@startuml
hide circle
skinparam nodesep 60

entity "note" {
  *id : uuid <<generated>>
  --
  *shortid : text
  alias : text
  *viewcount : number
  *ownerId : uuid <<FK user>>
  description: text
  title: text
}

entity "user" {
  *id : uuid <<generated>>
  --
  *userName : text
  *displayName : text
  *createdAt : date
  *updatedAt : date
  photo : text
  email : text
}

entity "auth_token"{
  *id : number <<generated>>
  --
  *userId : uuid
  *keyId: text
  *accessToken : text
  *label: text
  *createdAt: date
  lastUsed: number
  validUntil: number
}

entity "identity" {
  *id : number
  --
  *userId : uuid <<FK user>>
  ' Identifies the external login provider and is set in the config
  *providerName : text
  *syncSource : boolean
  *createdAt : date
  *updatedAt : date
  ' The unique identifier of a user from the login provider
  providerUserId : text
  ' Token used to access the OAuth provider in the users name. Can be NULL
  oauthAccessToken : text
  ' Password hash. Can be NULL
  passwordHash : text
}

entity "session" {
  *id : text
  --
  *expiredAt : number
  *json : text
}


entity "revision" {
  *id : number <<generated>>
  --
  *noteId : uuid <<FK note>>
  *content : text
  *patch : text
  *createdAt : date
  *length : number
}

entity "authorship" {
  *id : uuid <<generated>>
  --
  *userId : uuid <FK user>>
  *startPos : number
  *endPos : number
  *createdAt : date
  *updatedAt : date
}

entity "revision_authorship" {
  *revisionId : number <<FK revision>>
  *authorshipId : uuid <<FK authorship>>
}

entity "author_colors" {
  *noteId : uuid <<FK note>>
  *userId : uuid <<FK user>>
  --
  *color : text
}


entity "note_user_permission" {
  *userId : uuid <<FK user>>
  *noteId : uuid <<FK note>>
  --
  *canEdit : boolean
}

entity "group" {
  *id : number <<generated>>
  --
  *name : text <<unique>>
  *displayName : text
  ' Is set to denote a special group
  ' Special groups are used to map the old share settings like "everyone can edit"
  ' or "logged in users can view" to the group permission system
  *special : boolean
  }

entity "note_group_permission" {
  *groupId : number <<FK group>>
  *noteId : uuid <<FK note>>
  --
  *canEdit : boolean
}

entity "tag" {
  *id: number <<generated>>
  *name: text
}

entity "media_upload" {
  *id : text <<unique>>
  --
  *noteId : uuid <<FK note>>
  *userId : uuid <<FK user>>
  *backendType: text
  backendData: text
  *createdAt : date
}

user "1" -- "0..*" note: owner
user "1" -u- "1..*" identity
user "1" - "1..*" auth_token: authTokens
user "1" -l- "1..*" session
user "1" - "0..*" media_upload
user "0..*" -- "0..*" note
user "1" - "0..*" authorship

(user, note) . author_colors

revision "0..*" - "0..*" authorship
(revision, authorship) .. revision_authorship

media_upload "0..*"  -- "1" note
note "1" - "1..*" revision
note "0..*" -l- "0..*" tag
note "0..*" -- "0..*" group

user "0..*" -- "0..*" note
(user, note) . note_user_permission
(note, group) . note_group_permission

@enduml