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    if (fileName.startsWith('thumb_')) {
        console.log("the thumbnail is already created");
        return
    }

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exports.generateProfileThumbnail = functions.storage.object().onChange(event => {

    const data = event.data;

    const filePath = data.name;
    const fileName = filePath.split("/").pop();
    const tmpFilePath = "/tmp/" + fileName;
    const thumbFilePath = "/users/profileImages/thumb_" + fileName;

    const metageneration = data.metageneration;

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{
  "name": "functions",
  "description": "Cloud Functions for Firebase",
  "dependencies": {
    "@google-cloud/storage": "^1.2.0",
    "child-process-promise": "^2.2.1",
    "firebase-admin": "~4.2.1",
    "firebase-functions": "^0.5"
  },
  "private": true

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var functions = require('firebase-functions');
const gcs = require('@google-cloud/storage')({
    keyFilename: "chatme-30a53-firebase-adminsdk-spbrj-95b05f5e2e-1.json"
});
const spawn = require('child-process-promise').spawn;

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var functions = require('firebase-functions');
var admin = require('firebase-admin');
admin.initializeApp(functions.config().firebase);

exports.createUserAccount = functions.auth.user().onCreate(event => {
    const email = event.data.email;
    const uid = event.data.uid;
    const photoURL = event.data.photoURL || "";
    var username = event.data.displayName;

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  /**
     * a method to handle the state of the auth widgets, it displays a progress bar while the
     * firebase authentication network process
     * @param state if true the progress bar will be shown
     * @param view  holds the auth widget to hide or dispaly
     */
    private void showProgress(boolean state,View view){
        mProgressBarContainer =view.findViewById(R.id.progress_bar_container);
        mEmailPasswordAuthContainer = view.findViewById(R.id.email_password_auth_container);
        if(state) {

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  /**
     * a public method to handel the facebook authentication
     *
     * @param token holds the user Facebook accessToken
     */
    public void handleFacebookAccessToken(AccessToken token) {

        AuthCredential credential = FacebookAuthProvider.getCredential(token.getToken());
        FirebaseUtils.auth.signInWithCredential(credential)
                .addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {

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 /**
     * a public method to handel the user sign up event from the auth fragment
     *
     * @param email a string holds the user email address
     * @param password a string holds the user text password
     * @param view a view holds the auth widgets to hide
     *
     *
     */
    public void handleSignUp(String email, String password, final View view){

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/**
     * a public method to handel the user sign in event from the auth fragment
     *
     * @param email a string holds the user email address
     * @param password a string holds the user text password
     * @param view a view holds the auth widgets to hide
     */
    public void handleSignIn(String email, String password, final View view){
        showProgress(true,view);
        FirebaseUtils.auth.signInWithEmailAndPassword(email, password).addOnCompleteListener(

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@Override
    public void onAnimationStart(Animation animation) {
        
    }

    @Override
    public void onAnimationEnd(Animation animation) {
        new Handler().postDelayed(new Runnable() {
            @Override
            public void run() {