added Response sell()

Author: BarTes8

shm/inc/Store.hpp

@@ -10,6 +10,7 @@ class Player;
 
 constexpr size_t MIN_CARGO_IN_STORE{ 0 };
 constexpr size_t MAX_CARGO_IN_STORE{ 100 };
+constexpr size_t STORE_CAPACITY = 1000;
 
 class Store : public Subscriber {
 public:

shm/src/Store.cpp

@@ -18,6 +18,13 @@ Store::Response Store::buy(Cargo* cargo, size_t amount, Player* player) {
     return Response::done;   
 }
 
+Store::Response Store::sell(Cargo* cargo, size_t amount, Player* player) {
+    if (cargo->getAmount() + amount > Store::STORE_CAPACITY) {
+        return Response::lack_of_space;
+    }
+    return Response::done;
+}
+
 void Store::nextDay() {
     std::mt19937 generator(std::random_device{}());
     std::uniform_int_distribution<size_t> distribution{