#!/bin/bash
# Rclone "remote" drive mounter script v0.7 , GPL licence, by PPC, 19/6/2020
##############

# icon for antiX:
#declare -x icon="/usr/share/icons/papirus-antix/48x48/places/folder-red-meocloud.png"
#icon for MX linux:
 declare -x icon="/usr/share/icons/gnome/48x48/places/gnome-fs-share.png"
Initial_check(){
	#### Check for dependencies, clear files, set variables ####
#Check for needed utilities:
## testing for  yad
 if ! [ -x "$(command -v yad)" ]; then
   x-terminal-emulator -e whiptail --title "Warning" --msgbox "You need to have YAD installed." 8 78
   exit 1
 fi
## testing for rclone and, in a debian system, try to install it if user so selects
 if ! [ -x "$(command -v rclone)" ]; then
	# yad --title="Access Cloud Storage- Error" --window-icon=$icon --center --text=" Please install rclone using your Package Manager! " --button="Close"
	yad --title="Access Cloud Storage" --window-icon=/usr/share/icons/papirus-antix/48x48/places/folder-red-meocloud.png --center --text=" rclone needs to be installed. \n Do you want to automaticaly try to install it (you'll have to relaunch this application)? " --button="Install rclone":1 --button="Close":2	
	  foo=$?
	  [[ $foo -eq 1 ]] && x-terminal-emulator -e gksudo apt install rclone
	exit 1
 fi
#Clear log file(s), export function(s), set global variables:
 rm /tmp/rclone_remote_list.txt
#IF no config file for the tray icon exists, create one and set to show tray by default:
 if [ ! -f /tmp/rclone_tray.txt ]; then
   echo "rclone_tray.txt not found!"
   tray_default="TRUE|"
   echo $tray_default > /tmp/rclone_tray.txt
 fi
# Generate log file with configured "remote" cloud drives and check if log file is empty, if so,  present user with option to configure a new cloud "remote" drive
 rclone listremotes > /tmp/rclone_remote_list.txt
 log_file="/tmp/rclone_remote_list.txt"
 [ -s $log_file ] || Manage_remotes
} # end of initial_check

Help(){
# show Help screen
   yad --title="Access Cloud Storage - Help" --window-icon=$icon --center --width=450 --height=550  --fixed --text="\n What is this: \n This application makes many Cloud storage devices, like Google Drive, Ms One Drive, etc, accessible from your default File Manager, just like they were a network drive or a thumb-drive. \n  This is simply a Graphics User Interface for rclone, that is used to mount those services. \n \n What this is not:\n This is not a way to sync a folder with any cloud service, so, if you don't have access to the Internet, you have no local copy of any file stored on the cloud (unless you previously downloaded it to your computer).\n \n Notes:\n -To view the contents of some cloud drives, like OneDrive, you may need to refresh your File Manager.\n -When the user starts a 'remote' cloud drive, a tray icon is launched, to provide easy access to the main menu. This tray icon only closes when the 'Quit' button is pressed. \n \n How to configure your cloud storage service:\n 1- When you launch this application for the first time you are shown the 'Manage' menu, that allows you to try to automaticaly configure your Google Drive Account. \n If you click the 'Google Drive' Button, your internet browser opens on your cloud account service. You have to log on and autorise 'rclone' access to your account. After the config process is done, if you don't want to configure more services, click the 'Quit' button and the main Window pops up. From there you can double left click your Cloud account name, to access it's contents. \n At any time, in the main window, if you click the 'Manage drives' button, will will be presented with the initial configuration menu. \n 2- Manually configuring cloud storage services: \n if you click the 'Manage' button, a terminal will pop open. You have to use the keyboard to perform your selections. After you finished seting up your cloud service, press 'q' from the main terminal menu to exit. Restart this application to access the 'remote' drives you just configured. \n \n SECURITY WARNING: \n Do not use this application on a shared computer, because this provides access to your cloud accounts without any need of entering a password!!!" --button="On line help":0 --button="Close":1	
   foo=$?
   [[ $foo -eq 0 ]] && xdg-open http://rclone.org/drive/
} # end of 'Help' function

Tray_icon(){
#Show traybar icon (if user checked the Tray checkbox, in the main window, on by default): (the pkill yad garantees that there are no multiple instances of the icon on the toolbar, unfortunatly, also closes any other running yad window (TO-DO: find another way to avoid multiple instances) 
 tray="TRUE|"
  if grep -Fxq $tray /tmp/rclone_tray.txt ;then
    pkill yad
    yad --notification --image=$icon --command="bash -c Main_window" --text="Left click: Access Cloud Storage (Middle click: exits)"
      else
        cat /tmp/rclone_tray.txt
#    exit 1
  fi
} #end of Tray_icon

