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

package db;

option go_package = "./proto;db";

service Db {
	rpc Create(CreateRequest) returns (CreateResponse) {}
	rpc Read(ReadRequest) returns (ReadResponse) {}
	rpc Update(UpdateRequest) returns (UpdateResponse) {}
	rpc Delete(DeleteRequest) returns (DeleteResponse) {}
	rpc Truncate(TruncateRequest) returns (TruncateResponse) {}
	rpc Count(CountRequest) returns (CountResponse) {}
	rpc RenameTable(RenameTableRequest) returns (RenameTableResponse) {}
	rpc ListTables(ListTablesRequest) returns (ListTablesResponse) {}
	rpc DropTable(DropTableRequest) returns (DropTableResponse) {}
}


// Read data from a table. Lookup can be by ID or via querying any field in the record.
message ReadRequest {
	// Optional table name. Defaults to 'default'
	string table = 1;
	// Read by id. Equivalent to 'id == "your-id"'
	string id = 2;
	// Examples: 'age >= 18', 'age >= 18 and verified == true'
	// Comparison operators: '==', '!=', '<', '>', '<=', '>='
	// Logical operator: 'and'
	// Dot access is supported, eg: 'user.age == 11'
	// Accessing list elements is not supported yet.
	string query = 3;
	int32 offset = 4;
	// Maximum number of records to return. Default limit is 25.
	// Maximum limit is 1000. Anything higher will return an error.
	int32 limit = 5;
	// field name to order by
	string orderBy = 6;
	// 'asc' (default), 'desc'
	string order = 7;
}

message ReadResponse {
	// JSON encoded records
	repeated google.protobuf.Struct records = 1;
}

// Create a record in the database. Optionally include an "id" field otherwise it's set automatically.
message CreateRequest {
	// Optional table name. Defaults to 'default'
	string table = 1;
	// JSON encoded record or records (can be array or object)
	google.protobuf.Struct record = 2;
	// optional record id to use
	string id = 3;
}

message CreateResponse {
	// The id of the record (either specified or automatically created)
	string id = 1;
}

// Update a record in the database. Include an "id" in the record to update.
message UpdateRequest {
	// Optional table name. Defaults to 'default'
	string table = 1;
	// The id of the record. If not specified it is inferred from the 'id' field of the record
	string id = 2;
	// record, JSON object
	google.protobuf.Struct record = 3;
}

message UpdateResponse {}

// Delete a record in the database by id.
message DeleteRequest {
	// Optional table name. Defaults to 'default'
	string table = 1;
	// id of the record
	string id = 2;
}

message DeleteResponse {

}

// Truncate the records in a table
message TruncateRequest {
	string table = 1;
}

message TruncateResponse {
}

// Count records in a table
message CountRequest {
	// specify the table name
	string table = 1;
}

message CountResponse {
	// the number of records in the table
	int32 count = 1;
}

// Rename a table
message RenameTableRequest {
	// current table name
	string from = 1;
	// new table name
	string to = 2;
}

message RenameTableResponse {

}

// List tables in the DB
message ListTablesRequest {

}

message ListTablesResponse {
	// list of tables
	repeated string tables = 1;
}

// Drop a table in the DB
message DropTableRequest {
	string table = 1;
}

message DropTableResponse {
}