// Copyright 2014 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 "extensions/renderer/runtime_custom_bindings.h"

#include <stdint.h>

#include <memory>

#include "base/bind.h"
#include "base/values.h"
#include "content/public/renderer/render_frame.h"
#include "content/public/renderer/v8_value_converter.h"
#include "extensions/common/extension.h"
#include "extensions/common/extension_messages.h"
#include "extensions/common/manifest.h"
#include "extensions/renderer/extension_frame_helper.h"
#include "extensions/renderer/script_context.h"

namespace extensions {

RuntimeCustomBindings::RuntimeCustomBindings(ScriptContext* context)
    : ObjectBackedNativeHandler(context) {}

RuntimeCustomBindings::~RuntimeCustomBindings() {}

void RuntimeCustomBindings::AddRoutes() {
  RouteHandlerFunction(
      "GetManifest",
      base::Bind(&RuntimeCustomBindings::GetManifest, base::Unretained(this)));
  RouteHandlerFunction("GetExtensionViews",
                       base::Bind(&RuntimeCustomBindings::GetExtensionViews,
                                  base::Unretained(this)));
}

void RuntimeCustomBindings::GetManifest(
    const v8::FunctionCallbackInfo<v8::Value>& args) {
  CHECK(context()->extension());

  args.GetReturnValue().Set(content::V8ValueConverter::Create()->ToV8Value(
      context()->extension()->manifest()->value(), context()->v8_context()));
}

void RuntimeCustomBindings::GetExtensionViews(
    const v8::FunctionCallbackInfo<v8::Value>& args) {
  CHECK_EQ(args.Length(), 3);
  CHECK(args[0]->IsInt32());
  CHECK(args[1]->IsInt32());
  CHECK(args[2]->IsString());

  // |browser_window_id| == extension_misc::kUnknownWindowId means getting
  // all views for the current extension.
  int browser_window_id = args[0]->Int32Value();
  int tab_id = args[1]->Int32Value();

  std::string view_type_string =
      base::ToUpperASCII(*v8::String::Utf8Value(args.GetIsolate(), args[2]));
  // |view_type| == VIEW_TYPE_INVALID means getting any type of
  // views.
  ViewType view_type = VIEW_TYPE_INVALID;
  bool parsed_view_type = GetViewTypeFromString(view_type_string, &view_type);
  if (!parsed_view_type)
    CHECK_EQ("ALL", view_type_string);

  const std::string& extension_id = context()->GetExtensionID();
  if (extension_id.empty())
    return;

  v8::Local<v8::Context> v8_context = args.GetIsolate()->GetCurrentContext();
  // We ignore iframes here. (Returning subframes can cause broken behavior by
  // treating an app window's iframe as its main frame, and maybe other
  // nastiness).
  // TODO(devlin): Why wouldn't we just account for that? It seems like there
  // can be reasons to want to access just a frame - especially with isolated
  // extension frames in web pages.
  v8::Local<v8::Array> v8_views = ExtensionFrameHelper::GetV8MainFrames(
      v8_context, extension_id, browser_window_id, tab_id, view_type);

  args.GetReturnValue().Set(v8_views);
}

}  // namespace extensions