I Want To Heal 2 web/server v1.0.0

server/db.mjs

@@ -0,0 +1,32 @@
+import pg from 'pg'
+
+const { Pool } = pg
+
+export function getDatabaseUrl() {
+  const databaseUrl = process.env.DATABASE_URL
+  if (!databaseUrl) {
+    throw new Error('DATABASE_URL is required for server database access.')
+  }
+  return databaseUrl
+}
+
+export function createPool() {
+  return new Pool({
+    connectionString: getDatabaseUrl(),
+    max: Number(process.env.DB_POOL_MAX ?? 10),
+  })
+}
+
+export async function waitForDatabase(pool, attempts = 30) {
+  let lastError
+  for (let attempt = 1; attempt <= attempts; attempt += 1) {
+    try {
+      await pool.query('select 1')
+      return
+    } catch (error) {
+      lastError = error
+      await new Promise((resolve) => setTimeout(resolve, Math.min(5000, attempt * 500)))
+    }
+  }
+  throw lastError
+}