Add support for bookmark thumbnails (#721)

* Preview Image

* fix tests

* add test

* download preview image

* relative path

* gst

* details view

* fix tests

* Improve preview image styles

* Remove preview image URL from model

* Revert form changes

* update tests

* make it work in uwsgi

---------

Co-authored-by: Sascha Ißbrücker <sascha.issbruecker@gmail.com>

bookmarks/services/website_loader.py

@@ -1,6 +1,7 @@
 import logging
 from dataclasses import dataclass
 from functools import lru_cache
+from urllib.parse import urljoin
 
 import requests
 from bs4 import BeautifulSoup
@@ -15,12 +16,14 @@ class WebsiteMetadata:
     url: str
     title: str
     description: str
+    preview_image: str | None
 
     def to_dict(self):
         return {
             "url": self.url,
             "title": self.title,
             "description": self.description,
+            "preview_image": self.preview_image,
         }
 
 
@@ -30,6 +33,7 @@ class WebsiteMetadata:
 def load_website_metadata(url: str):
     title = None
     description = None
+    preview_image = None
     try:
         start = timezone.now()
         page_text = load_page(url)
@@ -55,10 +59,21 @@ def load_website_metadata(url: str):
                 else None
             )
 
+        image_tag = soup.find("meta", attrs={"property": "og:image"})
+        preview_image = image_tag["content"].strip() if image_tag else None
+        if (
+            preview_image
+            and not preview_image.startswith("http://")
+            and not preview_image.startswith("https://")
+        ):
+            preview_image = urljoin(url, preview_image)
+
         end = timezone.now()
         logger.debug(f"Parsing duration: {end - start}")
     finally:
-        return WebsiteMetadata(url=url, title=title, description=description)
+        return WebsiteMetadata(
+            url=url, title=title, description=description, preview_image=preview_image
+        )
 
 
 CHUNK_SIZE = 50 * 1024