1 files changed, 67 insertions, 0 deletions
diff --git a/components/invalidation/ack_handle.cc b/components/invalidation/ack_handle.cc
new file mode 100644
index 0000000..ee0e8b6
--- /dev/null
+++ b/components/invalidation/ack_handle.cc
@@ -0,0 +1,67 @@
+// 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 "components/invalidation/ack_handle.h"
+
+#include <cstddef>
+#include "base/rand_util.h"
+#include "base/strings/string_number_conversions.h"
+#include "base/values.h"
+
+namespace syncer {
+
+namespace {
+// Hopefully enough bytes for uniqueness.
+const size_t kBytesInHandle = 16;
+}  // namespace
+
+AckHandle AckHandle::CreateUnique() {
+  // This isn't a valid UUID, so we don't attempt to format it like one.
+  uint8 random_bytes[kBytesInHandle];
+  base::RandBytes(random_bytes, sizeof(random_bytes));
+  return AckHandle(base::HexEncode(random_bytes, sizeof(random_bytes)),
+                   base::Time::Now());
+}
+
+AckHandle AckHandle::InvalidAckHandle() {
+  return AckHandle(std::string(), base::Time());
+}
+
+bool AckHandle::Equals(const AckHandle& other) const {
+  return state_ == other.state_ && timestamp_ == other.timestamp_;
+}
+
+scoped_ptr<base::DictionaryValue> AckHandle::ToValue() const {
+  scoped_ptr<base::DictionaryValue> value(new base::DictionaryValue());
+  value->SetString("state", state_);
+  value->SetString("timestamp",
+                   base::Int64ToString(timestamp_.ToInternalValue()));
+  return value.Pass();
+}
+
+bool AckHandle::ResetFromValue(const base::DictionaryValue& value) {
+  if (!value.GetString("state", &state_))
+    return false;
+  std::string timestamp_as_string;
+  if (!value.GetString("timestamp", &timestamp_as_string))
+    return false;
+  int64 timestamp_value;
+  if (!base::StringToInt64(timestamp_as_string, &timestamp_value))
+    return false;
+  timestamp_ = base::Time::FromInternalValue(timestamp_value);
+  return true;
+}
+
+bool AckHandle::IsValid() const {
+  return !state_.empty();
+}
+
+AckHandle::AckHandle(const std::string& state, base::Time timestamp)
+    : state_(state), timestamp_(timestamp) {
+}
+
+AckHandle::~AckHandle() {
+}
+
+}  // namespace syncer