[catbox] add 'album' extractor (#2410)

adapted from #2805

- rewrite using GalleryExtractor
- extract more metadata
- match lolisafe names
- add test

docs/supportedsites.md

@@ -109,6 +109,12 @@ Consider all sites to be NSFW unless otherwise known.
     <td>Albums</td>
     <td></td>
 </tr>
+<tr>
+    <td>Catbox</td>
+    <td>https://catbox.moe/</td>
+    <td>Albums</td>
+    <td></td>
+</tr>
 <tr>
     <td>Comic Vine</td>
     <td>https://comicvine.gamespot.com/</td>

gallery_dl/extractor/__init__.py

@@ -26,6 +26,7 @@
     "behance",
     "blogger",
     "bunkr",
+    "catbox",
     "comicvine",
     "cyberdrop",
     "danbooru",

gallery_dl/extractor/catbox.py

@@ -0,0 +1,56 @@
+# -*- coding: utf-8 -*-
+
+# Copyright 2022 Mike Fährmann
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+
+"""Extractors for https://catbox.moe/"""
+
+from .common import GalleryExtractor
+from .. import text
+
+
+class CatboxAlbumExtractor(GalleryExtractor):
+    """Extractor for catbox albums"""
+    category = "catbox"
+    subcategory = "album"
+    root = "https://catbox.moe"
+    filename_fmt = "{filename}.{extension}"
+    directory_fmt = ("{category}", "{album_name} ({album_id})")
+    archive_fmt = "{album_id}_{filename}"
+    pattern = r"(?:https?://)?(?:www\.)?catbox\.moe(/c/[^/?#]+)"
+    test = (
+        ("https://catbox.moe/c/1igcbe", {
+            "url": "35866a88c29462814f103bc22ec031eaeb380f8a",
+            "content": "70ddb9de3872e2d17cc27e48e6bf395e5c8c0b32",
+            "pattern": r"https://files\.catbox\.moe/\w+\.\w{3}$",
+            "count": 3,
+            "keyword": {
+                "album_id": "1igcbe",
+                "album_name": "test",
+                "date": "dt:2022-08-18 00:00:00",
+                "description": "album test &>",
+            },
+        }),
+        ("https://www.catbox.moe/c/cd90s1"),
+        ("https://catbox.moe/c/w7tm47#"),
+    )
+
+    def metadata(self, page):
+        extr = text.extract_from(page)
+        return {
+            "album_id"   : self.gallery_url.rpartition("/")[2],
+            "album_name" : text.unescape(extr("<h1>", "<")),
+            "date"       : text.parse_datetime(extr(
+                "<p>Created ", "<"), "%B %d %Y"),
+            "description": text.unescape(extr("<p>", "<")),
+        }
+
+    def images(self, page):
+        return [
+            ("https://files.catbox.moe/" + path, None)
+            for path in text.extract_iter(
+                page, ">https://files.catbox.moe/", "<")
+        ]