feat(ai) add attachment validations

.changeset/honest-beans-suffer.md

@@ -0,0 +1,16 @@
+---
+"@aws-amplify/ui-react-ai": minor
+"@aws-amplify/ui": patch
+---
+
+feat(ai) add attachment validations
+
+The current limitations on the Amplify AI kit for attachments is 400kb (of base64'd size) per image, and 20 images per message are now being enforced before the message is sent.
+These limits can be adjusted via props as well.
+
+```tsx
+<AIConversation
+  maxAttachments={2}
+  maxAttachmentSize={100_000} // 100,000 bytes or 100kb
+/>
+```

docs/src/components/ComponentsMetadata.ts

@@ -135,6 +135,11 @@ export const ComponentsMetadata: ComponentClassNameItems = {
     components: ['AIConversation'],
     description: 'Class applied to the form element',
   },
+  AIConversationFormError: {
+    className: ComponentClassName.AIConversationFormError,
+    components: ['AIConversation'],
+    description: 'Class applied to the error message of the form',
+  },
   AIConversationFormAttach: {
     className: ComponentClassName.AIConversationFormAttach,
     components: ['AIConversation'],

examples/next/pages/ui/components/ai/ai-conversation/attachments.page.tsx

@@ -0,0 +1,55 @@
+import * as React from 'react';
+import { Amplify } from 'aws-amplify';
+import { signOut } from 'aws-amplify/auth';
+import { createAIHooks, AIConversation } from '@aws-amplify/ui-react-ai';
+import { generateClient } from 'aws-amplify/api';
+import '@aws-amplify/ui-react/styles.css';
+
+import outputs from './amplify_outputs';
+import type { Schema } from '@environments/ai/gen2/amplify/data/resource';
+import { Authenticator, Button, Card, Flex } from '@aws-amplify/ui-react';
+
+const client = generateClient<Schema>({ authMode: 'userPool' });
+const { useAIConversation } = createAIHooks(client);
+
+Amplify.configure(outputs);
+
+function Chat() {
+  const [
+    {
+      data: { messages },
+      isLoading,
+    },
+    sendMessage,
+  ] = useAIConversation('pirateChat');
+
+  return (
+    <AIConversation
+      messages={messages}
+      isLoading={isLoading}
+      handleSendMessage={sendMessage}
+      allowAttachments
+      maxAttachmentSize={100_000}
+      maxAttachments={2}
+    />
+  );
+}
+
+export default function Example() {
+  return (
+    <Authenticator>
+      <Flex direction="column">
+        <Button
+          onClick={() => {
+            signOut();
+          }}
+        >
+          Sign out
+        </Button>
+        <Card flex="1" variation="outlined" height="400px" margin="large">
+          <Chat />
+        </Card>
+      </Flex>
+    </Authenticator>
+  );
+}

packages/react-ai/jest.config.ts

@@ -14,9 +14,9 @@ const config: Config = {
   coverageThreshold: {
     global: {
       branches: 68,
-      functions: 78,
-      lines: 87,
-      statements: 87,
+      functions: 77,
+      lines: 86,
+      statements: 86,
     },
   },
   testPathIgnorePatterns: [],

packages/react-ai/src/components/AIConversation/AIConversationProvider.tsx

@@ -37,6 +37,8 @@ export const AIConversationProvider = ({
   displayText,
   handleSendMessage,
   isLoading,
+  maxAttachmentSize,
+  maxAttachments,
   messages,
   messageRenderer,
   responseComponents,
@@ -60,7 +62,11 @@ export const AIConversationProvider = ({
               <ResponseComponentsProvider
                 responseComponents={responseComponents}
               >
-                <AttachmentProvider allowAttachments={allowAttachments}>
+                <AttachmentProvider
+                  allowAttachments={allowAttachments}
+                  maxAttachmentSize={maxAttachmentSize}
+                  maxAttachments={maxAttachments}
+                >
                   <ConversationDisplayTextProvider {..._displayText}>
                     <ConversationInputContextProvider>
                       <SendMessageContextProvider

packages/react-ai/src/components/AIConversation/__tests__/__snapshots__/displayText.test.tsx.snap

