Enhance tax calculation in DirectorWorker: Integrate DEFAULT_TAX_PERCENT and DEFAULT_TREASURY_USER_ID for improved financial operations during product sales.

src/worker/base.rs

@@ -17,6 +17,11 @@ pub(crate) struct WorkerState {
     pub(crate) current_step: Mutex<String>,
 }
 
+// Default tax percent and treasury user id used if no external config is available.
+// Percent, e.g. 10.0 => 10%.
+pub const DEFAULT_TAX_PERCENT: f64 = 10.0;
+pub const DEFAULT_TREASURY_USER_ID: i32 = 1;
+
 impl WorkerState {
     pub(crate) fn new(name: &str) -> Self {
         Self {

src/worker/director.rs

@@ -6,7 +6,7 @@ use std::sync::Arc;
 use std::time::{Duration, Instant};
 
 use crate::db::ConnectionPool;
-use super::base::{BaseWorker, Worker, WorkerState};
+use super::base::{BaseWorker, Worker, WorkerState, DEFAULT_TAX_PERCENT, DEFAULT_TREASURY_USER_ID};
 
 #[derive(Debug, Clone)]
 struct Director {
@@ -1001,20 +1001,51 @@ impl DirectorWorker {
         
         let sell_price = piece_sell_price * item.quantity as f64;
 
-        if let Err(err) = self.base.change_falukant_user_money(
-            item.user_id,
-            sell_price,
-            "sell products",
-        ) {
-            eprintln!(
-                "[DirectorWorker] Fehler bei change_falukant_user_money (sell products): {err}"
-            );
+        // Steuerberechnung und Auszahlung: Berechne in Cent und runde wie JS Math.round
+        let revenue_cents = (sell_price * 100.0).round() as i64;
+        // Produktionskosten nicht direkt verfügbar hier, wir approximieren profit als revenue
+        // (wenn präzisere Kosten nötig sind, kann man production_cost übergeben)
+        let cost_cents = 0i64;
+
+        let tax_percent = DEFAULT_TAX_PERCENT;
+        let profit_cents = (revenue_cents - cost_cents).max(0);
+        let tax_cents = ((profit_cents as f64) * (tax_percent / 100.0)).round() as i64;
+        let payout_cents = revenue_cents - tax_cents;
+
+        // Credit tax to treasury
+        if tax_cents > 0 {
+            let tax_amount = (tax_cents as f64) / 100.0;
+            if let Err(err) = self.base.change_falukant_user_money(
+                DEFAULT_TREASURY_USER_ID,
+                tax_amount,
+                &format!("tax from sale product {}", item.product_id),
+            ) {
+                eprintln!("[DirectorWorker] Fehler bei change_falukant_user_money (tax): {err}");
+            }
+        }
+
+        // Payout to seller
+        let payout_amount = (payout_cents as f64) / 100.0;
+        if payout_cents != 0 {
+            if let Err(err) = self.base.change_falukant_user_money(
+                item.user_id,
+                payout_amount,
+                "sell products",
+            ) {
+                eprintln!(
+                    "[DirectorWorker] Fehler bei change_falukant_user_money (sell products): {err}"
+                );
+            }
         }
 
         // Debug: Log vor dem DB-Aufruf
         eprintln!(
-            "[DirectorWorker] calling change_falukant_user_money for sell products: user_id={}, money_change={}, product_id={}",
-            item.user_id, sell_price, item.product_id
+            "[DirectorWorker] sell: user_id={}, revenue={:.2}, tax={:.2}, payout={:.2}, product_id={}",
+            item.user_id,
+            sell_price,
+            (tax_cents as f64) / 100.0,
+            payout_amount,
+            item.product_id
         );
 
         conn.execute(