Endpoint class and remove type on $request param

Makes it easier to write phpunit tests and prototype traits without messing with the other endpoint classes

Author: valzargaming

src/VerifierServer/Endpoints/Endpoint.php

@@ -0,0 +1,25 @@
+<?php declare(strict_types=1);
+
+namespace VerifierServer\Endpoints;
+
+use React\Http\Message\Response;
+use Psr\Http\Message\ServerRequestInterface;
+
+class Endpoint implements EndpointInterface
+{
+    //use RequestTrait, MessageTrait, ServerRequestTrait;
+    use RequestParserTrait;
+
+    public function handle(
+        string $method,
+        $request,
+        int|string &$response,
+        array &$headers,
+        string &$body
+    ): void
+    {
+        $response = Response::STATUS_OK; // HTTP status code
+        $headers = ['Content-Type' => 'application/json']; // Response headers
+        $body = json_encode(['message' => 'Hello, World!']); // Response body
+    }
+}

src/VerifierServer/Endpoints/USPSEndpoint.php

@@ -15,10 +15,8 @@
  * such as GET, HEAD, and POST, and generates XML requests to interact
  * with the USPS API.
  */
-class USPSEndpoint implements EndpointInterface
+class USPSEndpoint extends Endpoint
 {
-    use RequestParserTrait;
-
     CONST BASE_URL  = 'http://production.shippingapis.com/ShippingAPITest.dll?API=ZipCodeLookup&XML=';
     CONST INFO      = 'Information provided by www.usps.com';
 
@@ -118,7 +116,7 @@ private function get(
         $params = $request instanceof ServerRequestInterface
             ? $request->getQueryParams()
             : (is_string($request)
-                ? self::getQueryParams($request)
+                ? $this->getQueryParams($request)
                 : []);
 
         $requiredFields = ['address2', 'city', 'state'];

src/VerifierServer/Endpoints/VerifiedEndpoint.php

@@ -44,10 +44,8 @@
  *
  * @package VerifierServer\Endpoints
  */
-class VerifiedEndpoint implements EndpointInterface
+class VerifiedEndpoint extends Endpoint
 {
-    use RequestParserTrait;
-
     public function __construct(private PersistentState &$state)
     {}
 
@@ -63,7 +61,7 @@ public function __construct(private PersistentState &$state)
      */
     public function handle(
         string $method,
-        ServerRequestInterface|string $request,
+        $request,
         int|string &$response, 
         array &$headers,
         string &$body,