From 84bed1f82450e6c1ba2367ad3d5c34422de03e46 Mon Sep 17 00:00:00 2001
From: Grafcube <grafcube@disroot.org>
Date: Tue, 10 Mar 2026 16:37:40 +0530
Subject: [PATCH] Edit your last message with sed commands

You can use sed commands like `s/old text/new text` to edit the last
message you sent. It does not support all sed features, just simple text
replacement.

Regex pattern: `/\As\/([^\/]+)\/([^\n\r]*?)\/?\s*\Z/`
---
 .../matrix_command_component.dart             | 24 ++++++++++++++++++-
 1 file changed, 23 insertions(+), 1 deletion(-)

diff --git a/commet/lib/client/matrix/components/command_component/matrix_command_component.dart b/commet/lib/client/matrix/components/command_component/matrix_command_component.dart
index 42fd5c396..eef66fdcc 100644
--- a/commet/lib/client/matrix/components/command_component/matrix_command_component.dart
+++ b/commet/lib/client/matrix/components/command_component/matrix_command_component.dart
@@ -10,6 +10,7 @@ import 'package:commet/client/matrix/matrix_room.dart';
 import 'package:commet/client/matrix/timeline_events/matrix_timeline_event.dart';
 import 'package:commet/client/room.dart';
 import 'package:commet/client/timeline_events/timeline_event.dart';
+import 'package:commet/client/timeline_events/timeline_event_message.dart';
 import 'package:commet/debug/log.dart';
 import 'package:commet/ui/organisms/chat/chat.dart';
 import 'package:commet/utils/color_utils.dart';
@@ -22,6 +23,8 @@ class MatrixCommandComponent extends CommandComponent<MatrixClient> {
   @override
   MatrixClient client;
 
+  static RegExp sed_pattern = RegExp(r'^s\/([^\/]+)\/([^\n\r]*?)\/?\s*$');
+
   MatrixCommandComponent(this.client) {
     client.getMatrixClient().addCommand("sendjson", sendJson);
     client.getMatrixClient().addCommand("status", setStatus);
@@ -45,6 +48,25 @@ class MatrixCommandComponent extends CommandComponent<MatrixClient> {
       event = (interactingEvent as MatrixTimelineEvent).event;
     }
 
+    var match = sed_pattern.firstMatch(string);
+
+    if (match != null && interactingEvent == null && type == null) {
+      TimelineEvent? editingEvent;
+      for (final event in room.timeline!.events.take(20)) {
+        if (event.senderId != room.client.self!.identifier) continue;
+        if (event is! TimelineEventMessage) continue;
+        editingEvent = event;
+        break;
+      }
+      if (editingEvent != null) {
+        await room.sendMessage(
+            message:
+                editingEvent.plainTextBody.replaceFirst(match[1]!, match[2]!),
+            replaceEvent: editingEvent);
+        return;
+      }
+    }
+
     await client.getMatrixClient().parseAndRunCommand(
           mxRoom,
           string,
@@ -59,7 +81,7 @@ class MatrixCommandComponent extends CommandComponent<MatrixClient> {
     if (string.startsWith("/")) {
       var command = string.substring(1).split(" ").first;
       return client.getMatrixClient().commands.containsKey(command);
-    }
+    } else if (sed_pattern.firstMatch(string) != null) return true;
 
     return false;
   }