model

Model

The business data model of the whiteboard consists of the following entities:

• A room: Contains whiteboards and widgets.
• A widget: Displays a single whiteboard at a time, but users can switch between which whiteboard is displayed.
• A whiteboard: A collection of slides that belong to each other.
• A slide: A canvas that the user draws multiple elements on.
• An element: A shape that has properties like position, color, … that is placed on a slide.

┌────────────────────┐
│                    │
│  Room              ├────────────┐
│                    │   1:n      │
└───┬────────────────┘            │
    │                             │
    │ 1:n                         │
    ▼                             ▼
┌────────────────────┐        ┌─────────────────────┐
│                    │        │                     │
│  Widget            ├───────►│  Whiteboard         │
│                    │ n:0..1 │                     │
└────────────────────┘        └───┬─────────────────┘
                                  │
                                  │  1:n
                                  ▼
                              ┌─────────────────────┐
                              │                     │
                              │  Slide              │
                              │                     │
                              └───┬─────────────────┘
                                  │
                                  │  1:n
                                  ▼
                              ┌─────────────────────┐
                              │                     │
                              │  Element            │
                              │                     │
                              └─────────────────────┘

Due to the architecture of the whiteboard, we have different communication and storage protocols. Each of these protocols uses its own set of models:

• CRDT Documents
• Matrix Events
• Real-Time WebRTC Messages
• Export Data Format