feat: implement bff layer
This commit is contained in:
gosangam
+34
-317
@@ -1,332 +1,49 @@
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/**
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* Data access layer for The Nectar of Devotion (NOD).
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*
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* Reads from MongoDB via Prisma, same as the rest of the app.
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* NoD is a prose book (like KB) but has no volume structure —
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* we use volume=0 as the sentinel for "no volumes".
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*
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* Collections used:
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* - book_meta (via Prisma BookMeta model)
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* - prose_chapters (via Prisma ProseChapter model)
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* Delegates to the generic book data layer which calls the BFF API.
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*/
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import { prisma } from "@/lib/db";
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import type { JsonValue } from "@prisma/client/runtime/library";
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import {
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getBookMeta,
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getIntroSegments,
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getIntroSegment,
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getChapter,
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getContent,
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getSidebarItems,
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type BookMeta,
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type IntroSegment,
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type Chapter,
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type SidebarItem,
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} from "@/lib/books";
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// ---------------------------------------------------------------------------
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// Constants
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// ---------------------------------------------------------------------------
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const CODE = "nod";
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/** Volume sentinel for books without volumes. */
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const NO_VOLUME = 0;
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export type NodMeta = BookMeta;
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export type NodChapterEntry = { number: number; title: string };
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export type NodIntroSegment = IntroSegment;
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export type NodChapter = Chapter;
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export type NodSidebarItem = SidebarItem;
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const BOOK = "nod";
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// ---------------------------------------------------------------------------
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// Types
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// ---------------------------------------------------------------------------
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export type NodMeta = {
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book: string;
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title: string;
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subtitle: string;
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author: string;
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year: number;
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description: string;
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totalChapters: number;
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parts: NodPart[];
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chapters: NodChapterEntry[];
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};
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export type NodPart = {
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number: number;
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title: string;
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chapters: number[];
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};
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export type NodChapterEntry = {
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number: number;
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title: string;
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};
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export type NodIntroSegment = {
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slug: string;
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title: string;
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type: string;
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book: string;
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order: number;
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paragraphs: string[];
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};
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export type NodChapter = {
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book: string;
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chapter: number | null;
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title: string;
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type: string;
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slug?: string;
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paragraphs: string[];
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};
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/** Union type used in sidebar / table-of-contents navigation. */
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export type NodSidebarItem = {
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/** URL-safe slug: "intro-front-flap", "1", "51", "concluding-words" */
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slug: string;
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/** Human-readable label for the sidebar */
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label: string;
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/** "intro-segment" | "chapter" | "conclusion" */
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type: string;
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/** Chapter number, or null for non-chapter items */
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chapter: number | null;
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};
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// ---------------------------------------------------------------------------
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// HTML sanitisation (mirrors lib/api.ts)
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// ---------------------------------------------------------------------------
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function sanitizeHtml(html: string): string {
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let clean = html.replace(/<script[\s>][\s\S]*?<\/script>/gi, "");
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clean = clean.replace(/<style[\s>][\s\S]*?<\/style>/gi, "");
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clean = clean.replace(/<iframe[\s>][\s\S]*?<\/iframe>/gi, "");
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clean = clean.replace(
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/<\/?(?:script|style|iframe|object|embed|form|input|textarea|select|button)[^>]*>/gi,
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"",
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);
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clean = clean.replace(/\s+on\w+\s*=\s*(?:"[^"]*"|'[^']*'|[^\s>]+)/gi, "");
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clean = clean.replace(/href\s*=\s*"javascript:[^"]*"/gi, 'href=""');
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clean = clean.replace(/href\s*=\s*'javascript:[^']*'/gi, "href=''");
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return clean;
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export async function getNodMeta() {
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return getBookMeta(CODE);
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}
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/** Normalize paragraphs — handles both native arrays and stringified JSON. */
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function normalizeParagraphs(paragraphs: string[] | JsonValue): string[] {
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let result: string[];
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if (typeof paragraphs === "string") {
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try {
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const parsed = JSON.parse(paragraphs);
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result = Array.isArray(parsed) ? parsed : [paragraphs];
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} catch {
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result = [paragraphs];
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}
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} else if (Array.isArray(paragraphs)) {
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result = paragraphs as string[];
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} else {
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result = [];
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}
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return result.map(sanitizeHtml);
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export async function getNodIntroSegments() {
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return getIntroSegments(CODE);
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}
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// ---------------------------------------------------------------------------
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// Book meta
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// ---------------------------------------------------------------------------
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/**
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* Book-level metadata (title, author, parts, chapter list, etc.)
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*/
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export async function getNodMeta(): Promise<NodMeta | null> {
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const meta = await prisma.bookMeta.findUnique({ where: { book: BOOK } });
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if (!meta) return null;
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return meta.data as unknown as NodMeta;
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export async function getNodIntroSegment(slug: string) {
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return getIntroSegment(CODE, slug);
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}
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// ---------------------------------------------------------------------------
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// Intro segments
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// ---------------------------------------------------------------------------
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/**
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* All intro segments, ordered by their `order` field.
