Implement encoding/decoding of actions

PiperOrigin-RevId: 528534899

internal/platform/ble_connection_info.cc

@@ -15,10 +15,10 @@
 #include "internal/platform/ble_connection_info.h"
 
 #include <string>
+#include <vector>
 
 #include "absl/status/status.h"
 #include "absl/status/statusor.h"
-#include "absl/strings/str_format.h"
 #include "absl/strings/string_view.h"
 #include "internal/platform/connection_info.h"
 
@@ -41,22 +41,22 @@ std::string BleConnectionInfo::ToDataElementBytes() const {
   mask |= has_psm ? kPsmMask : 0;
   payload_data.push_back(mask);
   if (has_mac) {
-    payload_data.insert(payload_data.end(), mac_address_.begin(),
+    payload_data.append(mac_address_.begin(),
                         mac_address_.end());
   }
   if (has_gatt) {
     payload_data.push_back(gatt_characteristic_.length());
-    payload_data.insert(payload_data.end(), gatt_characteristic_.begin(),
+    payload_data.append(gatt_characteristic_.begin(),
                         gatt_characteristic_.end());
   }
   if (has_psm) {
-    payload_data.insert(payload_data.end(), psm_.begin(), psm_.end());
+    payload_data.append(psm_.begin(), psm_.end());
   }
-  payload_data.push_back(actions_);
+  payload_data.append(actions_.begin(), actions_.end());
   std::string ret;
   ret.push_back(kDataElementFieldType);
   ret.push_back(payload_data.size());
-  ret.insert(ret.end(), payload_data.begin(), payload_data.end());
+  ret.append(payload_data.begin(), payload_data.end());
   return ret;
 }
 
@@ -111,12 +111,9 @@ absl::StatusOr<BleConnectionInfo> BleConnectionInfo::FromDataElementBytes(
     return absl::InvalidArgumentError(
         "Insufficient remaining bytes to read action.");
   }
-  char action = bytes[position];
-  // Check that we don't have any remaining bytes.
-  if (bytes.size() != ++position) {
-    return absl::InvalidArgumentError(absl::StrFormat(
-        "Nonzero remaining bytes: %d.", bytes.size() - position));
-  }
-  return BleConnectionInfo(address, characteristic, psm, action);
+  auto action_str = bytes.substr(position);
+  return BleConnectionInfo(
+      address, characteristic, psm,
+      std::vector<uint8_t>(action_str.begin(), action_str.end()));
 }
 }  // namespace nearby