[kemonoparty] initial support for post revisions (#4498, #4597)

- single revision
https://kemono.party/SERVICE/user/12345/post/12345/revision/12345

- all revisions
https://kemono.party/SERVICE/user/12345/post/12345/revisions

gallery_dl/extractor/kemonoparty.py

@@ -211,6 +211,10 @@ class KemonopartyExtractor(Extractor):
             self.root, server)
         return self.request(url).json()
 
+    @memcache(keyarg=1)
+    def _post_revisions(self, url):
+        return self.request(url + "/revisions").json()
+
 
 def _validate(response):
     return (response.headers["content-length"] != "9" or
@@ -248,11 +252,12 @@ class KemonopartyUserExtractor(KemonopartyExtractor):
 class KemonopartyPostExtractor(KemonopartyExtractor):
     """Extractor for a single kemono.party post"""
     subcategory = "post"
-    pattern = USER_PATTERN + r"/post/([^/?#]+)"
+    pattern = USER_PATTERN + r"/post/([^/?#]+)(/revisions?(?:/(\d*))?)?"
     example = "https://kemono.party/SERVICE/user/12345/post/12345"
 
     def __init__(self, match):
-        _, _, service, user_id, post_id = match.groups()
+        _, _, service, user_id, post_id, self.revision, self.revision_id = \
+            match.groups()
         self.subcategory = service
         KemonopartyExtractor.__init__(self, match)
         self.api_url = "{}/api/v1/{}/user/{}/post/{}".format(
@@ -260,7 +265,18 @@ class KemonopartyPostExtractor(KemonopartyExtractor):
         self.user_url = "{}/{}/user/{}".format(self.root, service, user_id)
 
     def posts(self):
-        return (self.request(self.api_url).json(),)
+        if not self.revision:
+            return (self.request(self.api_url).json(),)
+
+        revs = self._post_revisions(self.api_url)
+        if not self.revision_id:
+            return revs
+
+        for rev in revs:
+            if str(rev["revision_id"]) == self.revision_id:
+                return (rev,)
+
+        raise exception.NotFoundError("revision")
 
 
 class KemonopartyDiscordExtractor(KemonopartyExtractor):

test/results/kemonoparty.py

@@ -5,6 +5,7 @@
 # published by the Free Software Foundation.
 
 from gallery_dl.extractor import kemonoparty
+from gallery_dl import exception
 
 
 __tests__ = (
@@ -154,6 +155,37 @@ __tests__ = (
     "#class"   : kemonoparty.KemonopartyPostExtractor,
 },
 
+{
+    "#url"     : "https://kemono.party/patreon/user/3161935/post/68231671/revision/134996",
+    "#comment" : "revisions (#4498)",
+    "#category": ("", "kemonoparty", "patreon"),
+    "#class"   : kemonoparty.KemonopartyPostExtractor,
+    "#urls"    : "https://kemono.party/data/88/52/88521f71822dfa2f42df3beba319ea4fceda2a2d6dc59da0276a75238f743f86.jpg",
+
+    "revision_id": 134996,
+},
+
+{
+    "#url"     : "https://kemono.party/patreon/user/3161935/post/68231671/revisions",
+    "#comment" : "revisions (#4498)",
+    "#category": ("", "kemonoparty", "patreon"),
+    "#class"   : kemonoparty.KemonopartyPostExtractor,
+    "#pattern" : r"https://kemono\.party/data/88/52/88521f71822dfa2f42df3beba319ea4fceda2a2d6dc59da0276a75238f743f86\.jpg",
+    "#count"   : 9,
+    "#archive" : False,
+
+    "revision_id": range(134996, 3052965),
+},
+
+
+{
+    "#url"     : "https://kemono.party/patreon/user/3161935/post/68231671/revision/12345",
+    "#comment" : "revisions (#4498)",
+    "#category": ("", "kemonoparty", "patreon"),
+    "#class"   : kemonoparty.KemonopartyPostExtractor,
+    "#exception": exception.NotFoundError,
+},
+
 {
     "#url"     : "https://kemono.party/discord/server/488668827274444803#608504710906904576",
     "#category": ("", "kemonoparty", "discord"),