Added proper DI and autoloading to make things simpler for the actual logic'

api/DependencyManager.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace Core;
+
+// Responsible for loading in all necessary classes. AKA a poor man's DI solution.
+use BusinessLogic\Category\CategoryRetriever;
+use DataAccess\CategoryGateway;
+
+class DependencyManager {
+    public $get;
+
+    function __construct() {
+        $this->get = array();
+
+        $this->get['CategoryGateway'] = new CategoryGateway();
+        $this->get['CategoryRetriever'] = new CategoryRetriever($this->get['CategoryGateway']);
+    }
+}

api/autoload.php

@@ -0,0 +1,25 @@
+<?php
+
+// Responsible for loading in all necessary scripts and kicking off the DependencyManager
+
+define('IN_SCRIPT', 1);
+define('HESK_PATH', '../');
+require_once(__DIR__ . '/core/common.php');
+require_once(__DIR__ . '/Link.php');
+require_once(__DIR__ . '/../hesk_settings.inc.php');
+
+// FILES
+require_once(__DIR__ . '/http_response_code.php');
+require_once(__DIR__ . '/dao/category/CategoryGateway.php');
+require_once(__DIR__ . '/businesslogic/category/CategoryRetriever.php');
+require_once(__DIR__ . '/businesslogic/category/Category.php');
+require_once(__DIR__ . '/controllers/CategoryController.php');
+
+hesk_load_api_database_functions();
+
+// HESK files that require database access
+require_once(__DIR__ . '/../inc/custom_fields.inc.php');
+
+require_once(__DIR__ . '/DependencyManager.php');
+
+$applicationContext = new \Core\DependencyManager();

api/businesslogic/ValidationException.php

@@ -9,7 +9,7 @@ class ValidationException extends Exception {
 
     /**
      * ValidationException constructor.
-     * @param ValidationModel $validationModel The validatio model
+     * @param ValidationModel $validationModel The validation model
      * @throws Exception If the validationModel's errorKeys is empty
      */
     function __construct($validationModel) {

api/businesslogic/category/CategoryRetriever.php

@@ -11,9 +11,16 @@ namespace BusinessLogic\Category;
 use DataAccess\CategoryGateway;
 
 class CategoryRetriever {
-    static function get_all_categories($hesk_settings) {
-        require_once(__DIR__ . '/../../dao/category/CategoryGateway.php');
+    /**
+     * @var CategoryGateway
+     */
+    private $categoryGateway;
 
-        return CategoryGateway::getAllCategories($hesk_settings);
+    function __construct($categoryGateway) {
+        $this->categoryGateway = $categoryGateway;
+    }
+
+    function getAllCategories($hesk_settings) {
+        return $this->categoryGateway->getAllCategories($hesk_settings);
     }
 }

api/controllers/CategoryController.php

@@ -1,10 +1,4 @@
 <?php
-/**
- * Created by PhpStorm.
- * User: user
- * Date: 1/16/17
- * Time: 10:12 PM
- */
 
 namespace Controllers\Category;
 
@@ -21,9 +15,11 @@ class CategoryController {
     }
 
     private static function getAllCategories() {
-        global $hesk_settings;
-        require_once(__DIR__ . '/../businesslogic/category/CategoryRetriever.php');
+        global $hesk_settings, $applicationContext;
 
-        return CategoryRetriever::get_all_categories($hesk_settings);
+        /* @var $categoryRetriever CategoryRetriever */
+        $categoryRetriever = $applicationContext->get['CategoryRetriever'];
+
+        return $categoryRetriever->getAllCategories($hesk_settings);
     }
 }

api/core/json_error.php

@@ -1,6 +1,6 @@
 <?php
 
-function print_error($title, $message) {
+function print_error($title, $message, $response_code = 500) {
     require_once(__DIR__ . '/output.php');
 
     $error = array();
@@ -8,6 +8,6 @@ function print_error($title, $message) {
     $error['title'] = $title;
     $error['message'] = $message;
 
-    print output($error);
+    print output($error, $response_code);
     return;
 }

api/core/output.php

@@ -1,7 +1,7 @@
 <?php
 
 function output($data, $status_code = 200) {
+    http_response_code($status_code);
     header('Content-Type: application/json');
     print json_encode($data);
-    return http_response_code($status_code);
 }

api/dao/category/CategoryGateway.php

@@ -12,9 +12,7 @@ use BusinessObjects\Category;
 use Exception;
 
 class CategoryGateway {
-    static function getAllCategories($hesk_settings) {
-        require_once(__DIR__ . '/../../businesslogic/category/Category.php');
-
+    function getAllCategories($hesk_settings) {
         if (!function_exists('hesk_dbConnect')) {
             throw new Exception('Database not loaded!');
         }

api/http_response_code.php

@@ -0,0 +1,15 @@
+<?php
+
+// For 4.3.0 <= PHP <= 5.4.0
+if (function_exists('http_response_code') === false) {
+    function http_response_code($newcode = NULL) {
+        static $code = 200;
+        if ($newcode !== NULL) {
+            header('X-PHP-Response-Code: ' . $newcode, true, $newcode);
+            if (!headers_sent()) {
+                $code = $newcode;
+            }
+        }
+        return $code;
+    }
+}

api/index.php

@@ -1,17 +1,6 @@
 <?php
-// Router: handles all REST requests to go to their proper place. Common dependency loading also happens here
-define('IN_SCRIPT', 1);
-define('HESK_PATH', '../');
-require_once(__DIR__ . '/core/common.php');
-require_once(__DIR__ . '/Link.php');
-require_once(__DIR__ . '/../hesk_settings.inc.php');
-
-// Controllers
-require_once(__DIR__ . '/controllers/CategoryController.php');
-hesk_load_api_database_functions();
-require_once(__DIR__ . '/../inc/custom_fields.inc.php');
-
 // Properly handle error logging, as well as a fatal error workaround
+require_once(__DIR__ . '/autoload.php');
 error_reporting(0);
 set_error_handler('errorHandler');
 register_shutdown_function('fatalErrorShutdownHandler');
@@ -45,5 +34,7 @@ Link::all(array(
     // Categories
     '/v1/categories' => '\Controllers\Category\CategoryController::printAllCategories',
     '/v1/categories/{i}' => '\Controllers\Category\CategoryController',
+
+    // Any URL that doesn't match goes to the 404 handler
     '404' => 'handle404'
 ));