UserController

<?php

namespace Controllers;

use Exceptions\RestParameterException;
use Models\User;

class UserController extends ControllerBase
{

    public function getUserById()
    {
        $response = $this->response;
        try {
            $id = $this->getJsonParameterFromPost('user_id', 'int', true);

            $user = User::findFirst(
                [
                    "id = :id:",
                    "bind" => [
                        "id" => $id
                    ]
                ]
            );

            if ($user) {
                $response->setStatusCode(200, "OK");
                $response->setJsonContent($user);
            } else {
                $response->setStatusCode(404, "Not found");
                $response->setJsonContent(array('status' => 'ERROR', 'messages' => "User you are looking for doesn't exist"));
            }
        } catch (\Exception $e) {
            $response = $this->getExceptionResponse($e);
        } finally {
            return $response;
        }
    }

    public function getUsersByLink(){
        $response = $this->response;
        try {
            $link = $this->getJsonParameterFromPost('link', 'string', true);

            $users = User::find(
                [
                    "link = :link:",
                    "bind" => [
                        "link" => $link
                    ]
                ]
            );

            if (sizeof($users)>0) {
                $response->setStatusCode(200, "OK");
                $response->setJsonContent($users);
            } else {
                $response->setStatusCode(404, "Not found");
                $response->setJsonContent(array('status' => 'ERROR', 'messages' => "Users you are looking for with that link don't exist"));
            }
        } catch (\Exception $e) {
            $response = $this->getExceptionResponse($e);
        } finally {
            return $response;
        }
    }

    public function registerNewUser()
    {
        $response = $this->response;
        try {
            $name = $this->getJsonParameterFromPost('name', 'string', true);
            $university_id = $this->getJsonParameterFromPost('university_id', 'int', true);
            $link = $this->getJsonParameterFromPost('link', 'string', true);

            $user = User::findFirst(
                [
                    "name = :name: AND link=:link:",
                    "bind" => [
                        "name" => $name,
                        "link" => $link
                    ]
                ]
            );

            if ($user) {
                $response->setStatusCode(409, "Conflict");
                $response->setJsonContent(array('status' => 'ERROR', 'messages' => 'Such user already exists!'));
                return;
            }

            $user = new User();
            $user->name = $name;
            $user->link = $link;
            $user->university_id = $university_id;

            if ($user->save()) {
                $response->setStatusCode(201, "Created");
                $response->setJsonContent(array(
                    'status' => 'SUCCESS',
                    'messages' => 'Successfully registered a new user!',
                    'user'=>$user));
            } else {
                $response->setStatusCode(500, "Unexpected error");
                $response->setJsonContent(array('status' => 'ERROR', 'messages' => 'Something went wrong, user not registered!'));
            }
        } catch (\Exception $e) {
            $response = $this->getExceptionResponse($e);
        } finally {
            return $response;
        }
    }

}