430 lines
12 KiB
TypeScript
430 lines
12 KiB
TypeScript
/**
|
||
* Data access layer for Light of the Bhāgavata (LoB).
|
||
*
|
||
* Reads from MongoDB via Prisma, same as the rest of the app.
|
||
* LoB is a prose book with no volume structure —
|
||
* we use volume=0 as the sentinel for "no volumes".
|
||
*
|
||
* It has 48 "texts" (numbered chapters) plus 4 intro segments
|
||
* (front-pages, preface, acknowledgement, the-artist).
|
||
*
|
||
* When the DB isn't seeded yet, falls back to reading local JSON files
|
||
* from lib/jsons/books/lob/.
|
||
*
|
||
* Collections used:
|
||
* - book_meta (via Prisma BookMeta model)
|
||
* - prose_chapters (via Prisma ProseChapter model)
|
||
*/
|
||
|
||
import { prisma } from "@/lib/db";
|
||
import type { JsonValue } from "@prisma/client/runtime/library";
|
||
import fs from "fs";
|
||
import path from "path";
|
||
|
||
// ---------------------------------------------------------------------------
|
||
// Constants
|
||
// ---------------------------------------------------------------------------
|
||
|
||
/** Volume sentinel for books without volumes. */
|
||
const NO_VOLUME = 0;
|
||
|
||
const BOOK = "lob";
|
||
|
||
const LOB_JSON_DIR = path.join(process.cwd(), "lib", "jsons", "books", "lob");
|
||
|
||
// ---------------------------------------------------------------------------
|
||
// Types
|
||
// ---------------------------------------------------------------------------
|
||
|
||
export type LobMeta = {
|
||
book: string;
|
||
title: string;
|
||
author: string;
|
||
year?: number;
|
||
description: string;
|
||
totalChapters: number;
|
||
chapters: LobChapterEntry[];
|
||
};
|
||
|
||
export type LobChapterEntry = {
|
||
number: number;
|
||
title: string;
|
||
};
|
||
|
||
export type LobIntroSegment = {
|
||
slug: string;
|
||
title: string;
|
||
type: string;
|
||
book: string;
|
||
order: number;
|
||
paragraphs: string[];
|
||
};
|
||
|
||
export type LobChapter = {
|
||
book: string;
|
||
chapter: number | null;
|
||
title: string;
|
||
type: string;
|
||
slug?: string;
|
||
paragraphs: string[];
|
||
};
|
||
|
||
/** Union type used in sidebar / table-of-contents navigation. */
|
||
export type LobSidebarItem = {
|
||
/** URL-safe slug: "intro-front-pages", "1", "48", etc. */
|
||
slug: string;
|
||
/** Human-readable label for the sidebar */
|
||
label: string;
|
||
/** "intro-segment" | "chapter" */
|
||
type: string;
|
||
/** Chapter number, or null for non-chapter items */
|
||
chapter: number | null;
|
||
};
|
||
|
||
// ---------------------------------------------------------------------------
|
||
// HTML sanitisation (mirrors lib/api.ts)
|
||
// ---------------------------------------------------------------------------
|
||
|
||
function sanitizeHtml(html: string): string {
|
||
let clean = html.replace(/<script[\s>][\s\S]*?<\/script>/gi, "");
|
||
clean = clean.replace(/<style[\s>][\s\S]*?<\/style>/gi, "");
|
||
clean = clean.replace(/<iframe[\s>][\s\S]*?<\/iframe>/gi, "");
|
||
clean = clean.replace(
|
||
/<\/?(?:script|style|iframe|object|embed|form|input|textarea|select|button)[^>]*>/gi,
|
||
"",
|
||
);
|
||
clean = clean.replace(/\s+on\w+\s*=\s*(?:"[^"]*"|'[^']*'|[^\s>]+)/gi, "");
|
||
clean = clean.replace(/href\s*=\s*"javascript:[^"]*"/gi, 'href=""');
|
||
clean = clean.replace(/href\s*=\s*'javascript:[^']*'/gi, "href=''");
|
||
return clean;
|
||
}
|
||
|
||
/** Normalize paragraphs — handles both native arrays and stringified JSON. */
|
||
function normalizeParagraphs(paragraphs: string[] | JsonValue): string[] {
