[EasyUnlock] Move DataWithTimestamp out of ForegroundEidGenerator so it can be shared.

components/cryptauth/data_with_timestamp.cc

+// Copyright 2017 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/cryptauth/data_with_timestamp.h"
+
+#include <iomanip>
+
+#include "base/logging.h"
+
+namespace cryptauth {
+
+DataWithTimestamp::DataWithTimestamp(const std::string& data,
+                                     const int64_t start_timestamp_ms,
+                                     const int64_t end_timestamp_ms)
+    : data(data),
+      start_timestamp_ms(start_timestamp_ms),
+      end_timestamp_ms(end_timestamp_ms) {
+  DCHECK(start_timestamp_ms < end_timestamp_ms);
+  DCHECK(data.size());
+}
+
+DataWithTimestamp::DataWithTimestamp(const DataWithTimestamp& other)
+    : data(other.data),
+      start_timestamp_ms(other.start_timestamp_ms),
+      end_timestamp_ms(other.end_timestamp_ms) {
+  DCHECK(start_timestamp_ms < end_timestamp_ms);
+  DCHECK(data.size());
+}
+
+// static.
+std::string DataWithTimestamp::ToDebugString(
+    const std::vector<DataWithTimestamp>& data_with_timestamps) {
+  std::stringstream ss;
+  ss << "[";
+  for (const DataWithTimestamp& data : data_with_timestamps) {
+    ss << "\n  (" << data.start_timestamp_ms << ": " << data.DataInHex()
+       << "),";
+  }
+  ss << "\n]";
+  return ss.str();
+}
+
+bool DataWithTimestamp::ContainsTime(const int64_t timestamp_ms) const {
+  return start_timestamp_ms <= timestamp_ms && timestamp_ms < end_timestamp_ms;
+}
+
+std::string DataWithTimestamp::DataInHex() const {
+  std::stringstream ss;
+  ss << "0x";
+  for (uint8_t byte : data) {
+    ss << std::hex << std::setfill('0') << std::setw(2)
+       << static_cast<uint64_t>(byte);
+  }
+  return ss.str();
+}
+
+bool DataWithTimestamp::operator==(const DataWithTimestamp& other) const {
+  return data == other.data && start_timestamp_ms == other.start_timestamp_ms &&
+         end_timestamp_ms == other.end_timestamp_ms;
+}
+
+}  // namespace cryptauth