Update 'README.md'

Lint mode

Ficdown.Console/Program.cs

@@ -3,7 +3,6 @@
     using System;
     using System.Linq;
     using System.IO;
-    using Microsoft.SqlServer.Server;
     using Parser;
     using Parser.Render;
     using Parser.Model.Parser;
@@ -16,8 +15,7 @@
             {
                 if(e.ExceptionObject is FicdownException)
                 {
-                    Console.ForegroundColor = ConsoleColor.Red;
+                    Console.WriteLine(e.ExceptionObject.ToString());
-                    Console.Error.WriteLine(e.ExceptionObject.ToString());
                     Environment.Exit(3);
                 }
             };
@@ -85,6 +83,14 @@
                 ShowHelp();
                 return 0;
             }
+
+            Logger.Initialize(debug);
+            var logger = Logger.GetLogger<Program>();
+
+            var lintMode = format == "lint";
+
+            if(!lintMode)
+            {
                 if (string.IsNullOrWhiteSpace(format) || string.IsNullOrWhiteSpace(infile))
                 {
                     ShowHelp();
@@ -92,7 +98,7 @@
                 }
                 if (!File.Exists(infile))
                 {
-                Console.WriteLine(@"Source file {0} not found.", infile);
+                    logger.Error($"Source file {infile} not found.");
                     return 2;
                 }
                 if (string.IsNullOrWhiteSpace(output))
@@ -100,49 +106,57 @@
                         output = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, @"html");
                     else if (format == "epub")
                         output = "output.epub";
+                    else if(format == "lint")
+                        lintMode = true;
 
                 if (!string.IsNullOrWhiteSpace(output) && (Directory.Exists(output) || File.Exists(output)))
                 {
-                Console.WriteLine(@"Specified output {0} already exists.", output);
+                    logger.Error($"Specified output {output} already exists.");
                     return 2;
                 }
                 if (!string.IsNullOrWhiteSpace(tempdir))
                 {
                     if (!Directory.Exists(tempdir))
                     {
-                    Console.WriteLine(@"Template directory {0} does not exist.", tempdir);
+                        logger.Error($"Template directory {tempdir} does not exist.");
                         return 2;
                     }
                     if (!File.Exists(Path.Combine(tempdir, "index.html")) ||
                         !File.Exists(Path.Combine(tempdir, "scene.html")) ||
                         !File.Exists(Path.Combine(tempdir, "styles.css")))
                     {
-                    Console.WriteLine(
+                        logger.Error(
                             @"Template directory must contain ""index.html"", ""scene.html"", and ""style.css"" files.");
                     }
                 }
 
                 if (!string.IsNullOrWhiteSpace(images) && !Directory.Exists(images))
                 {
-                Console.WriteLine(@"Images directory {0} does not exist.", images);
+                    logger.Error($"Images directory {images} does not exist.");
                     return 2;
                 }
+            }
 
             var parser = new FicdownParser();
-            var storyText = File.ReadAllText(infile);
 
-            Console.WriteLine(@"Parsing story...");
+            string storyText;
+            if(!lintMode)
+            {
+                storyText = File.ReadAllText(infile);
+                logger.Log(@"Parsing story...");
+            }
+            else
+            {
+                storyText = Console.In.ReadToEnd();
+            }
 
             var story = parser.ParseStory(storyText);
 
-            story.Orphans.ToList().ForEach(o =>
+            parser.Warnings.Select(w => w.ToString()).Distinct().ToList().ForEach(s => logger.Raw(s));
-            {
+            story.Orphans.ToList().ForEach(o => logger.Raw($"Warning L{o.LineNumber},1: \"{o.Name}\": Unreachable {o.Type}"));
-                var currentColor = Console.ForegroundColor;
-                Console.ForegroundColor = ConsoleColor.Yellow;
-                Console.Error.WriteLine("Warning (line {0}): {1} {2} is unreachable", o.LineNumber, o.Type, o.Name);
-                Console.ForegroundColor = currentColor;
-            });
 
+            if(!lintMode && parser.Warnings.Count() == 0)
+            {
                 IRenderer rend;
                 switch (format)
                 {
@@ -153,7 +167,7 @@
                     case "epub":
                         if (string.IsNullOrWhiteSpace(author))
                         {
-                        Console.WriteLine(@"Epub format requires the --author argument.");
+                            logger.Error(@"Epub format requires the --author argument.");
                             return 1;
                         }
                         rend = new EpubRenderer(author, bookid, language);
@@ -172,11 +186,12 @@
 
                 if (!string.IsNullOrWhiteSpace(images)) rend.ImageDir = images;
 
-            Console.WriteLine(@"Rendering story...");
+                logger.Log(@"Rendering story...");
 
                 rend.Render(story, output, debug);
 
-            Console.WriteLine(@"Done.");
+                logger.Log(@"Done.");
+            }
             return 0;
         }
 
@@ -184,7 +199,7 @@
         private static void ShowHelp()
         {
             Console.WriteLine(
-                @"Usage: ficdown.exe
+                @"Usage: ficdown
     --format (html|epub)
     --in ""/path/to/source.md""
     [--out ""/path/to/output""]
@@ -193,7 +208,9 @@
     [--author ""Author Name""]
     [--bookid ""ePub Book ID""]
     [--language ""language""]
-    [--debug]");
+    [--debug]
+or: ficdown --format lint
+    (reads input from stdin)");
         }
     }
 }

