[ADF-3497] Facet intervals on search filter (#4255)

* [ADF-3497] allow facetIntervals on search

* [ADF-3497] update schema json

* [ADF-3497] update json

* [ADF-3497] documentation update

* [ADF-3497] specify that sets are not supported

* [ADF-3497] no spaces on labels - mention

* [ADF-3497] documentation update

* [ADF-3497] update examples & document label key

* [ADF-3497] tests added

* [ADF-3497] testRail id

* [ADF-3497] allow config of custom pageSize values

* [ADF-3497] support mincount filtering also for intervals

* [ADF-3497] support expanded property also for facetIntervals

* remove no longer needed info

- bcs. of PR #4322 fix

lib/content-services/search/search-query-builder.service.ts

@@ -224,6 +224,7 @@ export class SearchQueryBuilderService {
                 fields: this.config.fields,
                 filterQueries: this.filterQueries,
                 facetQueries: this.facetQueries,
+                facetIntervals: this.facetIntervals,
                 facetFields: this.facetFields,
                 sort: this.sort
             };
@@ -280,6 +281,20 @@ export class SearchQueryBuilderService {
         return false;
     }
 
+    /**
+     * Checks if FacetIntervals has been defined
+     * @returns True if defined, false otherwise
+     */
+    get hasFacetIntervals(): boolean {
+        if (this.config
+            && this.config.facetIntervals
+            && this.config.facetIntervals.intervals
+            && this.config.facetIntervals.intervals.length > 0) {
+            return true;
+        }
+        return false;
+    }
+
     protected get sort(): RequestSortDefinitionInner[] {
         return this.sorting.map((def) => {
             return new RequestSortDefinitionInner({
@@ -301,6 +316,22 @@ export class SearchQueryBuilderService {
         return null;
     }
 
+    protected get facetIntervals(): any {
+        if (this.hasFacetIntervals) {
+            const configIntervals = this.config.facetIntervals;
+
+            return {
+                intervals: configIntervals.intervals.map((interval) => <any> {
+                    label: interval.label,
+                    field: interval.field,
+                    sets: interval.sets
+                })
+            };
+        }
+
+        return null;
+    }
+
     protected getFinalQuery(): string {
         let query = '';