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*/
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export async function getNodIntroSegments(): Promise<NodIntroSegment[]> {
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const results = await prisma.proseChapter.findMany({
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where: { book: BOOK, volume: NO_VOLUME, type: "intro-segment" },
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orderBy: { order: "asc" },
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});
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return results.map((doc) => ({
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slug: doc.slug,
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title: doc.title,
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type: doc.type,
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book: doc.book,
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order: doc.order,
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paragraphs: normalizeParagraphs(doc.paragraphs),
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}));
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export async function getNodChapter(chapterNum: number) {
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return getChapter(CODE, String(chapterNum));
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}
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/**
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* A single intro segment by slug.
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* Accepts both "intro-preface" (URL slug) and "preface" (raw slug).
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*/
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export async function getNodIntroSegment(
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slug: string,
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): Promise<NodIntroSegment | null> {
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// DB stores with "intro-" prefix; accept either form
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const dbSlug = slug.startsWith("intro-") ? slug : `intro-${slug}`;
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const doc = await prisma.proseChapter.findUnique({
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where: {
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book_volume_slug: { book: BOOK, volume: NO_VOLUME, slug: dbSlug },
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},
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});
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if (!doc) return null;
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return {
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slug: doc.slug,
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title: doc.title,
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type: doc.type,
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book: doc.book,
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order: doc.order,
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paragraphs: normalizeParagraphs(doc.paragraphs),
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};
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// NodConcludingWords is just a chapter with slug "concluding-words"
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export async function getNodConcludingWords() {
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return getChapter(CODE, "concluding-words");
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}
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// ---------------------------------------------------------------------------
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// Chapters
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// ---------------------------------------------------------------------------
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/**
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* A numbered chapter (1–51).
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*/
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export async function getNodChapter(
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chapterNum: number,
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): Promise<NodChapter | null> {
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if (chapterNum < 1 || chapterNum > 51 || !Number.isInteger(chapterNum)) {
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return null;
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}
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const doc = await prisma.proseChapter.findUnique({
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where: {
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book_volume_slug: {
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book: BOOK,
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volume: NO_VOLUME,
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slug: String(chapterNum),
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},
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},
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});
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if (!doc) return null;
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return {
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book: doc.book,
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chapter: doc.chapter,
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title: doc.title,
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type: doc.type,
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slug: doc.slug,
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paragraphs: normalizeParagraphs(doc.paragraphs),
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};
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export async function getNodContent(slug: string) {
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return getContent(CODE, slug);
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}
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/**
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* The concluding words section.
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*/
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export async function getNodConcludingWords(): Promise<NodChapter | null> {
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const doc = await prisma.proseChapter.findUnique({
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where: {
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book_volume_slug: {
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book: BOOK,
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volume: NO_VOLUME,
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slug: "concluding-words",
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},
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},
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});
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if (!doc) return null;
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return {
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book: doc.book,
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chapter: doc.chapter,
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title: doc.title,
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type: doc.type,
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slug: doc.slug,
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paragraphs: normalizeParagraphs(doc.paragraphs),
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};
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}
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// ---------------------------------------------------------------------------
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// Unified content accessor
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// ---------------------------------------------------------------------------
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/**
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* Get content by URL slug.
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*
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* "intro-front-flap" → intro segment
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* "intro-preface" → intro segment
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* "intro-introduction" → intro segment
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* "1" … "51" → chapter
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* "concluding-words" → concluding section
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*/
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export async function getNodContent(
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slug: string,
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): Promise<NodChapter | NodIntroSegment | null> {
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if (slug.startsWith("intro-")) {
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return getNodIntroSegment(slug);
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}
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if (slug === "concluding-words") {
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return getNodConcludingWords();
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}
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const num = Number(slug);
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if (!Number.isNaN(num) && Number.isInteger(num) && num >= 1 && num <= 51) {
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return getNodChapter(num);
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}
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return null;
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}
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// ---------------------------------------------------------------------------
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// Sidebar navigation
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// ---------------------------------------------------------------------------
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/**
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* Build the full sidebar navigation list.
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*
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* Order: intro segments → chapters 1–51 → concluding words
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*/
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export async function getNodSidebarItems(): Promise<NodSidebarItem[]> {
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const [meta, allDocs] = await Promise.all([
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getNodMeta(),
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prisma.proseChapter.findMany({
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where: { book: BOOK, volume: NO_VOLUME },
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orderBy: { order: "asc" },
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select: { slug: true, title: true, type: true, chapter: true },
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}),
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]);
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if (!meta) return [];
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const items: NodSidebarItem[] = [];
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// Intro segments (from DB, in order)
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for (const doc of allDocs) {
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if (doc.type === "intro-segment") {
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items.push({
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slug: doc.slug,
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label: doc.title,
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type: "intro-segment",
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chapter: null,
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});
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}
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}
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// Chapters 1–51 (use meta.chapters for consistent title/ordering)
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for (const ch of meta.chapters) {
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items.push({
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slug: String(ch.number),
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label: `Chapter ${ch.number}: ${ch.title}`,
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type: "chapter",
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chapter: ch.number,
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});
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}
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// Concluding words
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const cw = allDocs.find((d) => d.type === "conclusion");
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if (cw) {
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items.push({
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slug: cw.slug,
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label: cw.title,
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type: "conclusion",
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chapter: null,
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});
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}
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return items;
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export async function getNodSidebarItems() {
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return getSidebarItems(CODE);
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}
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