# Prabhupāda Says — Project Context

## What this project is

A Next.js app presenting the books, letters, essays, lectures, and teachings of His Divine Grace A.C. Bhaktivedanta Swami Prabhupāda in a modern, accessible, and searchable format with proper Unicode Sanskrit (IAST + Devanagari).

Content is sourced from the pre-1980s Vedabase, extracted and indexed into MongoDB, and served via a Next.js frontend. Extraction scripts and raw data live separately in the `extractor/` directory.

---

## Tech Stack

- **Next.js 16** with Turbopack, React 19, TypeScript
- **Tailwind CSS v4** with `@tailwindcss/postcss`
- **shadcn/ui** (base-nova style, lucide icons) — components: Button, Card, Badge, Tooltip, Input, Drawer
- **next-themes** for dark/light/system mode
- **vaul** for mobile drawer navigation
- **Prisma v6** with MongoDB (provider `prisma-client-js`)
- **MongoDB** native driver (`mongodb` package) for seeding (Prisma requires replica set for writes)
- **Python 3** with BeautifulSoup4 + `indic-transliteration` for HTML extraction scripts
- **Database**: MongoDB at `DATABASE_URL` env variable with `?authSource=admin`

---

## Project Structure

The project is split into two directories:

- **`knowledgebase/`** — Production Next.js app (~3.5MB excluding node_modules)
- **`extractor/`** — Extraction scripts, seed scripts, raw data, legacy fonts (~750MB)

```
knowledgebase/
├── app/
│   ├── page.tsx                → Landing page (Books, Essays, Magazines, Letters, Transcriptions, etc.)
│   ├── layout.tsx              → ThemeProvider + TooltipProvider + TextSelectionToolbar + TextHighlighter
│   ├── globals.css             → Vintage color palette + reading settings CSS
│   ├── about/page.tsx          → About page (mission, data source, roadmap)
│   ├── books/                  → 37 book routes (verse-based + prose)
│   │   ├── page.tsx            → Books index (searchable grid, diacritic-aware search)
│   │   ├── chapter-viewer.tsx  → Shared client component for verse-based books
│   │   ├── bg/, sb/, cc/, sb1962/, iso/, noi/, bs/, mm/, nbs/  → Verse-based books
│   │   ├── kb/, nod/, tlc/, ej/, ek/, mg/, bbd/, owk/, rv/    → Prose books
│   │   ├── poy/, pqpa/, ttp/, ochkm/, hkh/, lcl/, lob/        → More prose books
│   │   ├── ssr/, ds/           → Hierarchical prose books (sub-chapters)
│   │   └── sva/, gg/, mog/, cbhc/, bk/, pk/, va/              → Other books
│   ├── magazines/              → Magazine browsing (BTG 1944-1960, BTG 1966-1973)
│   ├── letters/
│   │   ├── page.tsx            → Letters index with 3-way nav (year/recipient/location)
│   │   ├── filter-year-browser.tsx → Shared component: sidebar years + month-grouped content
│   │   ├── [slug]/page.tsx     → Individual letter reader
│   │   ├── year/[year]/
│   │   │   ├── page.tsx        → Letters by year
│   │   │   └── year-month-browser.tsx → Sidebar months + letter list
│   │   ├── recipient/[name]/page.tsx → Letters by recipient (year sidebar + month groups)
│   │   └── location/[name]/page.tsx  → Letters by location (year sidebar + month groups)
│   ├── essays/                 → 23 essays across 6 groups
│   ├── journals/               → Jaladuta Diary, The Beginning
│   ├── other-documents/        → 12 miscellaneous documents
│   ├── glossary/
│   │   ├── page.tsx            → Redirects to /glossary/a
│   │   ├── glossary-client.tsx → Client component (sidebar terms, single entry view, prev/next nav)
│   │   └── [letter]/page.tsx   → Dynamic route per letter (A-Z)
│   ├── disciples/              → 4,747 initiated disciples directory
