Queue image requests per source

If http protocol is h2 or newer, allow:
 - 5 requests per source
 - unlimited local source requests

src/lib/UrlUtil.ts

@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) Contributors to the Suwayomi project
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+import { SearchParam } from '@/base/Base.types.ts';
+
+export class UrlUtil {
+    static createParams(params: Record<SearchParam | string, string | null | undefined>): URLSearchParams {
+        const paramEntries = Object.entries(params).filter(
+            (entry): entry is [string, string] => typeof entry[1] === 'string',
+        );
+
+        return new URLSearchParams(paramEntries);
+    }
+
+    static createTabParam(tab: string | null | undefined): { [SearchParam.TAB]: string } {
+        return { ...this.createParams({ [SearchParam.TAB]: tab }).entries() } as unknown as {
+            [SearchParam.TAB]: string;
+        };
+    }
+
+    static createQueryParam(query: string | null | undefined): { [SearchParam.QUERY]: string } {
+        return { ...this.createParams({ [SearchParam.QUERY]: query }).entries() } as unknown as {
+            [SearchParam.QUERY]: string;
+        };
+    }
+
+    static addParams(path: string, params: Record<SearchParam | string, string | null | undefined>): string {
+        const urlParams = this.createParams(params).toString();
+
+        if (urlParams) {
+            return `${path}?${urlParams}`;
+        }
+
+        return path;
+    }
+
+    static addQueryParam(path: string, query: string | null | undefined): string {
+        return this.addParams(path, this.createQueryParam(query));
+    }
+}