[vipergirls] implement 'order-posts' option (#8248)

docs/configuration.rst

@@ -6053,6 +6053,22 @@ Description
     or `cookies <extractor.*.cookies_>`__
 
 
+extractor.vipergirls.order-posts
+--------------------------------
+Type
+    ``string``
+Default
+    ``"desc"``
+Description
+    Controls the order in which
+    posts of a ``thread`` are processed.
+
+    ``"asc"``
+        Ascending order (oldest first)
+    ``"desc"`` | ``"reverse"``
+        Descending order (newest first)
+
+
 extractor.vk.offset
 -------------------
 Type

docs/gallery-dl.conf

@@ -877,8 +877,9 @@
             "password": "",
             "sleep-request": "0.5",
 
-            "domain" : "viper.click",
-            "like"   : false
+            "domain"     : "viper.click",
+            "like"       : false,
+            "order-posts": "desc"
         },
         "vk":
         {

gallery_dl/extractor/vipergirls.py

@@ -51,8 +51,16 @@ class VipergirlsExtractor(Extractor):
                 like = False
 
         posts = root.iter("post")
-        if self.page:
-            util.advance(posts, (text.parse_int(self.page[5:]) - 1) * 15)
+        if (order := self.config("order-posts")) and \
+                order[0] not in ("d", "r"):
+            if self.page:
+                util.advance(posts, (text.parse_int(self.page[5:]) - 1) * 15)
+        else:
+            posts = list(posts)
+            if self.page:
+                offset = text.parse_int(self.page[5:]) * 15
+                posts = posts[:offset]
+            posts.reverse()
 
         for post in posts:
             images = list(post)

test/results/vipergirls.py

@@ -13,7 +13,7 @@ __tests__ = (
     "#category": ("", "vipergirls", "thread"),
     "#class"   : vipergirls.VipergirlsThreadExtractor,
     "#count"   : 225,
-    "#sha1_url": "0d75cb42777f5bebc0d284d1d38cb90c750c61d9",
+    "#sha1_url": "3a127b2d4f61d538ac4ad5340a787ef9f0b05b1f",
 
     "count"       : {112, 113},
     "num"         : range(1, 113),
@@ -29,6 +29,7 @@ __tests__ = (
     "#url"     : "https://vipergirls.to/threads/6858916-Karina/page4",
     "#category": ("", "vipergirls", "thread"),
     "#class"   : vipergirls.VipergirlsThreadExtractor,
+    "#options" : {"order-posts": "asc"},
     "#count"   : 1279,
 },