│   │   ├── page.tsx            → Disciples browser (letter nav, suffix filter, search, sort, pagination)
│   │   └── disciples-browser.tsx → Client component
│   ├── transcriptions/page.tsx → Coming Soon page
│   └── api/
│       ├── og/route.tsx        → Dynamic OG image generator (Noto Sans, Prabhupāda image)
│       ├── books/              → Book/verse API routes
│       └── glossary/route.ts   → Glossary API
├── components/
│   ├── ui/                     → shadcn components (button, card, badge, tooltip, input, drawer)
│   ├── selection-toolbar/      → Text selection toolbar sub-components
│   │   ├── shared.tsx          → KautilyaIcon, types, hooks (useMediaQuery, useCopyFeedback)
│   │   ├── floating-toolbar.tsx → Desktop floating pill / mobile bottom bar
│   │   ├── share-modal.tsx     → Share modal (desktop) / drawer (mobile)
│   │   ├── collections-drawer.tsx → Save to collection drawer
│   │   └── more-popover.tsx    → More options popover (desktop) / drawer (mobile)
│   ├── text-selection-toolbar.tsx → Main orchestrator (event listeners, state management)
│   ├── text-highlighter.tsx    → Processes incoming ?hl= URLs (scroll + highlight)
│   ├── page-header.tsx         → Shared header with ReadingSettings (max-w-5xl)
│   ├── reading-settings.tsx    → Theme/font/size/justify accessibility panel
│   ├── mobile-nav.tsx          → Left-slide drawer for mobile sidebar navigation
│   ├── site-footer.tsx         → Global footer (About + Home links)
│   ├── logo.tsx                → Theme-aware logo component
│   └── theme-provider.tsx      → next-themes wrapper
├── lib/
│   ├── db.ts                   → Prisma client singleton
│   ├── api.ts                  → Core data access (books, verses, prose chapters, glossary)
│   ├── constants.ts            → Shared constants (BOOK_NAMES, CC_LILAS)
│   ├── og.ts                   → OG image metadata builders (ogForVerse, ogForLetter, etc.)
│   ├── text-highlight.ts       → Text fragment encode/decode, highlight matching
│   ├── source-reference.ts     → Source reference from URL (for copy attribution)
│   ├── disciples.ts            → Disciples data access (by letter, place, year, search)
│   ├── letters.ts              → Letters data access (by year, recipient, location)
│   ├── utils.ts                → cn() helper
│   ├── [book].ts               → Per-book data access layers (nod, tlc, iso, noi, ej, ek, etc.)
│   ├── other-documents.ts      → Other Documents data access
│   ├── journals.ts             → Journals data access
│   └── magazines.ts            → Magazines data access
├── prisma/
│   └── schema.prisma           → All models (Verse, BookMeta, ProseChapter, Essay, Letter,
│                                  GlossaryEntry, Disciple, Transcription, etc.)
└── public/
    ├── fonts/Noto_Sans/static/ → NotoSans-Regular.ttf + NotoSans-Bold.ttf (OG images)
    ├── images/                 → OG card image (Prabhupāda)
    ├── logo_dark.png           → Logo for light theme
    ├── logo_light.png          → Logo for dark theme
    └── robots.txt

extractor/                      → Extraction & seeding tools (not deployed)
├── scripts/                    → Python extractors + TypeScript seed scripts
├── jsons/                      → Extracted JSON data (books, letters, essays, etc.)
├── html/                       → RTF→HTML converted files
├── rtfs/                       → Original RTF source files
├── fonts/                      → Legacy custom fonts (ScaGoudy, Indevr, Balaram, etc.)
├── app-rtfs/                   → RTF viewer pages (archived)
└── .venv/                      → Python virtual environment
```

