From 8c47b7080d1b16df319cfadbc442f8a25e5a5a49 Mon Sep 17 00:00:00 2001
From: Vendicated <vendicated@riseup.net>
Date: Sun, 2 Apr 2023 22:14:58 +0200
Subject: [PATCH] QuickReply & Up Key: Do not attempt to edit/reply to logged
 deleted message

---
 src/plugins/messageLogger/index.tsx |  5 +++++
 src/plugins/quickReply.ts           | 13 ++++++++++---
 2 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/src/plugins/messageLogger/index.tsx b/src/plugins/messageLogger/index.tsx
index 4b4e0e911..ef9a0ece6 100644
--- a/src/plugins/messageLogger/index.tsx
+++ b/src/plugins/messageLogger/index.tsx
@@ -209,6 +209,11 @@ export default definePlugin({
                         "       m" +
                         ")" +
                         ".update($3"
+                },
+                {
+                    // fix up key (edit last message) attempting to edit a deleted message
+                    match: /(?<=getLastEditableMessage=.{0,200}\.find\(\(function\((\i)\)\{)return/,
+                    replace: "return !$1.deleted &&"
                 }
             ]
         },
diff --git a/src/plugins/quickReply.ts b/src/plugins/quickReply.ts
index a499ea412..984db188b 100644
--- a/src/plugins/quickReply.ts
+++ b/src/plugins/quickReply.ts
@@ -111,7 +111,7 @@ function jumpIfOffScreen(channelId: string, messageId: string) {
 }
 
 function getNextMessage(isUp: boolean, isReply: boolean) {
-    let messages: Message[] = MessageStore.getMessages(SelectedChannelStore.getChannelId())._array;
+    let messages: Array<Message & { deleted?: boolean; }> = MessageStore.getMessages(SelectedChannelStore.getChannelId())._array;
     if (!isReply) { // we are editing so only include own
         const meId = UserStore.getCurrentUser().id;
         messages = messages.filter(m => m.author.id === meId);
@@ -121,11 +121,18 @@ function getNextMessage(isUp: boolean, isReply: boolean) {
         ? Math.min(messages.length - 1, i + 1)
         : Math.max(-1, i - 1);
 
+    const findNextNonDeleted = (i: number) => {
+        do {
+            i = mutate(i);
+        } while (i !== -1 && messages[messages.length - i - 1]?.deleted === true);
+        return i;
+    };
+
     let i: number;
     if (isReply)
-        replyIdx = i = mutate(replyIdx);
+        replyIdx = i = findNextNonDeleted(replyIdx);
     else
-        editIdx = i = mutate(editIdx);
+        editIdx = i = findNextNonDeleted(editIdx);
 
     return i === - 1 ? undefined : messages[messages.length - i - 1];
 }