Missing Date of Information

If Date of Information is missing it has to be set depending on type of item.

SELECT
fieldreport.fieldreport_localid,
fieldreport.dateofreport AS `Date of Information`,
fieldreport.reportreceiveddate AS `Data Entry Date`,
fieldreport.reportcompleteddate AS `Submitted Date`,
fieldreport.reportverifieddate AS `Approved Date`,
fieldreport.dataenterer AS `Data enterer`,
fieldreport.verifiedby AS `Approved by`
FROM
fieldreport
WHERE
fieldreport.dateofreport IS NULL
ORDER BY
fieldreport.fieldreport_localid ASC