Firehouse

Documents

• Sample/Exmaple Project. See this project for example.

Requirements

• firebase and @angular/fire must be installed on the project.
• chance is optional for testing.
• AngularFire must be initialized on app module like below

@NgModule({
  imports: [
    ...
    AngularFireModule.initializeApp( /* ... firebase config ... */ ),
    AngularFirestoreModule,
    AngularFireAuthModule
    ...
  ],
  ...
})
export class AppModule {}

Sample code

How to get user data

• You need to get data when the user auth changed.

this.firehouse.auth.onAuthStateChanged(async () => {
  if (this.firehouse.isLoggedIn) {
    const re = await this.firehouse.userGet(this.firehouse.currentUser.uid).then(user => {
      this.form = user;
      this.a.render();
    }).catch(e => e);
    if (this.firehouse.isError(re)) {
      this.a.error(re);
    }
  }
});

User registration

• When you put user registration form and profile update form in one componet(tempalte),
  • use the following code.

load = false;
subscriber;
form = {};
constructor(
  public a: AppService,
  public firehouse: FirehouseService
) {
  this.subscriber = this.firehouse.auth.onAuthStateChanged(async user => {
    if (this.load) {
      return;
    }
    this.load = true;
    if (user) {
      const re = await this.firehouse.userGet(this.firehouse.currentUser.uid).catch(e => e);
      if (this.firehouse.isError(re)) {
        this.a.error(re);
        return;
      }
      this.form = re;
      this.a.render();
    }
  });
}

ngOnDestroy() {
  if (this.subscriber) {
    this.subscriber(); // unsubscribe
    this.subscriber = null;
  }
}
 async onSubmit() {
    if (this.firehouse.isLoggedIn) {
      const re = await this.firehouse.userUpdate(this.form).catch(e => e);
      if (this.firehouse.isError(re)) {
        this.a.error(re);
      } else {
        // profile upload success
      }

    } else {
      const re = await this.firehouse.userRegister(this.form).catch(e => e);
      if (re.code === void 0) {
        // do something after registration
      } else {
        this.a.error(re);
      }
    }
    return false;
  }

Common pitfalls

• The following shows a common pitfall you may be trapped.
  • It first creates account with email/password
  • And inside the firehouse.userRegister, it will create user profile documentation under /users collection.
  • Before it creates a doc undre /users, it will try to read it because it listens the user staet change.
  • So, it reads the user data before it exists.
  • That's why you get premission-denied error.

this.f.fireAuth.auth.onAuthStateChanged( async () => {
  console.log(`auth.onAuthStateChanged() happens right after email/password registration before updated /users collection`);
  if ( this.f.isLoggedIn ) {
    console.log(`Since the user has logged in already
                  and it is trying to get user data from /users collection which is not exists yet.`);
    const re = await this.f.userGet( this.f.currentUser.uid ).then( user => {
      this.form = user;
      this.a.render();
      }).catch( e => e);
      if ( this.f.isError(re) ) {
        console.log(`That's why you get permission-denied error here!`);
        this.a.error(re);
      }
  }

/**
 * going to register
 */
  const re = await this.f.userRegister( this.form ).catch(e => e);
if ( re.code === void 0 ) {
  // this.a.alert('Register success');
  // this.a.openHome();
} else {
  this.a.error( re );
}
});