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Aaron K Saunders
Aaron K Saunders

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Intro To MongoDB Realm with VueJS Ionic Framework And ViteJS, Refactoring Application State with Composition API

The MongoDB Realm Web SDK enables browser-based applications to access data stored in MongoDB Atlas and interact with MongoDB Realm services like Functions and authentication. The Web SDK supports both JavaScript and TypeScript applications.

In this short video we are refactoring application state related to Realm and Mongodb into a separate composition function instead of using something like vuex for state manager. We start with the code from the previous video

Currently, there is no solution for writing to the local database as a replacement for sqlite in an Ionic Application. It looks like some people have started to build a plugin, but didn't get too far.

We are building the application using Vuejs, it is being packaged and developed using ViteJS and the UI Components are from Ionic Framework

// realm-state.ts
import * as Realm from "realm-web";
import { computed, ref } from "vue";

const user = ref<any>(null);

// get app instance
const app = Realm.getApp("application-vue-1-afmqh");
user.value = app?.currentUser;

export const useAppState = () => {
  const isLoggedIn = computed(() => user.value !== null);

  /**
   *
   */
  const login = async (email: string, password: string) => {
    const credentials = Realm.Credentials.emailPassword(email, password);
    await app.logIn(credentials);

    // Refresh a user's custom data to make sure we have the
    // latest version
    await app?.currentUser?.refreshCustomData();

    //assign logged in user
    user.value = app?.currentUser;

    return true;
  };

  /**
   *
   * @returns
   */
  const logout = async () => {
    await app.currentUser?.logOut();
    //assign logged in user
    user.value = null;
    return true;
  };

  const createAccount = async ({
    email,
    password,
    first,
    last,
  }: {
    email: string;
    password: string;
    first: string;
    last: string;
  }) => {
    // Create user
    await app.emailPasswordAuth.registerUser(email, password);

    // Authenticate the user
    await app.logIn(Realm.Credentials.emailPassword(email, password));

    // save profile information
    const mongodb = app?.currentUser?.mongoClient("mongodb-atlas");
    const collection = mongodb?.db("vue-db1").collection("profile");

    const resp = await collection?.insertOne({
      userID: app?.currentUser?.id,
      first,
      last,
    });

    // Refresh a user's custom data to make sure we have the latest version
    await app?.currentUser?.refreshCustomData();

    //assign logged in user
    user.value = app?.currentUser;

    return app.currentUser;
  };

  return {
    isLoggedIn,
    user,
    // functions
    login,
    logout,
    createAccount,
  };
};
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