#!/bin/bash

# Usage:
# speedy.sh <filename> [<filesize>]

clear
OLDFILESIZE=`ls -al "$1" | awk '{print \$5}'`
SECS=`date +%s`
sleep 1
while true; do
 FILESIZE=`ls -al "$1" | awk '{print \$5}'`

# Bugfix. Now the time is more accurate.
 OLDSECS=$SECS
 SECS=`date +%s`

 let "SECDIFF = $SECS - $OLDSECS"
 let "DIFF = $FILESIZE - $OLDFILESIZE"
 let "SPEED = $DIFF / $SECDIFF / 1024"
  if [ $2 ]
        then
          if [ $DIFF -eq 0 ] 
            then 
             ETA='\033[01;31mstalled!\033[00m'
             ETAM=""
            else
             let "ETA = (($2*1024*1024) - $FILESIZE )* $SECDIFF / $DIFF"
             let "ETAM = $ETA/60"
             ETA="\\033[01;32m$ETA\\033[00m s"
             ETAM="\\033[01;32m$ETAM\\033[00m m"
          fi
         echo -e "Filesize: \\033[01;33m$2\\033[00m MB | Downloaded: \\033[01;33m$FILESIZE\\033[00m bytes"
         echo -e "$1 download speed = $SPEED Kb/s  | ETA: $ETA - $ETAM"
         echo -n "Press any key to exit" 
         if read -t 3 response 
           then exit 
         fi
  else
    echo "Downloaded: $FILESIZE bytes"
    echo "$1 download speed = $SPEED Kb/s"
    echo -n "Press any key to exit" 
    if read -t 3 response 
      then exit 
    fi
  fi
    let "OLDFILESIZE = $FILESIZE"
 clear
done