IV. DEVELOPMENT

We developed parts of the app using Ionic and Angular with features like Firebase Authentication and web scraping. Here are some key insights from the process.

Firebase Authentication (OTP)

For secure user registration, we used phone number OTP verification. This ensures users are authenticated securely via a one-time password sent to their phone. Once the OTP is verified, user data is securely saved.

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

        

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;
}