Collaboration service real time

[gycgabriel]

• Operational Transformations in Collaboration Service
• Add utils/shared-ot.ts
  • next.config.js: Enable experimental feature - external dir
  • Some scary warning appears here
• Fix frontend
  • remove debouncer
• Add cursor support, defaults to 0

Current design:

Client --> Server: OT + Cursor Server --> Client: Full text + Version number + Cursor

Version number incremented by Server, client should not increment because version number refers to previous version that is edited upon.

Client waits for:

• Acknowledgement from server of prev request
• Sync version (and text) from server before they can send the next update request

This ensures no conflicting versions and mix-ups.

[gycgabriel]

• Added cursor support
• Move Rooms db to Prisma
• Fix mergeOp to multiple versions from memory if previous version is very old for proper transforming

[ong6]

Lets merge after the demo tonight - to play safe