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_;
+};
+
+}  // 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,
+    const JavaParamRef<jobject>& caller,
+    const JavaParamRef<jobject>& query_result_jobj,
+    const JavaParamRef<jstring>& url) {
+  if (!profile_->IsSupervised()) {
+    // User isn't supervised
+    Java_SupervisedUserQueryReply_onQueryComplete(env, query_result_jobj.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(),
+          new ScopedJavaGlobalRef<jobject>(env, query_result_jobj.obj())));
+}
+
+void SupervisedUserContentProvider::RequestInsert(
+    JNIEnv* env,
+    const JavaParamRef<jobject>& caller,
+    const JavaParamRef<jobject>& insert_result_jobj,
+    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(
+          &SupervisedUserContentProvider::OnInsertRequestSendComplete,
+          weak_factory_.GetWeakPtr(),
+          new ScopedJavaGlobalRef<jobject>(env, insert_result_jobj.obj())));
+}
+
+void SupervisedUserContentProvider::OnQueryComplete(
+    ScopedJavaGlobalRef<jobject>* query_reply_jobj,

[Bernhard Bauer, 2015/12/17 11:13:21]

You can just copy a ScopedJavaGlobalRef.

[aberent, 2015/12/17 14:59:08]

Done. As discussed.

+    SupervisedUserURLFilter::FilteringBehavior behavior,
+    SupervisedUserURLFilter::FilteringBehaviorReason reason,
+    bool /* uncertain */) {
+  if (behavior != SupervisedUserURLFilter::BLOCK) {
+    Java_SupervisedUserQueryReply_onQueryComplete(
+        AttachCurrentThread(), query_reply_jobj->obj(), true, nullptr);
+  } else {
+    JNIEnv* env = AttachCurrentThread();
+    Java_SupervisedUserQueryReply_onQueryComplete(
+        env, query_reply_jobj->obj(), false,
+        base::android::ConvertUTF8ToJavaString(
+            env, SupervisedUserInterstitial::GetHTMLContents(profile_, reason))
+            .obj());
+  }
+  delete query_reply_jobj;
+}
+
+void SupervisedUserContentProvider::SetFilterForTesting(JNIEnv* env,
+                                                        jobject caller) {
+  if (!profile_->IsSupervised())
+    return;
+  SupervisedUserService* supervised_user_service =
+      SupervisedUserServiceFactory::GetForProfile(profile_);
+  SupervisedUserURLFilter* url_filter =
+      supervised_user_service->GetURLFilterForUIThread();
+  url_filter->SetDefaultFilteringBehavior(SupervisedUserURLFilter::BLOCK);
+}
+
+void SupervisedUserContentProvider::OnInsertRequestSendComplete(
+    ScopedJavaGlobalRef<jobject>* insert_reply_jobj,

[Bernhard Bauer, 2015/12/17 11:13:21]

This would leak (but as mentioned above, you can just copy ScopedJavaGlobalRef).

[aberent, 2015/12/17 14:59:08]

Done.

+    bool sent_ok) {
+  Java_SupervisedUserInsertReply_onInsertRequestSendComplete(
+      AttachCurrentThread(), insert_reply_jobj->obj(), sent_ok);
+}
+
+bool SupervisedUserContentProvider::Register(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}