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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "nsUrlClassifierProxies.h"
#include "nsUrlClassifierDBService.h"

#include "mozilla/SyncRunnable.h"

using namespace mozilla::safebrowsing;
using mozilla::NewRunnableMethod;

static nsresult
DispatchToWorkerThread(nsIRunnable* r)
{
  nsIThread* t = nsUrlClassifierDBService::BackgroundThread();
  if (!t)
    return NS_ERROR_FAILURE;

  return t->Dispatch(r, NS_DISPATCH_NORMAL);
}

NS_IMPL_ISUPPORTS(UrlClassifierDBServiceWorkerProxy, nsIUrlClassifierDBService)

NS_IMETHODIMP
UrlClassifierDBServiceWorkerProxy::Lookup(nsIPrincipal* aPrincipal,
                                          const nsACString& aTables,
                                          nsIUrlClassifierCallback* aCB)
{
  nsCOMPtr<nsIRunnable> r = new LookupRunnable(mTarget, aPrincipal, aTables,
                                               aCB);
  return DispatchToWorkerThread(r);
}

NS_IMETHODIMP
UrlClassifierDBServiceWorkerProxy::LookupRunnable::Run()
{
  (void) mTarget->Lookup(mPrincipal, mLookupTables, mCB);
  return NS_OK;
}

NS_IMETHODIMP
UrlClassifierDBServiceWorkerProxy::GetTables(nsIUrlClassifierCallback* aCB)
{
  nsCOMPtr<nsIRunnable> r = new GetTablesRunnable(mTarget, aCB);
  return DispatchToWorkerThread(r);
}

NS_IMETHODIMP
UrlClassifierDBServiceWorkerProxy::GetTablesRunnable::Run()
{
  mTarget->GetTables(mCB);
  return NS_OK;
}

NS_IMETHODIMP
UrlClassifierDBServiceWorkerProxy::SetHashCompleter
  (const nsACString&, nsIUrlClassifierHashCompleter*)
{
  MOZ_ASSERT_UNREACHABLE("This method should not be called!");
  return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP
UrlClassifierDBServiceWorkerProxy::BeginUpdate
  (nsIUrlClassifierUpdateObserver* aUpdater,
   const nsACString& aTables)
{
  nsCOMPtr<nsIRunnable> r = new BeginUpdateRunnable(mTarget, aUpdater,
                                                    aTables);
  return DispatchToWorkerThread(r);
}

NS_IMETHODIMP
UrlClassifierDBServiceWorkerProxy::BeginUpdateRunnable::Run()
{
  mTarget->BeginUpdate(mUpdater, mTables);
  return NS_OK;
}

NS_IMETHODIMP
UrlClassifierDBServiceWorkerProxy::BeginStream(const nsACString& aTable)
{
  nsCOMPtr<nsIRunnable> r =
    new BeginStreamRunnable(mTarget, aTable);
  return DispatchToWorkerThread(r);
}

NS_IMETHODIMP
UrlClassifierDBServiceWorkerProxy::BeginStreamRunnable::Run()
{
  mTarget->BeginStream(mTable);
  return NS_OK;
}

NS_IMETHODIMP
UrlClassifierDBServiceWorkerProxy::UpdateStream(const nsACString& aUpdateChunk)
{
  nsCOMPtr<nsIRunnable> r =
    new UpdateStreamRunnable(mTarget, aUpdateChunk);
  return DispatchToWorkerThread(r);
}

NS_IMETHODIMP
UrlClassifierDBServiceWorkerProxy::UpdateStreamRunnable::Run()
{
  mTarget->UpdateStream(mUpdateChunk);
  return NS_OK;
}

NS_IMETHODIMP
UrlClassifierDBServiceWorkerProxy::FinishStream()
{
  nsCOMPtr<nsIRunnable> r =
    NewRunnableMethod("nsUrlClassifierDBServiceWorker::FinishStream",
                      mTarget,
                      &nsUrlClassifierDBServiceWorker::FinishStream);
  return DispatchToWorkerThread(r);
}

NS_IMETHODIMP
UrlClassifierDBServiceWorkerProxy::DoLocalLookupRunnable::Run()
{
  mTarget->DoLocalLookup(mSpec, mTables, mResults);
  return NS_OK;
}

nsresult
UrlClassifierDBServiceWorkerProxy::DoLocalLookup(const nsACString& spec,
                                                 const nsACString& tables,
                                                 LookupResultArray& results) const

