upgrade script to generate and set email logo+sizes in config

src/upgrades/1.5.3/generate-email-logo.js

@@ -0,0 +1,48 @@
+'use strict';
+
+var db = require('../../database');
+var image = require('../../image');
+var meta = require('../../meta');
+
+var async = require('async');
+var winston = require('winston');
+var path = require('path');
+var nconf = require('nconf');
+var url = require('url');
+
+module.exports = {
+	name: 'Generate email logo for use in email header',
+	timestamp: Date.UTC(2017, 6, 17),
+	method: function (callback) {
+		var skip = false;
+
+		async.series([
+			function (next) {
+				// Resize existing logo (if present) to email header size
+				var uploadPath = path.join(nconf.get('upload_path'), 'system', 'site-logo-x50.png');
+				var sourcePath = meta.config['brand:logo'] ? path.join(nconf.get('upload_path'), 'system', path.basename(meta.config['brand:logo'])) : null;
+
+				if (!sourcePath) {
+					skip = true;
+					return setImmediate(next);
+				}
+
+				image.resizeImage({
+					path: sourcePath,
+					target: uploadPath,
+					extension: 'png',
+					height: 50,
+				}, next);
+			},
+			function (next) {
+				if (skip) {
+					return setImmediate(next);
+				}
+
+				meta.configs.setMultiple({
+					'brand:logo': path.join(nconf.get('upload_path'), 'system', path.basename(meta.config['brand:logo'])),
+				}, next);
+			},
+		], callback);
+	},
+};