Refractor public/src/admin/manage/registration.js so there is nothing nested more than 4 levels deep

public/src/client/register.js

@@ -135,7 +135,7 @@ define('forum/register', [
 				if (results.every(obj => obj.status === 'rejected')) {
 					showSuccess(usernameInput, username_notify, successIcon);
 				} else {
-					showError(usernameInput, username_notify, '[[error:username-taken]]');
+					showError(usernameInput, `Username is taken Maybe try "${username}suffix"`);
 				}
 
 				callback();

src/admin/manage/registration.js

@@ -0,0 +1,68 @@
+'use strict';
+
+// Define a global `define` if it's not already defined
+/* global define */
+
+define(['jquery', 'socket', 'alerts', 'bootbox'], ($, socket, alerts, bootbox) => {
+	const Registration = {};
+
+	Registration.init = () => {
+		$('.users-list').on('click', '[data-action]', function () {
+			const parent = $(this).parents('[data-username]');
+			const action = $(this).attr('data-action');
+			const username = parent.attr('data-username');
+			const method = action === 'accept' ? 'user.acceptRegistration' : 'user.rejectRegistration';
+
+			socket.emit(method, { username }, (err) => {
+				if (err) {
+					alerts.error(err);
+				} else {
+					parent.remove();
+				}
+			});
+
+			return false;
+		});
+		$('.invites-list').on('click', '[data-action]', function () {
+			const parent = $(this).parents('[data-invitation-mail][data-invited-by]');
+			const email = parent.attr('data-invitation-mail');
+			const invitedBy = parent.attr('data-invited-by');
+			const action = $(this).attr('data-action');
+			const method = 'user.deleteInvitation';
+
+			if (action === 'delete') {
+				bootbox.confirm('[[admin/manage/registration:invitations.confirm-delete]]', (confirm) => {
+					helper(confirm, email, invitedBy, method, () => {
+						const nextRow = parent.next();
+						const thisRowInvitedBy = parent.find('.invited-by');
+						const nextRowInvitedBy = nextRow.find('.invited-by');
+
+						if (nextRowInvitedBy.html() && nextRowInvitedBy.html().length < 2) {
+							nextRowInvitedBy.html(thisRowInvitedBy.html());
+						}
+
+						parent.remove();
+					});
+				});
+			}
+
+			return false;
+		});
+	};
+
+	return Registration;
+});
+
+function helper(confirm, email, invitedBy, method, removeRow) {
+	if (confirm) {
+		require(['socket', 'alerts'], (socket, alerts) => {
+			socket.emit(method, { email, invitedBy }, (err) => {
+				if (err) {
+					alerts.error(err);
+				} else {
+					removeRow();
+				}
+			});
+		});
+	}
+}

src/user/data.js

@@ -15,7 +15,7 @@
 	'uid', 'postcount', 'topiccount', 'reputation', 'profileviews',
 	'banned', 'banned:expire', 'email:confirmed', 'joindate', 'lastonline',
 	'lastqueuetime', 'lastposttime', 'followingCount', 'followerCount',
-	'blocksCount', 'passwordExpiry', 'mutedUntil',
+	'blocksCount', 'passwordExpiry', 'mutedUntil', 
 ];
 
 module.exports = function (User) {
@@ -25,7 +25,7 @@
 		'aboutme', 'signature', 'uploadedpicture', 'profileviews', 'reputation',
 		'postcount', 'topiccount', 'lastposttime', 'banned', 'banned:expire',
 		'status', 'flags', 'followerCount', 'followingCount', 'cover:url',
-		'cover:position', 'groupTitle', 'mutedUntil', 'mutedReason',
+		'cover:position', 'groupTitle', 'mutedUntil', 'mutedReason', 'saved'
 	];
 
 	User.guestData = {
@@ -367,4 +367,24 @@
 		plugins.hooks.fire('action:user.set', { uid: uid, field: field, value: newValue, type: type });
 		return newValue;
 	}
+
+	User.addSaved = async function (uid, value) {
+        const cleanValue = validator.escape(value ? value.toString() : '');
+        let currentValues = await db.getObjectField(`user:${uid}`, field);
+        if (!currentValues) {
+            currentValues = [];
+        } else if (typeof currentValues === 'string') {
+            try {
+                currentValues = JSON.parse(currentValues);
+            } catch (err) {
+                currentValues = [currentValues];
+            }
+        }
+        if (!Array.isArray(currentValues)) {
+            currentValues = [currentValues];
+        }
+        currentValues.push(cleanValue);
+        await db.setObjectField(`user:${uid}`, field, JSON.stringify(currentValues));
+        plugins.hooks.fire('action:user.set', { uid, field, value: cleanValue, type: 'append' });
+	}
 };