persist usernames across sessions via localStorage

www/code/main.js

@@ -168,10 +168,7 @@ define([
                 }
             };
 
-            var createChangeName = function(id, $container) {
-                var buttonElmt = $container.find('#'+id)[0];
-                buttonElmt.addEventListener("click", function() {
-                    Cryptpad.prompt(Messages.changeNamePrompt, '', function (newName) {
+            var setName = module.setName = function (newName) {
                 if (!(typeof(newName) === 'string' && newName.trim())) { return; }
                 var myUserNameTemp = newName.trim();
                 if(newName.trim().length > 32) {
@@ -182,7 +179,21 @@ define([
                    name: myUserName
                 };
                 addToUserList(myData);
+                Cryptpad.setPadAttribute('username', myUserName);
                 onLocal();
+            };
+
+            var getLastName = function () {
+                return Cryptpad.getPadAttribute('username') || '';
+            };
+
+            var createChangeName = function(id, $container) {
+                var buttonElmt = $container.find('#'+id)[0];
+
+                var lastName = getLastName();
+                buttonElmt.addEventListener("click", function() {
+                    Cryptpad.prompt(Messages.changeNamePrompt, lastName, function (newName) {
+                        setName(newName);
                     });
                 });
             };
@@ -427,9 +438,16 @@ define([
                     });
                 }
 
+
                 setEditable(true);
                 initializing = false;
                 //Cryptpad.log("Your document is ready");
+
+                var lastName = getLastName();
+                if (typeof(lastName) === 'string' && lastName.length) {
+                    console.log("Setting previous name to %s", lastName);
+                    setName(lastName);
+                }
             };
 
             var cursorToPos = function(cursor, oldText) {