Fix Library.add() method to properly apply advanced settings (#1384)

* Fixing how advanced settings params are set and adding a prefix & when appending advanced settings. Update parts append to use f-string

* Adding basic test to include Advanced settings.

* lint fix

* fix failing test

* lint fix in test

* Update test_library.py

Add section deletion after testing

plexapi/library.py

@@ -383,7 +383,8 @@ class Library(PlexObject):
         part = (f'/library/sections?name={quote_plus(name)}&type={type}&agent={agent}'
                 f'&scanner={quote_plus(scanner)}&language={language}&{urlencode(locations, doseq=True)}')
         if kwargs:
-            part += urlencode(kwargs)
+            prefs_params = {f'prefs[{k}]': v for k, v in kwargs.items()}
+            part += f'&{urlencode(prefs_params)}'
         return self._server.query(part, method=self._server._session.post)
 
     def history(self, maxresults=None, mindate=None):

tests/test_library.py

@@ -193,6 +193,32 @@ def test_library_add_edit_delete(plex, movies, photos):
     assert section not in plex.library.sections()
 
 
+def test_library_add_advanced_settings(plex, movies):
+    # Create Other Videos library = No external metadata scanning
+    section_name = "plexapi_test_advanced_section"
+    movie_location = movies.locations[0]
+    advanced_settings = {"enableCinemaTrailers": 0,
+                         "enableBIFGeneration": 0,
+                         "augmentWithProviderContent": 0,
+                         "enableCreditsMarkerGeneration": 0}
+    plex.library.add(
+        name=section_name,
+        type="movie",
+        agent="com.plexapp.agents.none",
+        scanner="Plex Video Files Scanner",
+        language="xn",
+        location=[movie_location],
+        **advanced_settings
+    )
+    section = plex.library.section(section_name)
+    assert section.title == section_name
+    for setting in section.settings():
+        if setting.value != setting.default:
+            assert advanced_settings.get(setting.id) == setting.value
+    section.delete()
+    assert section not in plex.library.sections()
+
+
 def test_library_Library_cleanBundle(plex):
     plex.library.cleanBundles()