[furaffinity] Add 'thumbnail' (mikf#1284) and 'folders' properties

Retrieve 'thumbnail' and 'folders' properties for each post.
Thumbnail (mikf#1284):
 - Preview image used for search results, writing posts, music, etc.
 - Filename format: <post_id>@600-<directory_containing_full_image>.jpg
Folders (related to mikf#1817):
 - A list of all gallery folders containing this post.
 - Folder name format: [<folder_category> - ]<folder_name>
 - Only works on new layout; old layout does not show folders, so list will be empty

A test is included for each property

gallery_dl/extractor/furaffinity.py

@@ -113,6 +113,9 @@ def _parse_post(self, post_id):
  data["gender"] = rh(extr('>Gender</strong>', '</div>'))
  data["width"] = pi(extr("<span>", "x"))
  data["height"] = pi(extr("", "p"))
+ data["folders"] = [rh(folder) for folder in extr(
+ '<h3>Listed in Folders</h3>',
+ '</section>').split('</a>') if rh(folder) != '']
  else:
  # old site layout
  data["title"] = text.unescape(extr("<h2>", "</h2>"))
@@ -132,11 +135,16 @@ def _parse_post(self, post_id):
  data["_description"] = extr(
  '<td valign="top" align="left" width="70%" class="alt1" '
  'style="padding:8px">', ' </td>')
+ data["folders"] = [] # folders not present in old layout
 
  data["artist_url"] = data["artist"].replace("_", "").lower()
  data["user"] = self.user or data["artist_url"]
  data["date"] = text.parse_timestamp(data["filename"].partition(".")[0])
  data["description"] = self._process_description(data["_description"])
+ data["thumbnail"] = (
+ 'https://t.furaffinity.net/' + 
+ str(data['id']) + '@600-' +
+ data['url'].split('/')[-2].split('.')[0] + '.jpg')
 
  return data
 

test/results/furaffinity.py

@@ -115,6 +115,50 @@
  "width" : 1280,
 },
 
+{
+ "#url" : "https://www.furaffinity.net/view/22964019/",
+ "#comment" : "get thumbnails for posts (#1284)",
+ "#category": ("", "furaffinity", "post"),
+ "#class" : furaffinity.FuraffinityPostExtractor,
+
+ "artist" : "Dwale",
+ "artist_url" : "dwale",
+ "date" : "dt:2017-03-21 14:21:29",
+ "fa_category" : "Poetry",
+ "filename" : "1490106089.dwale_poem_for_children",
+ "folders" : [],
+ "height" : 50,
+ "id" : 22964019,
+ "rating" : "General",
+ "title" : "Poem for Children Wishing to Summon Evil Spirits",
+ "thumbnail" : "https://t.furaffinity.net/22964019@600-1490106089.jpg",
+ "width" : 50,
+},
+
+{
+ "#url" : "https://www.furaffinity.net/view/34260156/",
+ "#comment" : "list gallery folders for image",
+ "#category": ("", "furaffinity", "post"),
+ "#class" : furaffinity.FuraffinityPostExtractor,
+
+ "artist" : "dbd",
+ "artist_url" : "dbd",
+ "date" : "dt:2019-12-17 22:52:01",
+ "fa_category" : "All",
+ "filename" : "1576623121.dbd_patreoncustom-wdg13-web",
+ "folders" : ["By Year - 2019",
+ "Custom Character Folder - All Custom Characters",
+ "Custom Character Folder - Other Ungulates",
+ "Custom Character Folder - Female",
+ "Custom Character Folder - Patreon Supported Custom Characters"],
+ "height" : 900,
+ "id" : 34260156,
+ "rating" : "General",
+ "title" : "Patreon Custom Deer",
+ "thumbnail" : "https://t.furaffinity.net/34260156@600-1576623121.jpg",
+ "width" : 488,
+},
+
 {
  "#url" : "https://furaffinity.net/view/21835115/",
  "#category": ("", "furaffinity", "post"),