Example domain store in mobx

domain-store.js

import {observable, autorun} from 'mobx';
import uuid from 'node-uuid';

export class TodoStore {
    authorStore;
    transportLayer;
    @observable todos = [];
    @observable isLoading = true;

    constructor(transportLayer, authorStore) {
        this.authorStore = authorStore; // Store that can resolve authors for us
        this.transportLayer = transportLayer; // Thing that can make server requests for us
        this.transportLayer.onReceiveTodoUpdate(updatedTodo => this.updateTodoFromServer(updatedTodo));
        this.loadTodos();
    }

    /**
     * Fetches all todo's from the server
     */
    loadTodos() {
        this.isLoading = true;
        this.transportLayer.fetchTodos().then(fetchedTodos => {
            todos.forEach(json => this.updateTodoFromServer(json));
            this.isLoading = false;
        });
    }

    /**
     * Update a todo with information from the server. Guarantees a todo
     * only exists once. Might either construct a new todo, update an existing one,
     * or remove an todo if it has been deleted on the server.
     */
    updateTodoFromServer(json) {
        var todo = this.todos.find(todo => todo.id === json.id);
        if (!todo) {
            todo = new Todo(this, json.id);
            this.todos.push(todo);
        }
        if (json.isDeleted) {
            this.removeTodo(todo);
        } else {
            todo.updateFromJson(json);
        }
    }

    /**
     * Creates a fresh todo on the client and server
     */
    createTodo() {
        var todo = new Todo(this);
        this.todos.push(todo);
        return todo;
    }

    /**
     * A todo was somehow deleted, clean it from the client memory
     */
    removeTodo(todo) {
        this.todos.splice(this.todos.indexOf(todo), 1);
        todo.dispose();
    }
}