customize.sh

#!/usr/bin/env bash
IFS=$'\n\t'

sudo echo

RED='\033[0;31m'
GREEN='\033[0;32m'
BROWN='\033[0;33m'
BLUE='\033[0;34m'
PURPLE='\033[0;35m'
CYAN='\033[0;36m'
GRAY='\033[0;37m'
LGRAY='\033[1;30m'
LRED='\033[1;31m'
LGREEN='\033[1;32m'
YELLOW='\033[1;33m'
LBLUE='\033[1;34m'
LPURPLE='\033[1;35m'
LCYAN='\033[1;36m'
WHITE='\033[1;37m'
NC='\033[0m'

verify()
{
  echo "Verifying resources..."
  if [ -d /boot/grub/themes/b-grub ] 
  then 
  	echo -e "${LGREEN}Located directory :${NC} /boot/grub/themes/b-grub"
  else
    echo -e "${LRED}ERROR: ${NC}Failed to locate /boot/grub/themes/b-grub. Run 'install.sh' to rectify the error"
    return 0
  fi
  
  if [ -f /boot/grub/themes/b-grub/grub_background.sh ] 
  then 
  	echo -e "${LGREEN}Located ${NC}/boot/grub/themes/b-grub/grub_background.sh"
  else
    echo -e "${LRED}ERROR: ${NC}Failed to locate /boot/grub/themes/b-grub/grub_background.sh. Run 'install.sh' to rectify the error"
    return 0
  fi
  
  if [ -f /boot/grub/themes/b-grub/item_c.png ]
  then 
  	echo -e "${LGREEN}Located ${NC}/boot/grub/themes/b-grub/item_c.png"
  else
    echo -e "${LRED}ERROR: ${NC}Failed to locate /boot/grub/themes/b-grub/item_c.png. Run 'install.sh' to rectify the error"
    return 0
  fi
  
  if [ -d /boot/grub/themes/b-grub/icons ]
  then 
  	echo -e "${LGREEN}Located directory :${NC} /boot/grub/themes/b-grub/icons"
  else
    echo -e "${LRED}ERROR: ${NC}Failed to locate /boot/grub/themes/b-grub/icons. Run 'install.sh' to rectify the error"
    return 0
  fi
  
  if [[ -f /boot/grub/themes/b-grub/background.jpg || -f /boot/grub/themes/b-grub/background.png ]]
  then 
  	echo -e "${LGREEN}Located ${NC}/boot/grub/themes/b-grub/background.jpg"
  else
    echo -e "${LRED}ERROR: ${NC}Failed to locate /boot/grub/themes/b-grub/background.jpg. Run 'install.sh' to rectify the error"
    return 0
  fi
  
  if [ -f /boot/grub/themes/b-grub/select_c.png ]
  then 
  	echo -e "${LGREEN}Located ${NC}/boot/grub/themes/b-grub/select_c.png"
  else
    echo -e "${LRED}ERROR: ${NC}Failed to locate /boot/grub/themes/b-grub/select_c.png. Run 'install.sh' to rectify the error"
    return 0
  fi
  
  if [ -f /boot/grub/themes/b-grub/select_e.png ]
  then 
  	echo -e "${LGREEN}Located ${NC}/boot/grub/themes/b-grub/select_e.png"
  else
    echo -e "${LRED}ERROR: ${NC}Failed to locate /boot/grub/themes/b-grub/select_e.png. Run 'install.sh' to rectify the error"
    return 0
  fi
  
  if [ -f /boot/grub/themes/b-grub/select_w.png ]
  then 
  	echo -e "${LGREEN}Located ${NC}/boot/grub/themes/b-grub/select_w.png"
  else
    echo -e "${LRED}ERROR: ${NC}Failed to locate /boot/grub/themes/b-grub/select_w.png. Run 'install.sh' to rectify the error"
    return 0
  fi
  
  if [ -f /boot/grub/themes/b-grub/theme.txt ]
  then 
  	echo -e "${LGREEN}Located ${NC}/boot/grub/themes/b-grub/theme.txt"
  else
    echo -e "${LRED}ERROR: ${NC}Failed to locate /boot/grub/themes/b-grub/theme.txt. Run 'install.sh' to rectify the error"
    return 0
  fi
  
  if [ -f /boot/grub/themes/b-grub/*.pf2 ]
  then 
  	echo -e "${LGREEN}Located ${NC}/boot/grub/themes/b-grub/*.pf2"
  else
  	echo -e "${LRED}ERROR: ${NC}Failed to locate font file. Run 'install.sh' to rectify the error"
  	return 0
  fi
  return 1
}

