feat: timeline and folder import

backend/app/routers/photos.py

@@ -10,6 +10,9 @@ from sqlalchemy import select, and_, or_, func
 from sqlalchemy.ext.asyncio import AsyncSession
 import json
 import os
+import logging
+
+logger = logging.getLogger(__name__)
 
 from app.database import get_db
 from app.models import Photo, Folder, Tag, PhotoTag
@@ -164,10 +167,51 @@ async def get_thumbnail(
     if not photo:
         raise HTTPException(status_code=404, detail="Photo not found")
     
-    thumb_path = getattr(photo, f'thumb_{size}')
+    # Check if thumbnail exists, generate if not
+    thumb_dir = f"/data/thumbs/{photo_id}"
+    thumb_path = f"{thumb_dir}/{size}.webp"
     
-    if not thumb_path or not os.path.exists(thumb_path):
-        raise HTTPException(status_code=404, detail="Thumbnail not found")
+    if not os.path.exists(thumb_path):
+        # Generate thumbnail on demand
+        from app.tasks.thumbs import generate_thumbnails
+        generate_thumbnails.delay(photo_id)
+        
+        # For now, return a placeholder or the original with reduced quality
+        if os.path.exists(photo.filepath):
+            from PIL import Image
+            try:
+                os.makedirs(thumb_dir, exist_ok=True)
+                img = Image.open(photo.filepath)
+                
+                # Auto-rotate based on EXIF
+                from PIL import ExifTags
+                try:
+                    for orientation in ExifTags.TAGS.keys():
+                        if ExifTags.TAGS[orientation] == 'Orientation':
+                            break
+                    exif = img._getexif()
+                    if exif is not None:
+                        orient = exif.get(orientation)
+                        if orient == 3:
+                            img = img.rotate(180, expand=True)
+                        elif orient == 6:
+                            img = img.rotate(270, expand=True)
+                        elif orient == 8:
+                            img = img.rotate(90, expand=True)
+                except:
+                    pass
+                
+                # Generate thumbnail size
+                sizes = {'small': 150, 'medium': 400, 'large': 800}
+                target_size = sizes.get(size, 400)
+                img.thumbnail((target_size, target_size), Image.Resampling.LANCZOS)
+                
+                # Save as WebP
+                img.save(thumb_path, 'WEBP', quality=85, optimize=True)
+                
+            except Exception as e:
+                logger.error(f"Error generating thumbnail: {e}")
+                raise HTTPException(status_code=404, detail="Could not generate thumbnail")
     
     # Check if we're behind Nginx
     if os.environ.get('USE_X_ACCEL_REDIRECT'):