v3 - main to cut out

pkg/utils/file.go

@@ -0,0 +1,39 @@
+package utils
+
+import (
+	"Open_IM/pkg/common/constant"
+	"fmt"
+	"math/rand"
+	"os"
+	"path"
+	"time"
+)
+
+// Determine whether the given path is a folder
+func IsDir(path string) bool {
+	s, err := os.Stat(path)
+	if err != nil {
+		return false
+	}
+	return s.IsDir()
+}
+
+// Determine whether the given path is a file
+func IsFile(path string) bool {
+	return !IsDir(path)
+}
+
+// Create a directory
+func MkDir(path string) error {
+	return os.MkdirAll(path, os.ModePerm)
+}
+
+func GetNewFileNameAndContentType(fileName string, fileType int) (string, string) {
+	suffix := path.Ext(fileName)
+	newName := fmt.Sprintf("%d-%d%s", time.Now().UnixNano(), rand.Int(), fileName)
+	contentType := ""
+	if fileType == constant.ImageType {
+		contentType = "image/" + suffix[1:]
+	}
+	return newName, contentType
+}