IV. DEVELOPMENT

We developed SafeRated using Ionic and Angular, implementing critical features like Firebase Authentication and web scraping to enhance security and credibility. Here are a few key insights from the app development process.

Firebase Authentication (OTP)

For secure user registration, we used Firebase Authentication with phone number OTP verification. This ensures users are authenticated securely via a one-time password sent to their phone.

firebase.auth().signInWithPhoneNumber(this.phoneNumber, this.recaptchaVerifier)
    .then((confirmationResult) => {
        this.confirmationResult = confirmationResult;
    });

        

Once the OTP is verified, user data is securely saved:

this.confirmationResult.confirm(this.otp).then(() => {
    this.userService.saveUserData(this.phoneNumber, this.username);
});

        

Web Scraping for Trustworthiness

To verify user credibility, we integrated ScraperAPI, which scrapes public data from platforms like LinkedIn. This data helps assign a trust level to users based on their online presence.

fetchSearchResults() {
    this.apiService.getResults(this.username).subscribe(response => {
        this.results = response;
        this.updateTrustLevel();
    });
}

updateTrustLevel() {
    if (this.results.length > 50) this.trustLevel = 5;
    else if (this.results.length > 20) this.trustLevel = 4;
}