this is take #2 of this PR https://github.com/tldraw/tldraw/pull/3745
As I look at LOD holistically and whether we have multiple sources when
working locally, I learned that our system used base64 encoding of
assets directly. Issue https://github.com/tldraw/tldraw/issues/3728
<img width="1350" alt="assetstore"
src="https://github.com/tldraw/tldraw/assets/469604/e7b41e29-6656-4d9b-b462-72d43b98f3f7">
The motivations and benefits are:
- store size: not having a huge base64 blobs injected in room data
- perf on loading snapshot: this helps with loading the room data more
quickly
- multiple sources: furthermore, if we do decide to have multiple
sources locally (for each asset), then we won't get a multiplicative
effect of even larger JSON blobs that have lots of base64 data in them
- encoding/decoding perf: this also saves the (slow) step of having to
base64 encode/decode our assets, we can just strictly with work with
blobs.
Todo:
- [x] decodes video and images
- [x] make sure it syncs to other tabs
- [x] make sure it syncs to other multiplayer room
- [x] fix tests
### Change Type
<!-- ❗ Please select a 'Scope' label ❗️ -->
- [x] `sdk` — Changes the tldraw SDK
- [ ] `dotcom` — Changes the tldraw.com web app
- [ ] `docs` — Changes to the documentation, examples, or templates.
- [ ] `vs code` — Changes to the vscode plugin
- [ ] `internal` — Does not affect user-facing stuff
<!-- ❗ Please select a 'Type' label ❗️ -->
- [ ] `bugfix` — Bug fix
- [ ] `feature` — New feature
- [x] `improvement` — Improving existing features
- [ ] `chore` — Updating dependencies, other boring stuff
- [ ] `galaxy brain` — Architectural changes
- [ ] `tests` — Changes to any test code
- [ ] `tools` — Changes to infrastructure, CI, internal scripts,
debugging tools, etc.
- [ ] `dunno` — I don't know
### Test Plan
1. Test the shit out of uploading/downloading video/image assets,
locally+multiplayer.
- [ ] Need to fix current tests and write new ones
### Release Notes
- Assets: store as reference to blob in indexedDB instead of storing
directly as base64 in the snapshot.
735161c4a8