Citation

1"use client";
2 
3import * as React from "react";
4import type { LucideIcon } from "lucide-react";
5import {
6  FileText,
7  Globe,
8  Code2,
9  Newspaper,
10  Database,
11  File,
12  ExternalLink,
13} from "lucide-react";
14import { cn, Popover, PopoverContent, PopoverTrigger } from "./_adapter";
15 
16import { openSafeNavigationHref, sanitizeHref } from "../shared/media";
17import type {
18  SerializableCitation,
19  CitationType,
20  CitationVariant,
21} from "./schema";
22 
23const FALLBACK_LOCALE = "en-US";
24 
25const TYPE_ICONS: Record<CitationType, LucideIcon> = {
26  webpage: Globe,
27  document: FileText,
28  article: Newspaper,
29  api: Database,
30  code: Code2,
31  other: File,
32};
33 
34function extractDomain(url: string): string | undefined {
35  try {
36    const urlObj = new URL(url);
37    return urlObj.hostname.replace(/^www\./, "");
38  } catch {
39    return undefined;
40  }
41}
42 
43function formatDate(isoString: string, locale: string): string {
44  try {
45    const date = new Date(isoString);
46    return date.toLocaleDateString(locale, {
47      year: "numeric",
48      month: "short",
49    });
50  } catch {
51    return isoString;
52  }
53}
54 
55function useHoverPopover(delay = 100) {
56  const [open, setOpen] = React.useState(false);
57  const timeoutRef = React.useRef<ReturnType<typeof setTimeout> | null>(null);
58 
59  const handleMouseEnter = React.useCallback(() => {
60    if (timeoutRef.current) clearTimeout(timeoutRef.current);
61    timeoutRef.current = setTimeout(() => setOpen(true), delay);
62  }, [delay]);
63 
64  const handleMouseLeave = React.useCallback(() => {
65    if (timeoutRef.current) clearTimeout(timeoutRef.current);
66    timeoutRef.current = setTimeout(() => setOpen(false), delay);
67  }, [delay]);
68 
69  React.useEffect(() => {
70    return () => {
71      if (timeoutRef.current) clearTimeout(timeoutRef.current);
72    };
73  }, []);
74 
75  return { open, setOpen, handleMouseEnter, handleMouseLeave };
76}
77 
78export interface CitationProps extends SerializableCitation {
79  variant?: CitationVariant;
80  className?: string;
81  onNavigate?: (href: string, citation: SerializableCitation) => void;
82}
83 
84export function Citation(props: CitationProps) {
85  const { variant = "default", className, onNavigate, ...serializable } = props;
86 
87  const {
88    id,
89    href: rawHref,
90    title,
91    snippet,
92    domain: providedDomain,
93    favicon,
94    author,
95    publishedAt,
96    type = "webpage",
97    locale: providedLocale,
98  } = serializable;
99 
100  const locale = providedLocale ?? FALLBACK_LOCALE;
101  const sanitizedHref = sanitizeHref(rawHref);
102// … truncated