---

## Database Schema (Prisma + MongoDB)

```prisma
type Synonym {
  word     String
  meanings String[]
}

model Verse {
  id              String    @id @default(auto()) @map("_id") @db.ObjectId
  book            String    // "bg" | "sb" | "cc" | "sb1962" | "iso" | "noi"
  division        String?   // null for BG/SB1962/ISO/NOI; canto for SB; lila for CC
  chapter         Int
  verse           Int
  verseEnd        Int?
  reference       String
  bookTitle       String
  devanagari      String
  bengali         String?   // only CC has Bengali
  transliteration String
  synonyms        Synonym[]
  translation     String
  purport         String[]

  @@unique([book, division, chapter, verse])
  @@index([book])
  @@index([book, division])
  @@index([book, division, chapter])
  @@map("verses")
}

model BookMeta {
  id   String @id @default(auto()) @map("_id") @db.ObjectId
  book String @unique
  data Json

  @@map("book_meta")
}

model ProseChapter {
  id         String   @id @default(auto()) @map("_id") @db.ObjectId
  book       String
  volume     Int      // 0 = no volumes (sentinel for non-volume books)
  chapter    Int?     // null for intro segments
  title      String
  type       String   // "chapter" | "intro-segment" | "conclusion"
  slug       String
  order      Int
  paragraphs String[]

  @@unique([book, volume, slug])
  @@index([book])
  @@index([book, volume])
  @@index([book, volume, type])
  @@map("prose_chapters")
}

model Essay {
  id         String   @id @default(auto()) @map("_id") @db.ObjectId
  slug       String   @unique
  title      String
  author     String
  year       Int?
  group      String?  // e.g., "two-essays"
  order      Int
  paragraphs String[]

  @@index([group])
  @@map("essays")
}

model OtherDocumentMeta {
  id   String @id @default(auto()) @map("_id") @db.ObjectId
  book String @unique
  data Json

  @@map("other_document_meta")
}

model OtherDocumentChapter {
  id         String   @id @default(auto()) @map("_id") @db.ObjectId
  book       String
  chapter    Int
  title      String
  type       String
  slug       String
  order      Int
  paragraphs String[]

  @@unique([book, slug])
  @@index([book])
  @@map("other_document_chapters")
}

model JournalMeta {
  id   String @id @default(auto()) @map("_id") @db.ObjectId
  book String @unique
  data Json

  @@map("journal_meta")
}

model JournalChapter {
  id         String   @id @default(auto()) @map("_id") @db.ObjectId
  book       String
  chapter    Int
  title      String
  type       String
  slug       String
  order      Int
  paragraphs String[]

  @@unique([book, slug])
  @@index([book])
  @@map("journal_chapters")
}

model MagazineMeta {
  id   String @id @default(auto()) @map("_id") @db.ObjectId
  book String @unique
  data Json

  @@map("magazine_meta")
}

model MagazineIssue {
  id             String   @id @default(auto()) @map("_id") @db.ObjectId
  book           String
  volume         Int
  part           Int
  title          String
  slug           String
  order          Int
  paragraphs     String[]
  paragraphsJson String?  // JSON string fallback for large issues (BSON wire protocol workaround)

  @@unique([book, slug])
  @@index([book])
  @@index([book, volume])
  @@map("magazine_issues")
}

model Letter {
  id               String   @id @default(auto()) @map("_id") @db.ObjectId
  slug             String   @unique
  recipients       String[]   // array of individual recipient names
  recipientDisplay String     // original combined string for display
  date             String?
  dateRef          String?
  year             Int?
  month            Int?
  day              Int?
  location         String?
  salutation       String?
  paragraphs       String[]

  @@index([year])
  @@index([recipients])
  @@index([location])
  @@index([year, month])
  @@map("letters")
}

model GlossaryEntry {
  id             String @id @default(auto()) @map("_id") @db.ObjectId
  term           String
  definition     String
  definitionHtml String

  @@unique([term])
  @@map("glossary")
}

model Disciple {
  id              String    @id @default(auto()) @map("_id") @db.ObjectId
  initiatedName   String
  suffix          String    // "Dasa" | "Devi Dasi" | "Sw"
  initiationDate  DateTime? // 1st of the month (exact day unknown unless verified)
  initiationPlace String?
  karmiName       String?   // pre-initiation (birth) name
  avatar          String?   // URL to profile photo
  about           String?   // biographical notes
  tags            String[]
  isVerified      Boolean   @default(false)

  @@index([initiatedName])
  @@index([initiationPlace])
  @@index([initiationDate])
  @@index([suffix])
  @@index([tags])
  @@map("disciples")
}
```

---

## Disciples Collection

Scraped from `https://sp.krishna.com/disciples_a` through `disciples_y` (21 letter pages; F, Q, W, X, Z have no pages).

- **Total**: 4,747 disciples
- **3,296** Dasa, **1,450** Devi Dasi, **1** Svāmī
- **4,554** have initiation dates (month + year); **193** are missing dates
- **4,703** have initiation places; **44** are missing places
- Initiation dates are set to the **1st day of the month** (exact day unknown from this source)
- On the UI, exact dates should only be shown when `isVerified` is `true`
- `karmiName`, `avatar`, `about`, and `tags` are empty by default — intended for manual curation

Data files: `data/disciples_a_b_c_d_e.json`, `data/disciples_g_to_l.json`, `data/disciples_m_n_o_p.json`, `data/disciples_r_s_t.json`, `data/disciples_u_v_y.json`

Seed script: `npx tsx scripts/seed-disciples.ts`

---

## Books Extracted

### Verse-based Books (stored in `verses` collection)

| Book | Code | Verses | Chapters | Division |
|------|------|--------|----------|----------|
| Bhagavad-gītā As It Is | `bg` | 653 | 18 | — |
| Śrīmad-Bhāgavatam | `sb` | 8,258 | 213 | 10 cantos |
| Śrī Caitanya-caritāmṛta | `cc` | 11,348 | 62 | 3 līlās |
| SB First Canto (1962 Edition) | `sb1962` | 762 | 19 | — |
| Śrī Īśopaniṣad | `iso` | 19 | — | Invocation + 18 mantras |
| The Nectar of Instruction | `noi` | 11 | — | 11 texts |
| Śrī Brahma-saṁhitā | `bs` | 62 | 1 (Ch. 5) | — |
| Mukunda-mālā-stotra | `mm` | 6 | 1 | — |
| Nārada-bhakti-sūtra | `nbs` | 8 | 1 | — |