@@ -2,6 +2,8 @@
 
 exports[`displayText should match snapshot 1`] = `
 [
+  "getAttachmentSizeErrorText",
+  "getMaxAttachmentErrorText",
   "getMessageTimestampText",
 ]
 `;

packages/react-ai/src/components/AIConversation/__tests__/utils.test.tsx

@@ -2,6 +2,7 @@ import {
   convertBufferToBase64,
   formatDate,
   getImageTypeFromMimeType,
+  attachmentsValidator,
 } from '../utils';
 
 describe('convertBufferToBase64', () => {
@@ -57,3 +58,91 @@ describe('getImageTypeFromMimeType', () => {
     expect(getImageTypeFromMimeType('image/webp')).toBe('webp');
   });
 });
+
+describe('attachmentsValidator', () => {
+  // Helper function to create mock files
+  const createMockFile = (size: number, name = 'test.txt'): File => {
+    const buffer = new ArrayBuffer(size);
+    File.prototype.arrayBuffer = jest.fn().mockResolvedValueOnce(buffer);
+    return new File([buffer], name, { type: 'text/plain' });
+  };
+
+  it('should accept files within size limit', async () => {
+    const files = [createMockFile(100)];
+    const result = await attachmentsValidator({
+      files,
+      maxAttachments: 3,
+      maxAttachmentSize: 1000,
+    });
+
+    expect(result.acceptedFiles).toHaveLength(1);
+    expect(result.rejectedFiles).toHaveLength(0);
+    expect(result.hasMaxAttachmentSizeError).toBeFalsy();
+    expect(result.hasMaxAttachmentsError).toBeUndefined();
+  });
+
+  it('should reject files exceeding size limit', async () => {
+    const files = [createMockFile(2000)];
+    const result = await attachmentsValidator({
+      files,
+      maxAttachments: 3,
+      maxAttachmentSize: 1000,
+    });
+
+    expect(result.acceptedFiles).toHaveLength(0);
+    expect(result.rejectedFiles).toHaveLength(1);
+    expect(result.hasMaxAttachmentSizeError).toBeTruthy();
+    expect(result.hasMaxAttachmentsError).toBeUndefined();
+  });
+
+  it('should handle mixed valid and invalid file sizes', async () => {
+    const files = [
+      createMockFile(500),
+      createMockFile(2000),
+      createMockFile(800),
+    ];
+    const result = await attachmentsValidator({
+      files,
+      maxAttachments: 3,
+      maxAttachmentSize: 1000,
+    });
+
+    expect(result.acceptedFiles).toHaveLength(2);
+    expect(result.rejectedFiles).toHaveLength(1);
+    expect(result.hasMaxAttachmentSizeError).toBeTruthy();
+    expect(result.hasMaxAttachmentsError).toBeUndefined();
+  });
+
+  it('should enforce maximum number of attachments', async () => {
+    const files = [
+      createMockFile(100),
+      createMockFile(200),
+      createMockFile(300),
+      createMockFile(400),
+    ];
+    const result = await attachmentsValidator({
+      files,
+      maxAttachments: 2,
+      maxAttachmentSize: 1000,
+    });
+
+    expect(result.acceptedFiles).toHaveLength(2);
+    expect(result.rejectedFiles).toHaveLength(2);
+    expect(result.hasMaxAttachmentsError).toBeTruthy();
+    expect(result.hasMaxAttachmentSizeError).toBeFalsy();
+  });
+
+  it('should handle empty file list', async () => {
+    const files: File[] = [];
+    const result = await attachmentsValidator({
+      files,
+      maxAttachments: 3,
+      maxAttachmentSize: 1000,
+    });
+
+    expect(result.acceptedFiles).toHaveLength(0);
+    expect(result.rejectedFiles).toHaveLength(0);
+    expect(result.hasMaxAttachmentSizeError).toBeFalsy();
+    expect(result.hasMaxAttachmentsError).toBeUndefined();
+  });
+});

packages/react-ai/src/components/AIConversation/context/AttachmentContext.tsx

@@ -1,16 +1,36 @@
 import * as React from 'react';
+import { AIConversationInput } from '../types';
 
-export const AttachmentContext = React.createContext(false);
+export interface AttachmentContextProps
+  extends Pick<
+    AIConversationInput,
+    'allowAttachments' | 'maxAttachments' | 'maxAttachmentSize'
+  > {}
+
+export const AttachmentContext = React.createContext<
+  Required<AttachmentContextProps>
+>({
+  allowAttachments: false,
+  // We save attachments as base64 strings into dynamodb for conversation history
+  // DynamoDB has a max size of 400kb for records
+  // This can be overridden so cutsomers could provide a lower number
+  // or a higher number if in the future we support larger sizes.
+  maxAttachmentSize: 400_000,
+  maxAttachments: 20,
+});
 
 export const AttachmentProvider = ({
   children,
-  allowAttachments,
-}: {
-  children?: React.ReactNode;
-  allowAttachments?: boolean;
-}): JSX.Element => {
+  allowAttachments = false,
+  maxAttachmentSize = 400_000,
+  maxAttachments = 20,
+}: React.PropsWithChildren<AttachmentContextProps>): JSX.Element => {
+  const providerValue = React.useMemo(
+    () => ({ maxAttachmentSize, maxAttachments, allowAttachments }),
+    [maxAttachmentSize, maxAttachments, allowAttachments]
+  );
   return (
-    <AttachmentContext.Provider value={allowAttachments ?? false}>
+    <AttachmentContext.Provider value={providerValue}>
       {children}
     </AttachmentContext.Provider>
   );

