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/** |
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* A module for the Nim game. |
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* |
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* @module |
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*/ |
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"use strict"; |
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class Nim { |
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/** |
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* @constructor |
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* |
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* @param {object} options - Configure by sending options. |
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*/ |
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constructor(options = {}) { |
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this.piles = options.piles || 3; |
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this.matches = new Array(0); |
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for (var i = 0; i < this.piles; i++) { |
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var matches = 2*i+1; |
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this.matches.push(matches); |
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} |
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this.playerOne = options.nameOfPlayerOne || "Player one"; |
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this.playerTwo = null; |
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this.playerInTurn = this.playerOne; |
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this.winner = null; |
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} |
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/** |
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* Add player two to the game. |
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* |
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* @param {string} playerName - The name of the player. |
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* |
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* @returns {boolean} true |
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*/ |
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addPlayerTwo(playerName) { |
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this.playerTwo = playerName; |
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return true; |
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} |
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/** |
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* Change the player in turn. |
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* |
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* @returns {string} Which players turn it is. |
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*/ |
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changePlayer() { |
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if (this.playerInTurn == this.playerOne) { |
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this.playerInTurn = this.playerTwo; |
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} else { |
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this.playerInTurn = this.playerOne; |
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} |
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return `It's ${this.playerInTurn} drawing matches!`; |
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} |
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/** |
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* Remove matches from a pile. |
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* |
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* @param {integer} pile - The pile where to remove the matches. |
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* @param {integer} matches - The number of matches to remove from pile. |
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* |
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* @returns {boolean} - true if possible to remove, false otherwise. |
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*/ |
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removeMatches(pile, matches) { |
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if (pile <= this.piles && pile > 0) { |
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if (this.matches[pile-1] >= matches) { |
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this.matches[pile-1] = this.matches[pile-1] - matches; |
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return true; |
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} else { |
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return false; |
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} |
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} else { |
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return false; |
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} |
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} |
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/** |
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* Check if there is a winner. |
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* |
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* @returns {boolean} True if there is a winner, false otherwise. |
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*/ |
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checkForWinner() { |
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var matchesLeft = null; |
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for (var i = 0; i < this.matches.length; i++) { |
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matchesLeft += this.matches[i]; |
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} |
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if (matchesLeft == 0) { |
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return true; |
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} else { |
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return false; |
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} |
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} |
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} |
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// Export module |
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module.exports = Nim; |
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mafd16 /
nim-core
