chore (ai): remove getUIText() (#6202)

## Background

`getUIText()` was introduced as a helper when `uiMessage.content` was
removed. However, chatbots without special parts are increasingly
uncommon, and the helper feels out of place.

## Summary

Remove the `getUIText()` function.

Author: lgrammel

.changeset/fresh-swans-march.md

@@ -0,0 +1,5 @@
+---
+'ai': major
+---
+
+chore (ai): remove getUIText helper

examples/next-fastapi/app/(examples)/01-chat-text/page.tsx

@@ -2,7 +2,6 @@
 
 import { Card } from '@/app/components';
 import { useChat } from '@ai-sdk/react';
-import { getUIText } from 'ai';
 
 export default function Page() {
   const { messages, input, handleSubmit, handleInputChange, status } = useChat({
@@ -17,7 +16,9 @@ export default function Page() {
           <div key={message.id} className="flex flex-row gap-2">
             <div className="flex-shrink-0 w-24 text-zinc-500">{`${message.role}: `}</div>
             <div className="flex flex-col gap-2">
-              {getUIText(message.parts)}
+              {message.parts
+                .map(part => (part.type === 'text' ? part.text : ''))
+                .join('')}
             </div>
           </div>
         ))}

examples/next-langchain/app/api/chat/route.ts

@@ -1,7 +1,7 @@
 import { toDataStream } from '@ai-sdk/langchain';
 import { AIMessage, HumanMessage } from '@langchain/core/messages';
 import { ChatOpenAI } from '@langchain/openai';
-import { createDataStreamResponse, getUIText, UIMessage } from 'ai';
+import { createDataStreamResponse, UIMessage } from 'ai';
 
 // Allow streaming responses up to 30 seconds
 export const maxDuration = 30;
@@ -21,8 +21,16 @@ export async function POST(req: Request) {
   const stream = await model.stream(
     messages.map(message =>
       message.role == 'user'
-        ? new HumanMessage(getUIText(message.parts))
-        : new AIMessage(getUIText(message.parts)),
+        ? new HumanMessage(
+            message.parts
+              .map(part => (part.type === 'text' ? part.text : ''))
+              .join(''),
+          )
+        : new AIMessage(
+            message.parts
+              .map(part => (part.type === 'text' ? part.text : ''))
+              .join(''),
+          ),
     ),
   );
 

examples/next-langchain/app/page.tsx

@@ -1,7 +1,6 @@
 'use client';
 
 import { useChat } from '@ai-sdk/react';
-import { getUIText } from 'ai';
 
 export default function Chat() {
   const { messages, input, handleInputChange, handleSubmit } = useChat();
@@ -12,7 +11,9 @@ export default function Chat() {
         ? messages.map(m => (
             <div key={m.id} className="whitespace-pre-wrap">
               {m.role === 'user' ? 'User: ' : 'AI: '}
-              {getUIText(m.parts)}
+              {m.parts
+                .map(part => (part.type === 'text' ? part.text : ''))
+                .join('')}
             </div>
           ))
         : null}

examples/next-openai-kasada-bot-protection/app/page.tsx

@@ -1,7 +1,6 @@
 'use client';
 
 import { useChat } from '@ai-sdk/react';
-import { getUIText } from 'ai';
 import { toast } from 'sonner';
 
 export default function Chat() {
@@ -17,7 +16,9 @@ export default function Chat() {
         ? messages.map(m => (
             <div key={m.id} className="whitespace-pre-wrap">
               {m.role === 'user' ? 'User: ' : 'AI: '}
-              {getUIText(m.parts)}
+              {m.parts
+                .map(part => (part.type === 'text' ? part.text : ''))
+                .join('')}
             </div>
           ))
         : null}

examples/next-openai-pages/pages/chat/stream-chat-api-route/index.tsx

@@ -1,5 +1,4 @@
 import { useChat } from '@ai-sdk/react';
-import { getUIText } from 'ai';
 
 export default function Chat() {
   const { messages, input, handleInputChange, handleSubmit, status } = useChat({
@@ -12,7 +11,11 @@ export default function Chat() {
         {messages.map(message => (
           <div key={message.id} className="flex flex-row gap-2">
             <div className="w-24 text-zinc-500">{`${message.role}: `}</div>
-            <div className="w-full">{getUIText(message.parts)}</div>
+            <div className="w-full">
+              {message.parts
+                .map(part => (part.type === 'text' ? part.text : ''))
+                .join('')}
+            </div>
           </div>
         ))}
       </div>

examples/next-openai-pages/pages/chat/stream-chat-edge/index.tsx

@@ -1,5 +1,4 @@
 import { useChat } from '@ai-sdk/react';
-import { getUIText } from 'ai';
 
 export default function Chat() {
   const { messages, input, handleInputChange, handleSubmit, status } = useChat({
@@ -12,7 +11,11 @@ export default function Chat() {
         {messages.map(message => (
           <div key={message.id} className="flex flex-row gap-2">
             <div className="w-24 text-zinc-500">{`${message.role}: `}</div>
-            <div className="w-full">{getUIText(message.parts)}</div>
+            <div className="w-full">
+              {message.parts
+                .map(part => (part.type === 'text' ? part.text : ''))
+                .join('')}
+            </div>
           </div>
         ))}
       </div>

examples/next-openai-pages/pages/chat/stream-chat/index.tsx

@@ -1,5 +1,4 @@
 import { useChat } from '@ai-sdk/react';
-import { getUIText } from 'ai';
 
 export default function Page() {
   const { messages, input, handleSubmit, handleInputChange, status } = useChat({
@@ -12,7 +11,11 @@ export default function Page() {
         {messages.map(message => (
           <div key={message.id} className="flex flex-row gap-2">
             <div className="w-24 text-zinc-500">{`${message.role}: `}</div>
-            <div className="w-full">{getUIText(message.parts)}</div>
+            <div className="w-full">
+              {message.parts
+                .map(part => (part.type === 'text' ? part.text : ''))
+                .join('')}
+            </div>
           </div>
         ))}
       </div>

examples/next-openai-upstash-rate-limits/app/page.tsx

@@ -1,7 +1,6 @@
 'use client';
 
 import { useChat } from '@ai-sdk/react';
-import { getUIText } from 'ai';
 import { toast } from 'sonner';
 
 export default function Chat() {
@@ -17,7 +16,9 @@ export default function Chat() {
         ? messages.map(m => (
             <div key={m.id} className="whitespace-pre-wrap">
               {m.role === 'user' ? 'User: ' : 'AI: '}
-              {getUIText(m.parts)}
+              {m.parts
+                .map(part => (part.type === 'text' ? part.text : ''))
+                .join('')}
             </div>
           ))
         : null}

examples/next-openai/app/mcp/page.tsx

@@ -1,7 +1,6 @@
 'use client';
 
 import { useChat } from '@ai-sdk/react';
-import { getUIText } from 'ai';
 
 export default function Chat() {
   const {
@@ -26,7 +25,9 @@ export default function Chat() {
       {messages.map(m => (
         <div key={m.id} className="whitespace-pre-wrap">
           {m.role === 'user' ? 'User: ' : 'AI: '}
-          {getUIText(m.parts)}
+          {m.parts
+            .map(part => (part.type === 'text' ? part.text : ''))
+            .join('')}
         </div>
       ))}