<?php
//having trouble with this
if (isset($_POST['tag']) && $_POST['tag'] != '') {
$tag = $_POST['tag'];


require_once 'include/DB_Functions.php';
$db = new DB_Functions();

$response = array("tag" => $tag, "success" => 0, "error" => 0);

if ($tag == 'login') {

    $email = $_POST['email'];
    $password = $_POST['password'];

    $user = $db->getUserByEmailAndPassword($email, $password);
    if ($user != false) {

        $response["success"] = 1;
        $response["uid"] = $user["unique_id"];
        $response["user"]["name"] = $user["name"];
        $response["user"]["email"] = $user["email"];
        $response["user"]["created_at"] = $user["created_at"];
        $response["user"]["updated_at"] = $user["updated_at"];
        echo json_encode($response);
    } else {
        $response["error"] = 1;
        $response["error_msg"] = "Incorrect email or password!";
        echo json_encode($response);
    }
} else if ($tag == 'register') {

    $name = $_POST['name'];
    $email = $_POST['email'];
    $password = $_POST['password'];

    if ($db->isUserExisted($email)) {

        $response["error"] = 2;
        $response["error_msg"] = "User already existed";
        echo json_encode($response);
    } else {
        // store user
        $user = $db->storeUser($name, $email, $password);
        if ($user) {
            // user stored successfully
            $response["success"] = 1;
            $response["uid"] = $user["unique_id"];
            $response["user"]["name"] = $user["name"];
            $response["user"]["email"] = $user["email"];
            $response["user"]["created_at"] = $user["created_at"];
            $response["user"]["updated_at"] = $user["updated_at"];
            echo json_encode($response);
        }
        }
    } else {
    echo "Invalid Request";
     }
    } else {
    echo "Access Denied";
    //where the error is coming from
   }
   ?>