Notify admins on app update

src/mailer.js

@@ -6,6 +6,7 @@ exports = module.exports = {
     adminChanged: adminChanged,
     passwordReset: passwordReset,
     appUpdateAvailable: appUpdateAvailable,
+    appUpdateDone: appUpdateDone,
     sendDigest: sendDigest,
 
     sendInvite: sendInvite,
@@ -335,6 +336,35 @@ function appUpdateAvailable(mailTo, app, hasSubscription, info, callback) {
     });
 }
 
+function appUpdateDone(mailTo, app, callback) {
+    assert.strictEqual(typeof mailTo, 'string');
+    assert.strictEqual(typeof app, 'object');
+    assert.strictEqual(typeof callback, 'function');
+
+    getMailConfig(function (error, mailConfig) {
+        if (error) return debug('Error getting mail details:', error);
+
+        var templateData = {
+            webadminUrl: config.adminOrigin(),
+            app: app,
+            cloudronName: mailConfig.cloudronName,
+            cloudronAvatarUrl: config.adminOrigin() + '/api/v1/cloudron/avatar'
+        };
+
+        var templateDataText = JSON.parse(JSON.stringify(templateData));
+        templateDataText.format = 'text';
+
+        var mailOptions = {
+            from: mailConfig.notificationFrom,
+            to: mailTo,
+            subject: util.format('App %s was updated', app.fqdn),
+            text: render('app_update_done.ejs', templateDataText)
+        };
+
+        sendMail(mailOptions, callback);
+    });
+}
+
 function sendDigest(mailTo, info, callback) {
     assert.strictEqual(typeof mailTo, 'string');
     assert.strictEqual(typeof info, 'object');