Ficdown.Parser.Tests/BlockHandlerTests.cs

@@ -4,13 +4,19 @@
     using Parser;
     using Model.Parser;
     using Extensions;
+    using System.Collections.Generic;
 
     public class BlockHandlerTests
     {
+        private BlockHandler NewBlockHandler
+        {
+            get { return new BlockHandler { Warnings = new List<FicdownException>() }; }
+        }
+
         [Fact]
         public void NoStoryBlockThrowsException()
         {
-            var bh = new BlockHandler();
+            var bh = NewBlockHandler;
             Assert.Throws<FicdownException>(() => bh.ParseBlocks(bh.ExtractBlocks(@"
 ## this file has no story
 just a lonely scene".ToLines())));
@@ -19,7 +25,7 @@ just a lonely scene".ToLines())));
         [Fact]
         public void StoryWithNoAnchorThrowsException()
         {
-            var bh = new BlockHandler();
+            var bh = NewBlockHandler;
             Assert.Throws<FicdownException>(() => bh.ParseBlocks(bh.ExtractBlocks(@"
 # my story
 doesn't link to a scene
@@ -30,17 +36,23 @@ nothing links here".ToLines())));
         [Fact]
         public void StoriesWithFancyAnchorsThrowExceptions()
         {
-            var bh = new BlockHandler();
+            var bh = NewBlockHandler;
-            Assert.Throws<FicdownException>(() => bh.ParseBlocks(bh.ExtractBlocks(@"
+            bh.ParseBlocks(bh.ExtractBlocks(@"
 # [my story](/a-scene?conditional)
 story with a conditional
 ## a scene
-this is a scene".ToLines())));
+this is a scene".ToLines()));
-            Assert.Throws<FicdownException>(() => bh.ParseBlocks(bh.ExtractBlocks(@"
+            Assert.NotEmpty(bh.Warnings);
+
+            bh = NewBlockHandler;
+            bh.ParseBlocks(bh.ExtractBlocks(@"
 # [my story](/a-scene#toggle)
 story with a toggle
 ## a scene
-this is a scene".ToLines())));
+this is a scene".ToLines()));
+            Assert.NotEmpty(bh.Warnings);
+
+            bh = NewBlockHandler;
             Assert.Throws<FicdownException>(() => bh.ParseBlocks(bh.ExtractBlocks(@"
 # [my story](/a-scene#?conditional#toggle)
 story with a conditional and a toggle
@@ -51,7 +63,7 @@ this is a scene".ToLines())));
         [Fact]
         public void StoryLinkingToNonExistentSceneThrowsException()
         {
-            var bh = new BlockHandler();
+            var bh = NewBlockHandler;
             Assert.Throws<FicdownException>(() => bh.ParseBlocks(bh.ExtractBlocks(@"
 # [a story](/non-existent)
 this story links to a first scene that doesn't exist
@@ -62,7 +74,7 @@ this scene is so cold and lonely".ToLines())));
         [Fact]
         public void StoryWithALegitAnchorParses()
         {
-            var bh = new BlockHandler();
+            var bh = NewBlockHandler;
             bh.ParseBlocks(bh.ExtractBlocks(@"
 # [my story](/a-scene)
 story with a simple link
@@ -73,8 +85,8 @@ this is a scene".ToLines()));
         [Fact]
         public void StoryWithDuplicateActionsThrowsException()
         {
-            var bh = new BlockHandler();
+            var bh = NewBlockHandler;
-            Assert.Throws<FicdownException>(() => bh.ParseBlocks(bh.ExtractBlocks(@"
+            bh.ParseBlocks(bh.ExtractBlocks(@"
 # [a story](/a-scene)
 this story is action-happy
 ## a scene
@@ -84,13 +96,14 @@ this is an action
 ## another scene
 this is another scene
 ### an action
-oops, this is the same action!".ToLines())));
+oops, this is the same action!".ToLines()));
+            Assert.NotEmpty(bh.Warnings);
         }
 
         [Fact]
         public void StoryWithScenesAndActionsParses()
         {
-            var bh = new BlockHandler();
+            var bh = NewBlockHandler;
             var story = bh.ParseBlocks(bh.ExtractBlocks(@"
 # [my story](/a-scene)
 story with a simple link

Ficdown.Parser.Tests/IntegrationTests.cs

@@ -9,6 +9,7 @@
         [Fact]
         public void CanParseValidStoryFile()
         {
+            Logger.Initialize(true);
             var parser = new FicdownParser();
             var storyText = File.ReadAllText(Path.Combine(Template.BaseDir, "TestStories", "CloakOfDarkness.md"));
             var story = parser.ParseStory(storyText);

Ficdown.Parser.Tests/UtilityTests.cs

@@ -1,36 +1,40 @@
 namespace Ficdown.Parser.Tests
 {
+    using System.Collections.Generic;
     using System.Linq;
+    using Model.Parser;
     using Parser;
     using Xunit;
 
     public class UtilityTests
     {
+        private List<FicdownException> Warnings = new List<FicdownException>();
+
         private Utilities Utilities
         {
-            get { return Utilities.GetInstance("none", 0); }
+            get { return Utilities.GetInstance(Warnings, "none", 0); }
         }
 
