fix: og image generation

lib/og.ts

@@ -20,6 +20,91 @@ export type OgParams = {
   quote?: string;
 };
 
+// ---------------------------------------------------------------------------
+// Fallback descriptions — used when no quote/description is provided
+// ---------------------------------------------------------------------------
+
+const SITE_DESCRIPTION =
+  "Browse the original, unedited books, letters, and teachings of His Divine Grace A.C. Bhaktivedanta Swami Prabhupāda — presented as they are.";
+
+const BOOK_DESCRIPTIONS: Record<string, string> = {
+  bg: "The definitive guide to the science of self-realization, spoken by Lord Śrī Kṛṣṇa to His devotee Arjuna on the Battlefield of Kurukṣetra.",
+  sb: "The ripened fruit of the tree of Vedic literature — 18,000 verses describing the pastimes of the Supreme Lord and His devotees.",
+  cc: "The life and teachings of Śrī Caitanya Mahāprabhu, the most munificent incarnation of Godhead who distributed love of God freely to all.",
+  sb1962:
+    "The original 1962 edition of Śrīmad-Bhāgavatam — Śrīla Prabhupāda's first major literary contribution in English.",
+  iso: "Eighteen mantras revealing the essential teachings of the Vedas — the relationship between God, the living entity, and the material world.",
+  noi: "Eleven verses by Śrīla Rūpa Gosvāmī providing essential instructions for serious practitioners of devotional service.",
+  nod: "A comprehensive guide to the science of bhakti-yoga, summarizing Śrīla Rūpa Gosvāmī's Bhakti-rasāmṛta-sindhu.",
+  bs: "The prayers of Lord Brahmā glorifying the Supreme Lord Govinda — with translation and commentary by Śrīla Prabhupāda.",
+  mm: "Devotional prayers of King Kulaśekhara expressing the purest sentiments of surrender to Lord Kṛṣṇa.",
+  nbs: "The eternal principles of devotional service as taught by the great sage Nārada Muni.",
+  kb: "The enchanting pastimes of Lord Śrī Kṛṣṇa in Vṛndāvana and Dvārakā — the Supreme Personality of Godhead in His original form.",
+  tlc: "The sublime teachings of Lord Śrī Caitanya Mahāprabhu to Śrīla Sanātana Gosvāmī, Śrīla Rūpa Gosvāmī, and others.",
+  ej: "A scientific presentation of the anti-material world and how the soul can travel there.",
+  ek: "How to elevate consciousness from the material to the spiritual platform through the practice of Kṛṣṇa consciousness.",
+  mg: "An introduction to the unmatched gift of Kṛṣṇa consciousness — the path to eternal happiness and self-realization.",
+  bbd: "A concise exploration of the soul's journey through repeated birth and death, and the path to liberation.",
+  owk: "Practical guidance on the journey toward Kṛṣṇa — developing love of God through devotional service.",
+  rv: "The king of knowledge — understanding the supreme science of devotional service as taught in the Bhagavad-gītā.",
+  poy: "The perfection of the yoga system — how bhakti-yoga surpasses all other forms of yoga and meditation.",
+  pqpa: "Conversations between Śrīla Prabhupāda and Bob Cohen — answering life's most fundamental questions.",
+  ttp: "The teachings of Lord Kapila to His mother Devahūti on the science of God realization and devotional service.",
+  ochkm:
+    "The transcendental vibration of the Hare Kṛṣṇa mahā-mantra — its meaning, potency, and practice.",
+  hkh: "A practical handbook for understanding and practicing Kṛṣṇa consciousness in daily life.",
