From 302f06df9519802d906cf4b553e314585f1bead9 Mon Sep 17 00:00:00 2001
From: Julian Lam <julian@nodebb.org>
Date: Wed, 6 Sep 2017 15:08:51 -0400
Subject: [PATCH] fixes #5914

---
 .../1.6.0/clear-stale-digest-template.js      | 31 +++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 src/upgrades/1.6.0/clear-stale-digest-template.js

diff --git a/src/upgrades/1.6.0/clear-stale-digest-template.js b/src/upgrades/1.6.0/clear-stale-digest-template.js
new file mode 100644
index 0000000000..8b7adeed4b
--- /dev/null
+++ b/src/upgrades/1.6.0/clear-stale-digest-template.js
@@ -0,0 +1,31 @@
+'use strict';
+
+var meta = require('../../meta');
+
+var async = require('async');
+var crypto = require('crypto');
+
+module.exports = {
+	name: 'Clearing stale digest templates that were accidentally saved as custom',
+	timestamp: Date.UTC(2017, 8, 6),
+	method: function (callback) {
+		var matches = [
+			'112e541b40023d6530dd44df4b0d9c5d',		// digest @ 75917e25b3b5ad7bed8ed0c36433fb35c9ab33eb
+			'110b8805f70395b0282fd10555059e9f',		// digest @ 9b02bb8f51f0e47c6e335578f776ffc17bc03537
+			'9538e7249edb369b2a25b03f2bd3282b',		// digest @ 3314ab4b83138c7ae579ac1f1f463098b8c2d414
+		];
+
+		async.waterfall([
+			async.apply(meta.configs.getFields, ['email:custom:digest']),
+			function (fieldset, next) {
+				var hash = fieldset['email:custom:digest'] ? crypto.createHash('md5').update(fieldset['email:custom:digest']).digest('hex') : null;
+
+				if (matches.includes(hash)) {
+					meta.configs.remove('email:custom:digest', next);
+				} else {
+					setImmediate(next);
+				}
+			},
+		], callback);
+	},
+};