         [Fact]
         public void FullAnchorMatches()
         {
             var anchorStr = @"[Link text](/target-scene)";
-            var anchor = Utilities.ParseAnchor(anchorStr);
+            var anchor = Utilities.ParseAnchor(anchorStr, 0, 0);
             Assert.Equal(anchorStr, anchor.Original);
 
             anchorStr = @"[Link text](?condition-state#toggle-state ""Title text"")";
-            anchor = Utilities.ParseAnchor(anchorStr);
+            anchor = Utilities.ParseAnchor(anchorStr, 0, 0);
             Assert.Equal(anchorStr, anchor.Original);
 
             anchorStr = @"[Link text](""Title text"")";
-            anchor = Utilities.ParseAnchor(anchorStr);
+            anchor = Utilities.ParseAnchor(anchorStr, 0, 0);
             Assert.Equal(anchorStr, anchor.Original);
         }
 
         [Fact]
         public void AnchorWithTargetMatches()
         {
-            var anchor = Utilities.ParseAnchor(@"[Link text](/target-scene)");
+            var anchor = Utilities.ParseAnchor(@"[Link text](/target-scene)", 0, 0);
             Assert.Equal("Link text", anchor.Text);
             Assert.Equal("target-scene", anchor.Href.Target);
         }
@@ -38,15 +42,15 @@
         [Fact]
         public void AnchorsWithConditionsMatch()
         {
-            var anchor = Utilities.ParseAnchor(@"[Link text](?condition-state)");
+            var anchor = Utilities.ParseAnchor(@"[Link text](?condition-state)", 0, 0);
             Assert.Equal("Link text", anchor.Text);
             Assert.True(anchor.Href.Conditions["condition-state"]);
 
-            anchor = Utilities.ParseAnchor(@"[Link text](?!condition-state)");
+            anchor = Utilities.ParseAnchor(@"[Link text](?!condition-state)", 0, 0);
             Assert.Equal("Link text", anchor.Text);
             Assert.False(anchor.Href.Conditions["condition-state"]);
 
-            anchor = Utilities.ParseAnchor(@"[Link text](?condition-1&!condition-2)");
+            anchor = Utilities.ParseAnchor(@"[Link text](?condition-1&!condition-2)", 0, 0);
             Assert.Equal("Link text", anchor.Text);
             Assert.True(anchor.Href.Conditions["condition-1"]);
             Assert.False(anchor.Href.Conditions["condition-2"]);
@@ -55,15 +59,15 @@
         [Fact]
         public void AnchorsWithTogglesMatch()
         {
-            var anchor = Utilities.ParseAnchor(@"[Link text](#toggle-state)");
+            var anchor = Utilities.ParseAnchor(@"[Link text](#toggle-state)", 0, 0);
             Assert.Equal("Link text", anchor.Text);
             Assert.Equal("#toggle-state", anchor.Href.Original);
 
-            anchor = Utilities.ParseAnchor(@"[Link text](#toggle-1+toggle-2)");
+            anchor = Utilities.ParseAnchor(@"[Link text](#toggle-1+toggle-2)", 0, 0);
             Assert.Equal("Link text", anchor.Text);
             Assert.Equal("#toggle-1+toggle-2", anchor.Href.Original);
 
-            anchor = Utilities.ParseAnchor(@"[Link text](#toggle-1+toggle-2)");
+            anchor = Utilities.ParseAnchor(@"[Link text](#toggle-1+toggle-2)", 0, 0);
             Assert.Equal("Link text", anchor.Text);
             Assert.Equal("#toggle-1+toggle-2", anchor.Href.Original);
         }
@@ -71,11 +75,11 @@
         [Fact]
         public void AnchorsWithTitlesMatch()
         {
-            var anchor = Utilities.ParseAnchor(@"[Link text](""Title text"")");
+            var anchor = Utilities.ParseAnchor(@"[Link text](""Title text"")", 0, 0);
             Assert.Equal("Link text", anchor.Text);
             Assert.Equal("Title text", anchor.Title);
 
-            anchor = Utilities.ParseAnchor(@"[Talking to Kid](""Lobby"")");
+            anchor = Utilities.ParseAnchor(@"[Talking to Kid](""Lobby"")", 0, 0);
             Assert.Equal("Talking to Kid", anchor.Text);
             Assert.Equal("Lobby", anchor.Title);
         }
@@ -83,20 +87,20 @@
         [Fact]
         public void ComplexAnchorsMatch()
         {
-            var anchor = Utilities.ParseAnchor(@"[Link text](/target-scene?condition-state#toggle-state ""Title text"")");
+            var anchor = Utilities.ParseAnchor(@"[Link text](/target-scene?condition-state#toggle-state ""Title text"")", 0, 0);
             Assert.Equal("Link text", anchor.Text);
             Assert.Equal("/target-scene?condition-state#toggle-state", anchor.Href.Original);
             Assert.Equal("Title text", anchor.Title);
 