### Prose Books (stored in `prose_chapters` collection)

| Book | Code | Chapters | Source |
|------|------|----------|--------|
| Kṛṣṇa Book | `kb` | 89 (2 volumes) | other.html |
| The Nectar of Devotion | `nod` | 51 (4 parts) | other.html |
| Teachings of Lord Caitanya | `tlc` | 32 (2 parts) | other.html (1968 ed., plain English) |
| Easy Journey to Other Planets | `ej` | 2 | other.html |
| Elevation to Kṛṣṇa Consciousness | `ek` | 6 | other.html |
| Kṛṣṇa Consciousness: The Matchless Gift | `mg` | 7 | other.html |
| Beyond Birth and Death | `bbd` | 5 | other.html |
| On the Way to Kṛṣṇa | `owk` | 5 | other.html |
| Rāja-vidyā: The King of Knowledge | `rv` | 8 | other.html |
| The Perfection of Yoga | `poy` | 11 | other.html |
| Perfect Questions Perfect Answers | `pqpa` | 9 | other.html |
| Transcendental Teachings of Prahlāda Mahārāja | `ttp` | 5 | other.html |
| On Chanting the Hare Kṛṣṇa Mantra | `ochkm` | 4 | other.html |
| The Kṛṣṇa Consciousness Handbook | `hkh` | 19 | other.html |
| The Science of Self-Realization | `ssr` | 50 sub-chapters (8 parents) | other.html |
| Dialectic Spiritualism | `ds` | 36 sub-chapters (13 parents) | other.html |
| Life Comes from Life | `lcl` | 16 | other.html |
| Light of the Bhāgavata | `lob` | 48 | other.html |
| Teachings of Lord Kapila | `tlk` | 18 | other.html |
| Teachings of Queen Kuntī | `tqk` | 26 | other.html |
| Gītār Gān | `gg` | 18 | other.html (Bengali poetic BG) |
| Songs of the Vaiṣṇava Ācāryas | `sva` | 67 songs (4 parts, hierarchical) | other.html |
| Message of Godhead | `mog` | 3 | others-before-1977.html |
| Śrī Caitanya-bhāgavata Commentary | `cbhc` | 4 | others-before-1977.html |
| Bhagavāner Kathā | `bk` | 2 | others-before-1977.html (ScaGoudy) |
| Prayers of King Kulaśekhara (1958) | `pk` | 6 | others-before-1977.html |
| Vaiśiṣṭyāṣṭakam | `va` | 8 | others-before-1977.html |

### Essays (stored in `essays` collection)

| Essay | Slug | Group | Year |
|-------|------|-------|------|
| Krishna The Reservoir Of Pleasure | `krishna-reservoir-of-pleasure` | `two-essays` | 1966 |
| Who Is Crazy? | `who-is-crazy` | `two-essays` | 1966 |
| The Spiritual Masters | `the-spiritual-masters` | `cc-essays` | 1960 |
| The Absolute Truth | `the-absolute-truth` | `cc-essays` | 1957 |
| The Causes of Lord Caitanya's Incarnation | `causes-of-lord-caitanyas-incarnation` | `cc-essays` | 1957 |
| The Confidential Reasons for Lord Caitanya's Appearance | `confidential-reasons-for-lord-caitanyas-appearance` | `cc-essays` | 1957 |
| The Glories of Lord Nityānanda | `glories-of-lord-nityananda` | `cc-essays` | 1957 |
| Man Is the Architect of His Own Fortune | `man-is-the-architect-of-his-own-fortune` | `pre-1977-essays` | — |
| What Is the Matter with the World? | `what-is-the-matter-with-the-world` | `pre-1977-essays` | 1957 |
| Religion Is Godly Life | `religion-is-godly-life` | `pre-1977-essays` | — |
| Truth and Beauty | `truth-and-beauty` | `pre-1977-essays` | 1958 |
| Misuse of Public Fund in the Name of Religion | `misuse-of-public-fund-in-the-name-of-religion` | `pre-1977-essays` | 1958 |
| Perfection at Home | `perfection-at-home` | `pre-1977-essays` | — |
| How Should One Cultivate Human Spirit | `how-should-one-cultivate-human-spirit` | `pre-1977-essays` | 1961 |
| Viswa Dharma | `viswa-dharma` | `pre-1977-essays` | — |
| Glorification of Śrīla Bhaktisiddhānta Sarasvatī Ṭhākura | `glorification-of-srila-bhaktisiddhanta-sarasvati-thakura` | `pre-1977-essays` | 1952 |
| Who Is Crazy? (Back to Godhead #66) | `who-is-crazy-btg66` | `pre-1977-essays` | — |
| Manifestation of Dharma in Human Being | `manifestation-of-dharma-in-human-being` | `pre-1977-essays` | 1972 |
| Message of Krishna Consciousness | `message-of-krishna-consciousness` | `pre-1977-essays` | 1972 |
| A Wrong Civilization | `a-wrong-civilization` | `pre-1977-essays` | 1936 |
| Vedānta-sūtra (Typed Transcript) | `vedanta-sutra-typed` | `typed-transcripts` | 1969 |
| Shaktipujah | `shaktipujah` | `reviews` | — |
| Devotee and the Divinity | `devotee-and-the-divinity` | `standalone` | — |

