syntax = "proto3";
import "google/protobuf/empty.proto";

option go_package = "./postal";

service Postal {
  rpc Deliver(ReqDeliver) returns (ResDeliver);
  rpc DeliverBatch(ReqDeliverBatch) returns(ResDeliver);
  rpc DeliverGroup(ReqDeliverGroup) returns(ResDeliver);

  rpc GroupCreate(ReqGroupCreate) returns(ResGroupCreate);
  rpc GroupJoin(ReqGroupJoin) returns(google.protobuf.Empty);
  rpc GroupLeave(ReqGroupLeave) returns(google.protobuf.Empty);
  rpc GroupDissolve(ReqGroupDissolve) returns(google.protobuf.Empty);
}

message Message {
  int64 time = 3;
  int32 svcNo = 4;
  int32 msgNo = 5;
  bytes body = 6; // protobuf bytes
}

message ReqDeliver {
  string receiver = 1;
  Message msg = 2;

  // bool sync = 7; // 是否同步阻塞等待投递结果, 默认false立即返回放到队列消费投递
}

message ResDeliver {
  bool ok = 1;
  int32 code = 2;
  string msg = 3;
}

message ReqDeliverBatch {
  repeated string receivers = 1;
  Message msg = 2;
}

message ReqDeliverGroup {
  string gid = 1;
  Message msg = 2;
}

message ReqGroupCreate {
  string gid = 1; // 群id
  map<string, string> tags = 3; // 群标签...

  bool persistent = 7; // 群关系是否持久化, 默认否
}

message ResGroupCreate {
  string gid = 1; // 群id
}

message ReqGroupJoin {
  string gid = 1;
  string uid = 2;
}

message ReqGroupLeave {
  string gid = 1;
  string uid = 2;
}

message ReqGroupDissolve {
  string gid = 1;
}