Add ability to restart the game

_config.yml

@@ -1 +0,0 @@
-theme: jekyll-theme-hacker

game_engine.coffee

@@ -4,6 +4,10 @@ class GameLog
         @content = ""
         @onChange = onChange
 
+    clear: ->
+        @content = ""
+        @onChange(this)
+
     echoInput: (text)->
         @content += "<br>&gt; " + text + "<br>"
         @onChange(this)
@@ -21,22 +25,33 @@ class GameLog
 class Inventory
 
     constructor: ->
-        @items = {}
+        @clear()
-        @length = 0
+
+    # Properties ###################################################################################
+
+    Object.defineProperties @prototype,
+        length:
+            get: -> return @_length
+
+    # Public Methods ###############################################################################
 
     add: (item)->
-        if not @items[item.name]
+        if not @_items[item.name]
-            @items[item.name] = item
+            @_items[item.name] = item
-            @length += 1
+            @_length += 1
 
     all: ->
-        return (item for name, item of @items)
+        return (item for name, item of @_items)
+
+    clear: ->
+        @_items = {}
+        @_length = 0
 
     describe: (options={})->
         options.simple ?= false
         result = []
 
-        for name, item of @items
+        for name, item of @_items
             if options.simple
                 result.push(item.name)
             else
@@ -45,16 +60,16 @@ class Inventory
         return result.join("\n")
 
     eachItem: (withItem=(->))->
-        for name, item of @items
+        for name, item of @_items
             withItem(item)
 
     has: (item)->
-        return !! @items[item.name]
+        return !! @_items[item.name]
 
     remove: (itemToRemove)->
-        if @items[itemToRemove.name]
+        if @_items[itemToRemove.name]
-            delete @items[itemToRemove.name]
+            delete @_items[itemToRemove.name]
-            @length -= 1
+            @_length -= 1
 
 
 ########################################################################################################################
@@ -96,6 +111,8 @@ class Location
         @transitions = []
         @visited = false
 
+    # Public Methods ###############################################################################
+
     addTransition: (direction, toLocation, locked=false)->
         @transitions[direction] = new Transition(direction, toLocation, locked)
 
@@ -111,6 +128,7 @@ class Location
             result.push("\n")
             result.push(@description)
 
+        console.log("@inventory.length: #{@inventory.length}")
         if @inventory.length > 0
             result.push("")
             result.push(@inventory.describe())
@@ -142,10 +160,7 @@ class ParseError extends Error
 class Parser
 
     constructor: (@story)->
-        @aliases = {}
+        @restart()
-        @directions = []
-        @verbs = {}
-        @fillerWords = new Set()
 
     addAliases: (aliasMap)->
         for alias, meaning of aliasMap
@@ -178,6 +193,12 @@ class Parser
         @_validateSentence(sentence)
         return sentence
 
+    restart: ->
+        @aliases = {}
+        @directions = []
+        @fillerWords = new Set()
+        @verbs = {}
+
     # Private Methods ##############################################################################
 
     _normalizeSentence: (sentence)->
@@ -278,9 +299,7 @@ class Player
     constructor: (@story)->
         @inventory = new Inventory()
         @onChange = (->)
-        @verbs = {}
+        @restart()
-
-        @_score = 0
 
     # Properties ###################################################################################
 
@@ -326,6 +345,12 @@ class Player
 
         @story.arrive(location)
 
+    restart: ->
+        @verbs = {}
+        @inventory.clear()
+        @score = 0
+        @_configureDefaultVerbs()
+
     take: (item)->
         localItems = @story.currentLocation.inventory
         if not item
@@ -338,13 +363,51 @@ class Player
 
             if not foundTakeableItem then @story.log.writeln("There's nothing here you can take.")
         else if localItems.has(item)
-            console.log(item)
             if item.take()
                 localItems.remove(item)
                 @inventory.add(item)
         else
             throw new ParseError("There isn't a #{item} here.")
 
+    # Private Methods ##############################################################################
+
+    _configureDefaultVerbs: ->
+        @addVerb "drop", (sentence)=>
+            if sentence.has(item: 0)
+                @drop()
+            else
+                for itemToken in sentence.tokens.item
+                    @drop(itemToken.referant)
+
+        @addVerb "go", (sentence)=>
+            if sentence.has(location: 1)
+                @move(sentence.location)
+            else
+                throw new ParseError("I'm not sure where you want to go...")
+
+        @addVerb "inventory", =>
+            if @inventory.length is 0
+                @story.log.writeln("You're not carrying anything.")
+            else
+                @story.log.writeln("You have:")
+                @story.log.writeln(@inventory.describe(simple: true))
+
+        @addVerb "look", (sentence)=>
+            if sentence.has(item: 1)
+                @story.log.writeln(sentence.item.describe(verbose: true))
+            else
+                @story.log.writeln(@story.currentLocation.describe(verbose: true))
+
+        @addVerb "restart", =>
+            @story.restart()
+
+        @addVerb "take", (sentence)=>
+            if sentence.has(item: 0)
+                @take()
+            else
+                for item in sentence.items
+                    @take(item)
+
 