-            anchor = Utilities.ParseAnchor(@"[Link text](/target-scene#toggle-state)");
+            anchor = Utilities.ParseAnchor(@"[Link text](/target-scene#toggle-state)", 0, 0);
             Assert.Equal("Link text", anchor.Text);
             Assert.Equal("/target-scene#toggle-state", anchor.Href.Original);
 
-            anchor = Utilities.ParseAnchor(@"[Link text](/target-scene?condition-state)");
+            anchor = Utilities.ParseAnchor(@"[Link text](/target-scene?condition-state)", 0, 0);
             Assert.Equal("Link text", anchor.Text);
             Assert.Equal("/target-scene?condition-state", anchor.Href.Original);
 
-            anchor = Utilities.ParseAnchor(@"[Link text](?condition-state#toggle-state)");
+            anchor = Utilities.ParseAnchor(@"[Link text](?condition-state#toggle-state)", 0, 0);
             Assert.Equal("Link text", anchor.Text);
             Assert.Equal("?condition-state#toggle-state", anchor.Href.Original);
         }

Ficdown.Parser/FicDownParser.cs

@@ -4,6 +4,7 @@
 namespace Ficdown.Parser
 {
     using System;
+    using System.Collections.Generic;
     using System.Linq;
     using Model.Parser;
     using Parser;
@@ -11,32 +12,81 @@ namespace Ficdown.Parser
 
     public class FicdownParser
     {
+        private static Logger _logger = Logger.GetLogger<FicdownParser>();
+        public List<FicdownException> Warnings { get; private set; }
+
         private IBlockHandler _blockHandler;
         internal IBlockHandler BlockHandler
         {
-            get { return _blockHandler ?? (_blockHandler = new BlockHandler()); }
+            get
-            set { _blockHandler = value; }
+            {
+                return _blockHandler ??
+                    (_blockHandler = new BlockHandler { Warnings = Warnings });
+            }
+            set
+            {
+                _blockHandler = value;
+                _blockHandler.Warnings = Warnings;
+            }
         }
 
         private IGameTraverser _gameTraverser;
         internal IGameTraverser GameTraverser
         {
-            get { return _gameTraverser ?? (_gameTraverser = new GameTraverser()); }
+            get { return _gameTraverser ??
-            set { _gameTraverser = value; }
+                (_gameTraverser = new GameTraverser { Warnings = Warnings }); }
+            set
+            {
+                _gameTraverser = value;
+                _gameTraverser.Warnings = Warnings;
+            }
         }
 
         private IStateResolver _stateResolver;
         internal IStateResolver StateResolver
         {
-            get { return _stateResolver ?? (_stateResolver = new StateResolver()); }
+            get
-            set { _stateResolver = value; }
+            {
+                return _stateResolver ??
+                    (_stateResolver = new StateResolver { Warnings = Warnings });
+            }
+            set
+            {
+                _stateResolver = value;
+                _stateResolver.Warnings = Warnings;
+            }
+        }
+
+        public FicdownParser()
+        {
+            Warnings = new List<FicdownException>();
         }
 
         public ResolvedStory ParseStory(string storyText)
         {
             var lines = storyText.Split(new[] {"\n", "\r\n"}, StringSplitOptions.None);
+            _logger.Debug($"Parsed {lines.Length} lines.");
             var blocks = BlockHandler.ExtractBlocks(lines);
+            _logger.Debug($"Extracted {blocks.Count()} blocks.");
             var story = BlockHandler.ParseBlocks(blocks);
+            _logger.Debug("Finished initial story breakdown.");
+
+            // dupe scene sanity check
+            foreach(var key in story.Scenes.Keys)
+            {
+                foreach(var scene in story.Scenes[key])
+                {
+                    foreach(var otherScene in story.Scenes[key].Where(s => s != scene))
+                    {
+                        if((scene.Conditions == null && otherScene.Conditions == null)
+                            || (scene.Conditions != null && otherScene.Conditions != null
+                                && scene.Conditions.Count == otherScene.Conditions.Count
+                                && !scene.Conditions.Except(otherScene.Conditions).Any()))
+                            Warnings.Add(new FicdownException(scene.Name, string.Format("Scene defined again on line {0}", otherScene.LineNumber), scene.LineNumber));
+                    }
+                }
+            }
+
             GameTraverser.Story = story;
             var resolved = StateResolver.Resolve(GameTraverser.Enumerate(), story);
             resolved.Orphans = GameTraverser.OrphanedScenes.Select(o => new Orphan

Ficdown.Parser/Ficdown.Parser.csproj

@@ -12,6 +12,8 @@
   <ItemGroup>
     <PackageReference Include="Epub4Net" Version="1.2.0" />
     <PackageReference Include="Ionic.Zip" Version="1.9.1.8" />
-    <PackageReference Include="MarkdownSharp" Version="2.0.5" />
+    <PackageReference Include="Markdig" Version="0.17.1" />
+    <PackageReference Include="System.Security.Permissions" />
+    <PackageReference Include="System.Text.Encoding.CodePages" Version="4.5.1" />
   </ItemGroup>
 </Project>

