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

 * vim: sw=2 ts=2 et lcs=trail\:.,tab\:>~ :

 * 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 "nsIXPConnect.h"

#include "mozStorageAsyncStatement.h"

#include "mozStorageService.h"

#include "nsMemory.h"

#include "nsString.h"

#include "nsServiceManagerUtils.h"

#include "mozStorageAsyncStatementJSHelper.h"

#include "mozStorageAsyncStatementParams.h"

#include "jsapi.h"

#include "xpc_make_class.h"

namespace mozilla {

namespace storage {

////////////////////////////////////////////////////////////////////////////////

//// AsyncStatementJSHelper

nsresult

AsyncStatementJSHelper::getParams(AsyncStatement *aStatement,

                                  JSContext *aCtx,

                                  JSObject *aScopeObj,

                                  JS::Value *_params)

{

  MOZ_ASSERT(NS_IsMainThread());

#ifdef DEBUG

  int32_t state;

  (void)aStatement->GetState(&state);

  NS_ASSERTION(state == mozIStorageAsyncStatement::MOZ_STORAGE_STATEMENT_READY,

               "Invalid state to get the params object - all calls will fail!");

#endif

  JS::RootedObject scope(aCtx, aScopeObj);

  if (!aStatement->mStatementParamsHolder) {

    dom::GlobalObject global(aCtx, scope);

    if (global.Failed()) {

      return NS_ERROR_UNEXPECTED;

    }

    nsCOMPtr<nsPIDOMWindowInner> window = do_QueryInterface(global.GetAsSupports());

    RefPtr<AsyncStatementParams> params(new AsyncStatementParams(window, aStatement));

    NS_ENSURE_TRUE(params, NS_ERROR_OUT_OF_MEMORY);

    RefPtr<AsyncStatementParamsHolder> paramsHolder = new AsyncStatementParamsHolder(params);

    NS_ENSURE_TRUE(paramsHolder, NS_ERROR_OUT_OF_MEMORY);

    aStatement->mStatementParamsHolder =

      new nsMainThreadPtrHolder<AsyncStatementParamsHolder>(

        "Statement::mStatementParamsHolder", paramsHolder);

  }

  RefPtr<AsyncStatementParams> params(aStatement->mStatementParamsHolder->Get());

  JSObject* obj = params->WrapObject(aCtx, nullptr);

  if (!obj) {

    return NS_ERROR_UNEXPECTED;

  }

  _params->setObject(*obj);

  return NS_OK;

}

NS_IMETHODIMP_(MozExternalRefCountType) AsyncStatementJSHelper::AddRef() { return 2; }

NS_IMETHODIMP_(MozExternalRefCountType) AsyncStatementJSHelper::Release() { return 1; }

NS_INTERFACE_MAP_BEGIN(AsyncStatementJSHelper)

  NS_INTERFACE_MAP_ENTRY(nsIXPCScriptable)

  NS_INTERFACE_MAP_ENTRY(nsISupports)

NS_INTERFACE_MAP_END

////////////////////////////////////////////////////////////////////////////////

//// nsIXPCScriptable

#define XPC_MAP_CLASSNAME         AsyncStatementJSHelper

#define XPC_MAP_QUOTED_CLASSNAME "AsyncStatementJSHelper"

#define XPC_MAP_FLAGS (XPC_SCRIPTABLE_WANT_RESOLVE | \

                       XPC_SCRIPTABLE_ALLOW_PROP_MODS_DURING_RESOLVE)

#include "xpc_map_end.h"

NS_IMETHODIMP

AsyncStatementJSHelper::Resolve(nsIXPConnectWrappedNative *aWrapper,

                                JSContext *aCtx,

                                JSObject *aScopeObj,

                                jsid aId,

                                bool *resolvedp,

                                bool *_retval)

{

  if (!JSID_IS_STRING(aId))

    return NS_OK;

  // Cast to async via mozI* since direct from nsISupports is ambiguous.

  JS::RootedObject scope(aCtx, aScopeObj);

  JS::RootedId id(aCtx, aId);

  mozIStorageAsyncStatement *iAsyncStmt =

    static_cast<mozIStorageAsyncStatement *>(aWrapper->Native());

  AsyncStatement *stmt = static_cast<AsyncStatement *>(iAsyncStmt);

#ifdef DEBUG

  {

    nsISupports *supp = aWrapper->Native();

    nsCOMPtr<mozIStorageAsyncStatement> isStatement(do_QueryInterface(supp));

    NS_ASSERTION(isStatement, "How is this not an async statement?!");

  }

#endif

  if (::JS_FlatStringEqualsAscii(JSID_TO_FLAT_STRING(id), "params")) {

    JS::RootedValue val(aCtx);

    nsresult rv = getParams(stmt, aCtx, scope, val.address());

    NS_ENSURE_SUCCESS(rv, rv);

    *_retval = ::JS_DefinePropertyById(aCtx, scope, id, val, JSPROP_RESOLVING);

    *resolvedp = true;

    return NS_OK;

  }

  return NS_OK;

}

////////////////////////////////////////////////////////////////////////////////

//// AsyncStatementParamsHolder

NS_IMPL_ISUPPORTS0(AsyncStatementParamsHolder);

AsyncStatementParamsHolder::~AsyncStatementParamsHolder()

{

  MOZ_ASSERT(NS_IsMainThread());

  // We are considered dead at this point, so any wrappers for row or params

  // need to lose their reference to the statement.

  mParams->mStatement = nullptr;

}

} // namespace storage

} // namespace mozilla