moved split check to hand

src/blackjack.rs

@@ -152,12 +152,7 @@ impl BlackjackGame {
                     return false;
                 }
 
-                if let Some(card_0) = hand.hand.get_card(0) {
+                if !hand.hand.is_valid_for_bj_split() {
-                    if let Some(card_1) = hand.hand.get_card(1) {
-                        if card_0.index.get_blackjack_value(true)
-                            != card_1.index.get_blackjack_value(true)
-                        {
-                            // Cards are not the same value
                     return false;
                 }
 
@@ -174,8 +169,6 @@ impl BlackjackGame {
 
                 player.hands.push(new_hand);
             }
-                }
-            }
             (GameState::PlayerTurn(player_index, hand_index), PlayMoves::DoubleDown) => {
                 let Some(player) = self.players.get_mut(*player_index) else {
                     // Player does not exists

src/hand.rs

@@ -40,6 +40,27 @@ impl Hand {
         self.cards.len() == 2 && self.get_blackjack_value() == 21
     }
 
+    /**
+     * Returns true if this hand could be split in a blackjack game.
+     */
+    pub fn is_valid_for_bj_split(&self) -> bool {
+        if self.cards.len() != 2 {
+            return false;
+        }
+
+        if let Some(card_0) = self.get_card(0) {
+            if let Some(card_1) = self.get_card(1) {
+                if card_0.index.get_blackjack_value(true) != card_1.index.get_blackjack_value(true)
+                {
+                    // Cards are not the same value
+                    return false;
+                }
+            }
+        }
+
+        true
+    }
+
     /**
      * Put another hand into this.
      * Leaves the other hand empty.