{
  // Run synchronously on background thread. NS_DISPATCH_SYNC does *not* do
  // what we want -- it continues processing events on the main thread loop
  // before the Dispatch returns.
  nsCOMPtr<nsIRunnable> r = new DoLocalLookupRunnable(mTarget, spec, tables, results);
  nsIThread* t = nsUrlClassifierDBService::BackgroundThread();
  if (!t)
    return NS_ERROR_FAILURE;

  mozilla::SyncRunnable::DispatchToThread(t, r);
  return NS_OK;
}

NS_IMETHODIMP
UrlClassifierDBServiceWorkerProxy::FinishUpdate()
{
  nsCOMPtr<nsIRunnable> r =
    NewRunnableMethod("nsUrlClassifierDBServiceWorker::FinishUpdate",
                      mTarget,
                      &nsUrlClassifierDBServiceWorker::FinishUpdate);
  return DispatchToWorkerThread(r);
}

NS_IMETHODIMP
UrlClassifierDBServiceWorkerProxy::CancelUpdate()
{
  nsCOMPtr<nsIRunnable> r =
    NewRunnableMethod("nsUrlClassifierDBServiceWorker::CancelUpdate",
                      mTarget,
                      &nsUrlClassifierDBServiceWorker::CancelUpdate);
  return DispatchToWorkerThread(r);
}

NS_IMETHODIMP
UrlClassifierDBServiceWorkerProxy::ResetDatabase()
{
  nsCOMPtr<nsIRunnable> r =
    NewRunnableMethod("nsUrlClassifierDBServiceWorker::ResetDatabase",
                      mTarget,
                      &nsUrlClassifierDBServiceWorker::ResetDatabase);
  return DispatchToWorkerThread(r);
}

NS_IMETHODIMP
UrlClassifierDBServiceWorkerProxy::ReloadDatabase()
{
  nsCOMPtr<nsIRunnable> r =
    NewRunnableMethod("nsUrlClassifierDBServiceWorker::ReloadDatabase",
                      mTarget,
                      &nsUrlClassifierDBServiceWorker::ReloadDatabase);
  return DispatchToWorkerThread(r);
}

NS_IMETHODIMP
UrlClassifierDBServiceWorkerProxy::ClearCache()
{
  nsCOMPtr<nsIRunnable> r =
    NewRunnableMethod("nsUrlClassifierDBServiceWorker::ClearCache",
                      mTarget,
                      &nsUrlClassifierDBServiceWorker::ClearCache);
  return DispatchToWorkerThread(r);
}

nsresult
UrlClassifierDBServiceWorkerProxy::OpenDb() const
{
  nsCOMPtr<nsIRunnable> r =
    NewRunnableMethod("nsUrlClassifierDBServiceWorker::OpenDb",
                      mTarget,
                      &nsUrlClassifierDBServiceWorker::OpenDb);
  return DispatchToWorkerThread(r);
}

nsresult
UrlClassifierDBServiceWorkerProxy::CloseDb() const
{
  nsCOMPtr<nsIRunnable> r =
    NewRunnableMethod("nsUrlClassifierDBServiceWorker::CloseDb",
                      mTarget,
                      &nsUrlClassifierDBServiceWorker::CloseDb);
  return DispatchToWorkerThread(r);
}

nsresult
UrlClassifierDBServiceWorkerProxy::PreShutdown() const
{
  nsCOMPtr<nsIRunnable> r =
    NewRunnableMethod("nsUrlClassifierDBServiceWorker::PreShutdown",
                      mTarget,
                      &nsUrlClassifierDBServiceWorker::PreShutdown);
  return DispatchToWorkerThread(r);
}

nsresult
UrlClassifierDBServiceWorkerProxy::CacheCompletions(const ConstCacheResultArray& aEntries) const
{
  nsCOMPtr<nsIRunnable> r = new CacheCompletionsRunnable(mTarget, aEntries);
  return DispatchToWorkerThread(r);
}

NS_IMETHODIMP
UrlClassifierDBServiceWorkerProxy::CacheCompletionsRunnable::Run()
{
  mTarget->CacheCompletions(mEntries);
  return NS_OK;
}

NS_IMETHODIMP
UrlClassifierDBServiceWorkerProxy::ClearLastResults()
{
  nsCOMPtr<nsIRunnable> r = new ClearLastResultsRunnable(mTarget);
  return DispatchToWorkerThread(r);
}

NS_IMETHODIMP
UrlClassifierDBServiceWorkerProxy::ClearLastResultsRunnable::Run()
{
  return mTarget->ClearLastResults();
}

nsresult
UrlClassifierDBServiceWorkerProxy::GetCacheInfo(const nsACString& aTable,
                                                nsIUrlClassifierGetCacheCallback* aCallback) const
{
  nsCOMPtr<nsIRunnable> r = new GetCacheInfoRunnable(mTarget, aTable, aCallback);
  return DispatchToWorkerThread(r);
}

