Listing 10.14 - Playing the game
JS Bin
// 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 Player Constructor
var Player = function (name, health) {
var newLine = spacer.newLine();
this.name = name;
this.health = health;
this.items = [];
this.place = null;
this.addItem = function (item) {
this.items.push(item);
};
this.getNameInfo = function () {
return this.name;
};
this.getHealthInfo = function () {
return this.name + " has health " + this.health;
};
this.getPlaceInfo = function () {
return this.name + " is in " + this.place.title;
};
this.getItemsInfo = function () {
var itemsString = "Items:" + newLine;
this.items.forEach(function (item, i) {
itemsString += " - " + item + newLine;
});
return itemsString;
};
this.getInfo = function (character) {
var place = this.getPlaceInfo();
var health = this.getHealthInfo();
var longest = Math.max(place.length, health.length) + 4;
var info = spacer.box(this.getNameInfo(), longest, character);
info += spacer.wrap(place, longest, character);
info += spacer.newLine() + spacer.wrap(health, longest, character);
info += newLine + spacer.line(longest, character);
info += newLine;
info += " " + this.getItemsInfo();
info += newLine;
info += spacer.line(longest, character);
info += newLine;
return info;
};
this.showInfo = function (character) {
console.log(this.getInfo(character));
};
};
// The Place Constructor
var Place = function (title, description) {
var newLine = spacer.newLine();
this.title = title;
this.description = description;
this.items = [];
this.exits = {};
this.getItemsInfo = function () {
var itemsString = "Items: " + newLine;
this.items.forEach(function (item) {
itemsString += " - " + item;
itemsString += newLine;
});
return itemsString;
};
this.getExitsInfo = function () {
var exitsString = "Exits from " + this.title;
exitsString += ":" + newLine;
Object.keys(this.exits).forEach(function (key) {
exitsString += " - " + key;
exitsString += newLine;
});
return exitsString;
};
this.getTitleInfo = function () {
return spacer.box(
this.title,
this.title.length + 4,
"="
);
};
this.getInfo = function () {
var infoString = this.getTitleInfo();
infoString += this.description;
infoString += newLine + newLine;
infoString += this.getItemsInfo() + newLine;
infoString += this.getExitsInfo();
infoString += spacer.line(40, "=") + newLine;
return infoString;
};
this.showInfo = function () {
console.log(this.getInfo());
};
this.addItem = function (item) {
this.items.push(item);
};
this.addExit = function (direction, exit) {
this.exits[direction] = exit;
};
};
// Map
var kitchen = new Place(
"The Kitchen",
"You are in a kitchen. There is a disturbing smell."
);
var library = new Place(
"The Old Library",
"You are in a library. Dusty books line the walls."
);
var garden = new Place(
"The Kitchen Garden",
"You are in a small, walled garden."
);
var cupboard = new Place(
"The Kitchen Cupboard",
"You are in a cupboard. It's surprisingly roomy."
);
kitchen.addItem("a piece of cheese");
library.addItem("a rusty key");
cupboard.addItem("a tin of spam");
kitchen.addExit("south", library);
kitchen.addExit("west", garden);
kitchen.addExit("east", cupboard);
library.addExit("north", kitchen);
garden.addExit("east", kitchen);
cupboard.addExit("west", kitchen);
// Game
var render = function () {
console.clear();
player.place.showInfo();
player.showInfo("*");
};
var go = function (direction) {
var place = player.place;
var destination = place.exits[direction];
player.place = destination;
render();
return "";
};
var get = function () {
var place = player.place;
var item = place.items.pop();
player.addItem(item);
render();
return "";
};
var player = new Player("Kandra", 50);
player.addItem("The Sword of Doom");
player.place = kitchen;
render();
