/*
 * Copyright (C) 2023 Dgraph Labs, Inc. and Contributors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

// Style guide for Protocol Buffer 3.
// Use CamelCase (with an initial capital) for message names – for example,
// SongServerRequest. Use underscore_separated_names for field names – for
// example, song_name.

syntax = "proto3";

package api;

/* import "gogoproto/gogo.proto"; */

/* option (gogoproto.marshaler_all) = true; */
/* option (gogoproto.sizer_all) = true; */
/* option (gogoproto.unmarshaler_all) = true; */
/* option (gogoproto.goproto_getters_all) = true; */

option java_package = "io.dgraph";
option java_outer_classname = "DgraphProto";

// Graph response.
service Dgraph {
	rpc Login (LoginRequest)       returns (Response) {}
	rpc Query (Request)            returns (Response) {}
	rpc Alter (Operation)          returns (Payload) {}
	rpc CommitOrAbort (TxnContext) returns (TxnContext) {}
	rpc CheckVersion(Check)        returns (Version) {}
}

message Request {
	uint64 start_ts = 1;

	string query = 4;
	map<string, string> vars = 5; // Support for GraphQL like variables.
	bool read_only = 6;
	bool best_effort = 7;

	repeated Mutation mutations = 12;
	bool commit_now = 13;
	enum RespFormat {
		JSON = 0;
		RDF = 1;
	}
	RespFormat resp_format = 14;
	string hash = 15;
}

message Uids {
	repeated string uids = 1;
}

message ListOfString {
    repeated string value = 1;
}

message Response {
	bytes json = 1;
	TxnContext txn = 2;
	Latency latency = 3;
	// Metrics contains all metrics related to the query.
	Metrics metrics = 4;
	// uids contains a mapping of blank_node => uid for the node. It only returns uids
	// that were created as part of a mutation.
	map<string, string> uids = 12;
	bytes rdf = 13;
	map<string, ListOfString> hdrs = 14;
}

message Mutation {
	bytes set_json = 1;
	bytes delete_json = 2;
	bytes set_nquads = 3;
	bytes del_nquads = 4;
	repeated NQuad set = 5;
	repeated NQuad del = 6;

	// This is being used for upserts.
	string cond = 9;

	// This field is a duplicate of the one in Request and placed here for convenience.
	bool commit_now = 14;
}

message Operation {
	string schema = 1;
	string drop_attr = 2;
	bool drop_all = 3;

	enum DropOp {
		NONE = 0;
		ALL = 1;
		DATA = 2;
		ATTR = 3;
		TYPE = 4;
	}
	DropOp drop_op = 4;

	// If drop_op is ATTR or TYPE, drop_value holds the name of the predicate or
	// type to delete.
	string drop_value = 5;

	// run indexes in background.
	bool run_in_background = 6;
}

// Worker services.
message Payload {
	bytes Data = 1;
}

message TxnContext {
	uint64 start_ts = 1;
	uint64 commit_ts = 2;
	bool aborted = 3;
	repeated string keys = 4;  // List of keys to be used for conflict detection.
	repeated string preds = 5; // List of predicates involved in this transaction.
	string hash = 6;
}

message Check {}

message Version {
	string tag = 1;
}

message Latency {
	uint64 parsing_ns = 1;
	uint64 processing_ns = 2;
	uint64 encoding_ns = 3;
	uint64 assign_timestamp_ns = 4;
	uint64 total_ns = 5;
}

message Metrics {
	// num_uids is the map of number of uids processed by each attribute.
	map<string, uint64> num_uids = 1;
}

message NQuad {
	reserved 5; // This was used for label.
	string subject = 1;
	string predicate = 2;
	string object_id = 3;
	Value object_value = 4;
	string lang = 6;
	repeated Facet facets = 7;
	uint64 namespace = 8;
}

message Value {
	oneof val {
		string default_val = 1;
		bytes bytes_val = 2;
		int64 int_val = 3;
		bool bool_val = 4;
		string str_val = 5;
		double double_val = 6;
		bytes geo_val = 7;  // Geo data in WKB format
		bytes date_val = 8;
		bytes datetime_val = 9;
		string password_val = 10;
		uint64 uid_val=11;
	}
}

message Facet {
	enum ValType {
		STRING = 0;
		INT = 1;
		FLOAT = 2;
		BOOL = 3;
		DATETIME = 4;
	}

	string key = 1;
	bytes value = 2;
	ValType val_type = 3;
	repeated string tokens = 4; // tokens of value.
	string alias = 5; // not stored, only used for query.
}

message LoginRequest {
	string userid = 1;
	string password = 2;
	string refresh_token = 3;
	uint64 namespace = 4;
}

message Jwt {
	string access_jwt = 1;
	string refresh_jwt = 2;
}

// vim: noexpandtab sw=2 ts=2