Add new database structure synchronisation at build time

modules/database.sync/module.ts

@@ -0,0 +1,52 @@
+import { defineNuxtModule } from '@nuxt/kit'
+import { Database } from "bun:sqlite";
+
+interface Schema
+{
+    type: string;
+    name: string;
+    tbl_name: string;
+    sql: string;
+}
+interface Structure
+{
+    cid: number;
+    name: string;
+    type: string;
+    [key: string]: number | string | null;
+}
+
+export default defineNuxtModule({
+  setup (options, nuxt) {
+    nuxt.hook('build:done', () => {
+        console.log("Building database");
+
+        const template = new Database(nuxt.options.runtimeConfig.templateFile);
+        const schema = template.query(`SELECT * FROM sqlite_schema WHERE type = 'table'`).all() as Schema[];
+
+        const db = new Database(nuxt.options.runtimeConfig.dbFile);
+        db.exec(`PRAGMA foreign_keys = 0`);
+        const structure = db.query(`SELECT * FROM pragma_table_info(?1)`);
+
+        (db.transaction((tables: Schema[]) => {
+            for(const table of tables)
+            {
+                if(table.name === 'sqlite_sequence')
+                    continue;
+                
+                const columns = structure.all(table.name) as Structure[];
+
+                db.exec(`ALTER TABLE ${table.name} RENAME TO ${table.name}_old`);
+                db.exec(table.sql);
+                db.exec(`INSERT INTO ${table.name} (${columns.map(e => `"${e.name}"`).join(', ')}) SELECT * FROM ${table.name}_old`);
+                db.exec(`DROP TABLE ${table.name}_old`);
+            }
+        })).immediate(schema);
+
+        db.exec(`PRAGMA foreign_keys = 1`);
+
+        db.close();
+        template.close();
+    });
+  }
+})

nuxt.config.ts

@@ -1,4 +1,5 @@
 // https://nuxt.com/docs/api/configuration/nuxt-config
+import DatabaseSync from './modules/database.sync/module';
 
 export default defineNuxtConfig({
   modules: [
@@ -6,9 +7,11 @@ export default defineNuxtConfig({
     "nuxt-security",
     "@nuxtjs/tailwindcss",
     "@vueuse/nuxt",
+    DatabaseSync
   ],
   runtimeConfig: {
     dbFile: 'db.sqlite',
+    templateFile: 'template.sqlite',
     session: {
       password: '699c46bd-9aaa-4364-ad01-510ee4fe7013'
     }