Method to get a site-key for config

Means that things like XenForoIndex and AO3Series don't require separate
config entries.

leech.py

@@ -54,8 +54,8 @@ def load_on_disk_options(site):
     try:
         with open('leech.json') as store_file:
             store = json.load(store_file)
-            login = store.get('logins', {}).get(site.__name__, False)
-            configured_site_options = store.get('site_options', {}).get(site.__name__, {})
+            login = store.get('logins', {}).get(site.site_key(), False)
+            configured_site_options = store.get('site_options', {}).get(site.site_key(), {})
             cover_options = store.get('cover', {})
     except FileNotFoundError:
         logger.info("Unable to locate leech.json. Continuing assuming it does not exist.")

sites/__init__.py

@@ -67,12 +67,18 @@ class Site:
     extracting the content of a story from said site.
     """
     session = attr.ib()
-    footnotes = attr.ib(default=attr.Factory(list), init=False)
+    footnotes = attr.ib(factory=list, init=False)
     options = attr.ib(default=attr.Factory(
         lambda site: site.get_default_options(),
         True
     ))
 
+    @classmethod
+    def site_key(cls):
+        if hasattr(cls, '_key'):
+            return cls._key
+        return cls.__name__
+
     @staticmethod
     def get_site_specific_option_defs():
         """Returns a list of click.option objects to add to CLI commands.

sites/ao3.py

@@ -89,6 +89,8 @@ class ArchiveOfOurOwn(Site):
 
 @register
 class ArchiveOfOurOwnSeries(ArchiveOfOurOwn):
+    _key = "ArchiveOfOurOwn"
+
     @staticmethod
     def matches(url):
         # e.g. http://archiveofourown.org/series/5683105/

sites/xenforo.py

@@ -249,7 +249,7 @@ class SpaceBattles(XenForo):
 
 @register
 class SpaceBattlesIndex(SpaceBattles, XenForoIndex):
-    pass
+    _key = "SpaceBattles"
 
 
 @register
@@ -264,7 +264,7 @@ class QuestionableQuesting(XenForo):
 
 @register
 class QuestionableQuestingIndex(QuestionableQuesting, XenForoIndex):
-    pass
+    _key = "QuestionableQuesting"
 
 
 @register
@@ -274,4 +274,4 @@ class AlternateHistory(XenForo):
 
 @register
 class AlternateHistoryIndex(AlternateHistory, XenForoIndex):
-    pass
+    _key = "AlternateHistory"