simple default user generation

backend/src/db.rs

@@ -1,8 +1,11 @@
+use argon2::{password_hash::SaltString, Algorithm, Argon2, Params, PasswordHasher, Version};
+use rand_core::OsRng;
 use rusqlite::{Connection, Result};
 
 pub fn init_db() -> Result<Connection> {
     let conn = Connection::open("form_data.db")?;
 
+    // Create tables
     conn.execute(
         "CREATE TABLE IF NOT EXISTS forms (
             id TEXT PRIMARY KEY,
@@ -32,5 +35,29 @@ pub fn init_db() -> Result<Connection> {
         [],
     )?;
 
+    // Check if the admin_users table is empty
+    let count: i64 = conn
+        .query_row("SELECT COUNT(*) FROM admin_users", [], |row| row.get(0))
+        .unwrap_or(0);
+
+    if count == 0 {
+        // Create a default admin user
+        let default_username = "admin";
+        let default_password = "admin123"; // This should be replaced with a secure method for real applications
+
+        // Hash the default password
+        let salt = SaltString::generate(&mut OsRng);
+        let argon2 = Argon2::new(Algorithm::Argon2id, Version::V0x13, Params::default());
+        let password_hash = argon2
+            .hash_password(default_password.as_bytes(), &salt)
+            .unwrap()
+            .to_string();
+
+        conn.execute(
+            "INSERT INTO admin_users (username, password_hash) VALUES (?1, ?2)",
+            &[default_username, password_hash.as_str()],
+        )?;
+    }
+
     Ok(conn)
 }