1 files changed, 58 insertions, 0 deletions
diff --git a/resources/src/mediawiki/mediawiki.storage.js b/resources/src/mediawiki/mediawiki.storage.js
new file mode 100644
index 00000000..39583926
--- /dev/null
+++ b/resources/src/mediawiki/mediawiki.storage.js
@@ -0,0 +1,58 @@
+( function ( mw ) {
+	'use strict';
+
+	/**
+	 * Library for storing device specific information. It should be used for storing simple
+	 * strings and is not suitable for storing large chunks of data.
+	 *
+	 * @class mw.storage
+	 * @singleton
+	 */
+	mw.storage = {
+
+		localStorage: window.localStorage,
+
+		/**
+		 * Retrieve value from device storage.
+		 *
+		 * @param {string} key Key of item to retrieve
+		 * @return {string|boolean} False when localStorage not available, otherwise string
+		 */
+		get: function ( key ) {
+			try {
+				return mw.storage.localStorage.getItem( key );
+			} catch ( e ) {}
+			return false;
+		},
+
+		/**
+		  * Set a value in device storage.
+		  *
+		  * @param {string} key Key name to store under
+		  * @param {string} value Value to be stored
+		  * @returns {boolean} Whether the save succeeded or not
+		  */
+		set: function ( key, value ) {
+			try {
+				mw.storage.localStorage.setItem( key, value );
+				return true;
+			} catch ( e ) {}
+			return false;
+		},
+
+		/**
+		  * Remove a value from device storage.
+		  *
+		  * @param {string} key Key of item to remove
+		  * @returns {boolean} Whether the save succeeded or not
+		  */
+		remove: function ( key ) {
+			try {
+				mw.storage.localStorage.removeItem( key );
+				return true;
+			} catch ( e ) {}
+			return false;
+		}
+	};
+
+}( mediaWiki ) );