Add feed refreshing stubs

lib/REST/Miniflux/V1.php

@@ -1161,6 +1161,22 @@ class V1 extends \JKingWeb\Arsse\REST\AbstractHandler {
         return new EmptyResponse(204);
     }
 
+    protected function refreshFeed(array $path): ResponseInterface {
+        // NOTE: This is a no-op; we simply check that the feed exists
+        try {
+            Arsse::$db->subscriptionPropertiesGet(Arsse::$user->id, (int) $path[1]);
+        } catch (ExceptionInput $e) {
+            return new ErrorResponse("404", 404);
+        }
+        return new EmptyResponse(204);
+    }
+
+    protected function refreshAllFeeds(): ResponseInterface {
+        // NOTE: This is a no-op
+        // It could be implemented, but the need is considered low since we use a dynamic schedule always
+        return new EmptyResponse(204);
+    }
+
     public static function tokenGenerate(string $user, string $label): string {
         // Miniflux produces tokenss in base64url alphabet
         $t = str_replace(["+", "/"], ["-", "_"], base64_encode(random_bytes(self::TOKEN_LENGTH)));

tests/cases/REST/Miniflux/TestV1.php

@@ -921,4 +921,20 @@ class TestV1 extends \JKingWeb\Arsse\Test\AbstractTest {
             [new ExceptionInput("subjectMissing"), null,  new ErrorResponse("404", 404)],
         ];
     }
+
+    public function testRefreshAFeed(): void {
+        \Phake::when(Arsse::$db)->subscriptionPropertiesGet->thenReturn([]);
+        $this->assertMessage(new EmptyResponse(204), $this->req("PUT", "/feeds/47/refresh"));
+        \Phake::verify(Arsse::$db)->subscriptionPropertiesGet(Arsse::$user->id, 47);
+    }
+
+    public function testRefreshAMissingFeed(): void {
+        \Phake::when(Arsse::$db)->subscriptionPropertiesGet->thenThrow(new ExceptionInput("subjectMissing"));
+        $this->assertMessage(new ErrorResponse("404", 404), $this->req("PUT", "/feeds/2112/refresh"));
+        \Phake::verify(Arsse::$db)->subscriptionPropertiesGet(Arsse::$user->id, 2112);
+    }
+
+    public function testRefreshAllFeeds(): void {
+        $this->assertMessage(new EmptyResponse(204), $this->req("PUT", "/feeds/refresh"));
+    }
 }