75 lines
1.8 KiB
TypeScript
75 lines
1.8 KiB
TypeScript
import type { CoreAssistantMessage, CoreToolMessage, UIMessage } from 'ai';
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import { type ClassValue, clsx } from 'clsx';
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import { twMerge } from 'tailwind-merge';
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import type { Document } from '@/lib/db/schema';
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export function cn(...inputs: ClassValue[]) {
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return twMerge(clsx(inputs));
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}
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interface ApplicationError extends Error {
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info: string;
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status: number;
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}
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export const fetcher = async (url: string) => {
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const res = await fetch(url);
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if (!res.ok) {
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const error = new Error(
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'An error occurred while fetching the data.',
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) as ApplicationError;
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error.info = await res.json();
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error.status = res.status;
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throw error;
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}
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return res.json();
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};
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export function getLocalStorage(key: string) {
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if (typeof window !== 'undefined') {
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return JSON.parse(localStorage.getItem(key) || '[]');
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}
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return [];
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}
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export function generateUUID(): string {
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return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, (c) => {
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const r = (Math.random() * 16) | 0;
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const v = c === 'x' ? r : (r & 0x3) | 0x8;
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return v.toString(16);
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});
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}
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type ResponseMessageWithoutId = CoreToolMessage | CoreAssistantMessage;
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type ResponseMessage = ResponseMessageWithoutId & { id: string };
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export function getMostRecentUserMessage(messages: Array<UIMessage>) {
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const userMessages = messages.filter((message) => message.role === 'user');
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return userMessages.at(-1);
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}
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export function getDocumentTimestampByIndex(
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documents: Array<Document>,
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index: number,
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) {
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if (!documents) return new Date();
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if (index > documents.length) return new Date();
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return documents[index].createdAt;
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}
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export function getTrailingMessageId({
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messages,
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}: {
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messages: Array<ResponseMessage>;
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}): string | null {
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const trailingMessage = messages.at(-1);
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if (!trailingMessage) return null;
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return trailingMessage.id;
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}
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