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feat(privacy): the instance's side of private studysets (ADR 0019)

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- `content_key`, a synced table in the person's space, keeps their data keys
  sealed to their account (a private studyset's, their personal one);
  `learning_path_answer` gains `keyId` and `nonce` for answers in private
  studysets. Additive only, on the server and the device.
- Publishing refuses a private studyset, and a tree holding a private row
  (`PublishRefusal.private`); a private studyset elsewhere no longer breaks
  publishing a readable one. Encrypted tags are named as the device names
  them (`tagNames`): a name for a tag that isn't the person's, or an
  encrypted tag of the release without one, refuses it
  (`tagNamesMismatch`); a readable tag keeps its own name.
- The connector leaves private studysets out and says how many there are.
- The learner count reads no payload any more: Count me is kept by the
  instance (`counted_learner`) and the device reports which publications
  its copies come from (`learning_copy`, accepted only while counted, each
  report replacing the last); only the reporter's own studysets count.
  Deleting a person deletes both.
- An upload says whether its file is encrypted: only a readable one over
  20 MB is checked to be a PDF, and an encrypted one may be 4 KiB larger.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
This commit is contained in:
Tizian 「ティツィアーン」 2026-10-21 20:52:35 +02:00
commit a1c5ac3f86
Signed by: raisondetredev
GPG key ID: 07F6FCF405488B64
5 changed files with 35261 additions and 198 deletions
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apps/learn/halkyon_learn_client/lib/migrations/20261021184601197-private-studysets/definition.json Normal file
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apps/learn/halkyon_learn_client/lib/migrations/20261021184601197-private-studysets/definition_project.json Normal file
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apps/learn/halkyon_learn_client/lib/migrations/20261021184601197-private-studysets/migration.dart Normal file
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apps/learn/halkyon_learn_client/lib/migrations/20261021184601197-private-studysets/migration.json Normal file
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@ -0,0 +1,144 @@
{
"__className__": "serverpod.DatabaseMigration",
"actions": [
{
"__className__": "serverpod.DatabaseMigrationAction",
"type": "createTable",
"createTable": {
"__className__": "serverpod.TableDefinition",
"name": "content_key",
"dartName": "ContentKey",
"module": "halkyon_learn",
"schema": "public",
"columns": [
{
"__className__": "serverpod.ColumnDefinition",
"name": "id",
"fieldName": "id",
"columnType": 7,
"isNullable": false,
"columnDefault": "random_v7",
"dartType": "UuidValue?"
},
{
"__className__": "serverpod.ColumnDefinition",
"name": "spaceId",
"fieldName": "spaceId",
"columnType": 6,
"isNullable": true,
"dartType": "int?"
},
{
"__className__": "serverpod.ColumnDefinition",
"name": "dataKeyId",
"fieldName": "dataKeyId",
"columnType": 0,
"isNullable": false,
"dartType": "String"
},
{
"__className__": "serverpod.ColumnDefinition",
"name": "kind",
"fieldName": "kind",
"columnType": 0,
"isNullable": false,
"dartType": "String"
},
{
"__className__": "serverpod.ColumnDefinition",
"name": "studysetId",
"fieldName": "studysetId",
"columnType": 7,
"isNullable": true,
"dartType": "UuidValue?"
},
{
"__className__": "serverpod.ColumnDefinition",
"name": "sealedKey",
"fieldName": "sealedKey",
"columnType": 5,
"isNullable": false,
"dartType": "dart:typed_data:ByteData"
},
{
"__className__": "serverpod.ColumnDefinition",
"name": "createdAt",
"fieldName": "createdAt",
"columnType": 4,
"isNullable": false,
"dartType": "DateTime"
}
],
"foreignKeys": [
{
"__className__": "serverpod.ForeignKeyDefinition",
"constraintName": "content_key_fk_0",
"columns": [
"spaceId"
],
"referenceTable": "offline_sync_spaces",
"referenceTableSchema": "public",
"referenceColumns": [
"id"
],
"onUpdate": 3,
"onDelete": 4
}
],
"indexes": [
{
"__className__": "serverpod.IndexDefinition",
"indexName": "content_key_space_idx",
"elements": [
{
"__className__": "serverpod.IndexElementDefinition",
"type": 0,
"definition": "spaceId"
}
],
"type": "btree",
"isUnique": false,
"isPrimary": false
}
],
"managed": true
}
},
{
"__className__": "serverpod.DatabaseMigrationAction",
"type": "alterTable",
"alterTable": {
"__className__": "serverpod.TableMigration",
"name": "learning_path_answer",
"schema": "public",
"addColumns": [
{
"__className__": "serverpod.ColumnDefinition",
"name": "keyId",
"fieldName": "keyId",
"columnType": 0,
"isNullable": true,
"dartType": "String?"
},
{
"__className__": "serverpod.ColumnDefinition",
"name": "nonce",
"fieldName": "nonce",
"columnType": 5,
"isNullable": true,
"dartType": "dart:typed_data:ByteData?"
}
],
"deleteColumns": [],
"modifyColumns": [],
"addIndexes": [],
"deleteIndexes": [],
"addForeignKeys": [],
"deleteForeignKeys": [],
"warnings": []
}
}
],
"warnings": [],
"migrationApiVersion": 1
}

2
apps/learn/halkyon_learn_client/lib/migrations/migration_registry.dart
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@ -27,6 +27,7 @@ part '20261020211224692-email-code-purpose/migration.dart';
part '20261021100422048-session-ended-warning/migration.dart';
part '20261021110159867-second-factor-paths/migration.dart';
part '20261021134803749-reset-hold-outs/migration.dart';
part '20261021184601197-private-studysets/migration.dart';
/// Migration registry for the client-side database.
class MigrationRegistry {
@ -56,6 +57,7 @@ class MigrationRegistry {
_Migration20261021100422048_session_ended_warning(),
_Migration20261021110159867_second_factor_paths(),
_Migration20261021134803749_reset_hold_outs(),
_Migration20261021184601197_private_studysets(),
];
/// List of all client-side database migration versions.