filterstorage: Add Filter Storage

Filter Storage allows to add filters on top of a query

Gruntfile.js

@@ -174,6 +174,7 @@ module.exports = function (grunt) {
           'src/jio.storage/gdrivestorage.js',
           'src/jio.storage/unionstorage.js',
           'src/jio.storage/erp5storage.js',
+          'src/jio.storage/filterstorage.js',
           'src/jio.storage/querystorage.js',
           'src/jio.storage/drivetojiomapping.js',
           'src/jio.storage/documentstorage.js',

src/jio.storage/filterstorage.js

+/*
+ * JIO extension for resource replication.
+ * Copyright (C) 2013, 2016  Nexedi SA
+ *
+ *   This library is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU Lesser General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This library 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 Lesser General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Lesser General Public License
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/*jslint nomen: true*/
+/*global jIO, ComplexQuery*/
+
+(function (jIO, ComplexQuery) {
+  "use strict";
+
+  /****************************************************
+
+  ****************************************************/
+  function FilterStorage(spec) {
+    this._sub_storage = jIO.createJIO(spec.sub_storage);
+    this._query = spec.query;
+  }
+
+  FilterStorage.prototype.get = function () {
+    return this._sub_storage.get.apply(this._sub_storage, arguments);
+  };
+  FilterStorage.prototype.allAttachments = function () {
+    return this._sub_storage.allAttachments.apply(this._sub_storage, arguments);
+  };
+  FilterStorage.prototype.post = function () {
+    return this._sub_storage.post.apply(this._sub_storage, arguments);
+  };
+  FilterStorage.prototype.put = function () {
+    return this._sub_storage.put.apply(this._sub_storage, arguments);
+  };
+  FilterStorage.prototype.remove = function () {
+    return this._sub_storage.remove.apply(this._sub_storage, arguments);
+  };
+  FilterStorage.prototype.getAttachment = function () {
+    return this._sub_storage.getAttachment.apply(this._sub_storage, arguments);
+  };
+  FilterStorage.prototype.putAttachment = function () {
+    return this._sub_storage.putAttachment.apply(this._sub_storage, arguments);
+  };
+  FilterStorage.prototype.removeAttachment = function () {
+    return this._sub_storage.removeAttachment.apply(this._sub_storage,
+                                                    arguments);
+  };
+  FilterStorage.prototype.repair = function () {
+    return this._sub_storage.repair.apply(this._sub_storage, arguments);
+  };
+  FilterStorage.prototype.buildQuery = function (options) {
+    var sub_storage = this._sub_storage;
+    if (sub_storage.hasCapacity("query")) {
+      if (options.query !== undefined) {
+        options.query = new ComplexQuery({
+          operator: "AND",
+          query_list: [
+            options.query,
+            this._query
+          ]
+        }).toString();
+      } else {
+        options.query = this._query;
+      }
+    }
+    return sub_storage.buildQuery(options);
+  };
+  FilterStorage.prototype.hasCapacity = function (name) {
+    return this._sub_storage.hasCapacity(name);
+  };
+
+  jIO.addStorage('filter', FilterStorage);
+
+}(jIO, ComplexQuery));

test/tests.html

@@ -36,6 +36,7 @@
   <script src="jio.storage/drivetojiomapping.tests.js"></script>
   <script src="jio.storage/unionstorage.tests.js"></script>
   <script src="jio.storage/erp5storage.tests.js"></script>
+  <script src="jio.storage/filterstorage.tests.js"></script>
   <script src="jio.storage/indexeddbstorage.tests.js"></script>
   <script src="jio.storage/uuidstorage.tests.js"></script>
   <script src="jio.storage/replicatestorage.tests.js"></script>