feat: implement UI-driven database configuration

src/features/settings/actions.ts

@@ -0,0 +1,52 @@
+"use server";
+
+import { Pool } from "pg";
+import fs from "fs/promises";
+import path from "path";
+
+const CONFIG_FILE = path.join(process.cwd(), ".db-config.json");
+
+export interface DbConfig {
+    url: string;
+}
+
+export async function testDatabaseConnection(url: string) {
+    console.log("Testing connection to:", url.replace(/:([^@]+)@/, ":****@"));
+    const pool = new Pool({
+        connectionString: url,
+        connectionTimeoutMillis: 5000,
+    });
+
+    try {
+        const client = await pool.connect();
+        await client.query("SELECT 1");
+        client.release();
+        return { success: true };
+    } catch (error: any) {
+        console.error("Database connection test failed:", error.message);
+        return { success: false, error: error.message };
+    } finally {
+        await pool.end();
+    }
+}
+
+export async function saveDatabaseSettings(url: string) {
+    try {
+        const config: DbConfig = { url };
+        await fs.writeFile(CONFIG_FILE, JSON.stringify(config, null, 2));
+        console.log("Database configuration saved to:", CONFIG_FILE);
+        return { success: true };
+    } catch (error: any) {
+        console.error("Failed to save database configuration:", error.message);
+        return { success: false, error: error.message };
+    }
+}
+
+export async function getSavedDatabaseConfig(): Promise<DbConfig | null> {
+    try {
+        const data = await fs.readFile(CONFIG_FILE, "utf-8");
+        return JSON.parse(data);
+    } catch {
+        return null;
+    }
+}