295 lines
8.8 KiB
TypeScript
295 lines
8.8 KiB
TypeScript
export const dynamic = "force-dynamic";
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import type { Metadata } from "next";
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import Link from "next/link";
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import { notFound } from "next/navigation";
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import { getProseChapter, getProseChapters } from "@/lib/api";
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import { ogForChapter, extractQuoteFromHl, buildOgMeta } from "@/lib/og";
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import { BOOK_NAMES } from "@/lib/constants";
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import { PageHeader } from "@/components/layout/page-header";
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import { JsonLd } from "@/components/seo/json-ld";
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import { articleJsonLd } from "@/lib/jsonld";
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import { Card, CardContent } from "@/components/ui/card";
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import { buttonVariants } from "@/components/ui/button";
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import { ChevronLeft, ChevronRight } from "lucide-react";
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import { cn } from "@/lib/utils";
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import { MobileNav, type MobileNavGroup } from "@/components/layout/mobile-nav";
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import { FindInPage } from "@/components/layout/find-in-page";
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export async function generateMetadata({
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params,
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searchParams,
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}: {
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params: Promise<{ volume: string; slug: string }>;
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searchParams: Promise<Record<string, string | string[] | undefined>>;
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}): Promise<Metadata> {
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const { volume, slug } = await params;
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const sp = await searchParams;
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const vol = parseInt(volume);
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const chapter = !isNaN(vol) ? await getProseChapter("kb", vol, slug) : null;
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const hlQuote = extractQuoteFromHl(sp, chapter?.paragraphs);
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if (hlQuote) {
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return buildOgMeta({
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title: BOOK_NAMES["kb"],
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detail: chapter ? `Volume ${vol} — ${chapter.title}` : `Volume ${vol}`,
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quote: hlQuote,
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});
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}
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return ogForChapter(
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"kb",
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chapter ? `Volume ${vol} — ${chapter.title}` : `Volume ${vol}`,
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);
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}
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export default async function KbChapterPage({
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params,
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}: {
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params: Promise<{ volume: string; slug: string }>;
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}) {
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const { volume, slug } = await params;
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const vol = parseInt(volume);
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if (isNaN(vol) || vol < 1 || vol > 2) notFound();
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const chapter = await getProseChapter("kb", vol, slug);
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if (!chapter) notFound();
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// Fetch all chapters/segments in this volume for sidebar + prev/next
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const allChapters = await getProseChapters("kb", vol);
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const currentIdx = allChapters.findIndex((ch) => ch.slug === slug);
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const prev = currentIdx > 0 ? allChapters[currentIdx - 1] : null;
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const next =
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currentIdx < allChapters.length - 1 ? allChapters[currentIdx + 1] : null;
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const chapterLabel =
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chapter.type === "chapter" && chapter.chapter != null
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? `Chapter ${chapter.chapter}`
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: null;
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return (
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<div className="min-h-screen bg-background">
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<JsonLd data={articleJsonLd({ path: `/books/kb/${vol}/${slug}`, headline: chapter.title, description: chapter.paragraphs?.[0], isPartOf: "Kṛṣṇa, The Supreme Personality of Godhead" })} />
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<PageHeader sticky>
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<Link
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href={`/books/kb/${vol}`}
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className="text-sm text-muted-foreground hover:text-foreground transition-colors"
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>
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← Volume {vol}
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</Link>
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<div className="mt-3 flex items-start justify-between gap-3">
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<h1 className="text-2xl font-bold text-foreground">
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{chapterLabel && (
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<span className="text-primary">{chapterLabel}: </span>
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)}
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{chapter.title}
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</h1>
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<FindInPage targetId="book-content" className="shrink-0 mt-0.5" />
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</div>
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</PageHeader>
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<div className="max-w-5xl mx-auto flex">
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{/* Left sidebar — chapter index */}
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<ChapterSidebar
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chapters={allChapters}
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currentSlug={slug}
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volume={vol}
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/>
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{/* Main content */}
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<main className="flex-1 min-w-0 px-6 py-8 space-y-8">
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{/* Top navigation */}
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<ChapterNav
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prev={prev}
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next={next}
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volume={vol}
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chapters={allChapters}
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currentSlug={slug}
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/>
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{/* Chapter content */}
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<Card id="book-content">
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<CardContent className="py-8 px-6 sm:px-8">
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<div className="space-y-4">
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{chapter.paragraphs.map((paragraph, i) => (
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<div
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key={i}
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className="text-base text-foreground leading-relaxed"
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dangerouslySetInnerHTML={{ __html: paragraph }}
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/>
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))}
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</div>
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</CardContent>
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</Card>
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{/* Bottom navigation */}
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<ChapterNav
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prev={prev}
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next={next}
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volume={vol}
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chapters={allChapters}
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currentSlug={slug}
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/>
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</main>
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</div>
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</div>
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);
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}
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// ---------------------------------------------------------------------------
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// Sidebar — chapter index
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// ---------------------------------------------------------------------------
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type SidebarChapter = {