|
||
let result: string[];
|
||
|
||
if (typeof paragraphs === "string") {
|
||
try {
|
||
const parsed = JSON.parse(paragraphs);
|
||
result = Array.isArray(parsed) ? parsed : [paragraphs];
|
||
} catch {
|
||
result = [paragraphs];
|
||
}
|
||
} else if (Array.isArray(paragraphs)) {
|
||
result = paragraphs as string[];
|
||
} else {
|
||
result = [];
|
||
}
|
||
|
||
return result.map(sanitizeHtml);
|
||
}
|
||
|
||
// ---------------------------------------------------------------------------
|
||
// Local JSON helpers (fallback when DB is not seeded)
|
||
// ---------------------------------------------------------------------------
|
||
|
||
function readLocalJson<T>(filePath: string): T | null {
|
||
if (!fs.existsSync(filePath)) return null;
|
||
try {
|
||
return JSON.parse(fs.readFileSync(filePath, "utf-8")) as T;
|
||
} catch {
|
||
return null;
|
||
}
|
||
}
|
||
|
||
function getLocalIntroSegments(): LobIntroSegment[] {
|
||
const introDir = path.join(LOB_JSON_DIR, "intro");
|
||
if (!fs.existsSync(introDir)) return [];
|
||
|
||
const results: LobIntroSegment[] = [];
|
||
const files = [
|
||
"front-pages.json",
|
||
"preface.json",
|
||
"acknowledgement.json",
|
||
"the-artist.json",
|
||
];
|
||
for (const file of files) {
|
||
const filePath = path.join(introDir, file);
|
||
const seg = readLocalJson<LobIntroSegment>(filePath);
|
||
if (seg) results.push(seg);
|
||
}
|
||
return results.sort((a, b) => (a.order ?? 0) - (b.order ?? 0));
|
||
}
|
||
|
||
function getLocalIntroSegment(rawSlug: string): LobIntroSegment | null {
|
||
const filePath = path.join(LOB_JSON_DIR, "intro", `${rawSlug}.json`);
|
||
return readLocalJson<LobIntroSegment>(filePath);
|
||
}
|
||
|
||
function getLocalChapter(chapterNum: number): LobChapter | null {
|
||
const filePath = path.join(
|
||
LOB_JSON_DIR,
|
||
"chapters",
|
||
String(chapterNum).padStart(2, "0") + ".json",
|
||
);
|
||
return readLocalJson<LobChapter>(filePath);
|
||
}
|
||
|
||
// ---------------------------------------------------------------------------
|
||
// Book meta
|
||
// ---------------------------------------------------------------------------
|
||
|
||
/**
|
||
* Book-level metadata (title, author, chapter list, etc.)
|
||
*/
|
||
export async function getLobMeta(): Promise<LobMeta | null> {
|
||
const meta = await prisma.bookMeta.findUnique({ where: { book: BOOK } });
|
||
if (meta) return meta.data as unknown as LobMeta;
|
||
|
||
// Fallback to local JSON
|
||
const introPath = path.join(LOB_JSON_DIR, "intro.json");
|
||
return readLocalJson<LobMeta>(introPath);
|
||
}
|
||
|
||
// ---------------------------------------------------------------------------
|
||
// Intro segments
|
||
// ---------------------------------------------------------------------------
|
||
|
||
/**
|
||
* All intro segments, ordered by their `order` field.
|
||
*/
|
||
export async function getLobIntroSegments(): Promise<LobIntroSegment[]> {
|
||
const results = await prisma.proseChapter.findMany({
|
||
where: { book: BOOK, volume: NO_VOLUME, type: "intro-segment" },
|
||
orderBy: { order: "asc" },
|
||
});
|
||
|
||
if (results.length > 0) {
|
||
return results.map((doc) => ({
|
||
slug: doc.slug,
|
||
title: doc.title,
|
||
type: doc.type,
|
||
book: doc.book,
|
||
order: doc.order,
|
||
paragraphs: normalizeParagraphs(doc.paragraphs),
|
||
}));
|
||
}
|
||
|
||
// Fallback to local JSON
|
||
return getLocalIntroSegments();
|
||
}
|
||
|
||
/**
|
||
* A single intro segment by slug.