### Other Documents (stored in `other_document_meta` + `other_document_chapters` collections)

| Document | Code | Chapters |
|----------|------|----------|
| An Analysis of Bhagwat Geeta | `analysis-bg` | 3 |
| Solution of Present Crisis by Bhagwat Geeta | `solution-crisis` | 4 |
| Śrī Caitanya Mahāprabhu | `sri-caitanya` | 3 |
| Conception of Geeta Nagari on the Principles of Gandhi | `geeta-nagari` | 1 |
| The Real Peace Formula | `real-peace-formula` | 3 |
| International Institution for God Consciousness | `intl-institution-god-consciousness` | 1 |
| "Srimad Bhawatam" India's Message of Peace and Goodwill | `srimad-bhawatam-message` | 1 |
| Viraha Aṣṭaka | `viraha-astaka` | 8 |
| Vṛndāvana Bhajana | `vrndavana-bhajana` | 1 |
| Prayer unto the Lotus Feet of Kṛṣṇa | `prayer-unto-lotus-feet-of-krsna` | 1 |
| Märkine Bhägavata-dharma | `markine-bhagavata-dharma` | 1 |
| Jaladuta Pamphlet | `jaladuta-pamphlet` | 1 |

### Journals (stored in `journal_meta` + `journal_chapters` collections)

| Journal | Code | Chapters | Structure |
|---------|------|----------|-----------|
| The Jaladuta Diary, 1965 | `jaladuta-diary` | 85 | Preface, Introduction, 83 day entries grouped by month (Apr–Nov 1965) |
| The Beginning — The 1966 New York Journal | `the-beginning` | 215 | Introduction, 3 place-based chapters with day entries, Memoranda, Epilogue, 20 Excerpts |

### Magazines (stored in `magazine_meta` + `magazine_issues` collections)

| Magazine | Code | Issues | Articles | Flag | Source |
|----------|------|--------|----------|------|--------|
| Back to Godhead (1944–1960) | `btg` | 29 | 89 | Pre 1978 | btg-1960.html |
| Back to Godhead (1966–1973) | `btg-1978` | 30 | 1,035 | Pre 1978 | btg-1978.html |

### Letters (stored in `letters` collection)

| Metric | Value |
|--------|-------|
| Total letters | 6,866 |
| Unique recipients (individual) | 2,243 |
| Unique locations | 164 |
| Year range | 1947–1977 |
| Total paragraphs | 52,261 |

**Top recipients**: Satsvarupa (182), Brahmananda (168), Hansadutta (117), Tamala Krsna (115), Gurudasa (103), Mukunda (105), Madhudvisa (90), Karandhara (90)

**Top locations**: Los Angeles (1,392), Bombay (1,086), Vrindaban (532), Mayapur (305), London (264), Calcutta (250), Honolulu (239)

**Schema notes**:
- `recipients` is an array of individual names (e.g., `["Mukunda", "Janaki"]`)
- `recipientDisplay` is the original combined string (e.g., `"Mukunda, Janaki"`)
- Searching for a recipient uses Prisma `{ has: name }` to match any letter where that person appears
- Multi-recipient groups are split by `,`, `;`, ` and `, ` & `
- Trailing punctuation (`:`, `,`, `.`) cleaned from names

### Other

| Content | Collection |
|---------|-----------|
| Glossary (2,749 entries) | `glossary` |

---

## Font Encoding System

### ScaGoudy → IAST mapping (used in BG, SB, CC, ISO, NOI, NoD, and most 1969+ books)

```
ä→ā  Ä→Ā  å→ṛ  Å→Ṛ  ñ→ṣ  Ñ→Ṣ  ö→ṭ  Ö→Ṭ  ë→ṇ  Ë→Ṇ  ò→ḍ  Ò→Ḍ
ç→ś  Ç→Ś  ì→ṅ  ï→ñ  ü→ū  Ü→Ū  é→ī  É→Ī  à→ṁ  ù→ḥ  è→ṝ  û→ṁl  ÿ→ḷ
```

### Bengali fonts (Inbenr/Inbeni in CC)

Custom-encoded fonts where ASCII codepoints render as Bengali script. Fixed by `fix-bengali-encoding.py`.