+  lcl: "Morning walks with Śrīla Prabhupāda — challenging the fundamental assumptions of modern science.",
+  lob: "Meditations on the beauty of nature as a reflection of the Supreme Lord's transcendental opulence.",
+  tlk: "Lord Kapila's instructions on Sāṅkhya philosophy and the path of devotional service.",
+  tqk: "The prayers and teachings of Queen Kuntī — exemplifying pure devotion in the face of adversity.",
+  gg: "Bengali poetic renderings of the Bhagavad-gītā by Śrīla Prabhupāda.",
+  mog: "Śrīla Prabhupāda's message of Godhead — presenting the Absolute Truth for the modern world.",
+  cbhc: "Commentary on the Śrī Caitanya-bhāgavata — the pastimes of Lord Caitanya by Vṛndāvana dāsa Ṭhākura.",
+  bk: "Bhagavāner Kathā — Bengali narration of the pastimes of the Supreme Lord.",
+  pk: "Prabhupāda-Kṛpā — the mercy of Śrīla Prabhupāda preserved in his writings.",
+  ssr: "Conversations and essays illuminating the timeless science of self-realization for the modern reader.",
+  ds: "Śrīla Prabhupāda's critique of Western philosophy from Socrates to Sartre — in light of Vedic wisdom.",
+  sva: "Sacred songs of the great Vaiṣṇava ācāryas — prayers and bhajanas with translations and purports.",
+  va: "Śrīla Prabhupāda's commentary on the Vedānta-sūtra — the conclusion of all Vedic knowledge.",
+};
+
+const CONTENT_TYPE_DESCRIPTIONS: Record<string, string> = {
+  letters:
+    "Personal correspondence by Śrīla Prabhupāda — guiding disciples, Godbrothers, and well-wishers in the science of Kṛṣṇa consciousness.",
+  essays:
+    "Foundational essays on the science of Kṛṣṇa consciousness by His Divine Grace A.C. Bhaktivedanta Swami Prabhupāda.",
+  glossary:
+    "A comprehensive glossary of Sanskrit and Vedic terms from the books of Śrīla Prabhupāda.",
+  disciples:
+    "A directory of disciples initiated by Śrīla Prabhupāda between 1966 and 1977.",
+  journals:
+    "From the personal journals of Śrīla Prabhupāda — a window into the daily life and mission of the Founder-Ācārya of ISKCON.",
+  magazines:
+    "Back to Godhead — the magazine founded by Śrīla Prabhupāda in 1944 to present the timeless science of Kṛṣṇa consciousness.",
+  "other-documents":
+    "Writings and analyses by His Divine Grace A.C. Bhaktivedanta Swami Prabhupāda.",
+};
+
+function getFallbackQuote(title: string, code?: string): string {
+  // Book-specific description
+  if (code && BOOK_DESCRIPTIONS[code]) {
+    return BOOK_DESCRIPTIONS[code];
+  }
+
+  // Content-type descriptions
+  if (title.startsWith("Letter to")) {
+    return CONTENT_TYPE_DESCRIPTIONS.letters;
+  }
+  for (const [key, desc] of Object.entries(CONTENT_TYPE_DESCRIPTIONS)) {
+    if (title.toLowerCase().includes(key)) {
+      return desc;
+    }
+  }
+
+  // Generic fallback
+  return SITE_DESCRIPTION;
+}
+
 // ---------------------------------------------------------------------------
 // Build the /api/og image URL
 // ---------------------------------------------------------------------------
@@ -92,7 +177,10 @@ export function buildOgMeta(params: OgParams & { description?: string }) {
 /** OG metadata for a book page. */
 export function ogForBook(code: string) {
   const title = BOOK_NAMES[code] || code.toUpperCase();
-  return buildOgMeta({ title });
+  return buildOgMeta({
+    title,
+    quote: getFallbackQuote(title, code),
+  });
 }
 
