Read config from file

photoalbum/config.py

@@ -1,7 +1,12 @@
+import logging
 from dataclasses import dataclass
 
+import yaml
+
 DEFAULT_CONFIG_PATH = "photoalbum.conf.yml"
 
+logger = logging.getLogger(__name__)
+
 
 @dataclass
 class Config:
@@ -11,4 +16,17 @@ class Config:
     # Size of the image when looking at the standalone image page
     view_size: tuple[int, int] = (1920, 1080)
 
-    # TODO: to/from file classmethods
+    @classmethod
+    def from_yaml(cls, contents: bytes) -> "Config":
+        conf = cls()
+        data = yaml.safe_load(contents)
+        if data is None:
+            return conf
+
+        for key, val in data.items():
+            match key:
+                case "thumnail_size":
+                    conf.thumbnail_size = tuple(val)
+                case "view_size":
+                    conf.view_size = tuple(val)
+        return conf