syntax = "proto3";

option go_package = "./";
package am;

import "google/protobuf/empty.proto";

message Principal {
  string id = 1;
}

message CheckRequest {
  string ns = 1;
  string obj = 2;
  string rel = 3;
  string userId = 4;
  string ts = 5;
}

message CheckResponse {
  optional Principal principal = 1;
  bool ok = 2;
}

message ContentChangeCheckRequest {
  string ns = 1;
  string obj = 2;
  string rel = 3;
  string userId = 4;
}
message ContentChangeCheckResponse {
  bool ok = 2;
  string ts = 3;
}

message ListRequest {
  string ns = 1;
  string rel = 3;
  string userId = 4;
  string ts = 5;
}

message ListResponse {
  repeated string objs = 1;
}

service CheckService {
  rpc check (CheckRequest) returns (CheckResponse);
  rpc content_change_check (ContentChangeCheckRequest) returns (ContentChangeCheckResponse);
  rpc list (ListRequest) returns (ListResponse);
  rpc read (ReadRequest) returns (ReadResponse);
  rpc write (WriteRequest) returns (WriteResponse);
}


message UserSet {
  string ns = 1;
  string obj = 2;
  string rel = 3;
}

message Tuple {
  string ns = 1;
  string obj = 2;
  string rel = 3;
  oneof user {
    string userId = 4;
    UserSet userSet = 5;
  }
  oneof condition {
    int64 expires = 6;
  }
}


message TupleSet {
  message TupleSpec {
    string obj = 1;
    string rel = 2;
    oneof user {
      string user_id = 3;
      UserSet user_set = 4;
    }
  }
  message ObjectSpec {
    string obj = 1;
    optional string rel = 2;
  }
  message UserSetSpec {
    string user_set = 1;
    optional string rel = 2;
  }

  string ns = 1;
  oneof spec {
    TupleSpec tuple_spec = 2;
    ObjectSpec object_spec = 3;
    //UserSetSpec userset_spec = 5;
  }
}

message ReadRequest {
  optional string ts = 1;
  repeated TupleSet tuple_sets = 2;
}

message ReadResponse {
  string ts = 1;
  repeated Tuple tuples = 2;
}

message WriteRequest {
  optional string ts = 1;
  repeated Tuple add_tuples = 2;
  repeated Tuple del_tuples = 3;
}

message WriteResponse {
  string ts = 1;
}