nearby sdk refactor

PiperOrigin-RevId: 425434260

internal/platform/base64_utils.cc

@@ -0,0 +1,41 @@
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "internal/platform/base64_utils.h"
+
+#include "absl/strings/escaping.h"
+#include "internal/platform/byte_array.h"
+
+namespace location {
+namespace nearby {
+
+std::string Base64Utils::Encode(const ByteArray& bytes) {
+  std::string base64_string;
+
+  absl::WebSafeBase64Escape(std::string(bytes), &base64_string);
+
+  return base64_string;
+}
+
+ByteArray Base64Utils::Decode(absl::string_view base64_string) {
+  std::string decoded_string;
+  if (!absl::WebSafeBase64Unescape(base64_string, &decoded_string)) {
+    return ByteArray();
+  }
+
+  return ByteArray(decoded_string.data(), decoded_string.size());
+}
+
+}  // namespace nearby
+}  // namespace location