feat: add SQLite-backed book data access layer

2026-06-15 20:04:16 -06:00
parent 956badf3f1
commit 4741cab30b
2 changed files with 212 additions and 0 deletions
--- a/server/db.ts
+++ b/server/db.ts
@@ -0,0 +1,117 @@
+import { Database } from 'bun:sqlite'
+import { createEmptyBook, type TeachingBook } from '../src/domain/teachingDesign'
+
+export interface BookSummary {
+  id: string
+  name: string
+  updatedAt: string
+  lessonCount: number
+}
+
+export interface BookRecord {
+  id: string
+  name: string
+  updatedAt: string
+  data: TeachingBook
+}
+
+export interface BookMeta {
+  id: string
+  name: string
+  updatedAt: string
+}
+
+interface BookRow {
+  id: string
+  name: string
+  data: string
+  updated_at: string
+}
+
+const SCHEMA = `
+  CREATE TABLE IF NOT EXISTS books (
+    id TEXT PRIMARY KEY,
+    name TEXT NOT NULL,
+    data TEXT NOT NULL,
+    created_at TEXT NOT NULL,
+    updated_at TEXT NOT NULL
+  )
+`
+
+export function openDb(path: string): Database {
+  const db = new Database(path)
+  db.run(SCHEMA)
+  return db
+}
+
+export function listBooks(db: Database): BookSummary[] {
+  const rows = db
+    .query<BookRow, []>('SELECT id, name, data, updated_at FROM books ORDER BY updated_at DESC')
+    .all()
+
+  return rows.map((row) => ({
+    id: row.id,
+    name: row.name,
+    updatedAt: row.updated_at,
+    lessonCount: (JSON.parse(row.data) as TeachingBook).designs.length,
+  }))
+}
+
+export function createBook(db: Database, name: string): BookRecord {
+  const id = crypto.randomUUID()
+  const now = new Date().toISOString()
+  const data = createEmptyBook()
+  data.updatedAt = now
+
+  db.run('INSERT INTO books (id, name, data, created_at, updated_at) VALUES (?, ?, ?, ?, ?)', [
+    id,
+    name,
+    JSON.stringify(data),
+    now,
+    now,
+  ])
+
+  return { id, name, updatedAt: now, data }
+}
+
+export function getBook(db: Database, id: string): BookRecord | null {
+  const row = db
+    .query<BookRow, [string]>('SELECT id, name, data, updated_at FROM books WHERE id = ?')
+    .get(id)
+  if (!row) return null
+
+  return {
+    id: row.id,
+    name: row.name,
+    updatedAt: row.updated_at,
+    data: JSON.parse(row.data) as TeachingBook,
+  }
+}
+
+export function saveBookData(db: Database, id: string, data: TeachingBook): BookMeta | null {
+  const existing = db
+    .query<{ name: string }, [string]>('SELECT name FROM books WHERE id = ?')
+    .get(id)
+  if (!existing) return null
+
+  const now = new Date().toISOString()
+  db.run('UPDATE books SET data = ?, updated_at = ? WHERE id = ?', [JSON.stringify(data), now, id])
+
+  return { id, name: existing.name, updatedAt: now }
+}
+
+export function renameBook(db: Database, id: string, name: string): BookMeta | null {
+  const existing = db
+    .query<{ updated_at: string }, [string]>('SELECT updated_at FROM books WHERE id = ?')
+    .get(id)
+  if (!existing) return null
+
+  db.run('UPDATE books SET name = ? WHERE id = ?', [name, id])
+
+  return { id, name, updatedAt: existing.updated_at }
+}
+
+export function deleteBook(db: Database, id: string): boolean {
+  const result = db.run('DELETE FROM books WHERE id = ?', [id])
+  return result.changes > 0
+}