Data Reduction Proxy Interstitials

components/data_reduction_proxy/content/browser/data_reduction_proxy_ui_manager.cc

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "components/data_reduction_proxy/content/browser/data_reduction_proxy_ui_manager.h"
+
+#include <vector>
+
+#include "base/bind.h"
+#include "base/time/time.h"
+#include "content/public/browser/render_view_host.h"
+#include "content/public/browser/web_contents.h"
+
+namespace data_reduction_proxy {
+
+namespace {
+
+// Once the blocking page is shown, it is not displayed for another five
+// minutes.
+const int kBlockingPageDelayInMinutes = 5;
+
+}
+
+DataReductionProxyUIManager::BypassResource::BypassResource()
+    : is_subresource(false),
+      render_process_host_id(-1),
+      render_view_id(-1) {
+}
+
+DataReductionProxyUIManager::BypassResource::~BypassResource() {
+}
+
+DataReductionProxyUIManager::DataReductionProxyUIManager(
+    const scoped_refptr<base::SingleThreadTaskRunner>& ui_task_runner,
+    const scoped_refptr<base::SingleThreadTaskRunner>& io_task_runner)
+    : ui_task_runner_(ui_task_runner),
+      io_task_runner_(io_task_runner) {
+}
+
+DataReductionProxyUIManager::~DataReductionProxyUIManager() {
+}
+
+bool DataReductionProxyUIManager::IsTabClosed(
+    const BypassResource& resource) const {
+  // The tab might have been closed.
+  content::RenderViewHost* render_view_host =
+      content::RenderViewHost::FromID(resource.render_process_host_id,
+                                      resource.render_view_id);
+  content::WebContents* web_contents = nullptr;
+  if (render_view_host)
+    web_contents = content::WebContents::FromRenderViewHost(render_view_host);
+
+  if(web_contents)
+    return false;
+  return true;
+}
+
+void DataReductionProxyUIManager::DisplayBlockingPage(
+    const BypassResource& resource) {
+  DCHECK(ui_task_runner_->BelongsToCurrentThread());
+  // Check if the user has already ignored the warning for this render_view
+  // and domain.
+  if (base::Time::Now() - blocking_page_last_shown_ <
+          base::TimeDelta::FromMinutes(kBlockingPageDelayInMinutes)) {
+    if (!resource.callback.is_null())
+      io_task_runner_->PostTask(FROM_HERE, base::Bind(resource.callback, true));
+    return;
+  }
+
+  if (IsTabClosed(resource)) {
+    // The tab is gone and there was not a chance to show the interstitial.
+    // Just act as if "Don't Proceed" were chosen.
+    io_task_runner_->PostTask(
+        FROM_HERE,
+        base::Bind(&DataReductionProxyUIManager::OnBlockingPageDone,
+                   this, resource, false));
+    return;
+  }
+
+  // TODO(megjablon): Show blocking page. For now, continue on to the page.
+  io_task_runner_->PostTask(
+      FROM_HERE,
+      base::Bind(&DataReductionProxyUIManager::OnBlockingPageDone,
+                 this, resource, true));
+}
+
+void DataReductionProxyUIManager::OnBlockingPageDone(
+    const BypassResource& resource,
+    bool proceed) {
+  DCHECK(io_task_runner_->BelongsToCurrentThread());
+  if (!resource.callback.is_null())
+    resource.callback.Run(proceed);
+  if (proceed)
+    blocking_page_last_shown_ = base::Time::Now();
+}
+
+}  // namespace data_reduction_proxy