Ficdown.Parser/Logger.cs

@@ -0,0 +1,63 @@
+namespace Ficdown.Parser
+{
+    using System;
+    using System.Collections.Generic;
+
+    public class Logger
+    {
+        private static bool _initialized = false;
+        private static bool _debug = false;
+        private static Dictionary<Type, Logger> _cache;
+
+        public Type Type { get; private set; }
+
+        private Logger(Type type)
+        {
+            Type = type;
+        }
+
+        public static void Initialize(bool debug)
+        {
+            _debug = debug;
+            _cache = new Dictionary<Type, Logger>();
+            _initialized = true;
+        }
+
+        public static Logger GetLogger<T>()
+        {
+            var type = typeof(T);
+            lock(_cache)
+            {
+                if(!_cache.ContainsKey(type))
+                    _cache.Add(type, new Logger(type));
+            }
+            return _cache[type];
+        }
+
+        private string Decorate(string message)
+        {
+            return $"{DateTime.Now.ToString("")} <{Type.Name}> {message}";
+        }
+
+        public void Raw(string message)
+        {
+            Console.WriteLine(message);
+        }
+
+        public void Log(string message)
+        {
+            Raw(Decorate(message));
+        }
+
+        public void Debug(string message)
+        {
+            if(!_debug) return;
+            Log($"DEBUG: {message}");
+        }
+
+        public void Error(string message, Exception ex = null)
+        {
+            Console.Error.WriteLine(Decorate($"ERROR: {message}"));
+        }
+    }
+}

Ficdown.Parser/Model/Parser/Anchor.cs

@@ -6,5 +6,7 @@
         public string Text { get; set; }
         public Href Href { get; set; }
         public string Title { get; set; }
+        public int LineNumber { get; set; }
+        public int ColNumber { get; set; }
     }
 }

Ficdown.Parser/Model/Parser/FicdownException.cs

@@ -6,24 +6,25 @@ namespace Ficdown.Parser.Model.Parser
     {
         public string BlockName { get; private set; }
         public int? LineNumber { get; private set; }
+        public int? ColNumber { get; private set; }
 
-        public FicdownException(string blockName, int? lineNumber, string message) : base(message)
+        public FicdownException(string blockName, string message, int? lineNumber = null, int? colNumber = null) : base(message)
         {
             BlockName = blockName;
             LineNumber = lineNumber;
+            ColNumber = colNumber;
         }
 
         public FicdownException(string message) : base(message) { }
 
         public override string ToString()
         {
-            return !string.IsNullOrEmpty(BlockName)
+            return string.Format("Error L{0},{1}: {2}",
-                ? string.Format("Error in block \"{0}\" (Line {1}): {2}",
+                LineNumber ?? 1,
-                    BlockName,
+                ColNumber ?? 1,
-                    LineNumber.HasValue
+                !string.IsNullOrEmpty(BlockName)
-                        ? LineNumber.ToString()
+                    ? string.Format("\"{0}\": {1}", BlockName, Message)
-                        : "unknown", Message)
+                    : Message);
-                : string.Format("Error: {0}", Message);
         }
     }
 }

Ficdown.Parser/Model/Player/PageState.cs

@@ -7,6 +7,8 @@
 
     internal class PageState
     {
+        public StateManager Manager { get; set; }
+
         public Guid Id { get; set; }
         public Scene Scene { get; set; }
         public State State { get; set; }
@@ -21,12 +23,12 @@
 
         public string UniqueHash
         {
-            get { return _uniqueHash ?? (_uniqueHash = StateManager.GetUniqueHash(State, Scene.Key)); }
+            get { return _uniqueHash ?? (_uniqueHash = Manager.GetUniqueHash(State, Scene.Key)); }
         }
 
         public string CompressedHash
         {
-            get { return _compressedHash ?? (_compressedHash = StateManager.GetCompressedHash(this)); }
+            get { return _compressedHash ?? (_compressedHash = Manager.GetCompressedHash(this)); }
         }
     }
 }

Ficdown.Parser/Model/Story/Action.cs

@@ -4,6 +4,7 @@
     {
         public int Id { get; set; }
         public string Toggle { get; set; }
+        public string RawDescription { get; set; }
         public string Description { get; set; }
         public int LineNumber { get; set; }
         public bool Visited { get; set; }

Ficdown.Parser/Model/Story/Scene.cs

@@ -8,6 +8,7 @@
         public string Name { get; set; }
         public string Key { get; set; }
         public string Description { get; set; }
+        public string RawDescription { get; set; }
         public IDictionary<string, bool> Conditions { get; set; }
         public int LineNumber { get; set; }
         public bool Visited { get; set; }

Ficdown.Parser/Parser/BlockHandler.cs

@@ -10,6 +10,8 @@
 
     internal class BlockHandler : IBlockHandler
     {
+        public List<FicdownException> Warnings { get; set; }
+
         public IEnumerable<Block> ExtractBlocks(IEnumerable<string> lines)
         {
             var blocks = new List<Block>();
@@ -45,22 +47,22 @@
         public Story ParseBlocks(IEnumerable<Block> blocks)
         {
             // get the story
-            var storyBlock = blocks.SingleOrDefault(b => b.Type == BlockType.Story);
+            var storyBlocks = blocks.Where(b => b.Type == BlockType.Story);
-            if(storyBlock == null) throw new FicdownException("No story block found");
+            if(storyBlocks.Count() == 0) throw new FicdownException("No story block found");
+            if(storyBlocks.Count() > 1) throw new FicdownException("More than one story block found");
 
