syntax = "proto3";

package api;

option go_package = "github.com/psviderski/uncloud/api/pb";

import "google/protobuf/empty.proto";
import "google/protobuf/timestamp.proto";
import "api/pb/common.proto";

// CaddyStorage exposes the CertMagic storage operations backed by the distributed cluster store.
// See Storage interface in https://github.com/caddyserver/certmagic/blob/master/storage.go.
service CaddyStorage {
  rpc Store(StoreCaddyStorageRequest) returns (google.protobuf.Empty);
  rpc Load(LoadCaddyStorageRequest) returns (LoadCaddyStorageResponse);
  rpc Delete(DeleteCaddyStorageRequest) returns (EmptyResponse);
  rpc List(ListCaddyStorageRequest) returns (ListCaddyStorageResponse);
  rpc Stat(StatCaddyStorageRequest) returns (StatCaddyStorageResponse);
}

message StoreCaddyStorageRequest {
  string key = 1;
  bytes value = 2;
}

message LoadCaddyStorageRequest {
  string key = 1;
}

message LoadCaddyStorageResponse {
  // Must contain only one repeated messages field to allow broadcasting Load requests to multiple machines.
  repeated MachineCaddyStorageValue messages = 1;
}

message MachineCaddyStorageValue {
  Metadata metadata = 1;
  bytes value = 2;
  google.protobuf.Timestamp updated_at = 3;
}

message DeleteCaddyStorageRequest {
  string key = 1;
}

message ListCaddyStorageRequest {
  string prefix = 1;
  bool recursive = 2;
}

message ListCaddyStorageResponse {
  // Must contain only one repeated messages field to allow broadcasting List requests to multiple machines.
  repeated MachineCaddyStorageKeys messages = 1;
}

message MachineCaddyStorageKeys {
  Metadata metadata = 1;
  repeated string keys = 2;
}

message StatCaddyStorageRequest {
  string key = 1;
}

message StatCaddyStorageResponse {
  // Must contain only one repeated messages field to allow broadcasting Stat requests to multiple machines.
  repeated MachineCaddyStorageKeyInfo messages = 1;
}

message MachineCaddyStorageKeyInfo {
  Metadata metadata = 1;
  string key = 2;
  google.protobuf.Timestamp updated_at = 3;
  int64 size = 4;
  bool is_terminal = 5;
}