Add datasets importing functionality

src/server/routes/imports/index.js

@@ -0,0 +1,27 @@
+/*
+ * Copyright (C) 2018 Shivam Tripathi
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+import ImportRecentRouter from './recent';
+import express from 'express';
+
+
+const importRouter = express.Router();
+
+importRouter.use('/recent', ImportRecentRouter);
+
+export default importRouter;

src/server/routes/imports/recent.js

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+/*
+ * Copyright (C) 2018 Shivam Tripathi
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+import * as propHelpers from '../../../client/helpers/props';
+import {escapeProps, generateProps} from '../../helpers/props';
+import Layout from '../../../client/containers/layout';
+import React from 'react';
+import ReactDOMServer from 'react-dom/server';
+import RecentImports from '../../../client/components/pages/recent-imports';
+import express from 'express';
+
+
+// The limit for number of results fetched from database
+const LIMIT = 10;
+
+const router = express.Router();
+
+/* Function to fetch data from the database and create the object to be sent as
+	response */
+function fetchRecentImportsData(orm, page) {
+	let pageNumber = page;
+
+	return orm.bookshelf.transaction(async (transacting) => {
+		// First fetch total imports
+		const totalResults =
+			await orm.func.imports.getTotalImports(transacting);
+
+		if (totalResults < ((pageNumber - 1) * LIMIT)) {
+			pageNumber = Math.ceil(totalResults / LIMIT);
+		}
+		const offset = (pageNumber - 1) * LIMIT;
+
+		// Now fetch recent imports according to the generated offset
+		const recentImports = await orm.func.imports.getRecentImports(
+			orm, transacting, LIMIT, offset
+		);
+
+		return {
+			currentPage: pageNumber,
+			limit: LIMIT,
+			offset,
+			recentImports,
+			totalResults
+		};
+	});
+}
+
+// This handles the router to send initial container to hold recentImports data
+function recentImportsRoute(req, res) {
+	const queryPage = parseInt(req.query.page, 10) || 1;
+	const props = generateProps(req, res, {
+		currentPage: queryPage, limit: LIMIT
+	});
+
+	const markup = ReactDOMServer.renderToString(
+		<Layout {...propHelpers.extractLayoutProps(props)}>
+			<RecentImports
+				{...props}
+			/>
+		</Layout>
+	);
+
+	res.render('target', {
+		markup,
+		props: escapeProps(props),
+		script: '/js/recent-imports.js',
+		title: 'Recent Imports'
+	});
+}
+
+// This handles the data fetching route for recent imports, sends JSON as res
+async function rawRecentImportsRoute(req, res) {
+	const {orm} = req.app.locals;
+	const queryPage = parseInt(req.query.page, 10) || 1;
+	const recentImportsData = await fetchRecentImportsData(orm, queryPage);
+
+	res.send(recentImportsData);
+}
+
+router.get('/', recentImportsRoute);
+router.get('/raw', rawRecentImportsRoute);
+
+export default router;