1.0

src/verse.ts

@@ -0,0 +1,69 @@
+export interface KJVVerseData {
+  verse: number
+  text: string
+}
+
+export interface KJVChapterData {
+  chapter: string
+  verses: KJVVerseData[]
+}
+
+export interface KJVBookData {
+  book: string
+  chapters: KJVChapterData[]
+}
+
+export interface KJVData {
+  books: KJVBookData[]
+}
+
+export interface Verse {
+  text: string
+  reference: string
+}
+
+let flat: Verse[] | null = null
+
+export function daySeed(now: Date = new Date()): number {
+  return Math.floor(now.getTime() / 86_400_000)
+}
+
+export function msUntilMidnightUtc(now: Date = new Date()): number {
+  const next = new Date(now)
+  next.setUTCHours(24, 0, 0, 0)
+  return next.getTime() - now.getTime()
+}
+
+function mulberry32(seed: number): () => number {
+  let a = seed >>> 0
+  return () => {
+    a = (a + 0x6d2b79f5) | 0
+    let t = Math.imul(a ^ (a >>> 15), 1 | a)
+    t = (t + Math.imul(t ^ (t >>> 7), 61 | t)) ^ t
+    return ((t ^ (t >>> 14)) >>> 0) / 4294967296
+  }
+}
+
+export function pickForDay(verses: Verse[], seed: number): Verse {
+  const rand = mulberry32(seed)
+  const index = Math.floor(rand() * verses.length)
+  return verses[index]
+}
+
+export async function loadKJV(): Promise<Verse[]> {
+  if (flat) return flat
+  const res = await fetch('/kjv.json')
+  if (!res.ok) throw new Error(`Failed to load scripture (${res.status})`)
+  const data = (await res.json()) as KJVData
+  flat = []
+  for (const book of data.books) {
+    const name = book.book === 'Psalms' ? 'Psalm' : book.book
+    for (const chapter of book.chapters) {
+      const chapterNumber = Number(chapter.chapter)
+      for (const v of chapter.verses) {
+        flat.push({ text: v.text, reference: `${name} ${chapterNumber}:${v.verse}` })
+      }
+    }
+  }
+  return flat
+}