### RM Devanagari font (used in ISO, NOI)

Custom-encoded Devanagari font (p51 CSS class). The text appears as garbled ASCII without the font. **Skipped during extraction** — Unicode Devanagari is generated from IAST transliteration instead.

### Devanagari generation

IAST transliteration → Devanagari via `indic-transliteration` library. Key fixes:
- `join_virama_words()` — joins virāma + consonant AND virāma + vowel
- `normalize_devanagari_anusvara()` — ङ् → ं before velars, ञ् → ं before palatals

### Books without ScaGoudy encoding

- **TLC (1968 Edition)** — plain English transliterations ("Krishna" not "Kṛṣṇa")
- **Two Essays (1966)** — plain English
- **GG (Gītār Gān)** — Bengali poetic text (ScaGoudy decoded for transliteration)
- **LCL (Life Comes from Life)** — dialogue book, ScaGoudy decoded
- **MOG, CBHC, PK** — pre-1977 handwritten documents, plain English
- **BK (Bhagavāner Kathā)** — pre-1977, uses ScaGoudy encoding
- **CC Essays, Vedānta-sūtra transcript** — plain English
- All other books from other.html use ScaGoudy encoding

---

## Book Types and URL Patterns

### Verse-based books (use ChapterViewer client component)

| Route Pattern | Books |
|---------------|-------|
| `/books/bg/[chapter]/[verse]` | BG |
| `/books/sb/[canto]/[chapter]/[verse]` | SB |
| `/books/cc/[lila]/[chapter]/[verse]` | CC |
| `/books/sb1962/[chapter]/[verse]` | SB1962 |
| `/books/iso/[mantra]` | Īśopaniṣad (verse + intro segments) |
| `/books/noi/[text]` | Nectar of Instruction (verse + intro segments) |
| `/books/bs/[chapter]/[verse]` | Brahma-saṁhitā (chapter 5, 62 verses) |
| `/books/mm/[chapter]/[verse]` | Mukunda-mālā-stotra (6 mantras) |
| `/books/nbs/[chapter]/[verse]` | Nārada-bhakti-sūtra (8 sūtras) |

### Prose books (use per-book data layers + reading pages)

| Route Pattern | Books |
|---------------|-------|
| `/books/kb/[volume]/[slug]` | Kṛṣṇa Book |
| `/books/{code}/[chapter]` | NoD, TLC, EJ, EK, MG, BBD, OWK, RV, POY, PQPA, TTP, OCHKM, HKH, LCL, LOB, TLK, TQK, GG, MOG, CBHC, BK, PK |

### Hierarchical prose books (sub-chapters as separate pages)

| Route Pattern | Books |
|---------------|-------|
| `/books/ssr/[chapter]` | Science of Self-Realization (slugs: "1-1", "1-2", "intro-foreword", etc.) |
| `/books/ds/[chapter]` | Dialectic Spiritualism (slugs: "1-1" = Socrates, "1-2" = Plato, etc.) |
| `/books/sva/[chapter]` | Songs of the Vaiṣṇava Ācāryas (slugs: "1-1" = Śrī Guru Praṇāma, etc.) |

### Essays

| Route | Content |
|-------|---------|
| `/essays` | Searchable essay grid (23 essays across 6 groups) |
| `/essays/[slug]` | Individual essay reader |

### Other Documents

| Route | Content |
|-------|---------|
| `/other-documents` | Searchable other documents grid (12 documents) |
| `/other-documents/[slug]` | Document index (chapter listing) |
| `/other-documents/[slug]/[chapter]` | Individual chapter reader |

### Journals

| Route | Content |
|-------|---------|
| `/journals` | Journals index (grid) |
| `/journals/[slug]` | Journal chapter listing (hierarchical: place → month → day) |
| `/journals/[slug]/[chapter]` | Individual journal entry reader (slug-based, e.g., `apr-3`, `sep-17`, `excerpt-...`) |

### Magazines

| Route | Content |
|-------|---------|
| `/magazines` | Magazines index (grouped by flag: "Pre 1978 Editions") |
| `/magazines/[slug]` | Magazine issue listing (grouped by volume) |
| `/magazines/[slug]/[issue]` | Individual issue reader (slug-based, e.g., `v1-p1`, `no-17`) |

