filebrowse.sh

#!/bin/bash

: '
                   filebrowse.sh written by Claude Pageau

This is a whiptail file browser demo that allows navigating through a directory
structure and select a specified file type per filext variable.
It Returns a filename path if selected.  Esc key exits.
This sample code can be used in a script menu to perform an operation that
requires selecting a file.

'

startdir="/home/pi"
filext='jpg'
menutitle="$filext File Selection Menu"

#------------------------------------------------------------------------------
function Filebrowser()
{
# first parameter is Menu Title
# second parameter is optional dir path to starting folder
# otherwise current folder is selected

    if [ -z $2 ] ; then
        dir_list=$(ls -lhp  | awk -F ' ' ' { print $9 " " $5 } ')
    else
        cd "$2"
        dir_list=$(ls -lhp  | awk -F ' ' ' { print $9 " " $5 } ')
    fi

    curdir=$(pwd)
    if [ "$curdir" == "/" ] ; then  # Check if you are at root folder
        selection=$(whiptail --title "$1" \
                              --menu "PgUp/PgDn/Arrow Enter Selects File/Folder\nor Tab Key\n$curdir" 0 0 0 \
                              --cancel-button Cancel \
                              --ok-button Select $dir_list 3>&1 1>&2 2>&3)
    else   # Not Root Dir so show ../ BACK Selection in Menu
        selection=$(whiptail --title "$1" \
                              --menu "PgUp/PgDn/Arrow Enter Selects File/Folder\nor Tab Key\n$curdir" 0 0 0 \
                              --cancel-button Cancel \
                              --ok-button Select ../ BACK $dir_list 3>&1 1>&2 2>&3)
    fi

    RET=$?
    if [ $RET -eq 1 ]; then  # Check if User Selected Cancel
       return 1
    elif [ $RET -eq 0 ]; then
       if [[ -d "$selection" ]]; then  # Check if Directory Selected
          Filebrowser "$1" "$selection"
       elif [[ -f "$selection" ]]; then  # Check if File Selected
          if [[ $selection == *$filext ]]; then   # Check if selected File has .jpg extension
            if (whiptail --title "Confirm Selection" --yesno "DirPath : $curdir\nFileName: $selection" 0 0 \
                         --yes-button "Confirm" \
                         --no-button "Retry"); then
                filename="$selection"
                filepath="$curdir"    # Return full filepath  and filename as selection variables
            else
                Filebrowser "$1" "$curdir"
            fi
          else   # Not correct extension so Inform User and restart
             whiptail --title "ERROR: File Must have $filext Extension" \
                      --msgbox "$selection\nYou Must Select a $filext file" 0 0
             Filebrowser "$1" "$curdir"
          fi
       else
          # Could not detect a file or folder so Try Again
          whiptail --title "ERROR: Selection Error" \
                   --msgbox "Error Changing to Path $selection" 0 0
          Filebrowser "$1" "$curdir"
       fi
    fi
}


Filebrowser "$menutitle" "$startdir"

exitstatus=$?
if [ $exitstatus -eq 0 ]; then
    if [ "$selection" == "" ]; then
        echo "User Pressed Esc with No File Selection"
    else
        whiptail --title "File was selected" --msgbox " \

        File Selected information

        Filename : $filename
        Directory: $filepath

        \
        " 0 0 0
        echo ""
        echo "---- $0 variable output values -----"
        echo ""
        echo '$filename = '$filename
        echo '$filepath = '$filepath
        echo ""
        echo "You can combine variables per"
        echo 'echo $filepath/$filename'
        echo "result is"
        echo "$filepath/$filename"
        echo ""
        echo "Variables can be used in command execution"
    fi
else
    echo "User Pressed Cancel. with No File Selected."
fi
echo ""
echo "This is demo code that can be used in your own projects"