/* Get Programming with JavaScript

 * Listing 11.16

 * Hiding place info in the constructor

 */

​

// The spacer namespace

​

var spacer = {

  blank: function () {

    return "";

  },

​

  newLine: function () {

    return "\n";

  },

​

  line: function (length, character) {

    var longString = "****************************************";

    longString += "----------------------------------------";

    longString += "========================================";

    longString += "++++++++++++++++++++++++++++++++++++++++";

    longString += "                                        ";

​

    length = Math.max(0, length);

    length = Math.min(40, length);

    return longString.substr(longString.indexOf(character), length);

  },

  wrap : function (text, length, character) {

    var padLength = length - text.length - 3;

    var wrapText = character + " " + text;      

    wrapText += spacer.line(padLength, " ");

    wrapText += character;

    return wrapText;

  },

​

  box: function (text, length, character) {

    var boxText = spacer.newLine();

    boxText += spacer.line(length, character) + spacer.newLine();

    boxText += spacer.wrap(text, length, character) + spacer.newLine(); 

    boxText += spacer.line(length, character) + spacer.newLine();

    return boxText;

  }

};

​

​

// The Place constructor

​

var Place = function (title, description) {

    var newLine = spacer.newLine();

    var items = [];

    var exits = {};

    var getItemsInfo = function () {

        var itemsString = "Items: " + newLine;

        items.forEach(function (item) {

            itemsString += "   - " + item;

            itemsString += newLine;

        });

        return itemsString;

    };

    var getExitsInfo = function () {

        var exitsString = "Exits from " + title;

        exitsString += ":" + newLine;

        Object.keys(exits).forEach(function (key) {

            exitsString += "   - " + key;

            exitsString += newLine;

        });

        return exitsString;

    };

​

    var getTitleInfo = function () {

        return spacer.box(title, title.length + 4, "=");

    };

​

    var getInfo = function () {

        var infoString = getTitleInfo();

        infoString += description;

        infoString += newLine + newLine;

        infoString += getItemsInfo() + newLine;

        infoString += getExitsInfo();

        infoString += spacer.line(40, "=") + newLine;

        return infoString;

    };

​

    this.showInfo = function () {

        console.log(getInfo());

    };

​

    this.addItem = function (item) {

        items.push(item);

    };

    this.addExit = function (direction, exit) {

        exits[direction] = exit;

    };

​

    this.getExit = function (direction) {

        return exits[direction];

    };

    this.getLastItem = function () {

        return items.pop();

    };

};

​

​

/* Further Adventures

 *

 * 1) Add a method that lets users

 *    remove an item using its name.

 *

 *    kitchen.removeItem("a smelly cheese");

 *

 * 2) Add a method that lets users

 *    remove an item using its index.

 *

 *    kitchen.removeItemAt(2);

 *

 */