Roo Checkout Fix

Makes Deliveroo think you're on the app
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Wrap lines
// ==UserScript==
// @name         Roo Checkout Fix
// @description  Makes Deliveroo think you're on the app
// @match        https://deliveroo.co.uk/*
// @match        https://www.deliveroo.co.uk/*
// @run-at       document-start
// @version 0.0.1.20260609222641
// @namespace https://greasyfork.org/users/1611219
// ==/UserScript==

(() => {
  "use strict";

  const HEADER_NAME = "x-roo-client";
  const HEADER_VALUE = "consumer-app";

  const TARGET_METHODS = ["*"];

  const TARGET_URL_PATTERN = /deliveroo\.co\.uk/;

  function normaliseUrl(url) {
    try {
      return new URL(String(url), location.href).href;
    } catch {
      return String(url);
    }
  }

  function shouldModify(url, method) {
    const fullUrl = normaliseUrl(url);
    const upperMethod = String(method || "GET").toUpperCase();

    const methodMatches =
      TARGET_METHODS.includes("*") ||
      TARGET_METHODS.map(m => m.toUpperCase()).includes(upperMethod);

    return methodMatches && TARGET_URL_PATTERN.test(fullUrl);
  }

  function editHeaders(headersLike) {
    const headers = new Headers(headersLike || {});
    headers.set(HEADER_NAME, HEADER_VALUE);
    headers.set("x-roo-device", "ios");
    headers.set("x-roo-app-version", "3.0.0");
    return headers;
  }

  const originalFetch = window.fetch;

  window.fetch = function patchedFetch(input, init = {}) {
    let url;
    let method;
    let originalHeaders;

    if (input instanceof Request) {
      url = input.url;
      method = init.method || input.method || "GET";
      originalHeaders = init.headers || input.headers;
    } else {
      url = input;
      method = init.method || "GET";
      originalHeaders = init.headers;
    }

    if (!shouldModify(url, method)) {
      return originalFetch.call(this, input, init);
    }

    const newInit = {
      ...init,
      method,
      headers: editHeaders(originalHeaders)
    };

    if (input instanceof Request) {
      return originalFetch.call(this, new Request(input, newInit));
    }

    return originalFetch.call(this, input, newInit);
  };

  const originalOpen = XMLHttpRequest.prototype.open;
  const originalSend = XMLHttpRequest.prototype.send;
  const originalSetRequestHeader = XMLHttpRequest.prototype.setRequestHeader;

  XMLHttpRequest.prototype.open = function patchedOpen(method, url, ...rest) {
    this.__headerEditorUrl = url;
    this.__headerEditorMethod = method;
    this.__headerEditorShouldModify = shouldModify(url, method);
    return originalOpen.call(this, method, url, ...rest);
  };

  XMLHttpRequest.prototype.setRequestHeader = function patchedSetRequestHeader(name, value) {
    if (
      this.__headerEditorShouldModify &&
      String(name).toLowerCase() === HEADER_NAME.toLowerCase()
    ) {
      return;
    }
    return originalSetRequestHeader.call(this, name, value);
  };

  XMLHttpRequest.prototype.send = function patchedSend(body) {
    if (this.__headerEditorShouldModify) {
      originalSetRequestHeader.call(this, HEADER_NAME, HEADER_VALUE);
      originalSetRequestHeader.call(this, "x-roo-device", "ios");
      originalSetRequestHeader.call(this, "x-roo-app-version", "3.0.0");
    }
    return originalSend.call(this, body);
  };
})();