tldraw/packages/tlschema
David Sheldrick f15a8797f0
Independent instance state persistence (#1493)
This PR 

- Removes UserDocumentRecordType
  - moving isSnapMode to user preferences
  - moving isGridMode and isPenMode to InstanceRecordType
  - deleting the other properties which are no longer needed.
 
- Creates a separate pipeline for persisting instance state.
  
Previously the instance state records were stored alongside the document
state records, and in order to load the state for a particular instance
(in our case, a particular tab) you needed to pass the 'instanceId'
prop. This prop ended up totally pervading the public API and people ran
into all kinds of issues with it, e.g. using the same instance id in
multiple editor instances.

There was also an issue whereby it was hard for us to clean up old
instance state so the idb table ended up bloating over time.
  
This PR makes it so that rather than passing an instanceId, you load the
instance state yourself while creating the store. It provides tools to
make that easy.

- Undoes the assumption that we might have more than one instance's
state in the store.

- Like `document`, `instance` now has a singleton id
`instance:instance`.
- Page state ids and camera ids are no longer random, but rather derive
from the page they belong to. This is like having a foreign primary key
in SQL databases. It's something i'd love to support fully as part of
the RecordType/Store api.

Tests to do

- [x] Test Migrations
- [x] Test Store.listen filtering
- [x] Make type sets in Store public and readonly
- [x] Test RecordType.createId
- [x] Test Instance state snapshot loading/exporting
- [x] Manual test File I/O
- [x] Manual test Vscode extension with multiple tabs
- [x] Audit usages of store.query
- [x] Audit usages of changed types: InstanceRecordType, 'instance',
InstancePageStateRecordType, 'instance_page_state', 'user_document',
'camera', CameraRecordType, InstancePresenceRecordType,
'instance_presence'
- [x] Test user preferences
- [x] Manual test isSnapMode and isGridMode and isPenMode
- [ ] Test indexedDb functions
- [x] Add instanceId stuff back


### Change Type

- [x] `major` — Breaking Change


### Test Plan

1. Add a step-by-step description of how to test your PR here.
2.

- [ ] Unit Tests
- [ ] Webdriver tests

### Release Notes

- Add a brief release note for your PR here.
2023-06-05 14:11:07 +00:00
..
src Independent instance state persistence (#1493) 2023-06-05 14:11:07 +00:00
api-extractor.json transfer-out: transfer out 2023-04-25 12:01:25 +01:00
api-report.md Independent instance state persistence (#1493) 2023-06-05 14:11:07 +00:00
CHANGELOG.md transfer-out: transfer out 2023-04-25 12:01:25 +01:00
LICENSE transfer-out: transfer out 2023-04-25 12:01:25 +01:00
package.json Rename tlstore to store (#1507) 2023-06-03 08:59:04 +00:00
README.md TLSchema readme (#1506) 2023-06-03 08:24:58 +00:00
tsconfig.json Rename tlstore to store (#1507) 2023-06-03 08:59:04 +00:00

@tldraw/tlschema

This package houses type definitions, schema migrations, and other type metadata for the tldraw editor's default persisted data.

There are three main kinds of types:

  • Record types

    These are root record types added to the Store class. They are defined in the ./src/records directory.

  • Shape types

    These are subtypes of the root TLShape record type. They allow specifying a unique name and custom props for a particular kind of shape.

  • Asset types

    These are subtypes of the root TLAsset record type. They allow specifying a unique name and custom props for a particular kind of asset.

Adding migrations

If you make any kind of change to any persisted data shape in this package, you must add migrations that are able to convert old versions to new versions, and vice-versa.

If you are making a change that affects the structure of a record, shape, or asset, update the migrations in the same file as the record, shape, or asset is defined.

If you are making a change that affects the structure of the store (e.g. renaming or deleting a type, consolidating two shape types into one, etc), add your changes in the migrations in schema.ts.

After making your changes, add a new version number, using a meaninful name. For example, if you add a new property to the TLShape type called ownerId that points to a user, you might do this:

In TLShape.ts

 const Versions = {
   RemoveSomeProp: 1,
+  AddOwnerId: 2,
 } as const

and then in the TLShape type

   x: number
   y: number
+  ownerId: ID<TLUser> | null
   props: Props
   parentId: ID<TLShape> | ID<TLPage>

and then adding a migration:

 export const shapeTypeMigrations = defineMigrations({
   currentVersion: Versions.Initial,
   firstVersion: Versions.Initial,
   migrators: {
+    [Versions.AddOwnerId]: {
+      // add ownerId property
+      up: (shape) => ({...shape, ownerId: null}),
+      // remove ownerId property
+      down: ({ownerId, ...shape}) => shape,
+    }
   },

After you've added your migration, make sure to add a test for it in src/migrations.test.ts. It will complain if you do not!

License

The source code in this repository (as well as our 2.0+ distributions and releases) are currently licensed under Apache-2.0. These licenses are subject to change in our upcoming 2.0 release. If you are planning to use tldraw in a commercial product, please reach out at hello@tldraw.com.