packages/react-ai/src/components/AIConversation/context/ControlsContext.tsx

@@ -1,5 +1,5 @@
 import React from 'react';
-import { ConversationInputContext } from './ConversationInputContext';
+import { ConversationInputContextProps } from './ConversationInputContext';
 import { SuggestedPrompt } from '../types';
 import { ConversationMessage } from '../../../types';
 
@@ -9,12 +9,13 @@ export interface ControlsContextProps {
       handleSubmit: (e: React.FormEvent<HTMLFormElement>) => void;
       allowAttachments?: boolean;
       isLoading?: boolean;
-    } & Required<ConversationInputContext>
+      onValidate: (files: File[]) => Promise<void>;
+    } & ConversationInputContextProps
   >;
   MessageList?: React.ComponentType<{ messages: ConversationMessage[] }>;
   PromptList?: React.ComponentType<{
     suggestedPrompts?: SuggestedPrompt[];
-    setInput: ConversationInputContext['setInput'];
+    setInput: ConversationInputContextProps['setInput'];
   }>;
 }
 

packages/react-ai/src/components/AIConversation/context/ConversationInputContext.tsx

@@ -5,26 +5,29 @@ export interface ConversationInput {
   files?: File[];
 }
 
-export interface ConversationInputContext {
+export interface ConversationInputContextProps {
   input?: ConversationInput;
   setInput?: React.Dispatch<
     React.SetStateAction<ConversationInput | undefined>
   >;
+  error?: string;
+  setError?: React.Dispatch<React.SetStateAction<string | undefined>>;
 }
 
 export const ConversationInputContext =
-  React.createContext<ConversationInputContext>({});
+  React.createContext<ConversationInputContextProps>({});
 
 export const ConversationInputContextProvider = ({
   children,
 }: {
   children?: React.ReactNode;
 }): JSX.Element => {
   const [input, setInput] = React.useState<ConversationInput | undefined>();
+  const [error, setError] = React.useState<string>();
 
   const providerValue = React.useMemo(
-    () => ({ input, setInput }),
-    [input, setInput]
+    () => ({ input, setInput, error, setError }),
+    [input, setInput, error, setError]
   );
 
   return (

packages/react-ai/src/components/AIConversation/context/index.ts

@@ -2,6 +2,7 @@ export { AIContextContext, AIContextProvider } from './AIContextContext';
 export { ActionsContext, ActionsProvider } from './ActionsContext';
 export { AvatarsContext, AvatarsProvider } from './AvatarsContext';
 export {
+  ConversationInputContextProps,
   ConversationInputContext,
   ConversationInput,
   ConversationInputContextProvider,
@@ -40,7 +41,11 @@ export {
   MessageRendererContext,
   useMessageRenderer,
 } from './MessageRenderContext';
-export { AttachmentProvider, AttachmentContext } from './AttachmentContext';
+export {
+  AttachmentProvider,
+  AttachmentContext,
+  AttachmentContextProps,
+} from './AttachmentContext';
 export {
   WelcomeMessageContext,
   WelcomeMessageProvider,

packages/react-ai/src/components/AIConversation/displayText.ts

@@ -3,11 +3,21 @@ import { formatDate } from './utils';
 
 export type ConversationDisplayText = {
   getMessageTimestampText?: (date: Date) => string;
+  getMaxAttachmentErrorText?: (count: number) => string;
+  getAttachmentSizeErrorText?: (sizeText: string) => string;
 };
 
 export const defaultAIConversationDisplayTextEn: Required<AIConversationDisplayText> =
   {
     getMessageTimestampText: (date: Date) => formatDate(date),
+    getMaxAttachmentErrorText(count: number): string {
+      return `Cannot choose more than ${count} ${
+        count === 1 ? 'file' : 'files'
+      }. `;
+    },
+    getAttachmentSizeErrorText(sizeText: string): string {
+      return `File size must be below ${sizeText}.`;
+    },
   };
 
 export type AIConversationDisplayText =

packages/react-ai/src/components/AIConversation/types.ts

@@ -37,6 +37,8 @@ export interface AIConversationInput {
   variant?: MessageVariant;
   controls?: ControlsContextProps;
   allowAttachments?: boolean;
+  maxAttachments?: number;
+  maxAttachmentSize?: number;
   messageRenderer?: MessageRenderer;
 }