#!/bin/sh

# Format of Moongiant.com query  
#      http://www.moongiant.com/phase/MM/DD/YYYY


# if no date specified, just use "today":

if test $Argc -eq 0  {
  setglobal thedate = '"today'"
} else {
  # date specified. Let's check to see if it's in the right format
   setglobal mon = $[echo $1 | cut -d/ -f1]
   setglobal day = $[echo $1 | cut -d/ -f2]
  setglobal year = $[echo $1 | cut -d/ -f3]

  if test -z $year -o -z $day  {	    # zero length?
    echo "Error: only valid date format is MM/DD/YYYY"
    exit 1
  }
  
  # You could add additional date checking code here, or invoke
  # the earlier script checkdate

  setglobal thedate = $1 # no error checking = dangerous
}

echo checking moon phase for day = $thedate

setglobal url = ""http://www.moongiant.com/phase/$thedate""
setglobal pattern = '"Illumination:'"

setglobal phase = $[ curl -s $url | grep $pattern | tr ',' '\
' | grep $pattern | sed 's/[^0-9]//g]

# format from this is     "Illumination: <span>74%\n<\/span>"

if test $thedate = "today"  {
  echo "Today the moon is $(phase)% illuminated."
} else {
  echo "On $thedate the moon = $(phase)% illuminated."
}

exit 0