feat(calendar): validate org defaults in calendar.settings

Documented keys default_location, default_duration_minutes,
default_recurrence; unknown keys (week_patterns) passthrough;
invalid known shape returns 400.

Refs EventHub/EventHubBack#63

test/api/users/user_calendar_by_id_tests.erl

@@ -62,7 +62,7 @@ test_update_calendar(Token, CalId) ->
   ct:pal("    OK").
 
 test_update_calendar_settings(Token, CalId) ->
-  ct:pal("  TEST: Persist calendar.settings.week_patterns"),
+  ct:pal("  TEST: Persist calendar.settings week_patterns + org defaults"),
   Path = <<"/v1/calendars/", CalId/binary>>,
   Settings = #{
     <<"week_patterns">> => [
@@ -73,12 +73,26 @@ test_update_calendar_settings(Token, CalId) ->
           #{<<"weekday">> => 1, <<"time">> => <<"10:00">>, <<"duration">> => 60, <<"title">> => <<"Open">>}
         ]
       }
-    ]
+    ],
+    <<"default_location">> => #{
+      <<"address">> => <<"ул. Пример, 1">>,
+      <<"lat">> => 55.75,
+      <<"lon">> => 37.61
+    },
+    <<"default_duration_minutes">> => 60,
+    <<"default_recurrence">> => #{
+      <<"enabled">> => true,
+      <<"freq">> => <<"WEEKLY">>,
+      <<"interval">> => 1
+    }
   },
   Updated = api_test_runner:client_put(Path, Token, #{settings => Settings}),
   ?assertEqual(Settings, maps:get(<<"settings">>, Updated)),
   Got = api_test_runner:client_get(Path, Token),
   ?assertEqual(Settings, maps:get(<<"settings">>, Got)),
+  Bad = api_test_runner:client_request(put, Path, Token,
+    jsx:encode(#{settings => #{default_location => #{address => <<"">>}}})),
+  ?assertMatch({ok, 400, _, _}, Bad),
   ct:pal("    OK").
 
 test_update_calendar_forbidden(OtherToken, CalId) ->