[deviantart] add 'watch' extractor (#794)

docs/supportedsites.md

@@ -106,7 +106,7 @@ Consider all sites to be NSFW unless otherwise known.
 <tr>
     <td>DeviantArt</td>
     <td>https://www.deviantart.com/</td>
-    <td>Collections, Deviations, Favorites, Folders, Galleries, Journals, Popular Images, Scraps, Sta.sh, User Profiles</td>
+    <td>Collections, Deviations, Favorites, Folders, Galleries, Journals, Popular Images, Scraps, Sta.sh, User Profiles, Watches</td>
     <td><a href="https://github.com/mikf/gallery-dl#oauth">OAuth</a></td>
 </tr>
 <tr>

gallery_dl/extractor/deviantart.py

@@ -889,6 +889,17 @@ class DeviantartFollowingExtractor(DeviantartExtractor):
             yield Message.Queue, url, user
 
 
+class DeviantartWatchExtractor(DeviantartExtractor):
+    """Extractor for Deviations from watched users"""
+    subcategory = "watch"
+    directory_fmt = ("{category}", "{author[username]}")
+    pattern = r"(?:https?://)?(?:www\.)?deviantart\.com/notifications(/)watch/"
+    test = ("https://www.deviantart.com/notifications/watch/",)
+
+    def deviations(self):
+        return self.api.browse_deviantsyouwatch()
+
+
 ###############################################################################
 # API Interfaces ##############################################################
 
@@ -933,6 +944,12 @@ class DeviantartOAuthAPI():
             self.client_id,
         )
 
+    def browse_deviantsyouwatch(self, offset=0):
+        """Yield deviations from users you watch"""
+        endpoint = "browse/deviantsyouwatch"
+        params = {"limit": "50", "offset": offset}
+        return self._pagination(endpoint, params, public=False)
+
     def browse_popular(self, query=None, timerange=None, offset=0):
         """Yield popular deviations"""
         endpoint = "browse/popular"

scripts/supportedsites.py

@@ -123,6 +123,7 @@ SUBCATEGORY_MAP = {
     "status" : "Images from Statuses",
     "tag"    : "Tag Searches",
     "user"   : "User Profiles",
+    "watch"  : "Watches",
     "following"    : "",
     "related-pin"  : "related Pins",
     "related-board": "",