[facebook] ensure numeric 'user_id' values (#7953)

handle 'pfbid…' IDs

gallery_dl/extractor/facebook.py

@@ -61,6 +61,7 @@ class FacebookExtractor(Extractor):
             "user_id": text.extr(
                 set_page, '"owner":{"__typename":"User","id":"', '"'
             ),
+            "user_pfbid": "",
             "title": self.decode_all(text.extr(
                 set_page, '"title":{"text":"', '"'
             )),
@@ -74,6 +75,13 @@ class FacebookExtractor(Extractor):
             )
         }
 
+        if directory["user_id"].startswith("pfbid"):
+            directory["user_pfbid"] = directory["user_id"]
+            directory["user_id"] = (
+                text.extr(
+                    set_page, '"actors":[{"__typename":"User","id":"', '"') or
+                directory["set_id"].split(".")[1])
+
         return directory
 
     def parse_photo_page(self, photo_page):
@@ -92,6 +100,7 @@ class FacebookExtractor(Extractor):
             "user_id": text.extr(
                 photo_page, '"owner":{"__typename":"User","id":"', '"'
             ),
+            "user_pfbid": "",
             "caption": self.decode_all(text.extr(
                 photo_page,
                 '"message":{"delight_ranges"',
@@ -115,6 +124,11 @@ class FacebookExtractor(Extractor):
             )
         }
 
+        if photo["user_id"].startswith("pfbid"):
+            photo["user_pfbid"] = photo["user_id"]
+            photo["user_id"] = text.extr(
+                photo_page, r'\"content_owner_id_new\":\"', r'\"')
+
         text.nameext_from_url(photo["url"], photo)
 
         photo["followups_ids"] = []