From bd6f1d509017e624e349454d9bec4a9589f72e6f Mon Sep 17 00:00:00 2001
From: Jeremy Kahn <jeremyckahn@gmail.com>
Date: Tue, 25 Oct 2022 20:17:58 -0500
Subject: [PATCH] feat: [closes #46] limit chat transcripts to 10,000 messages

---
 src/components/Room/useRoom.ts | 10 ++++++++--
 src/config/messaging.ts        |  1 +
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/src/components/Room/useRoom.ts b/src/components/Room/useRoom.ts
index ab6a0a5..d2ae979 100644
--- a/src/components/Room/useRoom.ts
+++ b/src/components/Room/useRoom.ts
@@ -6,13 +6,15 @@ import { v4 as uuid } from 'uuid'
 import { ShellContext } from 'contexts/ShellContext'
 import { SettingsContext } from 'contexts/SettingsContext'
 import { PeerActions } from 'models/network'
-import { ReceivedMessage, UnsentMessage } from 'models/chat'
+import { ReceivedMessage, UnsentMessage, Message } from 'models/chat'
 import { funAnimalName } from 'fun-animal-names'
 import { getPeerName } from 'components/PeerNameDisplay'
 import { NotificationService } from 'services/Notification'
 import { Audio } from 'services/Audio'
 import { PeerRoom } from 'services/PeerRoom'
 
+import { messageTranscriptSizeLimit } from 'config/messaging'
+
 import { usePeerRoomAction } from './usePeerRoomAction'
 
 interface UseRoomConfig {
@@ -30,13 +32,17 @@ export function useRoom(
   const shellContext = useContext(ShellContext)
   const settingsContext = useContext(SettingsContext)
   const [isMessageSending, setIsMessageSending] = useState(false)
-  const [messageLog, setMessageLog] = useState<
+  const [messageLog, _setMessageLog] = useState<
     Array<ReceivedMessage | UnsentMessage>
   >([])
   const [newMessageAudio] = useState(
     () => new Audio(process.env.PUBLIC_URL + '/sounds/new-message.aac')
   )
 
+  const setMessageLog = (messages: Message[]) => {
+    _setMessageLog(messages.slice(-messageTranscriptSizeLimit))
+  }
+
   useEffect(() => {
     return () => {
       peerRoom.leaveRoom()
diff --git a/src/config/messaging.ts b/src/config/messaging.ts
index 3a7b72a..eb42d02 100644
--- a/src/config/messaging.ts
+++ b/src/config/messaging.ts
@@ -1 +1,2 @@
 export const messageCharacterSizeLimit = 10_000
+export const messageTranscriptSizeLimit = 10_000