Retrieve UI Settings

For fully decoupled solution there is an endpoint to retrieve UI settings: `/api/search/<search_api_endpoint>/ui-settings`. Response is the same as drupalSettings object for the semi-decoupled block solution. For example there is Endpoint with id "default" that uses One column layout and such UI elements: Pager, Search Input, Search Summary, Facet and one of the plugins for search results display.

{
   "id":"default",
   "label":"Default",
   "base_url":"http:\/\/ddd.ddev.site\/api\/search\/default",
   "elements":{
      "006148d3-2eb9-4bde-9175-5f78ca5a720c":{
         "id":"006148d3-2eb9-4bde-9175-5f78ca5a720c",
         "type":"pager",
         "weight":0,
         "widget":"mini"
      },
      "021b5989-314d-45bc-a6bd-bbf28b483d4e":{
         "id":"021b5989-314d-45bc-a6bd-bbf28b483d4e",
         "type":"search_input",
         "weight":0,
         "behaviors":{
            "filter":0,
            "url":0
         },
         "widget":"autocomplete",
         "settings":{
            "placeholder":"Search for contents",
            "filter":{
               "label":"Your search"
            }
         }
      },
      "4e92ce6d-8f5d-4d62-96cc-0b46bd715b62":{
         "id":"4e92ce6d-8f5d-4d62-96cc-0b46bd715b62",
         "type":"summary",
         "weight":0
      },
      "afd64988-bc0d-4811-9a39-1fd575187482":{
         "id":"afd64988-bc0d-4811-9a39-1fd575187482",
         "type":"search_result_local",
         "weight":0,
         "settings":{
            "field_title":"title",
            "field_text":"preview_text",
            "field_category":"category_name",
            "field_image":"preview_image",
            "no_results":"No results found.",
            "loading":"Loading...",
            "columns":"4"
         }
      },
      "0b4f0ca2-3ed5-4ac2-a59f-3d52283cb2ec":{
         "id":"0b4f0ca2-3ed5-4ac2-a59f-3d52283cb2ec",
         "type":"facet",
         "weight":1,
         "behaviors":{
            "collapsible":0,
            "collapsed":0
         },
         "settings":{
            "facet":"content_type",
            "show_numbers":true,
            "soft_limit":0,
            "show_reset_link":true,
            "reset_text":"Show all",
            "hide_reset_when_no_selection":true,
            "soft_limit_settings":{
               "show_less_label":"Show less",
               "show_more_label":"Show more"
            },
            "orientation":"vertical",
            "use_hierarchy":false,
            "expand_hierarchy":false,
            "field_alias":"type",
            "url_alias":"type",
            "show_title":false
         },
         "label":"Content type",
         "widget":"checkbox"
      }
   },
   "layout":{
      "id":"search_twocol",
      "regions":{
         "top":[
            "021b5989-314d-45bc-a6bd-bbf28b483d4e"
         ],
         "first":[
            "4e92ce6d-8f5d-4d62-96cc-0b46bd715b62",
            "0b4f0ca2-3ed5-4ac2-a59f-3d52283cb2ec"
         ],
         "second":[
            "afd64988-bc0d-4811-9a39-1fd575187482"
         ],
         "bottom":[
            "006148d3-2eb9-4bde-9175-5f78ca5a720c"
         ]
      }
   },
   "base_url_autocomplete":"http:\/\/ddd.ddev.site\/search_api_autocomplete\/default"
}