FEATURE: add registrators for settings form

app/Handlers/Registrators/SettingsExtensionRegistrator.php

@@ -0,0 +1,68 @@
+<?php
+namespace App\Handlers\Registrators;
+
+use App\Enumerations\Exceptions\EnumerationExistsException;
+use App\Handlers\Registrators\Items\SettingExtension;
+
+class SettingsExtensionRegistrator
+{
+    protected $settingsExtensions;
+
+    function __construct($app)
+    {
+        $this->settingsExtensions = [];
+    }
+
+    /**
+     * Method for registering new settings extensions/parts
+     *
+     * @param $sectionId
+     * @param $sectionName
+     * @param $sectionView
+     *
+     * @throws EnumerationExistsException
+     */
+    public function register($sectionId, $sectionName, $sectionView)
+    {
+        $this->checkIfRegistered($sectionId);
+
+        // register new extension
+        $this->settingsExtensions[$sectionId] = new SettingExtension($sectionId, $sectionName, $sectionView);
+    }
+
+    /**
+     * Registers new setting part - only as SettingExtension directly
+     *
+     * @param SettingExtension $extension
+     */
+    public function registerObject(SettingExtension $extension)
+    {
+        $this->checkIfRegistered($extension->getId());
+
+        $this->settingsExtensions[$extension->getId()] = $extension;
+    }
+
+    /**
+     * Getter for all registered extensions
+     *
+     * @return array
+     */
+    public function get()
+    {
+        return $this->settingsExtensions;
+    }
+
+    /**
+     * Checks if this section is not already defined
+     *
+     * @param $sectionId
+     *
+     * @throws EnumerationExistsException
+     */
+    private function checkIfRegistered($sectionId)
+    {
+        if (isset($this->settingsExtensions[$sectionId])) {
+            throw new EnumerationExistsException('Already existing key ' . $sectionId);
+        }
+    }
+}