[ADF-983] User Preferences Service (#2044)

* user preferences service

* unit tests and code improvements

* fix tests

* fix tests

* fix tests

* add missing production settings

* readme updates

* integrate with the core module

ng2-components/ng2-alfresco-core/src/services/user-preferences.service.ts

@@ -0,0 +1,71 @@
+/*!
+ * @license
+ * Copyright 2016 Alfresco Software, Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { Injectable } from '@angular/core';
+import { AppConfigService } from './app-config.service';
+import { StorageService } from './storage.service';
+
+@Injectable()
+export class UserPreferencesService {
+
+    private defaults = {
+        paginationSize: 25
+    };
+
+    private _storagePrefix: string = 'GUEST';
+
+    getStoragePrefix(): string {
+        return this._storagePrefix;
+    }
+
+    setStoragePrefix(value: string) {
+        this._storagePrefix = value || 'GUEST';
+    }
+
+    constructor(
+        appConfig: AppConfigService,
+        private storage: StorageService) {
+        this.defaults.paginationSize = appConfig.get('pagination.size', 25);
+    }
+
+    getPropertyKey(property: string): string {
+        return `${this.getStoragePrefix()}__${property}`;
+    }
+
+    set(property: string, value: any) {
+        if (!property) { return; }
+
+        this.storage.setItem(
+            this.getPropertyKey(property),
+            value
+        );
+    }
+
+    get(property: string): string {
+        const key = this.getPropertyKey(property);
+        return this.storage.getItem(key);
+    }
+
+    set paginationSize(value: number) {
+        this.set('PAGINATION_SIZE', value);
+    }
+
+    get paginationSize(): number {
+        return Number(this.get('PAGINATION_SIZE')) || this.defaults.paginationSize;
+    }
+
+}