[tumblr] fix pagination when using 'date-max'

docs/configuration.rst

@@ -5277,7 +5277,8 @@ extractor.tumblr.pagination
 Type
     ``string``
 Default
-    ``"offset"``
+    * ``"before"`` if `date-max <extractor.tumblr.date-min & .date-max_>`__ is set
+    * ``"offset"`` otherwise
 Description
     Controls how to paginate over blog posts.
 

docs/gallery-dl.conf

@@ -779,7 +779,7 @@
             "inline"    : true,
             "offset"    : 0,
             "original"  : true,
-            "pagination": "offset",
+            "pagination": null,
             "posts"     : "all",
             "ratelimit" : "abort",
             "reblogs"   : true,

gallery_dl/extractor/tumblr.py

@@ -550,8 +550,11 @@ class TumblrAPI(oauth.OAuth1API):
             params["api_key"] = self.api_key
 
         strategy = self.extractor.config("pagination")
-        if not strategy and "offset" not in params:
-            strategy = "api"
+        if not strategy:
+            if params.get("before"):
+                strategy = "before"
+            elif "offset" not in params:
+                strategy = "api"
 
         while True:
             data = self._call(endpoint, params)
@@ -573,10 +576,9 @@ class TumblrAPI(oauth.OAuth1API):
                     endpoint = data["_links"]["next"]["href"]
                 except KeyError:
                     return
-
-                params = None
-                if self.api_key:
-                    endpoint += "&api_key=" + self.api_key
+                if params is not None and self.api_key:
+                    endpoint = f"{endpoint}&api_key={self.api_key}"
+                    params = None
 
             elif strategy == "before":
                 if not posts: