move photo finding to its own function for reuse

.gitignore

@@ -5,3 +5,4 @@ __pycache__
 # Project specific files
 test_album
 DESIGN.md
+TODO.md

photoalbum/generate.py

@@ -13,50 +13,58 @@ def generate(config: Config, album_path: Path) -> None:
     """
     Main generation function
     """
-    generate_thumbnails(config, album_path)
-    # generate_html(config, album_path)
+    photos = find_photos(album_path)
+    generate_thumbnails(config, photos)
+    generate_html(config, album_path)
 
 
-def generate_thumbnails(config: Config, path: Path) -> None:
+def find_photos(path: Path) -> list[Path]:
+    """ """
+    photos = []
+    for parent_path, dirnames, filenames in path.walk():
+        if parent_path.name == "slides":
+            continue
+
+        for filename in filenames:
+            file_path = parent_path / filename
+            if is_photo(file_path):
+                photos.append(file_path)
+
+    return photos
+
+
+def is_photo(photo_path: Path) -> bool:
+    """
+    Returns True if PIL thinks the file is a photo
+    """
+    try:
+        Image.open(photo_path)
+        return True
+    except UnidentifiedImageError:
+        return False
+
+
+def generate_thumbnails(config: Config, photos: list[Path]) -> None:
     """
     Find all of the images and generate thumbnails and on-screen versions
     """
-    images: list[tuple[Path, str]] = []
-    for parent_path, dirnames, filenames in path.walk():
-        for filename in filenames:
-            try:
-                Image.open(parent_path / filename)
-            except UnidentifiedImageError:
-                continue  # Not an image file
+    for photo_path in track(photos, description="Making thumbnails..."):
+        orig_img = Image.open(photo_path)
 
-            # If we modify dirnames in-place, walk() will skip anything we remove
-            if "slides" in dirnames:
-                dirnames.remove("slides")
-
-            images.append((parent_path, filename))
-
-    for parent_path, filename in track(images, description="Making thumbnails..."):
-        file_path = parent_path / filename
-        orig_img = Image.open(parent_path / filename)
-
-        slides_path = parent_path / "slides"
+        slides_path = photo_path.parent / "slides"
         slides_path.mkdir(exist_ok=True)
 
         thumb_img = orig_img.copy()
         thumb_img.thumbnail(config.thumbnail_size)
-        thumb_filename = file_path.stem + ".thumb" + file_path.suffix
+        thumb_filename = photo_path.stem + ".thumb" + photo_path.suffix
         thumb_img.save(slides_path / thumb_filename)
-        logger.info(
-            f"Generated thumbnail size {parent_path / filename} -> {thumb_filename}"
-        )
+        logger.info(f"Generated thumbnail size {photo_path} -> {thumb_filename}")
 
         screen_img = orig_img.copy()
         screen_img.thumbnail(config.view_size)
-        screen_filename = file_path.stem + ".screen" + file_path.suffix
+        screen_filename = photo_path.stem + ".screen" + photo_path.suffix
         screen_img.save(slides_path / screen_filename)
-        logger.info(
-            f"Generated screen size {parent_path / filename} -> {screen_filename}"
-        )
+        logger.info(f"Generated screen size {photo_path} -> {screen_filename}")
 
 
 def generate_html(config: Config, path: Path) -> None: