[moebooru] add 'metadata' option (#4646)

for extended 'pool' metadata

docs/configuration.rst

@@ -2247,6 +2247,18 @@ Description
     Fetch media from replies to other notes.
 
 
+extractor.[moebooru].pool.metadata
+----------------------------------
+Type
+    ``bool``
+Default
+    ``false``
+Description
+    Extract extended ``pool`` metadata.
+
+    Note: Not supported by all ``moebooru`` instances.
+
+
 extractor.newgrounds.flash
 --------------------------
 Type

gallery_dl/extractor/moebooru.py

@@ -124,6 +124,11 @@ class MoebooruPoolExtractor(MoebooruExtractor):
         self.pool_id = match.group(match.lastindex)
 
     def metadata(self):
+        if self.config("metadata"):
+            url = "{}/pool/show/{}.json".format(self.root, self.pool_id)
+            pool = self.request(url).json()
+            pool.pop("posts", None)
+            return {"pool": pool}
         return {"pool": text.parse_int(self.pool_id)}
 
     def posts(self):

test/results/konachan.py

@@ -5,6 +5,7 @@
 # published by the Free Software Foundation.
 
 from gallery_dl.extractor import moebooru
+from gallery_dl import exception
 
 
 __tests__ = (
@@ -54,6 +55,15 @@ __tests__ = (
     "#sha1_content": "cf0546e38a93c2c510a478f8744e60687b7a8426",
 },
 
+{
+    "#url"     : "https://konachan.com/pool/show/95",
+    "#comment" : "'metadata' option (#4646)",
+    "#category": ("moebooru", "konachan", "pool"),
+    "#class"   : moebooru.MoebooruPoolExtractor,
+    "#options"  : {"metadata": True},
+    "#exception": exception.HttpError,
+},
+
 {
     "#url"     : "https://konachan.net/pool/show/95",
     "#category": ("moebooru", "konachan", "pool"),

test/results/yandere.py

@@ -62,6 +62,27 @@ __tests__ = (
     "#sha1_content": "2a35b9d6edecce11cc2918c6dce4de2198342b68",
 },
 
+{
+    "#url"     : "https://yande.re/pool/show/318",
+    "#comment" : "'metadata' option (#4646)",
+    "#category": ("moebooru", "yandere", "pool"),
+    "#class"   : moebooru.MoebooruPoolExtractor,
+    "#options" : {"metadata": True},
+    "#count"   : 3,
+
+    "pool": {
+        "created_at" : "2008-12-13T15:56:10.728Z",
+        "description": "Dengeki Hime's posts are in pool #97.",
+        "id"         : 318,
+        "is_public"  : True,
+        "name"       : "Galgame_Mag_08",
+        "post_count" : 3,
+        "updated_at" : "2012-03-11T14:31:00.935Z",
+        "user_id"    : 1305,
+    },
+
+},
+
 {
     "#url"     : "https://yande.re/post/popular_by_month?month=6&year=2014",
     "#category": ("moebooru", "yandere", "popular"),