#!/bin/bash
######################################################
# enable and extend nano editor syntax highlighting
# written by George Liu centminmod.com
######################################################
# variables
#############
DT=$(date +"%d%m%y-%H%M%S")
CENTMINLOGDIR='/root/centminlogs'

DIR_TMP="/svr-setup"
FORCE_IPVFOUR='y' # curl/wget commands through script force IPv4
######################################################
# set locale temporarily to english
# due to some non-english locale issues
export LC_ALL=en_US.UTF-8
export LANG=en_US.UTF-8
export LANGUAGE=en_US.UTF-8
export LC_CTYPE=en_US.UTF-8
# disable systemd pager so it doesn't pipe systemctl output to less
export SYSTEMD_PAGER=''
ARCH_CHECK="$(uname -m)"

shopt -s expand_aliases
for g in "" e f; do
    alias ${g}grep="LC_ALL=C ${g}grep"  # speed-up grep, egrep, fgrep
done

CENTOSVER=$(awk '{ print $3 }' /etc/redhat-release)

if [ "$CENTOSVER" == 'release' ]; then
    CENTOSVER=$(awk '{ print $4 }' /etc/redhat-release | cut -d . -f1,2)
    if [[ "$(cat /etc/redhat-release | awk '{ print $4 }' | cut -d . -f1)" = '7' ]]; then
        CENTOS_SEVEN='7'
    elif [[ "$(cat /etc/redhat-release | awk '{ print $4 }' | cut -d . -f1)" = '8' ]]; then
        CENTOS_EIGHT='8'
    elif [[ "$(cat /etc/redhat-release | awk '{ print $4 }' | cut -d . -f1)" = '9' ]]; then
        CENTOS_NINE='9'
    fi
fi

if [[ "$(cat /etc/redhat-release | awk '{ print $3 }' | cut -d . -f1)" = '6' ]]; then
    CENTOS_SIX='6'
fi

# Check for Redhat Enterprise Linux 7.x
if [ "$CENTOSVER" == 'Enterprise' ]; then
    CENTOSVER=$(awk '{ print $7 }' /etc/redhat-release)
    if [[ "$(awk '{ print $1,$2 }' /etc/redhat-release)" = 'Red Hat' && "$(awk '{ print $7 }' /etc/redhat-release | cut -d . -f1)" = '7' ]]; then
        CENTOS_SEVEN='7'
        REDHAT_SEVEN='y'
    fi
fi

if [[ -f /etc/system-release && "$(awk '{print $1,$2,$3}' /etc/system-release)" = 'Amazon Linux AMI' ]]; then
    CENTOS_SIX='6'
fi

# ensure only el8+ OS versions are being looked at for alma linux, rocky linux
# oracle linux, vzlinux, circle linux, navy linux, euro linux
EL_VERID=$(awk -F '=' '/VERSION_ID/ {print $2}' /etc/os-release | sed -e 's|"||g' | cut -d . -f1)
if [ -f /etc/almalinux-release ] && [[ "$EL_VERID" -eq 8 || "$EL_VERID" -eq 9 ]]; then
  CENTOSVER=$(awk '{ print $3 }' /etc/almalinux-release | cut -d . -f1,2)
  ALMALINUXVER=$(awk '{ print $3 }' /etc/almalinux-release | cut -d . -f1,2 | sed -e 's|\.|000|g')
  if [[ "$(echo $CENTOSVER | cut -d . -f1)" -eq '8' ]]; then
    CENTOS_EIGHT='8'
    ALMALINUX_EIGHT='8'
  elif [[ "$(echo $CENTOSVER | cut -d . -f1)" -eq '9' ]]; then
    CENTOS_NINE='9'
    ALMALINUX_NINE='9'
  fi
elif [ -f /etc/rocky-release ] && [[ "$EL_VERID" -eq 8 || "$EL_VERID" -eq 9 ]]; then
  CENTOSVER=$(awk '{ print $4 }' /etc/rocky-release | cut -d . -f1,2)
  ROCKYLINUXVER=$(awk '{ print $3 }' /etc/rocky-release | cut -d . -f1,2 | sed -e 's|\.|000|g')
  if [[ "$(echo $CENTOSVER | cut -d . -f1)" -eq '8' ]]; then
    CENTOS_EIGHT='8'
    ROCKYLINUX_EIGHT='8'
  elif [[ "$(echo $CENTOSVER | cut -d . -f1)" -eq '9' ]]; then
    CENTOS_NINE='9'
    ROCKYLINUX_NINE='9'
  fi
elif [ -f /etc/oracle-release ] && [[ "$EL_VERID" -eq 8 || "$EL_VERID" -eq 9 ]]; then
  CENTOSVER=$(awk '{ print $5 }' /etc/oracle-release | cut -d . -f1,2)
  if [[ "$(echo $CENTOSVER | cut -d . -f1)" -eq '8' ]]; then
    CENTOS_EIGHT='8'
    ORACLELINUX_EIGHT='8'
  elif [[ "$(echo $CENTOSVER | cut -d . -f1)" -eq '9' ]]; then
    CENTOS_NINE='9'
    ORACLELINUX_NINE='9'
  fi
elif [ -f /etc/vzlinux-release ] && [[ "$EL_VERID" -eq 8 || "$EL_VERID" -eq 9 ]]; then
  CENTOSVER=$(awk '{ print $4 }' /etc/vzlinux-release | cut -d . -f1,2)
  if [[ "$(echo $CENTOSVER | cut -d . -f1)" -eq '8' ]]; then
    CENTOS_EIGHT='8'
    VZLINUX_EIGHT='8'
  elif [[ "$(echo $CENTOSVER | cut -d . -f1)" -eq '9' ]]; then
    CENTOS_NINE='9'
    VZLINUX_NINE='9'
  fi
elif [ -f /etc/circle-release ] && [[ "$EL_VERID" -eq 8 || "$EL_VERID" -eq 9 ]]; then
  CENTOSVER=$(awk '{ print $4 }' /etc/circle-release | cut -d . -f1,2)
  if [[ "$(echo $CENTOSVER | cut -d . -f1)" -eq '8' ]]; then
    CENTOS_EIGHT='8'
    CIRCLELINUX_EIGHT='8'
  elif [[ "$(echo $CENTOSVER | cut -d . -f1)" -eq '9' ]]; then
    CENTOS_NINE='9'
    CIRCLELINUX_NINE='9'
  fi
elif [ -f /etc/navylinux-release ] && [[ "$EL_VERID" -eq 8 || "$EL_VERID" -eq 9 ]]; then
  CENTOSVER=$(awk '{ print $5 }' /etc/navylinux-release | cut -d . -f1,2)
  if [[ "$(echo $CENTOSVER | cut -d . -f1)" -eq '8' ]]; then
    CENTOS_EIGHT='8'
    NAVYLINUX_EIGHT='8'
  elif [[ "$(echo $CENTOSVER | cut -d . -f1)" -eq '9' ]]; then
    CENTOS_NINE='9'
    NAVYLINUX_NINE='9'
  fi
elif [ -f /etc/el-release ] && [[ "$EL_VERID" -eq 8 || "$EL_VERID" -eq 9 ]]; then
  CENTOSVER=$(awk '{ print $3 }' /etc/el-release | cut -d . -f1,2)
  if [[ "$(echo $CENTOSVER | cut -d . -f1)" -eq '8' ]]; then
    CENTOS_EIGHT='8'
    EUROLINUX_EIGHT='8'
  elif [[ "$(echo $CENTOSVER | cut -d . -f1)" -eq '9' ]]; then
    CENTOS_NINE='9'
    EUROLINUX_NINE='9'
  fi
fi