-            Anchor storyAnchor;
+            var storyBlock = storyBlocks.Single();
-            try
+
+            var storyAnchor = Utilities.GetInstance(Warnings, storyBlock.Name, storyBlock.LineNumber).ParseAnchor(storyBlock.Name, storyBlock.LineNumber, 1);
+
+            if(storyAnchor == null || storyAnchor.Href == null)
             {
-                storyAnchor = Utilities.GetInstance(storyBlock.Name, storyBlock.LineNumber).ParseAnchor(storyBlock.Name);
+                throw new FicdownException(storyBlock.Name, "Story name must be an anchor pointing to the first scene", storyBlock.LineNumber);
-            }
-            catch(FicdownException ex)
-            {
-                throw new FicdownException(ex.BlockName, ex.LineNumber, "Story block must be an anchor pointing to the first scene");
             }
 
             if (storyAnchor.Href.Target == null || storyAnchor.Href.Conditions != null ||
                 storyAnchor.Href.Toggles != null)
-                throw new FicdownException(storyBlock.Name, storyBlock.LineNumber, "Story href should only have target");
+                Warnings.Add(new FicdownException(storyBlock.Name, "Story href should only have a target", storyBlock.LineNumber));
 
             var story = new Story
             {
@@ -88,11 +90,11 @@
                 var a = blocks.First(b => b.Type == BlockType.Action && blocks.Any(d => b != d && BlockToAction(b, 0).Toggle == BlockToAction(d, 0).Toggle));
                 var actionA = BlockToAction(a, a.LineNumber);
                 var dupe = blocks.First(b => b.Type == BlockType.Action && b != a && BlockToAction(b, 0).Toggle == actionA.Toggle);
-                throw new FicdownException(actionA.Toggle, actionA.LineNumber, string.Format("Action is defined again on line {0}", dupe.LineNumber));
+                Warnings.Add(new FicdownException(actionA.Toggle, string.Format("Action is defined again on line {0}", dupe.LineNumber), actionA.LineNumber));
             }
 
             if (!story.Scenes.ContainsKey(storyAnchor.Href.Target))
-                throw new FicdownException(storyBlock.Name, storyBlock.LineNumber, string.Format("Story targets non-existent scene: {0}", storyAnchor.Href.Target));
+                throw new FicdownException(storyBlock.Name, string.Format("Story links to undefined scene: {0}", storyAnchor.Href.Target), storyBlock.LineNumber);
             story.FirstScene = storyAnchor.Href.Target;
 
             return story;
@@ -105,22 +107,23 @@
             {
                 Id = id,
                 LineNumber = block.LineNumber,
+                RawDescription = string.Join("\n", block.Lines.Select(l => l.Text)),
                 Description = string.Join("\n", block.Lines.Select(l => l.Text)).Trim()
             };
 
-            try
+            Anchor sceneName;
+            if(RegexLib.Anchors.IsMatch(block.Name) && (sceneName = Utilities.GetInstance(Warnings, block.Name, block.LineNumber).ParseAnchor(block.Name, block.LineNumber, 1)).Href != null)
             {
-                var sceneName = Utilities.GetInstance(block.Name, block.LineNumber).ParseAnchor(block.Name);
                 scene.Name = sceneName.Title != null ? sceneName.Title.Trim() : sceneName.Text.Trim();
-                scene.Key = Utilities.GetInstance(block.Name, block.LineNumber).NormalizeString(sceneName.Text);
+                scene.Key = Utilities.GetInstance(Warnings, block.Name, block.LineNumber).NormalizeString(sceneName.Text);
                 if(sceneName.Href.Target != null || sceneName.Href.Toggles != null)
-                    throw new FicdownException(block.Name, block.LineNumber, string.Format("Scene href should only have conditions: {0}", block.Name));
+                    Warnings.Add(new FicdownException(block.Name, "Scene href should only have conditions", block.LineNumber));
                 scene.Conditions = sceneName.Href.Conditions;
             }
-            catch(FicdownException)
+            else
             {
                 scene.Name = block.Name.Trim();
-                scene.Key = Utilities.GetInstance(block.Name, block.LineNumber).NormalizeString(block.Name);
+                scene.Key = Utilities.GetInstance(Warnings, block.Name, block.LineNumber).NormalizeString(block.Name);
             }
 
             return scene;
@@ -131,7 +134,8 @@
             return new Action
             {
                 Id = id,
-                Toggle = Utilities.GetInstance(block.Name, block.LineNumber).NormalizeString(block.Name),
+                Toggle = Utilities.GetInstance(Warnings, block.Name, block.LineNumber).NormalizeString(block.Name),
+                RawDescription = string.Join("\n", block.Lines.Select(l => l.Text)),
                 Description = string.Join("\n", block.Lines.Select(l => l.Text)).Trim(),
                 LineNumber = block.LineNumber
             };