 /** OG metadata for a verse page. */
@@ -112,13 +200,21 @@ export function ogForVerse(
     detail = `Chapter ${parts.chapter}, Verse ${parts.verse}`;
   }
 
-  return buildOgMeta({ title, detail });
+  return buildOgMeta({
+    title,
+    detail,
+    quote: getFallbackQuote(title, code),
+  });
 }
 
 /** OG metadata for a prose chapter. */
 export function ogForChapter(code: string, chapterTitle: string) {
   const bookTitle = BOOK_NAMES[code] || code.toUpperCase();
-  return buildOgMeta({ title: bookTitle, detail: chapterTitle });
+  return buildOgMeta({
+    title: bookTitle,
+    detail: chapterTitle,
+    quote: getFallbackQuote(bookTitle, code),
+  });
 }
 
 /** OG metadata for an essay. */
@@ -126,6 +222,7 @@ export function ogForEssay(title: string) {
   return buildOgMeta({
     title,
     detail: "Essay by Śrīla Prabhupāda",
+    quote: CONTENT_TYPE_DESCRIPTIONS.essays,
   });
 }
 
@@ -134,6 +231,7 @@ export function ogForLetter(recipient: string, meta?: string) {
   return buildOgMeta({
     title: `Letter to ${recipient}`,
     detail: meta || undefined,
+    quote: CONTENT_TYPE_DESCRIPTIONS.letters,
   });
 }
 
@@ -142,6 +240,7 @@ export function ogForJournal(journalTitle: string, entryTitle?: string) {
   return buildOgMeta({
     title: journalTitle,
     detail: entryTitle || undefined,
+    quote: CONTENT_TYPE_DESCRIPTIONS.journals,
   });
 }
 
@@ -150,6 +249,7 @@ export function ogForMagazine(magazineTitle: string, issueTitle?: string) {
   return buildOgMeta({
     title: magazineTitle,
     detail: issueTitle || undefined,
+    quote: CONTENT_TYPE_DESCRIPTIONS.magazines,
   });
 }
 
@@ -158,6 +258,42 @@ export function ogForOtherDocument(docTitle: string, chapterTitle?: string) {
   return buildOgMeta({
     title: docTitle,
     detail: chapterTitle || undefined,
+    quote: CONTENT_TYPE_DESCRIPTIONS["other-documents"],
+  });
+}
+
+/** OG metadata for the disciples directory. */
+export function ogForDisciples() {
+  return buildOgMeta({
+    title: "Disciples of Śrīla Prabhupāda",
+    quote: CONTENT_TYPE_DESCRIPTIONS.disciples,
+  });
+}
+
+/** OG metadata for letters filtered by year. */
+export function ogForLettersByYear(year: number, count: number) {
+  return buildOgMeta({
+    title: `Letters from ${year}`,
+    detail: `${count} ${count === 1 ? "letter" : "letters"}`,
+    quote: `Śrīla Prabhupāda's correspondence from ${year} — personal letters guiding disciples and well-wishers in the science of Kṛṣṇa consciousness.`,
+  });
+}
+
+/** OG metadata for letters filtered by recipient. */
+export function ogForLettersByRecipient(name: string, count: number) {
+  return buildOgMeta({
+    title: `Letters to ${name}`,
+    detail: `${count} ${count === 1 ? "letter" : "letters"}`,
+    quote: `Śrīla Prabhupāda's personal correspondence to ${name} — instructions, blessings, and guidance in devotional service.`,
+  });
+}
+
+/** OG metadata for letters filtered by location. */
+export function ogForLettersByLocation(location: string, count: number) {
+  return buildOgMeta({
+    title: `Letters from ${location}`,
+    detail: `${count} ${count === 1 ? "letter" : "letters"}`,
+    quote: `Śrīla Prabhupāda's letters written from ${location} — chronicling the worldwide mission of the Hare Kṛṣṇa movement.`,
   });
 }
 
@@ -165,7 +301,7 @@ export function ogForOtherDocument(docTitle: string, chapterTitle?: string) {
 export function ogDefault() {
   return buildOgMeta({
     title: "Prabhupāda Says",
-    description:
-      "Browse the books and teachings of His Divine Grace A.C. Bhaktivedanta Swami Prabhupāda",
+    description: SITE_DESCRIPTION,
+    quote: SITE_DESCRIPTION,
   });
 }