feat(store): allow to set and get all search parameters at once

This allows to save the state for later and make it easy to observe the store.

src/__tests__/store.js

@@ -238,8 +238,34 @@ describe('Store', () => {
       distinct: null,
       attributesToRetrieve: ['objectID'],
     };
+    store.addFacet('price');
 
     // Make sure distinct parameter is gone when overrided with null.
     expect(store.queryParameters).not.toHaveProperty('distinct');
   });
+
+  test('should allow to retrieve all the searchParameters', () => {
+    const client = algoliaClient('app_id', 'api_key');
+    const helper = algoliaHelper(client);
+
+    const store = new Store(helper);
+
+    const searchParameters = helper.getState();
+    expect(store.searchParameters).toEqual(searchParameters);
+  });
+
+  test('should allow to accept new search parameters', () => {
+    const client = algoliaClient('app_id', 'api_key');
+    const helper = algoliaHelper(client);
+
+    const store = new Store(helper);
+
+    const searchParameters = helper.getState();
+    const newSearchParameters = Object.assign({}, searchParameters, {
+      page: 3,
+    });
+
+    store.searchParameters = newSearchParameters;
+    expect(store.searchParameters).toEqual(newSearchParameters);
+  });
 });

src/store.js

@@ -1,5 +1,5 @@
 import algolia from 'algoliasearch';
-import algoliaHelper from 'algoliasearch-helper';
+import algoliaHelper, { SearchParameters } from 'algoliasearch-helper';
 import { version } from '../package.json';
 
 export const FACET_AND = 'and';
@@ -306,6 +306,15 @@ export class Store {
     return parameters;
   }
 
+  get searchParameters() {
+    return Object.assign({}, this._helper.state);
+  }
+
+  set searchParameters(searchParameters) {
+    const newSearchParameters = SearchParameters.make(searchParameters);
+    this._helper.setState(newSearchParameters);
+  }
+
   // Todo: find a better name for this function.
   refresh() {
     this._helper.search();