Resolve "Introduce PSR-4 autoloading"

Closes #12

classes/LoadModules.php

@@ -2,18 +2,8 @@
 
 namespace uib\ub\loadspeakr;
 
-use \uib\ub\loadspeakr\modules;
-use uib\ub\loadspeakr\modules\AdminModule;
-use uib\ub\loadspeakr\modules\ExportModule;
 use uib\ub\loadspeakr\modules\ModuleInterface;
-use uib\ub\loadspeakr\modules\RedirectModule;
-use uib\ub\loadspeakr\modules\ServiceModule;
-use uib\ub\loadspeakr\modules\SessionModule;
-use uib\ub\loadspeakr\modules\SparqlFilterModule;
-use uib\ub\loadspeakr\modules\StaticModule;
-use uib\ub\loadspeakr\modules\TypeModule;
 use uib\ub\loadspeakr\modules\UnknownModule;
-use uib\ub\loadspeakr\modules\UriModule;
 
 final class LoadModules
 {
@@ -26,12 +16,10 @@ final class LoadModules
 
   public function loadModule(string $uri): ModuleInterface
   {
-
-      $module = ucfirst($uri) . 'Module';
-      $className =  $this->loadClass($module);
+      $className =  $this->loadClass($uri);
       $unknown = new UnknownModule();
 
-      switch ($className) {
+      switch ($uri) {
           case 'admin':
               return new $className();
           case 'redirect':
@@ -60,13 +48,13 @@ final class LoadModules
     private function loadClass($module): string
     {
         if (!$this->moduleAvailable($module)) {
-            return '';
+            HTTPStatus::send500('Module: ' . $module . ' not found.');
         }
 
         $className = ucfirst($module) . 'Module';
 
-        if (class_exists($className)) {
-            return $className;
+        if (file_exists(__DIR__ . '/modules/' . $className . '.php')) {
+            return __NAMESPACE__ . '\\modules\\' . $className;
         }
 
         return '';