Time tracking bash script for Mac OS X - periodically asks what you have been doing

track.sh

#!/bin/sh

input=

while true
do

input="$(/usr/bin/osascript 2>/dev/null <<-__HEREDOC__
   with timeout of 300 seconds
      tell application "System Events"
         activate
         set notes to display dialog "What ya been up to?" \
            with title "Oi!" \
            with icon note \
            default answer "$input" & return & return & return & return \
            buttons {"Cancel", "OK"} \
            default button 2 \
            giving up after 295
          set the_result to the result
          set gave_up to gave up of the_result
          if gave_up is true then
            return "Away"
          end if
          keystroke "h" using command down
          return text returned of notes as string
      end tell
   end timeout
__HEREDOC__
)"

# replace CR with LF
' 'ut=$(echo $input | tr '
')

# trim whitespace
input=$(expr "$input" : '[[:space:]]*\(.*[^[:space:]]\)[[:space:]]*$')

echo "$(date "+%Y-%m-%d,%H:%M:%S"),\"$input\"" >> time-log-$(date "+%Y-%m-%d").txt

sleep 1800 

done