database reading

node_modules/@sqlite.org/sqlite-wasm/bin/index.js

@@ -0,0 +1,62 @@
+#!/usr/bin/env node
+import fs from 'fs';
+import fetch from 'node-fetch';
+import decompress from 'decompress';
+
+async function getSqliteWasmDownloadLink() {
+  const response = await fetch('https://sqlite.org/download.html');
+  const html = await response.text();
+  const sqliteWasmLink =
+    'https://sqlite.org/' +
+    html
+      .replace(
+        /^.*?<!-- Download product data for scripts to read(.*?)-->.*?$/gms,
+        '$1',
+      )
+      .split(/\n/)
+      .filter((row) => /sqlite-wasm/.test(row))[0]
+      .split(/,/)[2];
+  console.log(`Found SQLite Wasm download link: ${sqliteWasmLink}`);
+  return sqliteWasmLink;
+}
+
+async function downloadAndUnzipSqliteWasm(sqliteWasmDownloadLink) {
+  if (!sqliteWasmDownloadLink) {
+    throw new Error('Unable to find SQLite Wasm download link');
+  }
+  console.log('Downloading and unzipping SQLite Wasm...');
+  const response = await fetch(sqliteWasmDownloadLink);
+  if (!response.ok || response.status !== 200) {
+    throw new Error(
+      `Unable to download SQLite Wasm from ${sqliteWasmDownloadLink}`,
+    );
+  }
+  const buffer = await response.arrayBuffer();
+  fs.writeFileSync('sqlite-wasm.zip', Buffer.from(buffer));
+  const files = await decompress('sqlite-wasm.zip', 'sqlite-wasm', {
+    strip: 1,
+    filter: (file) =>
+      /jswasm/.test(file.path) && /(\.mjs|\.wasm|\.js)$/.test(file.path),
+  });
+  console.log(
+    `Downloaded and unzipped:\n${files
+      .map((file) => (/\//.test(file.path) ? '‣ ' + file.path + '\n' : ''))
+      .join('')}`,
+  );
+  fs.rmSync('sqlite-wasm.zip');
+}
+
+async function main() {
+  try {
+    const sqliteWasmLink = await getSqliteWasmDownloadLink();
+    await downloadAndUnzipSqliteWasm(sqliteWasmLink);
+    fs.copyFileSync(
+      './node_modules/module-workers-polyfill/module-workers-polyfill.min.js',
+      './demo/module-workers-polyfill.min.js',
+    );
+  } catch (err) {
+    console.error(err.name, err.message);
+  }
+}
+
+main();