errors.log*'.."
         rm -f "/var/log/apache2/php_errors.log*" "$log_file" 2>&1

         if [[ $? -ne 0 ]]; then
            echo_failed
            error "$(cat "$log_file")"

            echononl "continue anyway [yes/no]: "
            read OK
            OK="$(echo "$OK" | tr '[:upper:]' '[:lower:]')"
            while [[ "$OK" != "yes" ]] && [[  "$OK" != "no" ]] ; do
               echononl "Wrong entry! - repeat [yes/no]: "
               read OK
            done
            [[ $OK = "yes" ]] || fatal "Stopped by user"
         else
            echo_ok
         fi
      fi

      # delete logrotation definitions from old non-existent installations
      #
      if [[ -f "/etc/logrotate.d/php-${_version}-fpm" ]] ; then

         echononl "Remove logrotition definition 'php-${_version}-fpm'.."
         rm "/etc/logrotate.d/php-${_version}-fpm" > "$log_file" 2>&1

         if [[ $? -ne 0 ]]; then
            echo_failed
            error "$(cat "$log_file")"

            echononl "continue anyway [yes/no]: "
            read OK
            OK="$(echo "$OK" | tr '[:upper:]' '[:lower:]')"
            while [[ "$OK" != "yes" ]] && [[  "$OK" != "no" ]] ; do
               echononl "Wrong entry! - repeat [yes/no]: "
               read OK
            done
            [[ $OK = "yes" ]] || fatal "Stopped by user"
         else
            echo_ok
         fi
      fi

      continue
   fi

   if $terminal ; then
      echo ""
      echo -e "\033[1m----------\033[m"
      echo -e "\033[32mFound installed PHP version $_version \033[m"
      echo -e "\033[1m----------\033[m"
   fi

   echononl "Create new log-file '/var/log/php-${_version}-fpm/php_errors.log'.."
   touch "/var/log/php-${_version}-fpm/php_errors.log" > "$log_file" 2>&1
   if [[ $? -ne 0 ]]; then
      echo_failed
      error "$(cat "$log_file")"

      echononl "continue anyway [yes/no]: "
      read OK
      OK="$(echo "$OK" | tr '[:upper:]' '[:lower:]')"
      while [[ "$OK" != "yes" ]] && [[  "$OK" != "no" ]] ; do
         echononl "Wrong entry! - repeat [yes/no]: "
         read OK
      done
      [[ $OK = "yes" ]] || fatal "Stopped by user"
   else
      echo_ok
   fi

   echononl "Set Owner Permissions to new log-file (${HTTPD_USER}:${HTTPD_GROUP}).."
   chown $HTTPD_USER:$HTTPD_GROUP /var/log/php-${_version}-fpm/php_errors.log > "$log_file" 2>&1
   if [[ $? -ne 0 ]]; then
      echo_failed
      error "$(cat "$log_file")"

      echononl "continue anyway [yes/no]: "
      read OK
      OK="$(echo "$OK" | tr '[:upper:]' '[:lower:]')"
      while [[ "$OK" != "yes" ]] && [[  "$OK" != "no" ]] ; do
         echononl "Wrong entry! - repeat [yes/no]: "
         read OK
      done
      [[ $OK = "yes" ]] || fatal "Stopped by user"
   else
      echo_ok
   fi

   echononl "Set parameter 'error_log' at PHP ini file.."
   perl -i -n -p -e "s#^error_log\s*=.*#error_log = \"/var/log/php-${_version}-fpm/php_errors.log\"#" \
      /usr/local/php-${_version}/etc/php.ini > "$log_file" 2>&1
   if [[ $? -ne 0 ]]; then
      echo_failed
      error "$(cat "$log_file")"

      echononl "continue anyway [yes/no]: "
      read OK
      OK="$(echo "$OK" | tr '[:upper:]' '[:lower:]')"
      while [[ "$OK" != "yes" ]] && [[  "$OK" != "no" ]] ; do
         echononl "Wrong entry! - repeat [yes/no]: "
         read OK
      done
      [[ $OK = "yes" ]] || fatal "Stopped by user"
   else
      echo_ok
   fi

   echononl "Create configuration file for logrotation.."
   cat << EOF > /etc/logrotate.d/php-${_version}-fpm
/var/log/php-${_version}-fpm/*log {
   daily
   rotate 7
   start 0
   compress
   delaycompress
   missingok
   notifempty
   sharedscripts
   postrotate
      if [[ -f " /var/log/php-${_version}-fpm/php_errors.log" ]] ; then
         chown ${HTTPD_USER}:$HTTPD_GROUP  /var/log/php-${_version}-fpm/php_errors.log
      fi
      [ ! -f /run/php-${_version}-fpm.pid ]] || kill -USR1 \$(cat /run/php-${_version}-fpm.pid)
   endscript
}
EOF
   if [[ $? -ne 0 ]]; then
      echo_failed
      error "$(cat "$log_file")"

      echononl "continue anyway [yes/no]: "
      read OK
      OK="$(echo "$OK" | tr '[:upper:]' '[:lower:]')"
      while [[ "$OK" != "yes" ]] && [[  "$OK" != "no" ]] ; do
         echononl "Wrong entry! - repeat [yes/no]: "
         read OK
      done
      [[ $OK = "yes" ]] || fatal "Stopped by user"
   else
      echo_ok
   fi

   echononl "Restart PHP FPM ${_version} process.."
   systemctl restart php-${_version}-fpm > "$log_file" 2>&1
   if [[ $? -ne 0 ]]; then
      echo_failed
      error "$(cat "$log_file")"
   else
      echo_ok
   fi

done

blank_line
clean_up 0