background()
{
  printf "${LPURPLE}\n--------------------------------------------------------------------\nFor better resolution use images with an aspect ratio of 4x3 or 16x9\n--------------------------------------------------------------------"
  FILE=""
  printf "\n${LPURPLE} \n${YELLOW}Select the image file${GREEN}(.jpg .png) :${NC} "
  FILE=$(zenity --file-selection --title "Select a file")
  while true
  do  
    if [[ -z "$FILE" ]] 
    then
      printf "\n${LRED}Aborted.${NC}" 
      break;
    fi
    if [ -f "$FILE" ]
    then	
      if [[ $FILE == *.jpg ]]
      then
      	if [ -f /boot/grub/themes/b-grub/background.png ]
      	then 
      		sudo rm -r /boot/grub/themes/b-grub/background.png;
        	sudo sed -i 's/background.png/background.jpg/g' /boot/grub/themes/b-grub/theme.txt;
        fi
      	sudo cp $FILE /boot/grub/themes/b-grub/background.jpg;
        printf "\n${LGREEN}Successfully changed the grub background to ${FILE}.${NC}\n\n${LRED}WARNING: ${LCYAN}Improper aspect ratio of the image might cause problems while loading grub! Run install.sh again to go back to the initial grub settings or uninstall.sh to remove grub theme!\n"
        break;
      elif [[ $FILE == *.png ]]
      then 
        if [ -f /boot/grub/themes/b-grub/background.jpg ]
      	then 
      		sudo rm -r /boot/grub/themes/b-grub/background.jpg;
        	sudo sed -i 's/background.jpg/background.png/g' /boot/grub/themes/b-grub/theme.txt;
        fi	
      	sudo cp $FILE /boot/grub/themes/b-grub/background.png;
      	printf "\n"
        printf "\n${LGREEN}Successfully changed the grub background to ${FILE}.${NC}\n${LRED}WARNING: ${LCYAN}Improper aspect ratio of the image might cause problems while loading grub! Run install.sh again to go back to the initial grub settings or uninstall.sh to remove grub theme!"
        break;
      else
      	printf "\n"
        echo -e "${LRED}ERROR: Unsupported file format (requires .jpg or .png)"
        break;
      fi
    else
     printf "\n"
     echo -e "${LRED}File doesn't exist${NC}"
     break;
    fi
  done
}

font_color()
{
  printf "${LPURPLE}\n-----------------------------------------------------------------------------------------------------------------------------\nEnter the hex value of your desired font color. For example \'ffffff\' for white. To pick a color use${LBLUE} https://g.co/kgs/HX4P4V ${NC}\n-----------------------------------------------------------------------------------------------------------------------------"
  while true
  do
    printf "\n${YELLOW}Hex value of the color for grub menu list : ${NC} "
    read hex1
    if ! [[ $hex1 =~ ^[0-9a-f]{6}$ ]]
    then
    	echo -e "${LRED}Enter a valid hex value."
    else
        sudo sed -i "/  item_color /c\  item_color = \"#${hex1}\"" /boot/grub/themes/b-grub/theme.txt
        break
    fi    
  done
  
  while true
  do
    printf "\n${YELLOW}Hex value of the color for selected item : ${NC} "
    read hex2
    if ! [[ $hex2 =~ ^[0-9a-f]{6}$ ]]
    then
    	echo -e "${LRED}Enter a valid hex value."
    else
        sudo sed -i "/  selected_item_color /c\  selected_item_color = \"#${hex2}\"" /boot/grub/themes/b-grub/theme.txt
    	break
    fi    
  done
  
  while true
  do
    printf "\n${YELLOW}Hex value of the color for extra informations : ${NC} "
    read hex3
    if ! [[ $hex3 =~ ^[0-9a-f]{6}$ ]]
    then
    	echo -e "${LRED}Enter a valid hex value."
    else
    	sudo sed -i "/  color = /c\  color = \"#${hex3}\"" /boot/grub/themes/b-grub/theme.txt
    	echo -e "${LGREEN}The font color was changed successfully."
    	break
    fi    
  done
  
}

echo -e "${LCYAN}Customize b-grub${NC}"

verify ver
if [ $? == 1 ]
then
  echo -e "${GREEN}Requirements met.${NC}"
  printf "\n${WHITE}[*] Select an option\n[1] Change grub background\n[2] Change font color\n[3] change font size\n[4] Change font style\n[5] Exit\n\n"
	while true
	do
	  printf "${YELLOW}ENTER YOUR OPTION: ${NC}"
		read option
		if [ -z "$option" ]
		then
			continue
		elif [ $option == 1 ]
		then
			printf "\n${LCYAN}Background${NC}\n"
			background
  			printf "\n${WHITE}[*] Select an option\n[1] Change grub background\n[2] Change font color\n[3] change font size\n[4] Change font style\n[5] Exit\n\n"

		elif [ $option == 2 ]
		  then
		  	printf "\n${LCYAN}Font Color${NC}\n"
			font_color
  			printf "\n${WHITE}[*] Select an option\n[1] Change grub background\n[2] Change font color\n[3] change font size\n[4] Change font style\n[5] Exit\n\n"
  
		  
		elif [ $option == 3 ]
		  then
		  echo "coming soon"
		  
		elif [ $option == 4 ]
		  then
		  echo "coming soon"
		  
		elif [ $option == 5 ]
		  then
		  echo "To go back to the default settings run install.sh with root permissions."
		  echo "Quitting..."
		  exit 1
		  
		else
		  echo -e "${LRED}Invalid input. Try again.${NC}"
		fi
	done
else
  echo -e "${LRED}Requirements not met. Aborted${NC}"
fi