CustomerRewardsRESTAPI/Controller/API/CustomerController.php

<?php
header("Content-Type: application/json");
/*
 * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
 * Click nbfs://nbhost/SystemFileSystem/Templates/Scripting/PHPClass.php to edit this template
 */

/**
 * Description of CustomerController
 *
 * @author SCTN4
 * http://localhost:8000/index.php/customer/process/insert?name=Mike%20Howard&email=sctn4elk@msn.com&phone=208-841-4159&birthday=05/07/1965&loyalty=1&city=Winnsboro&state=TX&zip=75494
 * http://localhost:8000/index.php/customer/process/select?limit=20
 */
class CustomerController extends BaseController{
/** 
* "/customer/list" Endpoint - Get list of users 
*/
    private $customerModel;
    private $requestMethod;
    private $arrQueryStringParams;
    private $strErrorDesc;
    private $strErrorHeader;
	
    public $action;
	
    function __construct() {
        $this->customerModel = new CustomerModel();
        $this->requestMethod = $this->getServerRequestMethod();
        $this->arrQueryStringParams = $this->getQueryStringParams();
    }
    
    public function processAction() {
        $this->strErrorDesc = '';
        try {
            switch($this->action) {
                case "select":
                    $response = $this->selectAction();
                break;
                       
                    case "insert":
                        $response = $this->insertCustomer();
                    break;

                    case "update":
                        $response = $this->updateCustomer();
                    break;

                    case "delete":
                        $response = $this->deleteCustomer();
                    break;
                
                    default:
                        $strErrorDesc = 'Controller Method not supported for processAction: ' . $this->action;
                        $strErrorHeader = 'HTTP/1.1 422 Unprocessable Entity';
                    break;
                }
        
                $responseData = json_encode($response);
            } catch (Error $e) {
                $this->strErrorDesc = $e->getMessage().' Something went wrong in processAction! Please contact support.';
                $this->strErrorHeader = 'HTTP/1.1 500 Internal Server Error';
            }
        
        // send output 
        if (!$strErrorDesc) {
            $this->sendOutput(
                $responseData,
                array('Content-Type: application/json', 'HTTP/1.1 200 OK')
            );
        } else {
            $this->sendOutput(json_encode(array('error' => $strErrorDesc)), 
                array('Content-Type: application/json', $strErrorHeader)
            );
        }
    }
    
    private function selectAction(){
        if ($this->checkRequestType('GET') == 'false') {
            $this->strErrorDesc = 'Request Method not supported for processAction';
            $this->strErrorHeader = 'HTTP/1.1 422 Unprocessable Request';
            return;
        }
        if (isset($this->arrQueryStringParams['customer_id'])) {
           $response = $this->selectByIdAction();
        } else {
            $this->customerModel->limit = 10;
            
            if (isset($this->arrQueryStringParams['limit'])) {
                $this->customerModel->limit = $this->arrQueryStringParams['limit'];
            }
            $response = $this->customerModel->findAllCustomers();
            unset($this->customerModel->limit);
        }
        return $response;
    }
    
    private function selectByIdAction(){
        if (isset($this->arrQueryStringParams['customer_id'])) {
            $this->customerModel->customerId = $this->arrQueryStringParams['customer_id'];
            $response = $this->customerModel->findByCustomerId();
            unset($this->customerModel->customerId);
        } else {
            return $this->notFoundResponse();
        }
        
        return $response;
    }
    
    private function insertCustomer()
    {
        if ($this->checkRequestType('POST') == 'false') {
            $this->strErrorDesc = 'Request Method not supported for processAction';
            $this->strErrorHeader = 'HTTP/1.1 422 Unprocessable Request';
            return;
        }
        // reads the raw POST data and returns it as a string. 
        $jsonPayload = (array) json_decode(file_get_contents('php://input'), TRUE);
        if (! $this->validatePerson($jsonPayload)) {
            return $this->unprocessableEntityResponse();
        }
        $response = $this->customerModel->insertCustomer($jsonPayload);
        return $response;
    }

    private function updateCustomer()
    {
        if ($this->checkRequestType('PUT') == 'false') {
            $this->strErrorDesc = 'Request Method not supported for processAction';
            $this->strErrorHeader = 'HTTP/1.1 422 Unprocessable Request';
            return;
        }
	$jsonPayload = file_get_contents('php://input');
	$input = json_decode($jsonPayload);

        if (! $this->validatePerson($input)) {
            return $this->unprocessableEntityResponse();
        }
			
        if ($input->customer_id != null) {
            $this->customerModel->customerId = $input->customer_id;
            $result = $this->customerModel->findByCustomerId();
            if (! $result) {
                return $this->notFoundResponse();
            }
            
            $response = $this->customerModel->updateCustomer($input);
            unset($this->customerModel->customerId);
        } else {
            return $this->notFoundResponse();
        }
        return $response;
    }

    private function deleteCustomer()
    {
        if ($this->checkRequestType('DELETE') == 'false') {
            $this->strErrorDesc = 'Request Method not supported for processAction';
            $this->strErrorHeader = 'HTTP/1.1 422 Unprocessable Request';
            return;
        }
        if (isset($this->arrQueryStringParams['customer_id'])) {
            $this->customerModel->customerId = $this->arrQueryStringParams['customer_id'];
            $result = $this->customerModel->findByCustomerId();
            if (! $result) {
                return $this->notFoundResponse();
            }
            $response = $this->customerModel->deleteCustomer();
            unset($this->customerModel->customerId);
        } else {
            return $this->notFoundResponse();
        }
        return $response;
    }

    private function checkRequestType($request)
    {
        $response = 'false';
        if (strtoupper($this->requestMethod) == $request) {
            $response = 'true';
        }
        return $response;
    }
    
    private function validatePerson($input)
    {
        $validtion = false;
        if($input->customer_name_first != null){
            $validtion = true;
            if($input->customer_name_last == null) {
                $validtion = false;
            }
        }
        return $validtion;
    }

    private function unprocessableEntityResponse()
    {
        $response['status_code_header'] = 'HTTP/1.1 422 Unprocessable Payload';
        $response['body'] = json_encode([
            'error' => 'Invalid input'
        ]);
        $this->strErrorDesc = 'Unprocessable Payload';
        $this->strErrorHeader = 'HTTP/1.1 422 Unprocessable Payload';
        return $response;
    }

    private function notFoundResponse()
    {
        $response['status_code_header'] = 'HTTP/1.1 404 Entity Not Found';
        $response['body'] = null;
        $this->strErrorDesc = 'Request Entity Not Found';
        $this->strErrorHeader = 'HTTP/1.1 422 Entity Not Found';
        return $response;
    }
}