From cd5f8f74070e4e95b2eaff3f87051649f98d33d8 Mon Sep 17 00:00:00 2001
From: Jun Wu <quark@lihdd.net>
Date: Sat, 1 Apr 2023 11:38:52 -0700
Subject: [PATCH] app: polyfill Array.at

This fixes compatibility issue with older browsers like WeChat webview.
The summary feature now works as expected.
---
 app/requests.ts  |  4 ++++
 app/store/app.ts |  4 ++++
 package.json     |  3 ++-
 yarn.lock        | 10 ++++++++++
 4 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/app/requests.ts b/app/requests.ts
index f4db7a1b..56fd6cb5 100644
--- a/app/requests.ts
+++ b/app/requests.ts
@@ -2,6 +2,10 @@ import type { ChatRequest, ChatReponse } from "./api/openai/typing";
 import { filterConfig, Message, ModelConfig, useAccessStore } from "./store";
 import Locale from "./locales";
 
+if (!Array.prototype.at) {
+  require('array.prototype.at/auto');
+}
+
 const TIME_OUT_MS = 30000;
 
 const makeRequestParam = (
diff --git a/app/store/app.ts b/app/store/app.ts
index 6ab3229a..cc52a3c7 100644
--- a/app/store/app.ts
+++ b/app/store/app.ts
@@ -11,6 +11,10 @@ import { trimTopic } from "../utils";
 
 import Locale from "../locales";
 
+if (!Array.prototype.at) {
+  require('array.prototype.at/auto');
+}
+
 export type Message = ChatCompletionResponseMessage & {
   date: string;
   streaming?: boolean;
diff --git a/package.json b/package.json
index eb17000e..7c6832ed 100644
--- a/package.json
+++ b/package.json
@@ -23,9 +23,9 @@
     "react": "^18.2.0",
     "react-dom": "^18.2.0",
     "react-markdown": "^8.0.5",
-    "remark-breaks": "^3.0.2",
     "rehype-katex": "^6.0.2",
     "rehype-prism-plus": "^1.5.1",
+    "remark-breaks": "^3.0.2",
     "remark-gfm": "^3.0.1",
     "remark-math": "^5.1.1",
     "sass": "^1.59.2",
@@ -39,6 +39,7 @@
     "@types/react-dom": "^18.0.11",
     "@types/react-katex": "^3.0.0",
     "@types/spark-md5": "^3.0.2",
+    "array.prototype.at": "^1.1.1",
     "cross-env": "^7.0.3",
     "eslint": "^8.36.0",
     "eslint-config-next": "13.2.3",
diff --git a/yarn.lock b/yarn.lock
index 9f98a244..246b818b 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1570,6 +1570,16 @@ array-union@^2.1.0:
   resolved "https://registry.yarnpkg.com/array-union/-/array-union-2.1.0.tgz#b798420adbeb1de828d84acd8a2e23d3efe85e8d"
   integrity sha512-HGyxoOTYUyCM6stUe6EJgnd4EoewAI7zMdfqO+kGjnlZmBDz/cR5pf8r/cR4Wq60sL/p0IkcjUEEPwS3GFrIyw==
 
+array.prototype.at@^1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/array.prototype.at/-/array.prototype.at-1.1.1.tgz#6deda3cd3c704afa16361387ea344e0b8d8831b5"
+  integrity sha512-n/wYNLJy/fVEU9EGPt2ww920hy1XX3XB2yTREFy1QsxctBgQV/tZIwg1G8jVxELna4pLCzg/xvvS/DDXtI4NNg==
+  dependencies:
+    call-bind "^1.0.2"
+    define-properties "^1.1.4"
+    es-abstract "^1.20.4"
+    es-shim-unscopables "^1.0.0"
+
 array.prototype.flat@^1.3.1:
   version "1.3.1"
   resolved "https://registry.yarnpkg.com/array.prototype.flat/-/array.prototype.flat-1.3.1.tgz#ffc6576a7ca3efc2f46a143b9d1dda9b4b3cf5e2"