client_info.go

// Licensed to ClickHouse, Inc. under one or more contributor
// license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright
// ownership. ClickHouse, Inc. licenses this file to you 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.

package clickhouse

import (
	"fmt"
	"runtime"
	"sort"
	"strings"

	"github.com/xiaoxiaolai/clickhouse-go/lib/proto"
)

const ClientName = "clickhouse-go"

const (
	ClientVersionMajor       = 2
	ClientVersionMinor       = 5
	ClientVersionPatch       = 1
	ClientTCPProtocolVersion = proto.DBMS_TCP_PROTOCOL_VERSION
)

type ClientInfo struct {
	Products []struct {
		Name    string
		Version string
	}

	comment []string
}

func (o ClientInfo) String() string {
	var s strings.Builder

	info := o

	info.Products = append(info.Products, struct{ Name, Version string }{
		Name:    ClientName,
		Version: fmt.Sprintf("%d.%d.%d", ClientVersionMajor, ClientVersionMinor, ClientVersionPatch),
	})

	encodedProducts := make([]string, len(info.Products))
	for i, product := range info.Products {
		encodedProducts[i] = fmt.Sprintf("%s/%s", product.Name, product.Version)
	}
	s.WriteString(strings.Join(encodedProducts, " "))

	lvMeta := "lv:go/" + runtime.Version()[2:]
	osMeta := "os:" + runtime.GOOS

	chunks := append(info.comment, lvMeta, osMeta)

	s.WriteByte(' ')
	s.WriteByte('(')
	s.WriteString(strings.Join(chunks, "; "))
	s.WriteByte(')')

	return s.String()
}

func mapKeysInOrder[V any](m map[string]V) []string {
	keys := make([]string, 0, len(m))
	for key, _ := range m {
		keys = append(keys, key)
	}

	sort.Slice(keys, func(i, j int) bool {
		return keys[i] < keys[j]
	})

	return keys
}