add "Admin Approval for IPs", which works like Normal for new users and Admin Approval for sockpuppet accounts (#4882)

src/controllers/authentication.js

@@ -63,6 +63,16 @@ authenticationController.register = function(req, res, next) {
 				registerAndLoginUser(req, res, userData, next);
 			} else if (registrationType === 'admin-approval') {
 				addToApprovalQueue(req, userData, next);
+			} else if (registrationType === 'admin-approval-ip') {
+				db.sortedSetCard('ip:' + req.ip + ':uid', function(err, count) {
+					if (err) {
+						next(err);
+					} else if (count) {
+						addToApprovalQueue(req, userData, next);
+					} else {
+						registerAndLoginUser(req, res, userData, next);
+					}
+				});
 			}
 		}
 	], function(err, data) {

src/controllers/index.js

@@ -113,7 +113,7 @@ Controllers.login = function(req, res, next) {
 	data.alternate_logins = loginStrategies.length > 0;
 	data.authentication = loginStrategies;
 	data.allowLocalLogin = parseInt(meta.config.allowLocalLogin, 10) === 1 || parseInt(req.query.local, 10) === 1;
-	data.allowRegistration = registrationType === 'normal' || registrationType === 'admin-approval';
+	data.allowRegistration = registrationType === 'normal' || registrationType === 'admin-approval' || registrationType === 'admin-approval-ip';
 	data.allowLoginWith = '[[login:' + allowLoginWith + ']]';
 	data.breadcrumbs = helpers.buildBreadcrumbs([{text: '[[global:login]]'}]);
 	data.error = req.flash('error')[0] || errorText;

src/middleware/header.js

@@ -57,7 +57,7 @@ module.exports = function(app, middleware) {
 			'brand:logo:url': meta.config['brand:logo:url'] || '',
 			'brand:logo:alt': meta.config['brand:logo:alt'] || '',
 			'brand:logo:display': meta.config['brand:logo']?'':'hide',
-			allowRegistration: registrationType === 'normal' || registrationType === 'admin-approval',
+			allowRegistration: registrationType === 'normal' || registrationType === 'admin-approval' || registrationType === 'admin-approval-ip',
 			searchEnabled: plugins.hasListeners('filter:search.query'),
 			config: res.locals.config,
 			relative_path: nconf.get('relative_path'),

src/views/admin/settings/user.tpl

@@ -124,6 +124,7 @@
 				<select class="form-control" data-field="registrationType">
 					<option value="normal">Normal</option>
 					<option value="admin-approval">Admin Approval</option>
+					<option value="admin-approval-ip">Admin Approval for IPs</option>
 					<option value="invite-only">Invite Only</option>
 					<option value="admin-invite-only">Admin Invite Only</option>
 					<option value="disabled">No registration</option>
@@ -131,6 +132,7 @@
 				<p class="help-block">
 					Normal - Users can register from the /register page.<br/>
 					Admin Approval - User registrations are placed in an <a href="{config.relative_path}/admin/manage/registration">approval queue</a> for administrators.<br/>
+					Admin Approval for IPs - Normal for new users, Admin Approval for IP addresses that already have an account.<br/>
 					Invite Only - Users can invite others from the <a href="{config.relative_path}/users" target="_blank">users</a> page.<br/>
 					Admin Invite Only - Only administrators can invite others from <a href="{config.relative_path}/users" target="_blank">users</a> and <a href="{config.relative_path}/admin/manage/users">admin/manage/users</a> pages.<br/>
 					No registration - No user registration.<br/>