/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim:set ts=2 sw=2 sts=2 et cindent: */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this file,

 * You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "mozilla/dom/MIDIPermissionRequest.h"

#include "mozilla/dom/MIDIAccessManager.h"

#include "nsIGlobalObject.h"

#include "mozilla/Preferences.h"

#include "nsContentUtils.h"

//-------------------------------------------------

// MIDI Permission Requests

//-------------------------------------------------

NS_IMPL_CYCLE_COLLECTION(MIDIPermissionRequest, mWindow, mPromise)

NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(MIDIPermissionRequest)

  NS_INTERFACE_MAP_ENTRY(nsIContentPermissionRequest)

  NS_INTERFACE_MAP_ENTRY(nsIRunnable)

  NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIContentPermissionRequest)

NS_INTERFACE_MAP_END

NS_IMPL_CYCLE_COLLECTING_ADDREF(MIDIPermissionRequest)

NS_IMPL_CYCLE_COLLECTING_RELEASE(MIDIPermissionRequest)

MIDIPermissionRequest::MIDIPermissionRequest(nsPIDOMWindowInner* aWindow,

                                             Promise* aPromise,

                                             const MIDIOptions& aOptions)

    : mWindow(aWindow),

      mPromise(aPromise),

      mNeedsSysex(aOptions.mSysex),

      mRequester(new nsContentPermissionRequester(mWindow)) {

  MOZ_ASSERT(aWindow);

  MOZ_ASSERT(aPromise, "aPromise should not be null!");

  MOZ_ASSERT(aWindow->GetDoc());

  mPrincipal = aWindow->GetDoc()->NodePrincipal();

  MOZ_ASSERT(mPrincipal);

}

MIDIPermissionRequest::~MIDIPermissionRequest() {}

NS_IMETHODIMP

MIDIPermissionRequest::GetIsHandlingUserInput(bool* aHandlingInput) {

  *aHandlingInput = true;

  return NS_OK;

}

NS_IMETHODIMP

MIDIPermissionRequest::GetRequester(

    nsIContentPermissionRequester** aRequester) {

  NS_ENSURE_ARG_POINTER(aRequester);

  nsCOMPtr<nsIContentPermissionRequester> requester = mRequester;

  requester.forget(aRequester);

  return NS_OK;

}

NS_IMETHODIMP

MIDIPermissionRequest::GetTypes(nsIArray** aTypes) {

  NS_ENSURE_ARG_POINTER(aTypes);

  nsTArray<nsString> options;

  if (mNeedsSysex) {

    options.AppendElement(NS_LITERAL_STRING("sysex"));

  }

  return nsContentPermissionUtils::CreatePermissionArray(

      NS_LITERAL_CSTRING("midi"), NS_LITERAL_CSTRING("unused"), options,

      aTypes);

}

NS_IMETHODIMP

MIDIPermissionRequest::GetPrincipal(nsIPrincipal** aRequestingPrincipal) {

  NS_ENSURE_ARG_POINTER(aRequestingPrincipal);

  NS_IF_ADDREF(*aRequestingPrincipal = mPrincipal);

  return NS_OK;

}

NS_IMETHODIMP

MIDIPermissionRequest::GetWindow(mozIDOMWindow** aRequestingWindow) {

  NS_ENSURE_ARG_POINTER(aRequestingWindow);

  NS_IF_ADDREF(*aRequestingWindow = mWindow);

  return NS_OK;

}

NS_IMETHODIMP

MIDIPermissionRequest::GetElement(nsIDOMElement** aRequestingElement) {

  NS_ENSURE_ARG_POINTER(aRequestingElement);

  *aRequestingElement = nullptr;

  return NS_OK;

}

NS_IMETHODIMP

MIDIPermissionRequest::Cancel() {

  mPromise->MaybeReject(NS_ERROR_DOM_SECURITY_ERR);

  return NS_OK;

}

NS_IMETHODIMP

MIDIPermissionRequest::Allow(JS::HandleValue aChoices) {

  MOZ_ASSERT(aChoices.isUndefined());

  MIDIAccessManager* mgr = MIDIAccessManager::Get();

  mgr->CreateMIDIAccess(mWindow, mNeedsSysex, mPromise);

  return NS_OK;

}

NS_IMETHODIMP

MIDIPermissionRequest::Run() {

  // If the testing flag is true, skip dialog

  if (Preferences::GetBool("midi.prompt.testing", false)) {

    bool allow =

        Preferences::GetBool("media.navigator.permission.disabled", false);

    if (allow) {

      Allow(JS::UndefinedHandleValue);

    } else {

      Cancel();

    }

    return NS_OK;

  }

  // If we already have sysex perms, allow.

  if (nsContentUtils::IsExactSitePermAllow(mPrincipal, "midi-sysex")) {

    Allow(JS::UndefinedHandleValue);

    return NS_OK;

  }

  // If we have no perms, or only have midi and are asking for sysex, pop dialog

  if (NS_FAILED(nsContentPermissionUtils::AskPermission(this, mWindow))) {

    Cancel();

    return NS_ERROR_FAILURE;

  }

  return NS_OK;

}