dom/datastore/DataStoreRevision.cpp

   1 /* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
   2 /* vim: set ts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
   5  * You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "DataStoreRevision.h"
   8
   9 #include "DataStoreCallbacks.h"
  10 #include "DataStoreService.h"
  11 #include "mozilla/dom/DataStoreBinding.h"
  12 #include "mozilla/dom/ToJSValue.h"
  13 #include "mozilla/dom/indexedDB/IDBObjectStore.h"
  14 #include "mozilla/dom/indexedDB/IDBRequest.h"
  15 #include "nsIDOMEvent.h"
  16
  17 namespace mozilla {
  18 namespace dom {
  19
  20 using namespace indexedDB;
  21
  22 NS_IMPL_ISUPPORTS(DataStoreRevision, nsIDOMEventListener)
  23
  24 // Note: this code in it must not assume anything about the compartment cx is
  25 // in.
  26 nsresult
  27 DataStoreRevision::AddRevision(JSContext* aCx,
  28                                IDBObjectStore* aStore,
  29                                uint32_t aObjectId,
  30                                RevisionType aRevisionType,
  31                                DataStoreRevisionCallback* aCallback)
  32 {
  33   MOZ_ASSERT(aStore);
  34   MOZ_ASSERT(aCallback);
  35
  36   nsRefPtr<DataStoreService> service = DataStoreService::Get();
  37   if (!service) {
  38     return NS_ERROR_FAILURE;
  39   }
  40
  41   nsString id;
  42   nsresult rv = service->GenerateUUID(mRevisionID);
  43   if (NS_WARN_IF(NS_FAILED(rv))) {
  44     return rv;
  45   }
  46
  47   DataStoreRevisionData data;
  48   data.mRevisionId = mRevisionID;
  49   data.mObjectId = aObjectId;
  50
  51   switch (aRevisionType) {
  52     case RevisionVoid:
  53       data.mOperation = NS_LITERAL_STRING("void");
  54       break;
  55
  56     default:
  57       MOZ_CRASH("This should not happen");
  58   }
  59
  60   JS::Rooted<JS::Value> value(aCx);
  61   if (!ToJSValue(aCx, data, &value)) {
  62     return NS_ERROR_FAILURE;
  63   }
  64
  65   ErrorResult error;
  66   mRequest = aStore->Put(aCx, value, JS::UndefinedHandleValue, error);
  67   if (NS_WARN_IF(error.Failed())) {
  68     return error.ErrorCode();
  69   }
  70
  71   rv = mRequest->EventTarget::AddEventListener(NS_LITERAL_STRING("success"),
  72                                                this, false);
  73   if (NS_WARN_IF(NS_FAILED(rv))) {
  74     return rv;
  75   }
  76
  77   mCallback = aCallback;
  78   return NS_OK;
  79 }
  80
  81 NS_IMETHODIMP
  82 DataStoreRevision::HandleEvent(nsIDOMEvent* aEvent)
  83 {
  84   nsString type;
  85   nsresult rv = aEvent->GetType(type);
  86   if (NS_WARN_IF(NS_FAILED(rv))) {
  87     return rv;
  88   }
  89
  90   if (!type.EqualsASCII("success")) {
  91     MOZ_CRASH("This should not happen");
  92   }
  93
  94   mRequest->RemoveEventListener(NS_LITERAL_STRING("success"), this, false);
  95   mRequest = nullptr;
  96
  97   mCallback->Run(mRevisionID);
  98   return NS_OK;
  99 }
 100
 101 } // dom namespace
 102 } // mozilla namespace