Arduino,Mega2560 I2C Eeprom 24XX256 RFID DB

I need a rountine for logging to i2c-eeprom. 1: Swipe rfid card 2: Check, if it is in the eeprom -return name of cardholder(also stored in eeprom) 2 if so, chek pin-code(in Eeprom) 3if correct, log some data in eeprom Example of stored information: Entry,RFIDTAG*******,NameMax20Char,pin***,misc 123,4E00A71C7580,Benny Andersson,1234,1011 Example of LOGGED information: Entry,RFIDTAG*******,Date&Time,a number,a byte 123,4E00A71C7580,01012015-13:30,9999,240 *RFID tags in eeprom needs to be numbered, 1,2,3.... *Needs some way to check how many entrys there are *Needs some way to access/delete a whole entry *Need some function to maintain eeprom, delete, verify, update rfid-list.