### Letters

| Route | Content |
|-------|---------|
| `/letters` | Letters index with 3-way navigation tabs |
| `/letters?view=year` | Year grid (1947–1977) with search |
| `/letters?view=recipient` | Recipient list (2,243 individuals) with search + pagination |
| `/letters?view=location` | Location grid (164 locations) with search + pagination |
| `/letters/year/1968` | All letters from a specific year |
| `/letters/recipient/Mukunda` | All letters to/including a specific recipient |
| `/letters/location/Los%20Angeles` | All letters from a specific location |
| `/letters/[slug]` | Individual letter reader with prev/next navigation |

### Other routes

| Route | Content |
|-------|---------|
| `/` | Landing page (responsive 3-column grid) |
| `/books` | Searchable book grid |
| `/glossary` | Searchable glossary (2,749 entries) |
| `/journals` | Journals (2 journals, 300 chapters) |
| `/magazines` | Magazines (2 magazines, 59 issues, Pre 1978) |
| `/letters` | Letters (6,866 letters, 3-way navigation) |
| `/rtfs` | RTF viewer (gated by ALLOW_RTF=true) |
| `/api/verify-access` | Password protection endpoint |

---

## Volume Convention

Books without volumes use `volume: 0` as a sentinel value in the `prose_chapters` collection. This satisfies the Prisma schema's `@@unique([book, volume, slug])` constraint without requiring schema changes.

- KB uses `volume: 1` and `volume: 2`
- All other prose books use `volume: 0`

---

## Hierarchical Books (SSR, DS)

SSR and DS have parent chapters with sub-chapters stored as individual `prose_chapters` docs:

- Sub-chapter slugs: `"1-1"`, `"1-2"`, `"2-1"`, etc.
- Parent chapter info stored in `intro.json` metadata:
  ```json
  {
    "chapters": [
      {
        "number": 1,
        "title": "Learning the Science of the Soul",
        "subChapters": [
          { "slug": "1-1", "title": "Seeing the Aim of Human Life" },
          { "slug": "1-2", "title": "Your Original Consciousness Is Kṛṣṇa Consciousness" }
        ]
      }
    ]
  }
  ```
- Sidebar UI shows parent headings (non-clickable) with sub-chapters indented below
- Prev/next navigation skips parent headings

---

## UI Features

### Reading Settings (accessibility)
- **Theme**: Light / Dark / System toggle
- **Serif Font**: Toggle to switch reading content to Georgia/serif
- **Font Size**: Slider (XS → XXL) using CSS `zoom` on `main` and `aside`
- **Justify Text**: Toggle for justified text alignment on reading content
- Settings persist in `localStorage` under `spsays_reading_prefs`
- Applied via CSS classes on `<html>` element

### Mobile Navigation
- Left-slide drawer (vaul) triggered by a menu button next to the Previous button
- Only visible below `lg` breakpoint
- Shows the full sidebar navigation grouped by section
- Implemented in all 24+ reader pages via shared `MobileNav` component

### Search
- Books page: diacritic-aware search (typing "Krsna" matches "Kṛṣṇa")
- Glossary page: full-text search across terms and definitions
- Uses Unicode NFD normalization + manual IAST character stripping

### Color Palette
- **Light mode ("Aged Parchment")**: Warm cream backgrounds, deep sepia text, saffron/ochre primary
- **Dark mode ("Ancient Manuscript")**: Deep warm brown backgrounds, parchment text, golden saffron primary

### Text Selection Toolbar
- Global floating toolbar appears on text selection across all reading pages (except RTFs)
- **Desktop**: floating pill above selection; **Mobile**: fixed bottom bar
- Actions: Ask Kautilya (Phase II), Share, Copy (with source reference), More
- **Share**: modal (desktop) / bottom drawer (mobile) — share to feed, copy highlight link
- **More**: popover (desktop) / bottom drawer (mobile) — bookmark, save to collection, copy link, mention
- **Copy** appends source reference: title, chapter/verse, highlight URL
- All toolbar surfaces use dark contrast treatment (bg-black, border-white/10)
- Kautilya lotus icon for the AI companion button
- On iOS Safari mobile, selection is saved/restored when drawers open/close to prevent focus conflicts

### Text Highlight Links
- Selected text encoded as compact URL fragment: `?hl=prefix§suffix§length`
- Uses `§` delimiter (safe for Sanskrit, English, and all Vedic text)
- Short selections (≤8 words) use full text as prefix
- Incoming `?hl=` URLs: text is found in DOM, wrapped in `<mark>`, scrolled to, highlighted permanently
- `TextHighlighter` component runs on page load via `useSearchParams`
- Server-side `extractMatchedText()` searches paragraphs for OG image quote extraction
- Case-insensitive matching for both DOM highlighting and server-side text extraction
- Cross-paragraph matching via position mapping (spaces inserted at element boundaries)