Ficdown.Parser/Parser/IBlockHandler.cs

@@ -6,6 +6,7 @@
 
     internal interface IBlockHandler
     {
+        List<FicdownException> Warnings { set; }
         IEnumerable<Block> ExtractBlocks(IEnumerable<string> lines);
         Story ParseBlocks(IEnumerable<Block> blocks);
     }

Ficdown.Parser/Parser/IStateResolver.cs

@@ -7,6 +7,7 @@
 
     internal interface IStateResolver
     {
+        List<FicdownException> Warnings { set; }
         ResolvedStory Resolve(IEnumerable<PageState> pages, Story story);
     }
 }

Ficdown.Parser/Parser/ParserExtensions.cs

@@ -1,6 +1,5 @@
 namespace Ficdown.Parser.Parser
 {
-    using System;
     using System.Linq;
     using System.Collections.Generic;
 

Ficdown.Parser/Parser/StateResolver.cs

@@ -10,11 +10,14 @@
 
     internal class StateResolver : IStateResolver
     {
+        private static Logger _logger = Logger.GetLogger<StateResolver>();
         private static readonly Random _random = new Random((int) DateTime.Now.Ticks);
         private readonly IDictionary<string, string> _pageNames;
         private readonly HashSet<string> _usedNames;
         private Story _story;
 
+        public List<FicdownException> Warnings { private get; set; }
+
         public StateResolver()
         {
             _pageNames = new Dictionary<string, string>();
@@ -23,6 +26,7 @@
 
         public ResolvedStory Resolve(IEnumerable<PageState> pages, Story story)
         {
+            _logger.Debug("Resolving story paths...");
             _story = story;
             return new ResolvedStory
             {
@@ -43,13 +47,16 @@
         private string ResolveAnchor(string blockName, int lineNumber, Anchor anchor, IDictionary<string, bool> playerState, string targetHash)
         {
             var text = anchor.Text;
-            if (anchor.Href.Conditions != null)
+            if (anchor.Href != null && anchor.Href.Conditions != null)
+            {
+                var satisfied = Utilities.GetInstance(Warnings, blockName, lineNumber).ConditionsMet(playerState, anchor.Href.Conditions);
+                var alts = Utilities.GetInstance(Warnings, blockName, lineNumber).ParseConditionalText(anchor);
+                if(alts != null)
                 {
-                var satisfied = Utilities.GetInstance(blockName, lineNumber).ConditionsMet(playerState, anchor.Href.Conditions);
-                var alts = Utilities.GetInstance(blockName, lineNumber).ParseConditionalText(text);
                     var replace = alts[satisfied];
                     text = RegexLib.EscapeChar.Replace(replace, string.Empty);
                 }
+            }
             return !string.IsNullOrEmpty(text) && !string.IsNullOrEmpty(targetHash)
                 ? string.Format("[{0}](/{1})", text, GetPageNameForHash(targetHash))
                 : text;
@@ -67,7 +74,7 @@
                 if (page.State.ActionsToShow[i])
                 {
                     var actionTuple = _story.Actions.Single(a => a.Value.Id == i + 1);
-                    var actionAnchors = Utilities.GetInstance(page.Scene.Name, page.Scene.LineNumber).ParseAnchors(actionTuple.Value.Description);
+                    var actionAnchors = Utilities.GetInstance(Warnings, page.Scene.Name, page.Scene.LineNumber).ParseAnchors(actionTuple.Value.RawDescription);
                     var anchorDict = GetStateDictionary(page);
                     if (
                         actionAnchors.Any(
@@ -86,7 +93,7 @@
                 }
             }
 
-            var anchors = Utilities.GetInstance(page.Scene.Name, page.Scene.LineNumber).ParseAnchors(page.Scene.Description);
+            var anchors = Utilities.GetInstance(Warnings, page.Scene.Name, page.Scene.LineNumber).ParseAnchors(page.Scene.RawDescription);
             var stateDict = GetStateDictionary(page);
             var text =
                 RegexLib.EmptyListItem.Replace(

Ficdown.Parser/Parser/Utilities.cs

@@ -1,7 +1,5 @@
-
+namespace Ficdown.Parser.Parser
-namespace Ficdown.Parser.Parser
 {
-    using System;
     using System.Collections.Generic;
     using System.Linq;
     using System.Text.RegularExpressions;
@@ -9,19 +7,32 @@ namespace Ficdown.Parser.Parser
 
     internal class Utilities
     {
-        public static Utilities GetInstance(string blockName, int lineNumber)
+        private List<FicdownException> _warnings { get; set; }
+
+        public static Utilities GetInstance()
         {
             return new Utilities
             {
+                _warnings = new List<FicdownException>(),
+                _blockName = string.Empty
+            };
+        }
+
+        public static Utilities GetInstance(List<FicdownException> warnings, string blockName, int lineNumber)
+        {
+            return new Utilities
+            {
+                _warnings = warnings,
                 _blockName = blockName,
                 _lineNumber = lineNumber
             };
         }
 
-        public static Utilities GetInstance(string blockName)
+        public static Utilities GetInstance(List<FicdownException> warnings, string blockName)
         {
             return new Utilities
             {
+                _warnings = warnings,
                 _blockName = blockName
             };
         }
@@ -34,7 +45,7 @@ namespace Ficdown.Parser.Parser
             return Regex.Replace(Regex.Replace(raw.ToLower(), @"^\W+|\W+$", string.Empty), @"\W+", "-");
         }
 