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slug: string;
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title: string;
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type: string;
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chapter: number | null;
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};
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function ChapterSidebar({
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chapters,
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currentSlug,
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volume,
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}: {
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chapters: SidebarChapter[];
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currentSlug: string;
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volume: number;
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}) {
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return (
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<aside className="hidden lg:block w-56 shrink-0 sticky top-[89px] self-start max-h-[calc(100vh-89px)] overflow-y-auto py-8 pr-4">
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<h2 className="text-xs font-bold uppercase tracking-wider text-muted-foreground mb-3 px-2">
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Chapters
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</h2>
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<nav className="flex flex-col gap-0.5">
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{chapters.map((ch) => {
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const isActive = ch.slug === currentSlug;
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const label =
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ch.type === "chapter" && ch.chapter != null
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? `${ch.chapter}. ${ch.title}`
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: ch.title;
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return (
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<Link
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key={ch.slug}
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href={`/books/kb/${volume}/${ch.slug}`}
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className={cn(
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"px-2 py-1.5 rounded-md text-sm transition-colors truncate",
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isActive
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? "bg-primary/10 text-primary font-medium"
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: "text-muted-foreground hover:bg-muted hover:text-foreground",
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)}
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title={label}
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>
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{label}
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</Link>
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);
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})}
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</nav>
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</aside>
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);
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}
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// ---------------------------------------------------------------------------
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// Prev / Next navigation
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// ---------------------------------------------------------------------------
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type NavChapter = {
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slug: string;
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title: string;
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type: string;
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chapter: number | null;
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};
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function ChapterNav({
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prev,
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next,
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volume,
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chapters,
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currentSlug,
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}: {
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prev: NavChapter | null;
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next: NavChapter | null;
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volume: number;
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chapters: SidebarChapter[];
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currentSlug: string;
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}) {
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const mobileNavGroups: MobileNavGroup[] = [];
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const introItems = chapters.filter((i) => i.type !== "chapter");
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if (introItems.length > 0) {
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mobileNavGroups.push({
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title: "Front Matter",
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items: introItems.map((i) => ({
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slug: i.slug,
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label: i.title,
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href: `/books/kb/${volume}/${i.slug}`,
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type: i.type,
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})),
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});
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}
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const chapterItems = chapters.filter((i) => i.type === "chapter");
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if (chapterItems.length > 0) {
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mobileNavGroups.push({
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title: "Chapters",
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items: chapterItems.map((i) => ({
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slug: i.slug,
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label: i.chapter != null ? `${i.chapter}. ${i.title}` : i.title,
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href: `/books/kb/${volume}/${i.slug}`,
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type: i.type,
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})),
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});
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}
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return (
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<div className="flex items-center justify-between gap-3">
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<div className="flex items-center gap-2">
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<MobileNav
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groups={mobileNavGroups}
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currentSlug={currentSlug}
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bookTitle={`Kṛṣṇa Book — Volume ${volume}`}
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/>
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{prev ? (
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<Link
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href={`/books/kb/${volume}/${prev.slug}`}
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className={cn(
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buttonVariants({ variant: "outline", size: "sm" }),
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"gap-1.5",
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)}
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>
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<ChevronLeft className="size-4" />
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<span className="hidden sm:inline truncate max-w-[180px]">
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{prev.type === "chapter" && prev.chapter != null
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? `Ch. ${prev.chapter}`
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: prev.title}
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</span>
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<span className="sm:hidden">Previous</span>
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</Link>
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) : (
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<div className="hidden lg:block" />
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)}
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</div>
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{next ? (
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<Link
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href={`/books/kb/${volume}/${next.slug}`}
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className={cn(
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buttonVariants({ variant: "outline", size: "sm" }),
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"gap-1.5",
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)}
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>
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<span className="hidden sm:inline truncate max-w-[180px]">
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{next.type === "chapter" && next.chapter != null
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? `Ch. ${next.chapter}`
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: next.title}
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</span>
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<span className="sm:hidden">Next</span>
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<ChevronRight className="size-4" />
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</Link>
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) : (
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<div />
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)}
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</div>
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);
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}
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