 ########################################################################################################################
 
@@ -377,6 +440,8 @@ class Sentence
     Object.defineProperties @prototype,
         "item":
             get: -> return @tokens.item[0].referant
+        "items":
+            get: -> (i.referant for i in @tokens.item)
         "location":
             get: -> return @tokens.location[0].referant
         "verb":
@@ -387,18 +452,12 @@ class Sentence
 
 class Story
 
-    constructor: (@title)->
+    constructor: (@title, @onRestart=(->))->
-        @currentLocation = null
-        @items = []
-        @locations = []
         @log = new GameLog()
-        @onChange = (->)
         @parser = new Parser(this)
         @player = new Player(this)
 
-        @_turns = 0
+        @onChange = (->)
-
-        @_configure()
 
     # Properties ###################################################################################
 
@@ -434,11 +493,6 @@ class Story
 
         location.visited = true
 
-    begin: ->
-        @log.writeln(@title)
-        @log.writeln()
-        @arrive(@currentLocation)
-
     interpret: (userInput)->
         try
             @log.echoInput(userInput)
@@ -453,67 +507,31 @@ class Story
 
     # Private Methods ##############################################################################
 
-    _configure: ->
+    restart: ->
+        @currentLocation = null
+        @items = []
+        @locations = []
+        @turns = 0
+
+        @log.clear()
+        @parser.restart()
+        @player.restart()
+
         @parser.addDirections(
             "north", "northeast", "east", "southeast", "south", "southwest", "west", "northwest", "up", "down"
         )
         @parser.addFillerWords(
-            "a",
+            "a", "all", "an", "around", "at", "everything", "of", "the", "to"
-            "an",
-            "around",
-            "at",
-            "of",
-            "the",
-            "to"
         )
         @parser.addAliases({
-            "d": "down",
+            "d": "down", "e": "east", "g": "go", "i": "inventory", "l": "look", "n": "north", "ne": "northeast",
-            "e": "east",
+            "nw": "northwest", "s": "south", "se": "southeast", "sw": "southwest", "u": "up", "w": "west",
-            "everything": "all",
-            "g": "go"
-            "i": "inventory"
-            "l": "look",
-            "n": "north",
-            "ne": "northeast",
-            "nw": "northwest",
-            "s": "south",
-            "se": "southeast",
-            "sw": "southwest",
-            "u": "up",
-            "w": "west",
         })
 
-        @player.addVerb "drop", (sentence)=>
+        @onRestart()
-            if sentence.has(item: 0)
+        @log.writeln(@title)
-                @player.drop()
+        @log.writeln()
-            else
+        @arrive(@currentLocation)
-                for itemToken in sentence.tokens.item
-                    @player.drop(itemToken.referant)
-
-        @player.addVerb "go", (sentence)=>
-            if sentence.has(location: 1)
-                @player.move(sentence.location)
-            else
-                throw new ParseError("I'm not sure where you want to go...")
-
-        @player.addVerb "inventory", =>
-            if @player.inventory.length is 0
-                @log.writeln("You're not carrying anything.")
-            else
-                @log.writeln("You have:")
-                @log.writeln(@player.inventory.describe(simple: true))
-
-        @player.addVerb "look", (sentence)=>
-            if sentence.has(item: 1)
-                @log.writeln(sentence.item.describe(verbose: true))
-            else
-                @log.writeln(@currentLocation.describe(verbose: true))
-
-        @player.addVerb "take", (sentence)=>
-            if sentence.has(item: 1)
-                @player.take(sentence.item)
-            else if sentence.has(item: 0)
-                @player.take()
 
 
 ########################################################################################################################

index.html

@@ -2,14 +2,16 @@
     <link rel="stylesheet" type="text/css" href="styles.css"/>
 
     <body>
-        <div class="status">
+        <div class="game">
-            <span class="turns">&nbsp;</span>
+            <div class="status">
-            <span class="score">&nbsp;</span>
+                <span class="turns">&nbsp;</span>
+                <span class="score">&nbsp;</span>
+            </div>
+            <div class="log">
+                <p class="log-text"></p>
+            </div>
+            <input class="entry" type="text"></input>
         </div>
-        <div class="log">
-            <p class="log-text"></p>
-        </div>
-        <input class="entry" type="text"></input>
 
         <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
         <script src="https://coffeescript.org/v2/browser-compiler/coffeescript.js"></script>

run_game.coffee

@@ -33,5 +33,5 @@ $(document).ready ->
     STORY.onChange(STORY)
 
