opportunities-extension/src/platform/content-messages.js

function createPlatformContentMessages({
  messageTypes,
  requestCache,
  environment
}) {
  const { browser, chrome } = environment;
  function sendRuntimeMessage(message) {
    return requestCache ? requestCache.send(message, sendUncached) : sendUncached(message);
  }
  function sendUncached(message) {
    const runtimeApi = typeof browser !== "undefined" ? browser : chrome;

    if (!runtimeApi || !runtimeApi.runtime || !runtimeApi.runtime.sendMessage) {
      return Promise.reject(new Error("Runtime messaging API unavailable."));
    }

    if (typeof browser !== "undefined") {
      return runtimeApi.runtime.sendMessage(message);
    }

    return new Promise((resolve, reject) => {
      runtimeApi.runtime.sendMessage(message, (response) => {
        const lastError = runtimeApi.runtime.lastError;

        if (lastError) {
          reject(new Error(lastError.message));
          return;
        }

        resolve(response);
      });
    });
  }

  function getXsrfTokenFromExtensionCookies() {
    const runtimeApi = typeof browser !== "undefined" ? browser : chrome;

    if (!runtimeApi || !runtimeApi.runtime || !runtimeApi.runtime.sendMessage) {
      return Promise.resolve({
        token: "",
        cookieName: "",
        source: "unavailable cookies API",
        error: "Runtime messaging API unavailable."
      });
    }

    return new Promise((resolve) => {
      runtimeApi.runtime.sendMessage({
        type: messageTypes.getXsrfToken
      }, (response) => {
        const lastError = runtimeApi.runtime.lastError;

        if (lastError) {
          resolve({
            token: "",
            cookieName: "",
            source: "cookies API",
            matchedCookieNames: [],
            lookupDetails: [],
            error: lastError.message
          });
          return;
        }

        resolve({
          token: response && response.ok ? response.token : "",
          cookieName: response && response.ok ? response.cookieName : "",
          source: "cookies API",
          matchedCookieNames: response && response.matchedCookieNames ? response.matchedCookieNames : [],
          lookupDetails: response && response.lookupDetails ? response.lookupDetails : [],
          error: response && response.error ? response.error : ""
        });
      });
    });
  }

  function refreshXsrfCookie(reason) {
    const runtimeApi = typeof browser !== "undefined" ? browser : chrome;

    if (!runtimeApi || !runtimeApi.runtime || !runtimeApi.runtime.sendMessage) {
      return Promise.resolve({
        ok: false,
        refreshed: false,
        cookieName: "",
        durationMs: 0,
        reason,
        error: "Runtime messaging API unavailable."
      });
    }

    return new Promise((resolve) => {
      runtimeApi.runtime.sendMessage({
        type: messageTypes.refreshXsrfCookie
      }, (response) => {
        const lastError = runtimeApi.runtime.lastError;

        if (lastError) {
          resolve({
            ok: false,
            refreshed: false,
            cookieName: "",
            durationMs: 0,
            reason,
            error: lastError.message
          });
          return;
        }

        resolve({
          ...(response || {
            ok: false,
            refreshed: false,
            cookieName: "",
            durationMs: 0,
            error: "Empty refresh response."
          }),
          reason
        });
      });
    });
  }

  return { sendRuntimeMessage, getXsrfTokenFromExtensionCookies, refreshXsrfCookie };
}