Casper warranty estimation, stored locally at /Library/Preferences/com.apple.warranty - in python!

warranty_update.py

#!/usr/bin/python
import os.path, subprocess, datetime, dateutil.parser, time, sys

def apple_year_offset(dateobj, years=0):
    # Convert to a maleable format
    mod_time = dateobj.timetuple()
    # Offset year by number of years
    mod_time = time.struct_time(tuple([mod_time[0]+years]) + mod_time[1:])
    # Convert back to a datetime obj
    return datetime.datetime.fromtimestamp(int(time.mktime(mod_time)))

def estimated_warranty_date_from_serial(serial):
    # http://www.macrumors.com/2010/04/16/apple-tweaks-serial-number-format-with-new-macbook-pro/
    est_date = u''
    if 10 < len(serial) < 13:
        if len(serial) == 11:
            # Old format
            year = serial[2].lower()
            est_year = 2000 + '   3456789012'.index(year)
            week = int(serial[3:5]) - 1
            year_time = datetime.date(year=est_year, month=1, day=1)
            if (week):
                week_dif = datetime.timedelta(weeks=week)
                year_time += week_dif
        else:
            # New format
            alpha_year = 'cdfghjklmnpqrstvwxyz'
            year = serial[3].lower()
            est_year = 2010 + (alpha_year.index(year) / 2)
            # 1st or 2nd half of the year
            est_half = alpha_year.index(year) % 2
            week = serial[4].lower()
            alpha_week = ' 123456789cdfghjklmnpqrtvwxy'
            est_week = alpha_week.index(week) + (est_half * 26) - 1
            year_time = datetime.date(year=est_year, month=1, day=1)
            if (est_week):
                week_dif = datetime.timedelta(weeks=est_week)
                year_time += week_dif
    return apple_year_offset(year_time, 3).strftime('%Y-%m-%d')

def warranty_is_expired(date_string):
    ExpirationDate=dateutil.parser.parse(date_string).date()
    TodaysDate=datetime.date.today()
    return TodaysDate > ExpirationDate

def main():
    if os.path.exists('/Library/Preferences/com.apple.warranty.plist'):
        # get plist data
        WarrantyDate=subprocess.check_output(['/usr/bin/defaults', 'read', '/Library/Preferences/com.apple.warranty', 'WarrantyDate']).rstrip()
        WarrantyStatus=subprocess.check_output(['/usr/bin/defaults', 'read', '/Library/Preferences/com.apple.warranty', 'WarrantyStatus']).rstrip()
        
        # if warranty is listed as active but date is expired, update plist entry
        if (WarrantyStatus == "Active") and (warranty_is_expired(WarrantyDate)): 
            WarrantyStatus="Inactive"
            result_code = subprocess.call(['/usr/bin/defaults', 'write', '/Library/Preferences/com.apple.warranty', 'WarrantyStatus', WarrantyStatus])
            print "Status updated."
        else:
            print "Status unchanged."
        print "<result>%s : %s</result>" % (WarrantyStatus, WarrantyDate)
        sys.exit(0)

    # get serial number
    SerialNumber=subprocess.check_output('ioreg -l | awk \'/IOPlatformSerialNumber/ { split($0, line, "\\""); printf("%s\\n", line[4]); }\'', shell=True).rstrip()
    if not SerialNumber:
        print "Serial Number not found."
        sys.exit(1)

    # Now we use the code above
    WarrantyDate = estimated_warranty_date_from_serial(SerialNumber)
    if warranty_is_expired(WarrantyDate):
        WarrantyStatus = "Expired"
    else:
        WarrantyStatus = "Active"

    result_code = subprocess.call(['/usr/bin/defaults', 'write', '/Library/Preferences/com.apple.warranty', 'WarrantyStatus', WarrantyStatus])
    result_code = subprocess.call(['/usr/bin/defaults', 'write', '/Library/Preferences/com.apple.warranty', 'WarrantyDate', WarrantyDate])

    print "Serial Number:", SerialNumber
    print "Warranty Status:", WarrantyStatus
    print "Warranty Expiration:", WarrantyDate
    print "<result>%s : %s</result>" % (WarrantyStatus, WarrantyDate)

if __name__ == "__main__":
    main()