Add file stat method

osutils/files.go

@@ -1,6 +1,9 @@
 package osutils
 
 import (
+	"crypto/sha1"
+	"encoding/hex"
+	"io"
 	"io/fs"
 	"io/ioutil"
 	"log"
@@ -59,3 +62,56 @@ func GetParentDir(filePath string) (string, error) {
 	finalPath := path.Join("/", path.Join(cuttedPath...))
 	return finalPath, nil
 }
+
+type FileValidationInfo struct {
+	Path string
+	fs.FileInfo
+	SHA1 string
+}
+
+func ValidateFile(filePath string) (FileValidationInfo, error) {
+	info := FileValidationInfo{
+		Path:     filePath,
+		FileInfo: nil,
+		SHA1:     "",
+	}
+	info.Path = filePath
+
+	hash, err := GetFileHash(filePath)
+	if err != nil {
+		return info, err
+	}
+	info.SHA1 = hash
+
+	return info, nil
+}
+
+func GetFileHash(filePath string) (string, error) {
+	//Initialize variable returnMD5String now in case an error has to be returned
+	var returnSHA1String string
+
+	//Open the filepath passed by the argument and check for any error
+	file, err := os.Open(filePath)
+	if err != nil {
+		return "", err
+	}
+
+	//Tell the program to call the following function when the current function returns
+	defer file.Close()
+
+	//Open a new SHA1 hash interface to write to
+	hash := sha1.New()
+
+	//Copy the file in the hash interface and check for any error
+	if _, err := io.Copy(hash, file); err != nil {
+		return returnSHA1String, err
+	}
+
+	//Get the 20 bytes hash
+	hashInBytes := hash.Sum(nil)[:20]
+
+	//Convert the bytes to a string
+	returnSHA1String = hex.EncodeToString(hashInBytes)
+
+	return returnSHA1String, nil
+}