|
||
* Accepts both "intro-front-pages" (URL slug) and "front-pages" (raw slug).
|
||
*/
|
||
export async function getLobIntroSegment(
|
||
slug: string,
|
||
): Promise<LobIntroSegment | null> {
|
||
// DB stores with "intro-" prefix; accept either form
|
||
const dbSlug = slug.startsWith("intro-") ? slug : `intro-${slug}`;
|
||
const rawSlug = slug.startsWith("intro-") ? slug.replace(/^intro-/, "") : slug;
|
||
|
||
const doc = await prisma.proseChapter.findUnique({
|
||
where: {
|
||
book_volume_slug: { book: BOOK, volume: NO_VOLUME, slug: dbSlug },
|
||
},
|
||
});
|
||
|
||
if (doc) {
|
||
return {
|
||
slug: doc.slug,
|
||
title: doc.title,
|
||
type: doc.type,
|
||
book: doc.book,
|
||
order: doc.order,
|
||
paragraphs: normalizeParagraphs(doc.paragraphs),
|
||
};
|
||
}
|
||
|
||
// Fallback to local JSON
|
||
const local = getLocalIntroSegment(rawSlug);
|
||
if (!local) return null;
|
||
return {
|
||
...local,
|
||
slug: dbSlug,
|
||
paragraphs: local.paragraphs.map(sanitizeHtml),
|
||
};
|
||
}
|
||
|
||
// ---------------------------------------------------------------------------
|
||
// Chapters (Texts 1–48)
|
||
// ---------------------------------------------------------------------------
|
||
|
||
/**
|
||
* A numbered text/chapter (1–48).
|
||
*/
|
||
export async function getLobChapter(
|
||
chapterNum: number,
|
||
): Promise<LobChapter | null> {
|
||
if (chapterNum < 1 || chapterNum > 48 || !Number.isInteger(chapterNum)) {
|
||
return null;
|
||
}
|
||
|
||
const doc = await prisma.proseChapter.findUnique({
|
||
where: {
|
||
book_volume_slug: {
|
||
book: BOOK,
|
||
volume: NO_VOLUME,
|
||
slug: String(chapterNum),
|
||
},
|
||
},
|
||
});
|
||
|
||
if (doc) {
|
||
return {
|
||
book: doc.book,
|
||
chapter: doc.chapter,
|
||
title: doc.title,
|
||
type: doc.type,
|
||
slug: doc.slug,
|
||
paragraphs: normalizeParagraphs(doc.paragraphs),
|
||
};
|
||
}
|
||
|
||
// Fallback to local JSON
|
||
const local = getLocalChapter(chapterNum);
|
||
if (!local) return null;
|
||
return {
|
||
...local,
|
||
paragraphs: local.paragraphs.map(sanitizeHtml),
|
||
};
|
||
}
|
||
|
||
// ---------------------------------------------------------------------------
|
||
// Unified content accessor
|
||
// ---------------------------------------------------------------------------
|
||
|
||
/**
|
||
* Get content by URL slug.
|
||
*
|
||
* "intro-front-pages" → intro segment
|
||
* "intro-preface" → intro segment
|
||
* "intro-acknowledgement" → intro segment
|
||
* "intro-the-artist" → intro segment
|
||
* "1" … "48" → chapter (text)
|
||
*/
|
||
export async function getLobContent(
|
||
slug: string,
|
||
): Promise<LobChapter | LobIntroSegment | null> {
|
||
if (slug.startsWith("intro-")) {
|
||
return getLobIntroSegment(slug);
|
||
}
|
||
|
||
const num = Number(slug);
|
||
if (!Number.isNaN(num) && Number.isInteger(num) && num >= 1 && num <= 48) {
|
||
return getLobChapter(num);
|
||
}
|
||
|
||
return null;
|
||
}
|
||
|
||
// ---------------------------------------------------------------------------
|
||
// Sidebar navigation
|
||
// ---------------------------------------------------------------------------
|
||
|
||
/**
|
||
* Build the full sidebar navigation list.