     # start the story
-    STORY.begin()
+    STORY.restart()
     $input.focus()

story.coffee

@@ -1,39 +1,43 @@
-window.STORY = s = new Story("A Walk Through My House")
+window.STORY = new Story "A Walk Through My House", ->
 
-# Items ################################################################################################################
+    # Items ################################################################################################################
 
-boxOfTile = s.addItem("box of tiles")
+    boxOfTile = @addItem "box of tiles"
-boxOfTile.description =
+    boxOfTile.description =
-    "This appears to be a box of flooring tiles. The tiles appear to be a very light color of natural stone. It is
+        "This appears to be a box of flooring tile@ The tiles appear to be a very light color of natural stone. It is
-    quite heavy."
+        quite heavy."
-boxOfTile.take = ->
+    boxOfTile.take = =>
-    s.log.writeln("Oof! It's too heavy.")
+        @log.writeln "Oof! It's too heavy."
-    return false
+        return false
 
-hose = s.addItem("garden hose")
+    car = @addItem "your car"
-hose.description = "It's a pretty ordinary garden hose about 20' long."
+    car.description =
+        "Your car isn't anything special, but it gets you from place to place."
 
-# Locations ############################################################################################################
+    hose = @addItem "garden hose"
+    hose.description = "It's a pretty ordinary garden hose about 20' long."
 
-driveway = s.addLocation("Driveway")
+    # Locations ############################################################################################################
-driveway.description =
-    "The driveway extends slightly uphill a short way to the west back to the street. At this part, it's recessed a
-    little below the level of the lawn with a stone wall defining the boundary. To the south are three garage doors
-    which make up the entire side of the house. Above the doors are a few windows.  The back yard is to the east, and
-    the some steps lead up to the front porch to the southwest."
-driveway.addItem(hose)
 
-frontPorch = s.addLocation("Front Porch")
+    driveway = @addLocation "Driveway"
-frontPorch.description =
+    driveway.description =
-    "You're standing on the front porch. It's a large wooden deck with an overhang above, and a railing all about. To
+        "The driveway extends slightly uphill a short way to the west back to the street. At this part, it's recessed a
-    the north, a staircase leads down a dozen steps or so to the driveway. To the south double door leads inside the
+        little below the level of the lawn with a stone wall defining the boundary. To the south are three garage doors
-    house. It has a fancy crystal inset in the windows, so while you can see a light on inside the house, you can't make
+        which make up the entire side of the house. Above the doors are a few windows. The back yard is to the east, and
-    out any details."
+        the some steps lead up to the front porch to the southwest."
-frontPorch.addItem(boxOfTile)
+    driveway.addItem hose
 
-# Configure Map ########################################################################################################
+    frontPorch = @addLocation "Front Porch"
+    frontPorch.description =
+        "You're standing on the front porch. It's a large wooden deck with an overhang above, and a railing all about.
+        To the north, a staircase leads down a dozen steps or so to the driveway. To the south double door leads inside
+        the house. It has a fancy crystal inset in the windows, so while you can see a light on inside the house, you
+        can't make out any details."
+    frontPorch.addItem boxOfTile
 
-driveway.addTransition("southwest", frontPorch)
+    # Configure Map ########################################################################################################
-frontPorch.addTransition("north", driveway)
 
-s.currentLocation = frontPorch
+    driveway.addTransition "southwest", frontPorch
+    frontPorch.addTransition "north", driveway
+
+    @currentLocation = frontPorch

styles.css

@@ -3,47 +3,59 @@
 }
 
 body {
-    align-items: center;
     display: flex;
+    align-items: stretch;
     font-size: 16px;
     font-family: monospace;
-    flex-direction: column;
+    height: 100%;
-    justify-content: center;
+    margin: 0;
+}
+
+html {
+    height: 100%;
 }
 
 .entry {
     background: black;
     border: none;
-    border-top: 1px solid gray;
+    border-top: 1px solid #444;
     color: green;
+    flex: 0 0 auto;
     font-family: monospace;
     font-size: 16px;
     margin: 0;
     outline: none;
     padding: 0.5em 1em;
-    width: 800px;
+}
+
+.game {
+    display: flex;
+    flex: 1 1 100%;
+    flex-direction: column;
+    align-items: stretch;
+    justify-content: stretch;
+    height: 100%;
 }
 
 .log {
     background: black;
     color: green;
-    height: 600px;
+    flex: 1 1 100%;
     overflow-y: auto;
     padding: 0.25em 1em;
-    width: 800px;
 }
 
 .status {
     background: black;
     border: none;
-    border-bottom: 1px solid gray;
+    border-bottom: 1px solid #444;
     color: green;
     display: flex;
+    flex: 0 0 auto;
     font-family: monospace;
     font-size: 16px;
     margin: 0;
     padding: 0.5em 1em;
-    width: 800px;
 }
 
 .score {