Start writing GraphQL schema

Co-authored-by: Elias Schriefer

noise.graphql

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+schema {
+    query: Query
+}
+
+type Query {
+    users: [User!]!
+}
+
+# Hopefully provided by juniper and chrono
+scalar DateTimeUtc
+# else it's probably DateTime
+# scalar DateTime
+
+# Provided by juniper and url
+scalar Url
+
+type User {
+    id: ID!
+    userName: String!
+    displayName: String
+    activated: Boolean!
+    created: DateTimeUtc!
+    lastOnline: DateTimeUtc
+    preferences: UserPreferences!
+}
+
+# All account preferences for a single user
+type UserPreferences {
+    privacyPreference: PrivacyPreference!
+    # TODO: notifications
+    notificationPreference: NotificationPreference!
+    # TODO: external servers
+    # TODO: security
+}
+
+type PrivacyPreference {
+    # Discovery on other servers
+    discovery: RestrictionPolicy!
+    discoveryUserLimit: [String!]
+    discoveryServerLimit: [Url!]
+
+    # Last seen online
+    lastSeen: RestrictionPolicy!
+    lastSeenUserLimit: [String!]
+    lastSeenServerLimit: [Url!]
+    # For enabled users/servers: Only give vague indications
+    # e.g. recently, a long time ago
+    lastSeenCourse: Boolean!
+
+    # Describing informational text regarding the user
+    info: RestrictionPolicy!
+    infoUserLimit: [String!]
+    infoServerLimit: [Url!]
+
+    # One-purpose-passwords
+    # TODO: move to security
+    accountTokens: [ID!]!
+}
+
+type NotificationPreference {
+    lockDetails: Boolean!
+    doNotDisturb: Boolean!
+}
+
+# Everyone = Including all = Excluding none
+# None = Including none = Excluding all
+enum RestrictionPolicy {
+    Everyone
+    Excluding
+    Including
+    None
+}