Supervised user web restrictions content provider

chrome/browser/supervised_user/supervised_user_content_provider_android.cc

+// Copyright 2015 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 "chrome/browser/supervised_user/supervised_user_content_provider_android.h"
+
+#include "base/android/jni_android.h"
+#include "base/android/jni_string.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/profiles/profile_manager.h"
+#include "chrome/browser/supervised_user/supervised_user_interstitial.h"
+#include "chrome/browser/supervised_user/supervised_user_service.h"
+#include "chrome/browser/supervised_user/supervised_user_service_factory.h"
+#include "jni/SupervisedUserContentProvider_jni.h"
+
+using base::android::JavaRef;
+using base::android::JavaParamRef;
+using base::android::ScopedJavaGlobalRef;
+using base::android::AttachCurrentThread;
+
+namespace {
+
+class UrlFilterObserver : public SupervisedUserURLFilter::Observer {
+ public:
+  UrlFilterObserver(JNIEnv* env,
+                    const ScopedJavaGlobalRef<jobject>& java_content_provider)
+      : java_content_provider_(java_content_provider) {}
+
+  virtual ~UrlFilterObserver() {}
+
+ private:
+  void OnSiteListUpdated() override {
+    Java_SupervisedUserContentProvider_onSupervisedUserFilterUpdated(
+        AttachCurrentThread(), java_content_provider_.obj());
+  }
+  ScopedJavaGlobalRef<jobject> java_content_provider_;
+};
+
+void DoNothingCallback(bool /*b*/) {}

[Bernhard Bauer, 2015/12/14 17:58:38]

This is available as base::DoNothing() (in base/bind_helpers.h).

[aberent, 2015/12/16 15:20:37]

No it isn't. Base::DoNothing() doesn't take an argument. I need a function with
a single boolean argument.

[aberent, 2015/12/16 15:22:54]

Actually no longer does nothing (hence renamed), so no longer relevant.

+
+}  // namespace
+
+static jlong CreateSupervisedUserContentProvider(
+    JNIEnv* env,
+    const JavaParamRef<jobject>& caller) {
+  return reinterpret_cast<intptr_t>(
+      new SupervisedUserContentProvider(env, caller));
+}
+
+SupervisedUserContentProvider::SupervisedUserContentProvider(
+    JNIEnv* env,
+    const JavaParamRef<jobject>& caller)
+    : profile_(ProfileManager::GetLastUsedProfile()),
+      java_content_provider_(env, caller),
+      weak_factory_(this) {
+  if (profile_->IsSupervised()) {
+    SupervisedUserService* supervised_user_service =
+        SupervisedUserServiceFactory::GetForProfile(profile_);
+    SupervisedUserURLFilter* url_filter =
+        supervised_user_service->GetURLFilterForUIThread();
+    url_filter->AddObserver(new UrlFilterObserver(env, java_content_provider_));
+  }
+}
+
+SupervisedUserContentProvider::~SupervisedUserContentProvider() {}
+
+void SupervisedUserContentProvider::ShouldProceed(
+    JNIEnv* env,
+    jobject caller,
+    const JavaParamRef<jstring>& url) {
+  if (!profile_->IsSupervised()) {
+    // User isn't supervised
+    Java_SupervisedUserContentProvider_onQueryComplete(
+        AttachCurrentThread(), java_content_provider_.obj(), true, nullptr);
+    return;
+  }
+  SupervisedUserService* supervised_user_service =
+      SupervisedUserServiceFactory::GetForProfile(profile_);
+  SupervisedUserURLFilter* url_filter =
+      supervised_user_service->GetURLFilterForUIThread();
+  url_filter->GetFilteringBehaviorForURLWithAsyncChecks(
+      GURL(base::android::ConvertJavaStringToUTF16(env, url)),
+      base::Bind(&SupervisedUserContentProvider::OnQueryComplete,
+                 weak_factory_.GetWeakPtr()));
+}
+
+void SupervisedUserContentProvider::RequestInsert(
+    JNIEnv* env,
+    jobject caller,
+    const JavaParamRef<jstring>& url) {
+  if (!profile_->IsSupervised())
+    return;
+  SupervisedUserService* supervised_user_service =
+      SupervisedUserServiceFactory::GetForProfile(profile_);
+  supervised_user_service->AddURLAccessRequest(
+      GURL(base::android::ConvertJavaStringToUTF16(env, url)),
+      base::Bind(DoNothingCallback));

[Bernhard Bauer, 2015/12/14 17:58:37]

Hm... in principle we could return an error if creating the permission request
fails.

[aberent, 2015/12/16 15:20:37]

Done.

+}
+
+void SupervisedUserContentProvider::OnQueryComplete(
+    SupervisedUserURLFilter::FilteringBehavior behavior,
+    SupervisedUserURLFilter::FilteringBehaviorReason reason,
+    bool /* uncertain */) {
+  if (behavior != SupervisedUserURLFilter::BLOCK) {
+    Java_SupervisedUserContentProvider_onQueryComplete(
+        AttachCurrentThread(), java_content_provider_.obj(), true, nullptr);
+  } else {
+    JNIEnv* env = AttachCurrentThread();
+    Java_SupervisedUserContentProvider_onQueryComplete(
+        env, java_content_provider_.obj(), false,
+        base::android::ConvertUTF8ToJavaString(
+            env, SupervisedUserInterstitial::GetHTMLContents(profile_, reason))
+            .obj());
+  }
+}
+
+void SupervisedUserContentProvider::SetFilterForTesting(JNIEnv* env,
+                                                        jobject caller) {
+  if (!profile_->IsSupervised()) {

[Bernhard Bauer, 2015/12/14 17:58:37]

Leave out the braces.

[aberent, 2015/12/16 15:20:37]

Done.

+    return;
+  }
+  SupervisedUserService* supervised_user_service =
+      SupervisedUserServiceFactory::GetForProfile(profile_);
+  SupervisedUserURLFilter* url_filter =
+      supervised_user_service->GetURLFilterForUIThread();
+  url_filter->SetDefaultFilteringBehavior(SupervisedUserURLFilter::BLOCK);
+}
+
+bool RegisterSupervisedUserContentProvider(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}