NS_IMETHODIMP
UrlClassifierDBServiceWorkerProxy::GetCacheInfoRunnable::Run()
{
  MOZ_ASSERT(mCallback);

  mTarget->GetCacheInfo(mTable, getter_AddRefs(mCache));

  nsCOMPtr<nsIRunnable> r = new GetCacheInfoCallbackRunnable(mCache, mCallback);
  return NS_DispatchToMainThread(r);
}


NS_IMETHODIMP
UrlClassifierDBServiceWorkerProxy::GetCacheInfoCallbackRunnable::Run()
{
  MOZ_ASSERT(NS_IsMainThread(), "Must be called on main thread");
  MOZ_ASSERT(mCallback);

  mCallback->OnGetCacheComplete(mCache);

  return NS_OK;
}

NS_IMPL_ISUPPORTS(UrlClassifierLookupCallbackProxy,
                  nsIUrlClassifierLookupCallback)

NS_IMETHODIMP
UrlClassifierLookupCallbackProxy::LookupComplete(UniquePtr<LookupResultArray> aResults)
{
  nsCOMPtr<nsIRunnable> r = new LookupCompleteRunnable(mTarget,
                                                       std::move(aResults));
  return NS_DispatchToMainThread(r);
}

NS_IMETHODIMP
UrlClassifierLookupCallbackProxy::LookupCompleteRunnable::Run()
{
  mTarget->LookupComplete(std::move(mResults));
  return NS_OK;
}

NS_IMPL_ISUPPORTS(UrlClassifierCallbackProxy,
                  nsIUrlClassifierCallback)

NS_IMETHODIMP
UrlClassifierCallbackProxy::HandleEvent(const nsACString& aValue)
{
  nsCOMPtr<nsIRunnable> r = new HandleEventRunnable(mTarget, aValue);
  return NS_DispatchToMainThread(r);
}

NS_IMETHODIMP
UrlClassifierCallbackProxy::HandleEventRunnable::Run()
{
  mTarget->HandleEvent(mValue);
  return NS_OK;
}

NS_IMPL_ISUPPORTS(UrlClassifierUpdateObserverProxy,
                  nsIUrlClassifierUpdateObserver)

NS_IMETHODIMP
UrlClassifierUpdateObserverProxy::UpdateUrlRequested
  (const nsACString& aURL,
   const nsACString& aTable)
{
  nsCOMPtr<nsIRunnable> r =
    new UpdateUrlRequestedRunnable(mTarget, aURL, aTable);
  return NS_DispatchToMainThread(r);
}

NS_IMETHODIMP
UrlClassifierUpdateObserverProxy::UpdateUrlRequestedRunnable::Run()
{
  mTarget->UpdateUrlRequested(mURL, mTable);
  return NS_OK;
}

NS_IMETHODIMP
UrlClassifierUpdateObserverProxy::StreamFinished(nsresult aStatus,
                                                 uint32_t aDelay)
{
  nsCOMPtr<nsIRunnable> r =
    new StreamFinishedRunnable(mTarget, aStatus, aDelay);
  return NS_DispatchToMainThread(r);
}

NS_IMETHODIMP
UrlClassifierUpdateObserverProxy::StreamFinishedRunnable::Run()
{
  mTarget->StreamFinished(mStatus, mDelay);
  return NS_OK;
}

NS_IMETHODIMP
UrlClassifierUpdateObserverProxy::UpdateError(nsresult aError)
{
  nsCOMPtr<nsIRunnable> r =
    new UpdateErrorRunnable(mTarget, aError);
  return NS_DispatchToMainThread(r);
}

NS_IMETHODIMP
UrlClassifierUpdateObserverProxy::UpdateErrorRunnable::Run()
{
  mTarget->UpdateError(mError);
  return NS_OK;
}

NS_IMETHODIMP
UrlClassifierUpdateObserverProxy::UpdateSuccess(uint32_t aRequestedTimeout)
{
  nsCOMPtr<nsIRunnable> r =
    new UpdateSuccessRunnable(mTarget, aRequestedTimeout);
  return NS_DispatchToMainThread(r);
}

NS_IMETHODIMP
UrlClassifierUpdateObserverProxy::UpdateSuccessRunnable::Run()
{
  mTarget->UpdateSuccess(mRequestedTimeout);
  return NS_OK;
}