Add MultiPartFileHeaderToBase64 function

parsing.go

@@ -1,8 +1,12 @@
 package ersteller_lib
 
 import (
+	"encoding/base64"
 	"fmt"
+	"io"
+	"mime/multipart"
 	"strconv"
+	"strings"
 	"time"
 )
 
@@ -87,3 +91,37 @@ func MoneyCentsToString(money int, currency string, lang Language) string {
 	}
 	return fmt.Sprintf("%s%d.%02d", currency, beforeDecimals, afterDecimals)
 }
+
+func MultiPartFileHeaderToBase64(fileHeader *multipart.FileHeader) (string, error) {
+	// Open the uploaded file
+	src, err := fileHeader.Open()
+	if err != nil {
+		return "", fmt.Errorf("failed to open uploaded file: %v", err)
+	}
+	defer src.Close()
+
+	// Read the file content
+	fileContent, err := io.ReadAll(src)
+	if err != nil {
+		return "", fmt.Errorf("failed to read file content: %v", err)
+	}
+
+	// Encode the image to base64
+	base64Image := base64.StdEncoding.EncodeToString(fileContent)
+
+	// Determine the MIME type based on file extension
+	filename := strings.ToLower(fileHeader.Filename)
+	var mimeType string
+	if strings.HasSuffix(filename, ".jpg") || strings.HasSuffix(filename, ".jpeg") {
+		mimeType = "image/jpeg"
+	} else if strings.HasSuffix(filename, ".png") {
+		mimeType = "image/png"
+	} else if strings.HasSuffix(filename, ".gif") {
+		mimeType = "image/gif"
+	} else {
+		return "", fmt.Errorf("unsupported image format")
+	}
+
+	// Create the image data URL
+	return fmt.Sprintf("data:%s;base64,%s", mimeType, base64Image), nil
+}