Manage_remotes(){
 export -f Help Main_window
	
# Manage "remotes" or automaticaly add a Google Drive account- this automaticaly pops up if no "remote" cloud drives are configured
 yad --title="Access Cloud Storage - Configuration" --window-icon=$icon --center --text="\n Use the buttons bellow to configure a 'remote' Cloud account \n You can access an on-line example of how to manually configure a Google Drive account from the Help window. \n  " --button="Manage Cloud Drives":'x-terminal-emulator -e rclone config' --button="Automatically add Google Drive":'x-terminal-emulator -e rclone config create GoogleDrive drive config_is_local false' --button="Tray icon":3 --button="Help":"bash -c Help" --button="Close":4
   foo=$?
   if [[ $foo -eq 3 ]]; then
     tray=$(yad  --title="Access Cloud Storage - Configuration" --window-icon=$icon --form --center --field 'Use Tray icon - NOTE: Requires restart!':chk true) && echo $tray > /tmp/rclone_tray.txt
   fi
		
 Main_window
	
	} #end of 'Manage_remotes' funtion
	
Main_window(){
### Main Window ####
### export functions, set variables:
 export -f Help Manage_remotes Main_window
##now=`date +"%Y-%m-%d"`
# Choose an existing "remote" cloud service using yad (or unmount or manage "remotes")
 rclone listremotes > /tmp/rclone_remote_list.txt
 log_file="/tmp/rclone_remote_list.txt"
 selection=$(yad --title="Access Cloud Storage" --window-icon=$icon --width=550 --height=400 --center --separator=" " --list  --column=" Double click the 'remote' Cloud service that you want to access "  --button="Unmount Drives!!Unmounts all 'remote' cloud drives":1 --button="Configuration!!Manage cloud drives and the tray icon":2 --button="Help":"bash -c Help" --button="Quit!gtk-quit!Closes the application and its tray icon":3 < /tmp/rclone_remote_list.txt)
 foo=$?

  if [[ $foo -eq 3 ]]; then
    pkill yad
	exit 1
  fi

  if [[ $foo -eq 2 ]]; then
	Manage_remotes
  fi

  if [[ $foo -eq 1 ]]; then
	# unmount all "remote" cloud drives
	pkill rclone
    # Try to delete empty mountpoint directories listed in log file:
    file=~/.rclone_mountpoint_list.conf
    touch $file
    lines=`cat $file`
      for line in $lines; do
        printf "\n**Trying to remove moint point: ${line} **\n\n"
        eval fusermount -u ~/"${line}"
        eval rmdir ~/"${line}"
      done
	# Delete log file
	rm $file	
	Main_window
 fi

####This avoids errors, if no selection was made:
 if [ -z "$selection" ]; then
   exit 1
 fi

#### Mount and show "remote" cloud drive:
# create a mount point using the same name as the remote, without spaces, AND CURRENT DATE to avoid problems:
 mount_point=$(echo $selection | sed 's/.$//')
 mount_point_no_spaces=$(echo $mount_point | sed -e 's/ //g')
 mount_point_no_spaces=$mount_point_no_spaces-${now}
 mkdir ~/$mount_point_no_spaces
# add name of directory to a config file, to be able to, when unmounting, also delete the empty mount point folder
 ( echo $mount_point_no_spaces ; echo "" ) >> ~/.rclone_mountpoint_list.conf
# mount the cloud service
 comma="'"
 and="&"
 myVar=$(echo "rclone --vfs-cache-mode writes mount "${comma}""${selection}"${comma}")
 myVar2=`echo $myVar | sed -E 's/.(.)$/\1/'`
 eval "nohup  $myVar2 ~/$mount_point_no_spaces $and"
 echo  Running mount command: $myVar2 ~/$mount_point_no_spaces
#show the cloud service contents on the default file manager: for other distros other than antiX, that have xdg-open installed uncoment the following line and comment the "desktop-defaults" one...
  cd ~ && thunar $mount_point_no_spaces &
 # desktop-defaults-run -fm ~/$mount_point_no_spaces
} #end of 'Main_window' funtion
 
#Start Script:
 export -f Help Manage_remotes Initial_check Main_window Tray_icon
 Initial_check
 Main_window
 Tray_icon