jitsi-meet/react/features/file-sharing/reducer.ts

import { UPDATE_CONFERENCE_METADATA } from '../base/conference/actionTypes';
import ReducerRegistry from '../base/redux/ReducerRegistry';

import {
    ADD_FILE,
    REMOVE_FILE,
    UPDATE_FILE_UPLOAD_PROGRESS
} from './actionTypes';
import { FILE_SHARING_ID } from './constants';
import { IFileMetadata } from './types';

export interface IFileSharingState {
    files: Map<string, IFileMetadata>;
}

const DEFAULT_STATE = {
    files: new Map<string, IFileMetadata>()
};

ReducerRegistry.register<IFileSharingState>('features/file-sharing',
(state = DEFAULT_STATE, action): IFileSharingState => {
    switch (action.type) {
    case ADD_FILE: {
        const newFiles = new Map(state.files);

        newFiles.set(action.file.fileId, action.file);

        return {
            files: newFiles
        };
    }

    case REMOVE_FILE: {
        const newFiles = new Map(state.files);

        newFiles.delete(action.fileId);

        return {
            files: newFiles
        };
    }

    case UPDATE_FILE_UPLOAD_PROGRESS: {
        const newFiles = new Map(state.files);
        const file = newFiles.get(action.fileId);

        if (file) {
            newFiles.set(action.fileId, { ...file, progress: action.progress });
        }

        return {
            files: newFiles
        };
    }

    case UPDATE_CONFERENCE_METADATA: {
        const { metadata } = action;
        const files = metadata?.[FILE_SHARING_ID];

        if (files) {
            const newFiles: Map<string, IFileMetadata> = new Map(Object.entries(files));

            return {
                files: new Map([
                    ...state.files,
                    ...newFiles
                ])
            };
        }

        return state;
    }

    default:
        return state;
    }
});