Qualification
  school              SchoolId --TODO: Ansprechpartner der Schule in Briefe erwähnen
  shorthand           (CI Text)
  name                (CI Text)
  description         StoredMarkup Maybe        -- user-defined large Html, ought to contain full description
  validDuration       Word Maybe    -- qualification is valid for this number of months
  auditDuration       Word Maybe    -- number of month to keep audit log
  refreshWithin       CalendarDiffDays Maybe    -- refresher is scheduled within this number of month before expiry
  -- refreshInvitation   StoredMarkup           -- fest verdrahtet I18N-MSGs, nur Anzeige auf Webseite
  -- expiryNotification  StoredMarkup Maybe
  elearningOnly       Bool     -- successful E-learing automatically increases validity
  UniqueSchoolShort school shorthand            -- must be unique per school and shorthand
  UniqueSchoolName  school name                 -- must be unique per school and name
  deriving Generic

-- Verknüpfung mit Exams fehlt only

QualificationUser
  user              User
  qualification     QualficationId
  validUntil        UTCTime
  firstHeld         UTCTime                     -- timestamp qualification earned
  lastRefresh       UTCTIme                     -- lastRefresh > validUntil possible, indicates E-Learning success, but needs more (e.g. an exam)
  UniqueQualificationUser qualification user

QualificationEdit
  user            User
  time            UTCTime
  qualification   QualificationId OnDeleteCascade OnUpdateCascade
  deriving Generic

-- LMS Interface Tables, need regular processing by background jobs
-- Logging?
LmsUser
  qualification     QualificationId
  user              UserId
  ident             LmsIdent
  pin               Text
  resetPin          Bool
  deleted           Bool
  started           UTCTime Maybe
  ended             UTCTime Maybe
  UniqueLmsUser qualification ident
  deriving Generic

LmsAudit
  qualifaction      QualifactionId
  ident             LmsIdent
  lastSeen          UTCTime
  notificationType  LmsNotification

LmsUserlist
  qualification     QualificationId
  ident             LmsIdent
  failed            Bool
  timestamp         UTCTime default=now()
  UniqueLmsUserlist qualification ident
  deriving Generic

-- QualificationId is redundant here; but known due to external upload
LmsResult
  qualification     QualificationId
  ident             LmsIdent
  success           Day
  timestamp         UTCTime default=now()
  UniqueLmsResult   qualification ident
  deriving Generic