feat(utils): add file utility functions for MD5 hashing, file ID generation, and upload directory management

pkg/utils/file.go

@@ -0,0 +1,70 @@
+package utils
+
+import (
+	"bufio"
+	"crypto/md5"
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+
+	"github.com/dustin/go-humanize"
+)
+
+func GetFileId(fileHash string, fileSize int64) string {
+	return fmt.Sprintf("%s_%d", fileHash, fileSize)
+}
+
+func GetFileMd5(file io.Reader) (string, error) {
+	const bufferSize = 1024 * 1000 // 1MB
+	hash := md5.New()
+	buf := make([]byte, bufferSize)
+	reader := bufio.NewReader(file)
+	for {
+		n, err := reader.Read(buf)
+		if err != nil {
+			if err == io.EOF {
+				break
+			}
+			return "", err
+		}
+		hash.Write(buf[:n])
+	}
+	return fmt.Sprintf("%x", hash.Sum(nil)), nil
+}
+
+func GetUploadDirPath() (string, error) {
+	uploadPath := GetEnv("upload.path")
+	if uploadPath == "" {
+		basepath, err := os.Getwd()
+		if err != nil {
+			return "", err
+		}
+		uploadPath = filepath.Join(basepath, "uploads")
+	}
+	if err := os.MkdirAll(uploadPath, 0755); err != nil {
+		return "", err
+	}
+	return uploadPath, nil
+}
+
+func GetFileSize(size string) (uint64, error) {
+	return humanize.ParseBytes(size)
+}
+
+func CopyFile(src, dst string) error {
+	sourceFile, err := os.Open(src)
+	if err != nil {
+		return err
+	}
+	defer sourceFile.Close()
+
+	destFile, err := os.Create(dst)
+	if err != nil {
+		return err
+	}
+	defer destFile.Close()
+
+	_, err = io.Copy(destFile, sourceFile)
+	return err
+}

pkg/utils/go.mod

@@ -3,6 +3,7 @@ module pkg/utils
 go 1.25.5
 
 require (
+	github.com/dustin/go-humanize v1.0.1
 	github.com/hibiken/asynq v0.25.1
 	github.com/redis/go-redis/v9 v9.17.3
 	github.com/spf13/viper v1.21.0

pkg/utils/go.sum

@@ -6,6 +6,7 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f h1:lO4WD4F/rVNCu3HqELle0jiPLLBs70cWOduZpkS1E78=
 github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f/go.mod h1:cuUVRXasLTGF7a8hSLbxyZXjz+1KgoB3wDUb6vlszIc=
+github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
 github.com/frankban/quicktest v1.14.6 h1:7Xjx+VpznH+oBnejlPUj8oUpdxnVs4f8XU8WnHkI4W8=
 github.com/fsnotify/fsnotify v1.9.0 h1:2Ml+OJNzbYCTzsxtv8vKSFD9PbJjmhYF14k/jKC7S9k=
 github.com/fsnotify/fsnotify v1.9.0/go.mod h1:8jBTzvmWwFyi3Pb8djgCCO5IBqzKJ/Jwo8TRcHyHii0=