### Dynamic OG Images
- `/api/og` route generates 1200×630 PNG images using `next/og` (Satori)
- Left panel: Prabhupāda image with quote mark and branding (from PNG)
- Right panel: title (bold), detail, quote text, "Read more at prabhupadasays.org"
- Font: Noto Sans Regular + Bold loaded from `public/fonts/Noto_Sans/static/` — full IAST diacritical support
- All 104 content pages have `generateMetadata` with contextual fallback descriptions
- When `?hl=` is present, the actual selected text is extracted from DB content for the OG quote

### Site Footer
- Global footer on every page with © year, About link, Home link

### Consistent Container Width
- All pages use `max-w-5xl` for both header and body containers

---

## Environment Variables

```
DATABASE_URL=mongodb://user:pass@host:port/spsays?authSource=admin
NEXT_PUBLIC_SITE_URL=https://prabhupadasays.org
```

---

## How to Run

```bash
# Development (from knowledgebase/)
npm run dev

# Prisma
npx prisma generate                  # Regenerate Prisma client after schema changes

# Build
npx next build

# Extraction & seeding scripts are in extractor/ — see extractor/scripts/

# BFF API server (from ../spsays-bff/)
make run                             # Build + start Go API on :8080
```

---

## Verse JSON Schema (BG/SB/CC/SB1962/ISO/NOI)

```json
{
  "book_title": "Śrīmad-Bhāgavatam",
  "canto": 1,
  "chapter": 1,
  "verse": 1,
  "verse_end": null,
  "reference": "SB 1.1.1",
  "devanagari": "ॐ नमो भगवते वासुदेवाय\nजन्माद्यस्य यतो ...",
  "bengali": null,
  "transliteration": "om namo bhagavate vāsudevāya\njanmādy asya yato ...",
  "synonyms": [
    { "word": "om", "meanings": ["O my Lord"] },
    { "word": "namaḥ", "meanings": ["offering my obeisances"] }
  ],
  "translation": "<b>I offer my obeisances unto Lord Śrī Kṛṣṇa...</b>",
  "purport": ["paragraph 1...", "paragraph 2..."]
}
```

## Prose Chapter JSON Schema

```json
{
  "book": "ek",
  "chapter": 1,
  "title": "Choosing Human and Animal Lives",
  "type": "chapter",
  "paragraphs": ["<b>heading</b>", "body text...", "<div style=\"text-align:center\"><i>verse</i></div>"]
}
```

## Intro Segment JSON Schema

```json
{
  "slug": "preface",
  "title": "Preface",
  "type": "intro-segment",
  "book": "ek",
  "order": 2,
  "paragraphs": ["paragraph 1...", "paragraph 2..."]
}
```

## Essay JSON Schema

```json
{
  "slug": "krishna-reservoir-of-pleasure",
  "title": "Krishna The Reservoir Of Pleasure",
  "author": "His Divine Grace A.C. Bhaktivedanta Swami Prabhupāda",
  "year": 1966,
  "group": "two-essays",
  "order": 1,
  "paragraphs": ["paragraph 1...", "paragraph 2..."]
}
```

## Glossary JSON Schema

```json
{
  "title": "Glossary of Vedic Terms",
  "description": "A comprehensive glossary...",
  "totalEntries": 2749,
  "letters": ["A", "B", "C", ...],
  "entries": [
    {
      "term": "Ācārya",
      "definition": "a spiritual master who teaches by his own example...",
      "definition_html": "a spiritual master who teaches by his own example..."
    }
  ]
}
```

Glossary is browsed via `/glossary/{letter}` routes (A-Z). Each letter page shows terms grouped by base letter (diacritical variants mapped: Ā→A, Ś→S, Ṛ→R, etc.). Single entry view with prev/next navigation.

---

## Known Issues

1. **MongoDB BSON wire corruption**: The MongoDB server occasionally corrupts large BSON documents. Workaround: seed using `insertOne` + `$push` for paragraphs one at a time.

2. **SB verse numbering**: 5 duplicate verse reference tags in the HTML. Fixed by using the TEXT N header as authoritative.

3. **RTF routes gated**: `/rtfs` only accessible when `ALLOW_RTF=true`.

4. **`scripts/` excluded from tsconfig**: Prevents TypeScript build errors from seed scripts.

5. **CSS zoom for font scaling**: `zoom` property works in Chrome/Safari/Edge but may not work in older Firefox (< 126). A `transform: scale()` fallback is provided via `@supports not (zoom: 1.1)`.

6. **Password protection requires ACCESS_KEY at runtime**: The `PasswordGate` component checks the server at runtime via `/api/verify-access`. The env var must be available when the server is running, not just at build time.