refactor: tidy structure of source files

Fixes #79

src/protocol/search/facet.ts

@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2019 StApps
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+import {SCThingsField} from '../../meta';
+
+/**
+ * A search facet
+ */
+export interface SCFacet {
+  /**
+   * Buckets for the aggregation
+   */
+  buckets: SCFacetBucket[];
+
+  /**
+   * Field of the aggregation
+   */
+  field: SCThingsField;
+}
+
+/**
+ * A bucket of a facet
+ */
+export interface SCFacetBucket {
+  /**
+   * Count of matching search results
+   */
+  count: number;
+
+  /**
+   * Key of a bucket
+   */
+  key: string;
+}