Add back in legacy bwc route

x-pack/plugins/reporting/server/routes/legacy.ts

@@ -0,0 +1,81 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License;
+ * you may not use this file except in compliance with the Elastic License.
+ */
+
+import { schema } from '@kbn/config-schema';
+import querystring from 'querystring';
+import { authorizedUserPreRoutingFactory } from './lib/authorized_user_pre_routing';
+import { API_BASE_URL } from '../../common/constants';
+import { HandlerErrorFunction, HandlerFunction } from './types';
+import { ReportingCore } from '../core';
+import { LevelLogger } from '../lib';
+
+const BASE_GENERATE = `${API_BASE_URL}/generate`;
+
+export function registerLegacy(
+  reporting: ReportingCore,
+  handler: HandlerFunction,
+  handleError: HandlerErrorFunction,
+  logger: LevelLogger
+) {
+  const { router } = reporting.getPluginSetupDeps();
+  const userHandler = authorizedUserPreRoutingFactory(reporting);
+
+  function createLegacyPdfRoute({ path, objectType }: { path: string; objectType: string }) {
+    const exportTypeId = 'printablePdf';
+
+    router.post(
+      {
+        path,
+        validate: {
+          params: schema.object({
+            savedObjectId: schema.string({ minLength: 3 }),
+          }),
+          query: schema.any(),
+        },
+      },
+
+      userHandler(async (user, context, req, res) => {
+        const message = `The following URL is deprecated and will stop working in the next major version: ${req.url.path}`;
+        logger.warn(message, ['deprecation']);
+
+        try {
+          const { savedObjectId }: { savedObjectId: string } = req.params as any;
+          const queryString = querystring.stringify(req.query as any);
+
+          return await handler(
+            user,
+            exportTypeId,
+            {
+              objectType,
+              savedObjectId,
+              queryString,
+            },
+            context,
+            req,
+            res
+          );
+        } catch (err) {
+          throw handleError(res, err);
+        }
+      })
+    );
+  }
+
+  createLegacyPdfRoute({
+    path: `${BASE_GENERATE}/visualization/{savedId}`,
+    objectType: 'visualization',
+  });
+
+  createLegacyPdfRoute({
+    path: `${BASE_GENERATE}/search/{savedId}`,
+    objectType: 'search',
+  });
+
+  createLegacyPdfRoute({
+    path: `${BASE_GENERATE}/dashboard/{savedId}`,
+    objectType: 'dashboard',
+  });
+}