|
||
*
|
||
* Order: front-pages → preface → acknowledgement → the-artist → texts 1–48
|
||
*/
|
||
export async function getLobSidebarItems(): Promise<LobSidebarItem[]> {
|
||
const [meta, allDocs] = await Promise.all([
|
||
getLobMeta(),
|
||
prisma.proseChapter.findMany({
|
||
where: { book: BOOK, volume: NO_VOLUME },
|
||
orderBy: { order: "asc" },
|
||
select: { slug: true, title: true, type: true, chapter: true, order: true },
|
||
}),
|
||
]);
|
||
|
||
// If we got DB results, build from those
|
||
if (meta && allDocs.length > 0) {
|
||
return buildSidebarFromDocs(meta, allDocs);
|
||
}
|
||
|
||
// Fallback: build from local JSON
|
||
return buildSidebarFromLocal(meta);
|
||
}
|
||
|
||
function buildSidebarFromDocs(
|
||
meta: LobMeta,
|
||
allDocs: { slug: string; title: string; type: string; chapter: number | null; order: number | null }[],
|
||
): LobSidebarItem[] {
|
||
const items: LobSidebarItem[] = [];
|
||
|
||
// Intro segments (all come before chapters; LoB has no back matter)
|
||
for (const doc of allDocs) {
|
||
if (doc.type === "intro-segment") {
|
||
items.push({
|
||
slug: doc.slug,
|
||
label: doc.title,
|
||
type: "intro-segment",
|
||
chapter: null,
|
||
});
|
||
}
|
||
}
|
||
|
||
// Texts 1–48 (use meta.chapters for consistent title/ordering)
|
||
for (const ch of meta.chapters) {
|
||
items.push({
|
||
slug: String(ch.number),
|
||
label: `Text ${ch.number}: ${ch.title}`,
|
||
type: "chapter",
|
||
chapter: ch.number,
|
||
});
|
||
}
|
||
|
||
return items;
|
||
}
|
||
|
||
function buildSidebarFromLocal(meta: LobMeta | null): LobSidebarItem[] {
|
||
const items: LobSidebarItem[] = [];
|
||
|
||
// Local intro segments (front matter only — LoB has no back matter)
|
||
const introSegs = getLocalIntroSegments();
|
||
for (const seg of introSegs) {
|
||
items.push({
|
||
slug: `intro-${seg.slug}`,
|
||
label: seg.title,
|
||
type: "intro-segment",
|
||
chapter: null,
|
||
});
|
||
}
|
||
|
||
// Texts from meta or generate default 1-48
|
||
if (meta && meta.chapters) {
|
||
for (const ch of meta.chapters) {
|
||
items.push({
|
||
slug: String(ch.number),
|
||
label: `Text ${ch.number}: ${ch.title}`,
|
||
type: "chapter",
|
||
chapter: ch.number,
|
||
});
|
||
}
|
||
} else {
|
||
// Fallback: scan local chapter JSONs
|
||
const chaptersDir = path.join(LOB_JSON_DIR, "chapters");
|
||
if (fs.existsSync(chaptersDir)) {
|
||
const files = fs
|
||
.readdirSync(chaptersDir)
|
||
.filter((f) => f.endsWith(".json"))
|
||
.sort();
|
||
for (const file of files) {
|
||
const ch = readLocalJson<LobChapter>(path.join(chaptersDir, file));
|
||
if (ch) {
|
||
const num = ch.chapter ?? parseInt(file.replace(".json", ""), 10);
|
||
items.push({
|
||
slug: String(num),
|
||
label: `Text ${num}: ${ch.title}`,
|
||
type: "chapter",
|
||
chapter: num,
|
||
});
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
return items;
|
||
}
|