gecko-dev/browser/base/content/newInstallPage.js

/* 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 http://mozilla.org/MPL/2.0/. */

const PARAMS = new URL(location).searchParams;
const ENTRYPOINT = "new-install-page";
const SOURCE = `new-install-page-${PARAMS.get("channel")}`;
const CAMPAIGN = "dedicated-profiles";
const ENDPOINT = PARAMS.get("endpoint");
const CONTEXT = "fx_desktop_v3";

function appendAccountsParams(url) {
  url.searchParams.set("entrypoint", ENTRYPOINT);
  url.searchParams.set("utm_source", SOURCE);
  url.searchParams.set("utm_campaign", CAMPAIGN);
}

function appendParams(url, params) {
  appendAccountsParams(url);

  for (let [key, value] of Object.entries(params)) {
    url.searchParams.set(key, value);
  }
}

async function requestFlowMetrics() {
  let requestURL = new URL(`${ENDPOINT}metrics-flow`);
  appendParams(requestURL, {
    "form_type": "email",
  });

  let response = await fetch(requestURL, { credentials: "omit" });
  if (response.status === 200) {
    return response.json();
  }

  throw new Error(`Failed to retrieve metrics: ${response.status}`);
}

async function submitForm(event) {
  // We never want to submit the form.
  event.preventDefault();

  let input = document.getElementById("sync-input");
  input.disabled = true;
  document.getElementById("sync-button").disabled = true;

  let { flowId, flowBeginTime } = await metrics;

  let requestURL = new URL(ENDPOINT);
  appendParams(requestURL, {
    "service": "sync",
    "action": "email",
    "context": CONTEXT,
    "utm_campaign": CAMPAIGN,
    "email": input.value,
    "flow_id": flowId,
    "flow_begin_time": flowBeginTime,
  });

  window.open(requestURL, "_blank", "noopener");
}

// This must come before the CSP is set or it will be blocked.
const metrics = requestFlowMetrics();

document.addEventListener("DOMContentLoaded", () => {
  document.getElementById("sync").addEventListener("submit", submitForm);
}, { once: true });