From da134e32a121b815437fbe575130d799bbfdd096 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=99=BD=E8=8C=B6=E6=B8=85=E6=AC=A2?=
 <go_developer@163.com>
Date: Sun, 22 May 2022 13:45:01 +0800
Subject: [PATCH] =?UTF-8?q?=E5=A2=9E=E5=8A=A0=E6=96=87=E4=BB=B6=E7=9B=B8?=
 =?UTF-8?q?=E5=85=B3=E6=93=8D=E4=BD=9C?=
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---
 file.go | 145 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 145 insertions(+)
 create mode 100644 file.go

diff --git a/file.go b/file.go
new file mode 100644
index 0000000..28ea6dd
--- /dev/null
+++ b/file.go
@@ -0,0 +1,145 @@
+// Package command ...
+//
+// Description : 文件相关操作
+//
+// Author : go_developer@163.com<白茶清欢>
+//
+// Date : 2022-05-22 12:23
+package command
+
+import (
+	"errors"
+	"os"
+	"strings"
+)
+
+// File ...
+//
+// Author : go_developer@163.com<白茶清欢>
+//
+// Date : 12:25 2022/5/22
+func File(workDir string, filePath string) *fileOperate {
+	if len(workDir) == 0 {
+		workDir, _ = os.Getwd()
+	}
+	if !strings.HasPrefix(filePath, "/") {
+		filePath = strings.ReplaceAll(workDir+"/"+filePath, "//", "/")
+	}
+	return &fileOperate{
+		workDir:    workDir,
+		filePath:   filePath,
+		permission: 0644,
+		openFlag:   os.O_RDONLY,
+	}
+}
+
+// file ...
+//
+// Author : go_developer@163.com<白茶清欢>
+//
+// Date : 12:24 2022/5/22
+type fileOperate struct {
+	workDir     string
+	filePath    string
+	autoCreate  bool
+	permission  os.FileMode
+	openFlag    int
+	fileHandler *os.File
+}
+
+// IsExist 文件是否存在
+//
+// Author : go_developer@163.com<白茶清欢>
+//
+// Date : 12:30 2022/5/22
+func (f *fileOperate) IsExist() (bool, bool, error) {
+	fileState, err := os.Stat(f.filePath)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return false, false, nil
+		}
+		return false, false, err
+	}
+	return true, fileState.IsDir(), nil
+}
+
+// AutoCreate 文件不存在时自动创建
+//
+// Author : go_developer@163.com<白茶清欢>
+//
+// Date : 12:28 2022/5/22
+func (f *fileOperate) AutoCreate() *fileOperate {
+	f.autoCreate = true
+	return f
+}
+
+// Permission 设置文件权限
+//
+// Author : go_developer@163.com<白茶清欢>
+//
+// Date : 13:00 2022/5/22
+func (f *fileOperate) Permission(fileModel os.FileMode) *fileOperate {
+	f.permission = fileModel
+	return f
+}
+
+// SetOpenFlag ...
+//
+// Author : go_developer@163.com<白茶清欢>
+//
+// Date : 13:40 2022/5/22
+func (f *fileOperate) SetOpenFlag(flagList ...int) *fileOperate {
+	for _, flag := range flagList {
+		f.openFlag = f.openFlag | flag
+	}
+	return f
+}
+
+// Create 创建文件
+//
+// Author : go_developer@163.com<白茶清欢>
+//
+// Date : 13:04 2022/5/22
+func (f *fileOperate) Create() error {
+
+	var (
+		fileExist bool
+		isDir     bool
+		err       error
+	)
+
+	if fileExist, isDir, err = f.IsExist(); nil != err {
+		return err
+	}
+
+	if isDir {
+		return errors.New("路径已存在, 且为目录 : " + f.filePath)
+	}
+
+	if !fileExist {
+		// 文件不存在
+		if !f.autoCreate {
+			return errors.New("文件不存在, 且不允许自动创建 : " + f.filePath)
+		}
+	}
+	f.fileHandler, err = os.OpenFile(f.filePath, f.openFlag, f.permission)
+	return err
+}
+
+// Open 打开文件
+//
+// Author : go_developer@163.com<白茶清欢>
+//
+// Date : 13:22 2022/5/22
+func (f *fileOperate) Open() error {
+	return f.Create()
+}
+
+// GetFileHandler 获取文件处理句柄
+//
+// Author : go_developer@163.com<白茶清欢>
+//
+// Date : 13:23 2022/5/22
+func (f *fileOperate) GetFileHandler() *os.File {
+	return f.fileHandler
+}