From 187401a8762371380483db26f4bd65537ae6f66c Mon Sep 17 00:00:00 2001
From: Sheogorath <sheogorath@shivering-isles.com>
Date: Fri, 27 Jul 2018 13:29:08 +0200
Subject: [PATCH] Fix possible weird objects as email

It seems like some providers return strange types for emails which cause
problems. We default to something that is definitely a string.

Signed-off-by: Sheogorath <sheogorath@shivering-isles.com>
---
 lib/letter-avatars.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/letter-avatars.js b/lib/letter-avatars.js
index 53fa011a..55cf9c3a 100644
--- a/lib/letter-avatars.js
+++ b/lib/letter-avatars.js
@@ -27,6 +27,10 @@ exports.generateAvatar = function (name) {
 
 exports.generateAvatarURL = function (name, email = '', big = true) {
   let photo
+  if (typeof email !== 'string') {
+    email = '' + name + '@example.com'
+  }
+
   if (email !== '' && config.allowGravatar) {
     photo = 'https://www.gravatar.com/avatar/' + md5(email.toLowerCase())
     if (big) {