nearby: snapshot as of cl/296436629

Signed-off-by: Alexey Polyudov <apolyudov@google.com>
Change-Id: I2cf5bf225b76f4c1541954651f3a7544a14e0cec

cpp/platform/base64_utils.cc

@@ -0,0 +1,56 @@
+#include "platform/base64_utils.h"
+
+#include "strings/escaping.h"
+#include "absl/strings/escaping.h"
+
+namespace location {
+namespace nearby {
+
+std::string Base64Utils::encode(ConstPtr<ByteArray> bytes) {
+  std::string base64_string;
+
+  if (!bytes.isNull()) {
+    absl::WebSafeBase64Escape(std::string(bytes->getData(), bytes->size()),
+                              &base64_string);
+  }
+
+  return base64_string;
+}
+
+std::string Base64Utils::encode(const ByteArray& bytes) {
+  std::string base64_string;
+  absl::WebSafeBase64Escape(std::string(bytes.getData(), bytes.size()),
+                            &base64_string);
+
+  return base64_string;
+}
+
+std::string Base64Utils::encode(const std::string& input) {
+  std::string base64_string;
+  absl::WebSafeBase64Escape(input, &base64_string);
+
+  return base64_string;
+}
+
+template<>
+Ptr<ByteArray> Base64Utils::decode(const std::string& base64_string) {
+  std::string decoded_string;
+  if (!absl::WebSafeBase64Unescape(base64_string, &decoded_string)) {
+    return Ptr<ByteArray>();
+  }
+
+  return MakePtr(new ByteArray(decoded_string.data(), decoded_string.size()));
+}
+
+template<>
+ByteArray Base64Utils::decode(const std::string& 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