General source code refactoring

src/auth/xsrf-recovery.js

@@ -0,0 +1,84 @@
+function createAuthXsrfRecovery({
+  COOKIE_REFRESH_POLL_MS,
+  COOKIE_REFRESH_TIMEOUT_MS,
+  OPPORTUNITIES_LIST_URL,
+  getXsrfTokenCookie,
+  supportsFirefoxCookieStoreTabs,
+  tabsCreate,
+  tabsRemove,
+  wait
+}) {
+  async function refreshXsrfCookie(sender) {
+    const startedAt = Date.now();
+    const previous = (await getXsrfTokenCookie()).cookie;
+    const createProperties = {
+      url: OPPORTUNITIES_LIST_URL,
+      active: false
+    };
+
+    if (sender && sender.tab && Number.isInteger(sender.tab.windowId)) {
+      createProperties.windowId = sender.tab.windowId;
+    }
+
+    if (supportsFirefoxCookieStoreTabs() && sender && sender.tab && sender.tab.cookieStoreId) {
+      createProperties.cookieStoreId = sender.tab.cookieStoreId;
+    }
+
+    let refreshTab;
+
+    try {
+      refreshTab = await tabsCreate(createProperties);
+      const current = await waitForXsrfCookieChange(previous);
+      const refreshed = hasCookieChanged(previous, current);
+
+      return {
+        ok: Boolean(current),
+        refreshed,
+        cookieName: current ? current.name : "",
+        durationMs: Date.now() - startedAt,
+        error: refreshed ? "" : "XSRF cookie was not created or changed before timeout."
+      };
+    } finally {
+      if (refreshTab && Number.isInteger(refreshTab.id)) {
+        try {
+          await tabsRemove(refreshTab.id);
+        } catch (error) {
+          // The temporary tab may already have been closed.
+        }
+      }
+    }
+  }
+
+  async function waitForXsrfCookieChange(previousCookie) {
+    const deadline = Date.now() + COOKIE_REFRESH_TIMEOUT_MS;
+    let currentCookie = null;
+
+    while (Date.now() < deadline) {
+      currentCookie = (await getXsrfTokenCookie()).cookie;
+
+      if (hasCookieChanged(previousCookie, currentCookie)) {
+        return currentCookie;
+      }
+
+      await wait(COOKIE_REFRESH_POLL_MS);
+    }
+
+    return currentCookie;
+  }
+
+  function hasCookieChanged(previousCookie, currentCookie) {
+    if (!currentCookie || !currentCookie.value) {
+      return false;
+    }
+
+    if (!previousCookie) {
+      return true;
+    }
+
+    return previousCookie.name !== currentCookie.name
+      || previousCookie.value !== currentCookie.value
+      || previousCookie.expirationDate !== currentCookie.expirationDate;
+  }
+
+  return { refreshXsrfCookie, waitForXsrfCookieChange, hasCookieChanged };
+}