An example of LLM prompting for programming

Solution:

To implement the awareness layer feature, we can follow the guidelines mentioned in the problem statement and use the existing tech stack.

Task List:

1. Create a new component named “AwarenessInfo” to render cursor and name for remote users.

2. Create a new Konva layer to hold all the “AwarenessInfo” components.

3. Add the Konva layer to the main whiteboard component.

4. Create a new Redux slice to store the awareness information for remote users.

5. Create an encapsulated view model interface for the awareness Redux slice.

6. Implement the “AwarenessInfo” component to retrieve and display the awareness information for each remote user from the view model.

7. Implement a method in the encapsulated view model interface to update the awareness information for each remote user.

8. When a remote user changes the cursor location, dispatch the update method in the encapsulated view model interface to update the corresponding awareness information.

9. In the “AwarenessInfo” component, use the new location to animate the cursor change.

10. Write tests for the new “AwarenessInfo” component, including data-driven tests to ensure it properly displays the awareness information for all remote users.

11. Write tests for the encapsulated view model interface to ensure it properly updates the awareness information for remote users.

12. Write end-to-end Cypress tests to ensure the awareness layer is properly displayed and updated when remote users change their cursor location.

By following these tasks, we can implement the awareness layer feature in the online whiteboard system.

Sure, here’s a revised master plan with detailed component names, methods, and props:

Task List:

1. Create a new component named “AwarenessInfo” to render cursor and name for remote users. This component will receive props such as user name, cursor position, and online status.

2. Create a new Konva layer named “AwarenessLayer” to hold all the “AwarenessInfo” components.

3. Add the “AwarenessLayer” to the main whiteboard component.

4. Create a new Redux slice named “awareness” to store the awareness information for remote users.

5. Create an encapsulated view model interface named “AwarenessViewModel” for the “awareness” Redux slice. This interface will contain a method named “updateUserAwarenessInfo” to update the awareness information for each remote user.

6. Implement the “AwarenessInfo” component to retrieve and display the awareness information for each remote user from the view model. The component will use the “useSelector” hook to retrieve the relevant information.

7. Implement the “updateUserAwarenessInfo” method in the “AwarenessViewModel” interface to dispatch a Redux action to update the awareness information for each remote user. This method will be called by the “MainWhiteboard” component.

8. When a remote user changes the cursor location, dispatch the “updateUserAwarenessInfo” method in the “AwarenessViewModel” interface to update the corresponding awareness information.

9. In the “AwarenessInfo” component, use the new location to animate the cursor change. This can be accomplished using the Konva “Tween” animation.

10. Write tests for the new “AwarenessInfo” component, including data-driven tests to ensure it properly displays the awareness information for all remote users. The tests will be written using the React Testing Library.

11. Write tests for the encapsulated view model interface to ensure it properly updates the awareness information for remote users. These tests will use the Vitest framework.

12. Write end-to-end Cypress tests to ensure the awareness layer is properly displayed and updated when remote users change their cursor location. The tests will simulate user interactions with the whiteboard and verify the state of the “AwarenessLayer” and “AwarenessInfo” components.

Sure, here’s an example implementation of the tests for the AwarenessViewModel and the awareness slice without using redux-mock-store:

import { createAwarenessSlice, AwarenessState, updateAwareness } from './awarenessSlice';
import { AwarenessViewModel } from './AwarenessViewModel';

describe('AwarenessViewModel', () => {
  const mockDispatch = jest.fn();
  const initialState: AwarenessState = {
    users: {
      'user1': {
        name: 'User 1',
        cursorPosition: { x: 0, y: 0 },
        online: true,
      },
      'user2': {
        name: 'User 2',
        cursorPosition: { x: 100, y: 100 },
        online: true,
      },
    },
  };
  let viewModel: AwarenessViewModel;

  beforeEach(() => {
    viewModel = new AwarenessViewModel(initialState, mockDispatch);
  });

  describe('getUserNames', () => {
    it('returns the list of user names', () => {
      const names = viewModel.getUserNames();
      expect(names).toEqual(['User 1', 'User 2']);
    });
  });

  describe('getCursorPosition', () => {
    it('returns the cursor position for a given user ID', () => {
      const cursorPosition = viewModel.getCursorPosition('user1');
      expect(cursorPosition).toEqual({ x: 0, y: 0 });
    });

    it('returns undefined for an unknown user ID', () => {
      const cursorPosition = viewModel.getCursorPosition('unknown');
      expect(cursorPosition).toBeUndefined();
    });
  });

  describe('updateCursorPosition', () => {
    it('dispatches the updateAwareness action with the new cursor position', () => {
      viewModel.updateCursorPosition('user1', { x: 50, y: 50 });
      expect(mockDispatch).toHaveBeenCalledWith(updateAwareness({
        user: 'user1',
        cursorPosition: { x: 50, y: 50 },
      }));
    });
  });
});

And here’s an example implementation of the awarenessSlice without using redux-mock-store:

import { createSlice, PayloadAction } from '@reduxjs/toolkit';

export type CursorPosition = { x: number, y: number };

export type UserAwareness = {
  name: string;
  cursorPosition: CursorPosition;
  online: boolean;
};

export type AwarenessState = {
  users: Record<string, UserAwareness>;
};

const initialState: AwarenessState = {
  users: {},
};

const awarenessSlice = createSlice({
  name: 'awareness',
  initialState,
  reducers: {
    updateAwareness: (state, action: PayloadAction<{ user: string, cursorPosition: CursorPosition }>) => {
      const { user, cursorPosition } = action.payload;
      state.users[user].cursorPosition = cursorPosition;
    },
    setOnline: (state, action: PayloadAction<{ user: string, online: boolean }>) => {
      const { user, online } = action.payload;
      state.users[user].online = online;
    },
  },
});

export const { updateAwareness, setOnline } = awarenessSlice.actions;
export const awarenessReducer = awarenessSlice.reducer;

Note that since we’re not using redux-mock-store, we need to pass a mock dispatch function to the view model constructor, and in the test for updateCursorPosition we need to check that the correct action was dispatched using jest.fn().