From 7f5995d2fac9ae152a8ead3134a0d3400dce09ea Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Claus-Peter=20H=C3=BCbner?= <claus-peter.huebner@email.de>
Date: Fri, 1 Jul 2022 00:40:10 +0200
Subject: [PATCH] add enable-check to EventProtocol configurable as
 CONFIG-Property

---
 backend/.env.dist                            |  3 ++
 backend/src/config/index.ts                  |  6 ++++
 backend/src/event/EventProtocolEmitter.ts    | 13 ++++---
 backend/src/graphql/resolver/UserResolver.ts | 36 ++++++++++++--------
 4 files changed, 39 insertions(+), 19 deletions(-)

diff --git a/backend/.env.dist b/backend/.env.dist
index db01cf4cc..aa44057e7 100644
--- a/backend/.env.dist
+++ b/backend/.env.dist
@@ -52,6 +52,9 @@ EMAIL_CODE_REQUEST_TIME=10
 # Webhook
 WEBHOOK_ELOPAGE_SECRET=secret
 
+# EventProtocol
+EVENT_PROTOCOL_ENABLED=true
+
 # SET LOG LEVEL AS NEEDED IN YOUR .ENV
 # POSSIBLE VALUES: all | trace | debug | info | warn | error | fatal
 # LOG_LEVEL=info
diff --git a/backend/src/config/index.ts b/backend/src/config/index.ts
index 641770d4e..a92d20c57 100644
--- a/backend/src/config/index.ts
+++ b/backend/src/config/index.ts
@@ -94,6 +94,11 @@ const webhook = {
   WEBHOOK_ELOPAGE_SECRET: process.env.WEBHOOK_ELOPAGE_SECRET || 'secret',
 }
 
+const eventProtocol = {
+  // global switch to enable writing of EventProtocol-Entries
+  EVENT_PROTOCOL_ENABLED: process.env.EVENT_PROTOCOL_ENABLED === 'true' || false,
+}
+
 // This is needed by graphql-directive-auth
 process.env.APP_SECRET = server.JWT_SECRET
 
@@ -118,6 +123,7 @@ const CONFIG = {
   ...email,
   ...loginServer,
   ...webhook,
+  ...eventProtocol,
 }
 
 export default CONFIG
diff --git a/backend/src/event/EventProtocolEmitter.ts b/backend/src/event/EventProtocolEmitter.ts
index 1e70880a4..4910bcdfa 100644
--- a/backend/src/event/EventProtocolEmitter.ts
+++ b/backend/src/event/EventProtocolEmitter.ts
@@ -4,8 +4,14 @@ import { EventProtocolType } from './EventProtocolType'
 import { EventProtocol } from '@entity/EventProtocol'
 import { getConnection } from '@dbTools/typeorm'
 import Decimal from 'decimal.js-light'
+import CONFIG from '@/config'
 
-class EventProtocolEmitter extends EventEmitter { }
+class EventProtocolEmitter extends EventEmitter {
+  public isEnabled() {
+    logger.info(`EventProtocol - isEnabled=${CONFIG.EVENT_PROTOCOL_ENABLED}`)
+    return CONFIG.EVENT_PROTOCOL_ENABLED
+  }
+}
 export const eventProtocol = new EventProtocolEmitter()
 
 eventProtocol.on('error', (err) => {
@@ -329,11 +335,11 @@ async function writeEvent(
   // eslint-disable-next-line no-unused-expressions
   amount ? (dbEvent.amount = amount) : null
   // set event values here when having the result ...
-  //  await dbEvent.save()
+  // dbEvent.save()
 
   const queryRunner = getConnection().createQueryRunner('master')
   await queryRunner.connect()
-  await queryRunner.startTransaction('READ UNCOMMITTED')
+  await queryRunner.startTransaction('REPEATABLE READ')
   try {
     await queryRunner.manager.save(dbEvent).catch((error) => {
       logger.error('Error while saving dbEvent', error)
@@ -348,4 +354,3 @@ async function writeEvent(
     await queryRunner.release()
   }
 }
-
diff --git a/backend/src/graphql/resolver/UserResolver.ts b/backend/src/graphql/resolver/UserResolver.ts
index fed5530f8..0bf37e82e 100644
--- a/backend/src/graphql/resolver/UserResolver.ts
+++ b/backend/src/graphql/resolver/UserResolver.ts
@@ -387,26 +387,30 @@ export class UserResolver {
         logger.info('redeemCode found contributionLink=' + contributionLink)
         if (contributionLink) {
           dbUser.contributionLinkId = contributionLink.id
-          eventProtocol.emit(
-            EventProtocolType.REDEEM_REGISTER,
-            new Date(Date.now()),
-            dbUser.id,
-            null,
-            contributionLink.id,
-          )
+          if (eventProtocol.isEnabled()) {
+            eventProtocol.emit(
+              EventProtocolType.REDEEM_REGISTER,
+              new Date(Date.now()),
+              dbUser.id,
+              null,
+              contributionLink.id,
+            )
+          }
         }
       } else {
         const transactionLink = await dbTransactionLink.findOne({ code: redeemCode })
         logger.info('redeemCode found transactionLink=' + transactionLink)
         if (transactionLink) {
           dbUser.referrerId = transactionLink.userId
-          eventProtocol.emit(
-            EventProtocolType.REDEEM_REGISTER,
-            new Date(Date.now()),
-            dbUser.id,
-            transactionLink.id,
-            null,
-          )
+          if (eventProtocol.isEnabled()) {
+            eventProtocol.emit(
+              EventProtocolType.REDEEM_REGISTER,
+              new Date(Date.now()),
+              dbUser.id,
+              transactionLink.id,
+              null,
+            )
+          }
         }
       }
     }
@@ -461,8 +465,10 @@ export class UserResolver {
       await queryRunner.release()
     }
     logger.info('createUser() successful...')
-    eventProtocol.emit(EventProtocolType.REGISTER, new Date(Date.now()), dbUser.id)
 
+    if (eventProtocol.isEnabled()) {
+      eventProtocol.emit(EventProtocolType.REGISTER, new Date(Date.now()), dbUser.id)
+    }
     return new User(dbUser)
   }