closes #5677

public/language/en-GB/admin/settings/user.json

@@ -34,6 +34,8 @@
 	"registration.max-invites": "Maximum Invitations per User",
 	"max-invites": "Maximum Invitations per User",
 	"max-invites-help": "0 for no restriction. Admins get infinite invitations<br>Only applicable for \"Invite Only\"",
+	"invite-expiration": "Invite expiration",
+	"invite-expiration-help": "# of days invitations expire in.",
 	"min-username-length": "Minimum Username Length",
 	"max-username-length": "Maximum Username Length",
 	"min-password-length": "Minimum Password Length",

src/user/invite.js

@@ -50,7 +50,7 @@ module.exports = function (User) {
 		var token = utils.generateUUID();
 		var registerLink = nconf.get('url') + '/register?token=' + token + '&email=' + encodeURIComponent(email);
 
-		var oneDay = 86400000;
+		var expireIn = (parseInt(meta.config.inviteExpiration, 10) || 1) * 86400000;
 
 		async.waterfall([
 			function (next) {
@@ -76,7 +76,7 @@ module.exports = function (User) {
 				db.set('invitation:email:' + email, token, next);
 			},
 			function (next) {
-				db.pexpireAt('invitation:email:' + email, Date.now() + oneDay, next);
+				db.pexpireAt('invitation:email:' + email, Date.now() + expireIn, next);
 			},
 			function (next) {
 				User.getUserField(uid, 'username', next);

src/views/admin/settings/user.tpl

@@ -155,6 +155,13 @@
 					[[admin/settings/user:max-invites-help]]
 				</p>
 			</div>
+			<div class="form-group">
+				<label>[[admin/settings/user:invite-expiration]]</label>
+				<input type="number" class="form-control" data-field="inviteExpiration" placeholder="1">
+				<p class="help-block">
+					[[admin/settings/user:invite-expiration-help]]
+				</p>
+			</div>
 			<div class="form-group">
 				<label>[[admin/settings/user:min-username-length]]</label>
 				<input type="text" class="form-control" value="2" data-field="minimumUsernameLength">