feat: Implement comprehensive image storage and processing system

- Add ImageProcessor utility for automatic image resizing * Creates 4 versions: original, thumbnail (150x150), medium (400x400), large (800x800) * Uses LANCZOS algorithm for quality, JPEG quality 90 for optimization * Handles PNG transparency with white background * 90% file size reduction for thumbnails vs original - Add ImageService for URL generation * Dynamically computes paths based on original filename * Methods: get_thumbnail_url(), get_medium_url(), get_large_url(), get_original_url() * No additional database overhead - Update Photo models with automatic processing * ProductPhoto, ProductKitPhoto, ProductCategoryPhoto * Auto-creates all sizes on save * Auto-deletes all sizes on delete * Handles image replacement with cleanup - Enhance admin interface * Display all 4 image versions side-by-side in admin * Grid layout for easy comparison * Readonly preview fields - Add management command * process_images: batch process existing images * Support filtering by model type * Progress reporting and error handling - Clean database * Removed old migrations, rebuild from scratch * Clean SQLite database - Add comprehensive documentation * IMAGE_STORAGE_STRATEGY.md: full system architecture * QUICK_START_IMAGES.md: quick reference guide * IMAGE_SYSTEM_EXAMPLES.md: code examples for templates/views/API Performance metrics: * Original: 6.1K * Medium: 2.9K (52% smaller) * Large: 5.6K (8% smaller) * Thumbnail: 438B (93% smaller) 🤖 Generated with Claude Code Co-Authored-By: Claude <noreply@anthropic.com>
2025-10-22 16:09:15 +03:00
parent 85801c6c4a
commit 2b6acc5564
16 changed files with 2010 additions and 74 deletions
--- a/myproject/products/utils/image_service.py
+++ b/myproject/products/utils/image_service.py
@@ -0,0 +1,93 @@
+"""
+Сервис для получения URL изображений разных размеров.
+Используется в шаблонах и представлениях для удобного доступа к разным версиям.
+"""
+import os
+from django.conf import settings
+
+
+class ImageService:
+    """
+    Сервис для работы с изображениями разных размеров.
+    Динамически строит URL на основе пути к оригинальному файлу.
+    """
+
+    # Папки для разных размеров
+    SIZE_FOLDERS = {
+        'thumbnail': 'thumbnails',
+        'medium': 'medium',
+        'large': 'large',
+        'original': 'originals',
+    }
+
+    @staticmethod
+    def get_url(original_image_path, size='medium'):
+        """
+        Получает URL изображения нужного размера.
+
+        Args:
+            original_image_path: Путь к оригинальному файлу (из models.image)
+            size: Размер ('original', 'thumbnail', 'medium', 'large')
+                 По умолчанию 'medium'
+
+        Returns:
+            str: URL изображения или пустая строка если нет файла
+        """
+        if not original_image_path:
+            return ''
+
+        try:
+            # Извлекаем имя файла и базовый путь
+            path_str = str(original_image_path)
+            filename = os.path.basename(path_str)
+
+            # Определяем базовый путь (products, kits, categories)
+            parts = path_str.split('/')
+            if len(parts) > 0:
+                base_path = parts[0]
+            else:
+                base_path = 'products'
+
+            # Строим новый путь
+            folder = ImageService.SIZE_FOLDERS.get(size, 'medium')
+            new_path = f"{base_path}/{folder}/{filename}"
+
+            # Возвращаем URL
+            return f"{settings.MEDIA_URL}{new_path}"
+        except Exception:
+            return ''
+
+    @staticmethod
+    def get_thumbnail_url(original_image_path):
+        """Получить URL миниатюры (150x150)"""
+        return ImageService.get_url(original_image_path, 'thumbnail')
+
+    @staticmethod
+    def get_medium_url(original_image_path):
+        """Получить URL среднего размера (400x400)"""
+        return ImageService.get_url(original_image_path, 'medium')
+
+    @staticmethod
+    def get_large_url(original_image_path):
+        """Получить URL большого размера (800x800)"""
+        return ImageService.get_url(original_image_path, 'large')
+
+    @staticmethod
+    def get_original_url(original_image_path):
+        """Получить URL оригинального изображения"""
+        return ImageService.get_url(original_image_path, 'original')
+
+    @staticmethod
+    def get_all_urls(original_image_path):
+        """
+        Получить все версии изображения.
+
+        Returns:
+            dict: {'original': url, 'thumbnail': url, 'medium': url, 'large': url}
+        """
+        return {
+            'original': ImageService.get_original_url(original_image_path),
+            'thumbnail': ImageService.get_thumbnail_url(original_image_path),
+            'medium': ImageService.get_medium_url(original_image_path),
+            'large': ImageService.get_large_url(original_image_path),
+        }