Go-BackendServerTemplate/tool/utils/fileutils/write.go

// Copyright 2025 BackendServerTemplate Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.

package fileutils

import (
	"github.com/SongZihuan/BackendServerTemplate/tool/utils/cleanstringutils"
	"os"
	"strings"
)

func Write(filePath string, dat string) error {
	// 尝试打开文件
	file, err := os.OpenFile(filePath, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0644)
	if err != nil {
		return err
	}
	defer func() {
		_ = file.Close()
	}()
	_, err = file.Write([]byte(dat))
	return err
}

func AppendOnExistsFile(filePath string, dat string) error {
	// 尝试打开文件（若文件不存在则返回错误）
	file, err := os.OpenFile(filePath, os.O_APPEND|os.O_WRONLY, 0644)
	if err != nil {
		return err
	}
	defer func() {
		_ = file.Close()
	}()
	_, err = file.Write([]byte(dat))
	return err
}

// CheckFileByLine 检查文件每一行，若fn返回 true 则本函数返回 true，否则返回false。
// 传入 fn 的字符串不以 \n 结尾，空字符串也会传入
func CheckFileByLine(filePath string, fn func(string) bool) (bool, error) {
	dat, err := os.ReadFile(filePath)
	if err != nil {
		return false, err
	}

	fileLine := strings.Split(cleanstringutils.GetString(string(dat)), "\n")
	for _, l := range fileLine {
		if fn(l) {
			return true, nil
		}
	}

	return false, nil
}