Module credit_registration_account_linking_emails 

Dedup ledger for account-linking mails.

Keyed on the Sisu person id plus the recipient address: at send time there is no account of ours to key on, and the student number changes when a student moves between programmes.

Structs

CreditRegistrationAccountLinkingEmail

NewAccountLinkingEmail

Functions

claim_send_slot

Claims the right to mail this (person, course, address) exactly once. None means a mail was already recorded and the caller must not send.

count_sent_for_person_and_course

Backs the rate cap of at most a few mails ever per (person, course), even when tokens expire unused.

count_sent_since

Backs the rate cap of at most one mail per Sisu person per window, across all courses.

get_by_course_id

get_by_sisu_person_id

soft_delete

Lets a rate-cap override or an admin resend mail the same address again.