Moved theme middleware to new theme engine service

refs: bf0823c9a2

- continuing the work of splitting up the theme service into logical components

core/frontend/services/theme-engine/index.js

@@ -1,4 +1,5 @@
 module.exports = {
     loadCoreHelpers: require('./handlebars/helpers').loadCoreHelpers,
-    getActive: require('./active').get
+    getActive: require('./active').get,
+    middleware: require('./middleware')
 };

core/frontend/services/theme-engine/middleware.js

@@ -1,13 +1,13 @@
 const _ = require('lodash');
-const hbs = require('../theme-engine/engine');
+const hbs = require('./engine');
 const urlUtils = require('../../../shared/url-utils');
 const config = require('../../../shared/config');
 const {i18n} = require('../proxy');
 const errors = require('@tryghost/errors');
 const settingsCache = require('../../../server/services/settings/cache');
 const labs = require('../../../server/services/labs');
-const activeTheme = require('../theme-engine/active');
-const preview = require('../theme-engine/preview');
+const activeTheme = require('./active');
+const preview = require('./preview');
 
 // ### Ensure Active Theme
 // Ensure there's a properly set & mounted active theme before attempting to serve a site request

core/frontend/services/themes/index.js

@@ -91,7 +91,6 @@ module.exports = {
             });
     },
     storage: require('./storage'),
-    middleware: require('./middleware'),
     /**
      * Load all inactive themes
      */

core/server/web/site/app.js

@@ -15,8 +15,7 @@ const urlUtils = require('../../../shared/url-utils');
 const sitemapHandler = require('../../../frontend/services/sitemap/handler');
 const appService = require('../../../frontend/services/apps');
 const themeEngine = require('../../../frontend/services/theme-engine');
-const themeService = require('../../../frontend/services/themes');
-const themeMiddleware = themeService.middleware;
+const themeMiddleware = themeEngine.middleware;
 const membersMiddleware = require('../../services/members').middleware;
 const siteRoutes = require('./routes');
 const shared = require('../shared');

test/unit/services/theme-engine/middleware_spec.js

@@ -1,11 +1,10 @@
 const should = require('should');
 const sinon = require('sinon');
 const hbs = require('../../../../core/frontend/services/theme-engine/engine');
-const themeService = require('../../../../core/frontend/services/themes');
+const middleware = require('../../../../core/frontend/services/theme-engine').middleware;
 // is only exposed via themeEngine.getActive()
 const activeTheme = require('../../../../core/frontend/services/theme-engine/active');
 const settingsCache = require('../../../../core/server/services/settings/cache');
-const middleware = themeService.middleware;
 
 const sandbox = sinon.createSandbox();