fix(discord): keep voice log previews UTF-16 safe

sunlit-deng · sunlit-deng · commit 9cf63281afbc · 2026-07-04T22:01:21.000+08:00
diff --git a/extensions/discord/src/voice/log-preview.test.ts b/extensions/discord/src/voice/log-preview.test.ts
@@ -10,4 +10,10 @@ describe("formatVoiceLogPreview", () => {
     const preview = formatVoiceLogPreview("x".repeat(501));
     expect(preview).toBe(`${"x".repeat(500)}...`);
   });
+
+  it("does not split emoji when the preview limit lands inside a surrogate pair", () => {
+    const preview = formatVoiceLogPreview(`${"x".repeat(499)}😀tail`);
+    expect(preview).toBe(`${"x".repeat(499)}...`);
+    expect(preview).not.toMatch(/[\uD800-\uDFFF]/u);
+  });
 });
diff --git a/extensions/discord/src/voice/log-preview.ts b/extensions/discord/src/voice/log-preview.ts
@@ -1,9 +1,11 @@
+import { truncateUtf16Safe } from "openclaw/plugin-sdk/text-utility-runtime";
+
 const DISCORD_VOICE_LOG_PREVIEW_CHARS = 500;
 
 export function formatVoiceLogPreview(text: string): string {
   const oneLine = text.replace(/\s+/g, " ").trim();
   if (oneLine.length <= DISCORD_VOICE_LOG_PREVIEW_CHARS) {
     return oneLine;
   }
-  return `${oneLine.slice(0, DISCORD_VOICE_LOG_PREVIEW_CHARS)}...`;
+  return `${truncateUtf16Safe(oneLine, DISCORD_VOICE_LOG_PREVIEW_CHARS)}...`;
 }

Original file line number	Diff line number	Diff line change
`@@ -1,9 +1,11 @@`
	`1`	`+import { truncateUtf16Safe } from "openclaw/plugin-sdk/text-utility-runtime";`
	`2`	`+`
`1`	`3`	`const DISCORD_VOICE_LOG_PREVIEW_CHARS = 500;`
`2`	`4`
`3`	`5`	`export function formatVoiceLogPreview(text: string): string {`
`4`	`6`	`const oneLine = text.replace(/\s+/g, " ").trim();`
`5`	`7`	`if (oneLine.length <= DISCORD_VOICE_LOG_PREVIEW_CHARS) {`
`6`	`8`	`return oneLine;`
`7`	`9`	`}`
`8`		- return `${oneLine.slice(0, DISCORD_VOICE_LOG_PREVIEW_CHARS)}...`;
	`10`	+ return `${truncateUtf16Safe(oneLine, DISCORD_VOICE_LOG_PREVIEW_CHARS)}...`;
`9`	`11`	`}`