Added the blackjack lib

blackjack/Player.cpp

@@ -0,0 +1,48 @@
+#include "Player.hpp"
+
+void Player::addCard(std::unique_ptr<Card> card)
+{
+    hand_.push_back(std::move(card));
+}
+
+Card Player::getLastCard(void) const
+{
+    return Card(hand_.back()->getRank(), hand_.back()->getSuit());
+}
+
+int Player::getHandValue() const
+{
+    int value = 0;
+    int aces = 0;
+    for (const auto &card : hand_)
+    {
+        int cardValue = (int)card->getRank();
+        if (cardValue >= 10)
+        {
+            cardValue = 10;
+        }
+        else if (cardValue == (int)Card::Rank::ACE)
+        {
+            aces++;
+            cardValue = 11;
+        }
+        value += cardValue;
+    }
+
+    while (value > 21 && aces > 0)
+    {
+        value -= 10;
+        aces--;
+    }
+    return value;
+}
+
+std::string Player::getHandString() const
+{
+    std::string handString;
+    for (const auto &card : hand_)
+    {
+        handString += card->to_string() + " ";
+    }
+    return handString;
+}