csv export

api/src/middleware/reponse-manager.ts

@@ -1,28 +0,0 @@
-import { RequestHandler } from 'express';
-import asyncHandler from 'express-async-handler';
-import fs from 'fs';
-
-/**
- *  middleware to manage actions on responses such as
- * export / import and caching
- * @todo move caching into here.
- *
- */
-
-const responseManager: RequestHandler = asyncHandler(async (req, res, next) => {
-	if (!req.query.export) return next();
-
-	const exportType = req.query.export;
-
-	if (exportType === 'json') {
-		// have chose to export json
-	}
-
-	if (exportType === 'csv') {
-		// have chosen to export csv
-	}
-
-	return next();
-});
-
-export default responseManager;

api/src/middleware/response-manager.ts

@@ -0,0 +1,44 @@
+import { RequestHandler } from 'express';
+import asyncHandler from 'express-async-handler';
+import { ExportFailedException } from '../exceptions';
+
+/**
+ *  middleware to manage actions on responses such as
+ * export / import and caching
+ * @todo move caching into here.
+ *
+ */
+
+const responseManager: RequestHandler = asyncHandler(async (req, res, next) => {
+	if (!req.query.export) return next();
+	// only want to export out on get
+	if (req.method == 'GET') {
+		const exportType = req.query.export;
+
+		if (exportType == 'json') {
+			// have chosen to export json
+		}
+
+		if (exportType == 'csv') {
+			// have chosen to export csv
+			console.log('get here');
+			const { Parser } = require('json2csv');
+			const exportData = res.json;
+
+			const fields = Object.keys(exportData);
+
+			Parser({ data: exportData }, function (err: any, csvStr: string) {
+				if (err) {
+					throw new ExportFailedException('CSV generation failed');
+				}
+				res.type('text/csv');
+				res.attachment('export-file.csv');
+				res.send(csvStr);
+			});
+		}
+	}
+
+	return next();
+});
+
+export default responseManager;