File size: 3,036 Bytes
867b17d |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 |
import type {
CoreAssistantMessage,
CoreToolMessage,
UIMessage,
UIMessagePart,
} from 'ai';
import { type ClassValue, clsx } from 'clsx';
import { twMerge } from 'tailwind-merge';
import type { DBMessage, Document } from '@/lib/db/schema';
import { ChatSDKError, type ErrorCode } from './errors';
import type { ChatMessage, ChatTools, CustomUIDataTypes } from './types';
import { formatISO } from 'date-fns';
export function cn(...inputs: ClassValue[]) {
return twMerge(clsx(inputs));
}
export const fetcher = async (url: string) => {
const response = await fetch(url);
if (!response.ok) {
const { code, cause } = await response.json();
throw new ChatSDKError(code as ErrorCode, cause);
}
return response.json();
};
export async function fetchWithErrorHandlers(
input: RequestInfo | URL,
init?: RequestInit,
) {
try {
const response = await fetch(input, init);
if (!response.ok) {
const { code, cause } = await response.json();
throw new ChatSDKError(code as ErrorCode, cause);
}
return response;
} catch (error: unknown) {
if (typeof navigator !== 'undefined' && !navigator.onLine) {
throw new ChatSDKError('offline:chat');
}
throw error;
}
}
export function getLocalStorage(key: string) {
if (typeof window !== 'undefined') {
return JSON.parse(localStorage.getItem(key) || '[]');
}
return [];
}
export function generateUUID(): string {
return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, (c) => {
const r = (Math.random() * 16) | 0;
const v = c === 'x' ? r : (r & 0x3) | 0x8;
return v.toString(16);
});
}
type ResponseMessageWithoutId = CoreToolMessage | CoreAssistantMessage;
type ResponseMessage = ResponseMessageWithoutId & { id: string };
export function getMostRecentUserMessage(messages: Array<UIMessage>) {
const userMessages = messages.filter((message) => message.role === 'user');
return userMessages.at(-1);
}
export function getDocumentTimestampByIndex(
documents: Array<Document>,
index: number,
) {
if (!documents) return new Date();
if (index > documents.length) return new Date();
return documents[index].createdAt;
}
export function getTrailingMessageId({
messages,
}: {
messages: Array<ResponseMessage>;
}): string | null {
const trailingMessage = messages.at(-1);
if (!trailingMessage) return null;
return trailingMessage.id;
}
export function sanitizeText(text: string) {
return text.replace('<has_function_call>', '');
}
export function convertToUIMessages(messages: DBMessage[]): ChatMessage[] {
return messages.map((message) => ({
id: message.id,
role: message.role as 'user' | 'assistant' | 'system',
parts: message.parts as UIMessagePart<CustomUIDataTypes, ChatTools>[],
metadata: {
createdAt: formatISO(message.createdAt),
},
}));
}
export function getTextFromMessage(message: ChatMessage): string {
return message.parts
.filter((part) => part.type === 'text')
.map((part) => part.text)
.join('');
}
|