使用基類模型（class model）優化代碼：從零到掌握 DRY 原則

from django.db import models
from utils.image_processing import convert_and_upload_to_webp
import boto3
from django.conf import settings

class WebPImageModelMixin(models.Model):
    """
    用於將圖片轉換為 WebP 格式並上傳到 S3 的基類
    """

    class Meta:
        abstract = True

    def process_and_upload_image(self, image_file, folder_name):
        """
        將圖片轉換為 WebP 格式並上傳到 S3，同時清理原始圖片。

        參數：
        - image_file: 要處理的圖片檔案
        - folder_name: S3 存儲文件夾名稱

        返回：
        - 處理後圖片的 S3 路徑
        """
        original_filename = image_file.name
        new_image_path = convert_and_upload_to_webp(image_file, folder_name)
        image_file.name = new_image_path

        # 從 S3 中刪除原始文件
        if original_filename:
            s3 = boto3.client("s3", region_name=settings.AWS_S3_REGION_NAME)
            s3.delete_object(Bucket=settings.AWS_STORAGE_BUCKET_NAME, Key=original_filename)

from django.contrib.auth.models import User
from django.db import models
from mixins import WebPImageModelMixin

class Profile(WebPImageModelMixin, models.Model):
    user = models.OneToOneField(User, on_delete=models.CASCADE, related_name="profile")
    photo = models.ImageField(upload_to="profile_photos/", blank=True, null=True)
    bio = models.TextField(max_length=200, null=True)
    location = models.CharField(max_length=50, null=True)
    is_client = models.BooleanField(default=True, null=True)
    is_freelancer = models.BooleanField(default=False, null=True)
    freelancer_verified = models.BooleanField(default=False, null=True)

    def save(self, *args, **kwargs):
        super().save(*args, **kwargs)
        if self.photo:
            self.process_and_upload_image(self.photo, "profile_photos/")

    def __str__(self):
        return f"{self.user.username}'s Profile"