CENTOSVER_NUMERIC=$(echo $CENTOSVER | sed -e 's|\.||g')

if [ -f "/etc/centminmod/custom_config.inc" ]; then
  # default is at /etc/centminmod/custom_config.inc
  dos2unix -q "/etc/centminmod/custom_config.inc"
  . "/etc/centminmod/custom_config.inc"
fi

######################################################
enable_syntax() {
    cd $DIR_TMP
    rm -rf nanorc
    echo
    echo "Setup Extended Syntax Highlighting for nano editor"
    echo
    echo "To properly configure the right colors for your SSH client,"
    echo "script needs to know your configured text color in your SSH"
    echo "client. If your SSH client configured text color is other"
    echo "than black text, you need to specify what color text you want"
    echo
    echo "Choose your desired text color from the following options"
    echo "black, red, green, yellow, blue, magenta, cyan or white"
    echo "i.e. if you have white text on black background, choose"
    echo "white text below"
    echo
    read -ep "Which color do you want to set for text in syntax highlighting ? " color_opt
    echo
    time git clone --depth=1 https://github.com/centminmod/nanorc
    if [ -d nanorc ]; then
        cd nanorc
        make install-global TEXT=$color_opt
    
        if [[ -d /usr/local/share/nano && -f /etc/nanorc ]]; then
            NANORC_LIST='shell.nanorc nginx.nanorc go.nanorc ini.nanorc javascript.nanorc json.nanorc markdown.nanorc rpmspec.nanorc sql.nanorc systemd.nanorc yaml.nanorc yum.nanorc'
            if [[ -z "$(grep '#include "\/usr\/share\/nano\/sh.nanorc"' /etc/nanorc)" ]]; then
                sed -i "s|^include "\/usr\/share\/nano\/sh.nanorc"|#include "\/usr\/share\/nano\/sh.nanorc"|" /etc/nanorc
            fi
            for n in $NANORC_LIST; do
                if [[ -z "$(grep "$n" /etc/nanorc)" ]] ; then
                    echo "setup $n syntax highlighting"
                    echo -e "\n## $n" >> /etc/nanorc
                    echo "include \"/usr/local/share/nano/$n\"" >> /etc/nanorc
                fi
                # if [[ "$(grep "$n" /etc/nanorc | grep 'nginx.nanorc')" ]] ; then
                #     echo "disable $n syntax highlighting"
                #     sed -i "s|^include \"\/usr\/local\/share\/nano\/$n|#include \"\/usr\/local\/share\/nano\/$n|"  /etc/nanorc
                # fi
                if [[ "$(grep "$n" /etc/nanorc | grep 'nginx.nanorc')" ]] ; then
                    echo "re-enable $n syntax highlighting"
                    sed -i "s|^#include \"\/usr\/local\/share\/nano\/$n|include \"\/usr\/local\/share\/nano\/$n|"  /etc/nanorc
                fi
            done
        fi
    fi
    echo "done..."
}

enable_syntax