[inkbunny] add 'metadata' option (#283)

docs/configuration.rst

@@ -873,6 +873,15 @@ Description Controls whether to choose the GIF or MP4 version of an animation.
 =========== =====
 
 
+extractor.inkbunny.metadata
+---------------------------
+=========== =====
+Type        ``bool``
+Default     ``false``
+Description Fetch ``description``, ``writing``, and ``pools`` metadata fields.
+=========== =====
+
+
 extractor.inkbunny.orderby
 --------------------------
 =========== =====

gallery_dl/extractor/inkbunny.py

@@ -171,10 +171,15 @@ class InkbunnyAPI():
     def __init__(self, extractor):
         self.extractor = extractor
         self.session_id = None
+        self.metadata = extractor.config("metadata")
 
     def detail(self, submission_ids):
         """Get full details about submissions with the given IDs"""
         params = {"submission_ids": submission_ids}
+        if self.metadata:
+            params["show_description"] = "yes"
+            params["show_writing"] = "yes"
+            params["show_pools"] = "yes"
         return self._call("submissions", params)["submissions"]
 
     def search(self, params):