feat(currentRefinements): implement canRefine (#4690)

Author: Eunjae Lee

src/connectors/current-refinements/__tests__/connectCurrentRefinements-test.ts

@@ -137,6 +137,7 @@ See documentation: https://www.algolia.com/doc/api-reference/widgets/current-ref
 
         expect(renderState.currentRefinements).toEqual({
           items: [],
+          canRefine: false,
           refine: expect.any(Function),
           createURL: expect.any(Function),
           widgetParams: {},
@@ -220,6 +221,7 @@ See documentation: https://www.algolia.com/doc/api-reference/widgets/current-ref
               ],
             },
           ],
+          canRefine: true,
           refine: expect.any(Function),
           createURL: expect.any(Function),
           widgetParams: {},
@@ -242,6 +244,7 @@ See documentation: https://www.algolia.com/doc/api-reference/widgets/current-ref
 
       expect(renderState).toEqual({
         items: [],
+        canRefine: false,
         refine: expect.any(Function),
         createURL: expect.any(Function),
         widgetParams: {},
@@ -324,6 +327,7 @@ See documentation: https://www.algolia.com/doc/api-reference/widgets/current-ref
             ],
           },
         ],
+        canRefine: true,
         refine: expect.any(Function),
         createURL: expect.any(Function),
         widgetParams: {},

src/connectors/current-refinements/connectCurrentRefinements.ts

@@ -112,6 +112,11 @@ export type CurrentRefinementsRendererOptions = {
    */
   items: CurrentRefinementsConnectorParamsItem[];
 
+  /**
+   * Indicates if search state can be refined.
+   */
+  canRefine: boolean;
+
   /**
    * Removes the given refinement and triggers a new search.
    */
@@ -226,8 +231,11 @@ const connectCurrentRefinements: CurrentRefinementsConnector = function connectC
           );
         }
 
+        const items = getItems();
+
         return {
-          items: getItems(),
+          items,
+          canRefine: items.length > 0,
           refine: refinement => clearRefinement(helper, refinement),
           createURL: refinement =>
             createURL(clearRefinementFromState(helper.state, refinement)),