//Given the cards already played by all players and a player's hand, determines the legal cards which can be played by the player
CardList GameLogic::legalMoves(const CardList& table, const CardList& hand) {
CardList legalMoves; // used to store legal cards
// In the case the table is empty, this means this play has 7 of spades, so he has to be forced to play it
if(table.size() == 0) {
// finds the 7S card, so we only got one instance of it
int index = hand.find(Card(SPADE, SEVEN));
const Card* sevenSpades = hand[index];
legalMoves.add(sevenSpades);
return legalMoves;
}
// loops through hand to determine which ones are legal to play
for (int index = 0; index < hand.size(); index++) {
const Card * card = hand[index];
// Stores the index of lower rank and higher rank card to determine whether it exists or not
int lowerRankIndex = -1;
int higherRankIndex = -1;
// Determines whether a lower rank or higher rank card exists
if (card->getRank() != ACE) {
Card lowerRank = Card(card->getSuit(), (Rank) (card->getRank() - 1));
lowerRankIndex = table.find(lowerRank);
}
if (card->getRank() != KING) {
Card higherRank = Card(card->getSuit(), (Rank)(card->getRank() + 1));
higherRankIndex = table.find(higherRank);
}
// Determines whether the current card is legal to play
if (card->getRank() == SEVEN || lowerRankIndex !=-1 || higherRankIndex != -1) {
legalMoves.add(card);
}
}
return legalMoves;
}
// Plays the given card in the game
void Role::playCard(const Card& card) {
const CardList legalCards = legalMoves(); // gets the card which are legal to play
// Determines whether the card being played is legal to play, otherwise exception is thrown
int cardIndex = legalCards.find(card);
if(cardIndex == -1) {
throw IllegalPlayException();
}
//Removes the card from the hand, and returns it so it can be added to the table
const Card* played = player_->hand_.remove(card);
player_->getGame()->addToTable(played);
triggerPlayerUpdate(true);
}
