syntax = "proto3";

package gitks;

import "google/protobuf/empty.proto";
import "oid.proto";
import "repository.proto";


message FindDefaultBranchNameRequest {
  RepositoryHeader repository = 1;
}

message FindDefaultBranchNameResponse {
  string name = 1;
}

message RefExistsRequest {
  RepositoryHeader repository = 1;
  string ref_name = 2;
}

message RefExistsResponse {
  bool exists = 1;
}


message RefUpdateEntry {
  string ref_name = 1;
  string new_oid = 2;
  string old_oid = 3; // expected old OID (empty = no check)
}

message UpdateReferencesRequest {
  RepositoryHeader repository = 1;
  repeated RefUpdateEntry updates = 2;
}

message UpdateReferencesResponse {
  repeated string failed_refs = 1;
  string error = 2;
}

message DeleteRefsRequest {
  RepositoryHeader repository = 1;
  repeated string ref_names = 2;
}

message DeleteRefsResponse {
  repeated string failed_refs = 1;
  string error = 2;
}


message FindRefsByOIDRequest {
  RepositoryHeader repository = 1;
  string oid = 2;
  RefFilter filter = 3;
}

message RefFilter {
  repeated string prefixes = 1; // e.g. ["refs/heads/", "refs/tags/"]
  uint32 limit = 2;
}

message FoundRef {
  string ref_name = 1;
  string target_oid = 2;
  bool symbolic = 3;
  string symbolic_target = 4;
}

message FindRefsByOIDResponse {
  repeated FoundRef refs = 1;
}


message ListRefsRequest {
  RepositoryHeader repository = 1;
  repeated string prefixes = 2;
  string pattern = 3;    // glob pattern, e.g. "refs/heads/*"
  repeated string containing_oids = 4;
  SortDirection sort_direction = 5;
  Pagination pagination = 6;
}

message ListRefsResponse {
  repeated FoundRef refs = 1;
  PageInfo page_info = 2;
}

service RefService {
  rpc FindDefaultBranchName(FindDefaultBranchNameRequest) returns (FindDefaultBranchNameResponse);
  rpc RefExists(RefExistsRequest) returns (RefExistsResponse);
  rpc UpdateReferences(UpdateReferencesRequest) returns (UpdateReferencesResponse);
  rpc DeleteRefs(DeleteRefsRequest) returns (DeleteRefsResponse);
  rpc FindRefsByOID(FindRefsByOIDRequest) returns (FindRefsByOIDResponse);
  rpc ListRefs(ListRefsRequest) returns (ListRefsResponse);
}