Enable/disable snippets store

Allows temporary disable store so every `get()` method call will return `undefined`.

Author: sergeche

lib/storage.js

@@ -6,10 +6,30 @@ export default class SnippetsStorage {
     constructor(data) {
         this._string = new Map();
         this._regexp = new Map();
+        this._disabled = false;
 
         this.load(data);
     }
 
+    get disabled() {
+        return this._disabled;
+    }
+
+    /**
+     * Disables current store. A disabled store always returns `undefined`
+     * on `get()` method
+     */
+    disable() {
+        this._disabled = true;
+    }
+
+    /**
+     * Enables current store.
+     */
+    enable() {
+        this._disabled = false;
+    }
+
     /**
      * Registers a new snippet item
      * @param {String|Regexp} key
@@ -34,6 +54,10 @@ export default class SnippetsStorage {
      * @return {Snippet}
      */
     get(key) {
+        if (this.disabled) {
+            return undefined;
+        }
+
         if (this._string.has(key)) {
             return this._string.get(key);
         }
@@ -71,6 +95,10 @@ export default class SnippetsStorage {
      * Returns all available snippets from given store
      */
     values() {
+        if (this.disabled) {
+            return [];
+        }
+        
         const string = Array.from(this._string.values());
         const regexp = Array.from(this._regexp.values());
         return string.concat(regexp);

test/storage.js

@@ -61,4 +61,19 @@ describe('Storage', () => {
         assert.equal(storage.get('a2').key, 'a2');
         assert.equal(storage.get('a2').value, 'baz');
     });
+
+    it('enable/disable', () => {
+        const storage = new SnippetsStorage({'foo': 'bar'});
+
+        assert.equal(storage.disabled, false);
+        assert(storage.get('foo'));
+
+        storage.disable();
+        assert.equal(storage.disabled, true);
+        assert.equal(storage.get('foo'), undefined);
+
+        storage.enable();
+        assert.equal(storage.disabled, false);
+        assert(storage.get('foo'));
+    });
 });