From bab867a1bd01660ac89e9d190d79f4036a818bc2 Mon Sep 17 00:00:00 2001
From: Moriz Wahl <moriz.wahl@gmx.de>
Date: Wed, 22 Jun 2022 16:02:28 +0200
Subject: [PATCH] add global event handler middleware

---
 backend/src/config/index.ts            |  2 +-
 backend/src/graphql/schema.ts          |  2 ++
 backend/src/middleware/EventHandler.ts | 15 +++++++++++++++
 3 files changed, 18 insertions(+), 1 deletion(-)
 create mode 100644 backend/src/middleware/EventHandler.ts

diff --git a/backend/src/config/index.ts b/backend/src/config/index.ts
index 4e6dd8099..eae01a51f 100644
--- a/backend/src/config/index.ts
+++ b/backend/src/config/index.ts
@@ -10,7 +10,7 @@ Decimal.set({
 })
 
 const constants = {
-  DB_VERSION: '0040-add_contribution_link_id_to_user',
+  DB_VERSION: '0041-add_event_protocol_table',
   DECAY_START_TIME: new Date('2021-05-13 17:46:31-0000'), // GMT+0
   LOG4JS_CONFIG: 'log4js-config.json',
   // default log level on production should be info
diff --git a/backend/src/graphql/schema.ts b/backend/src/graphql/schema.ts
index f14f45efa..6b1579ea4 100644
--- a/backend/src/graphql/schema.ts
+++ b/backend/src/graphql/schema.ts
@@ -1,6 +1,7 @@
 import { GraphQLSchema } from 'graphql'
 import { buildSchema } from 'type-graphql'
 import path from 'path'
+import { EventHandler } from '@/middleware/EventHandler'
 
 import isAuthorized from './directive/isAuthorized'
 import DecimalScalar from './scalar/Decimal'
@@ -11,6 +12,7 @@ const schema = async (): Promise<GraphQLSchema> => {
     resolvers: [path.join(__dirname, 'resolver', `!(*.test).{js,ts}`)],
     authChecker: isAuthorized,
     scalarsMap: [{ type: Decimal, scalar: DecimalScalar }],
+    globalMiddlewares: [EventHandler],
   })
 }
 
diff --git a/backend/src/middleware/EventHandler.ts b/backend/src/middleware/EventHandler.ts
new file mode 100644
index 000000000..35b9d0b7b
--- /dev/null
+++ b/backend/src/middleware/EventHandler.ts
@@ -0,0 +1,15 @@
+import { MiddlewareFn } from 'type-graphql'
+import { EventProtocol } from '@entity/EventProtocol'
+
+export const EventHandler: MiddlewareFn = async (
+  /* eslint-disable-next-line @typescript-eslint/no-unused-vars */
+  { root, args, context, info },
+  next,
+) => {
+  const event = new EventProtocol()
+  // set values before calling the resolver here
+  const result = await next()
+  // set event values here when having the result ...
+  await event.save()
+  return result
+}