-        private Href ParseHref(string href)
+        private Href ParseHref(string href, int lineNumber, int colNumber)
         {
             var match = RegexLib.Href.Match(href);
             if (match.Success)
@@ -57,27 +68,55 @@ namespace Ficdown.Parser.Parser
                             : null
                 };
             }
-            throw new FicdownException(_blockName, _lineNumber, string.Format("Invalid href: {0}", href));
+            _warnings.Add(new FicdownException(_blockName, string.Format("Invalid href: {0}", href), lineNumber, colNumber));
+            return null;
         }
 
-        public Anchor ParseAnchor(string anchorText)
+        public Anchor ParseAnchor(string anchorText, int lineNumber, int colNumber)
         {
             var match = RegexLib.Anchors.Match(anchorText);
-            if (!match.Success) throw new FicdownException(_blockName, _lineNumber, string.Format("Invalid anchor: {0}", anchorText));
+            if (!match.Success)
-            return MatchToAnchor(match);
+            {
+                _warnings.Add(new FicdownException(_blockName, string.Format("Invalid anchor: {0}", anchorText), lineNumber, colNumber));
+                return null;
+            }
+            return MatchToAnchor(match, lineNumber, colNumber);
+        }
+
+        private void PosFromIndex(string text, int index, out int line, out int col)
+        {
+            line = 1;
+            col = 1;
+            for (int i = 0; i <= index - 1; i++)
+            {
+                col++;
+                if (text[i] == '\n')
+                {
+                    line++;
+                    col = 1;
+                }
+            }
         }
 
         public IList<Anchor> ParseAnchors(string text)
         {
             var matches = RegexLib.Anchors.Matches(text);
-            return matches.Cast<Match>().Select(MatchToAnchor).ToList();
+            return matches.Cast<Match>().Select(m =>
+            {
+                int line, col;
+                PosFromIndex(text, m.Index, out line, out col);
+                if(_lineNumber.HasValue) line += _lineNumber.Value;
+                return MatchToAnchor(m, line, col);
+            }).ToList();
         }
 
-        private Anchor MatchToAnchor(Match match)
+        private Anchor MatchToAnchor(Match match, int lineNumber, int colNumber)
         {
             var astr = match.Groups["anchor"].Value;
             var txstr = match.Groups["text"].Value;
-            var ttstr = match.Groups["title"].Value;
+            var ttstr = match.Groups["title"].Success
+                ? match.Groups["title"].Value
+                : null;
             var hrefstr = match.Groups["href"].Value;
             if (hrefstr.StartsWith(@""""))
             {
@@ -89,14 +128,21 @@ namespace Ficdown.Parser.Parser
                 Original = !string.IsNullOrEmpty(astr) ? astr : null,
                 Text = !string.IsNullOrEmpty(txstr) ? txstr : null,
                 Title = ttstr,
-                Href = ParseHref(hrefstr)
+                Href = ParseHref(hrefstr, lineNumber, colNumber),
+                LineNumber = lineNumber,
+                ColNumber = colNumber
             };
         }
 
-        public IDictionary<bool, string> ParseConditionalText(string text)
+        public IDictionary<bool, string> ParseConditionalText(Anchor anchor)
         {
-            var match = RegexLib.ConditionalText.Match(text);
+            var match = RegexLib.ConditionalText.Match(anchor.Text);
-            if (!match.Success) throw new FicdownException(_blockName, _lineNumber, string.Format(@"Invalid conditional text: {0}", text));
+            if (!match.Success)
+            {
+                _warnings.Add(new FicdownException(_blockName, string.Format(@"Invalid conditional text: {0}", anchor.Text), anchor.LineNumber, anchor.ColNumber));
+                return null;
+            }
+
             return new Dictionary<bool, string>
             {
                 {true, match.Groups["true"].Value},

Ficdown.Parser/Player/GameTraverser.cs

@@ -3,6 +3,7 @@
     using System;
     using System.Collections.Generic;
     using System.Linq;
+    using Model.Parser;
     using Model.Player;
     using Model.Story;
     using Parser;
@@ -10,6 +11,7 @@
 
     internal class GameTraverser : IGameTraverser
     {
+        private static Logger _logger = Logger.GetLogger<GameTraverser>();
         private StateManager _manager;
         private Queue<StateQueueItem> _processingQueue;
         private IDictionary<string, PageState> _processed;
@@ -17,6 +19,8 @@
         private IDictionary<int, Action> _actionMatrix;
         private bool _wasRun = false;
 
+        public List<FicdownException> Warnings { private get; set; }
+
         private Story _story;
         public Story Story
         {
@@ -25,7 +29,7 @@
             {
                 _story = value;
                 _actionMatrix = _story.Actions.ToDictionary(a => a.Value.Id, a => a.Value);
-                _manager = new StateManager(_story);
+                _manager = new StateManager(_story, Warnings);
                 _processingQueue = new Queue<StateQueueItem>();
                 _processed = new Dictionary<string, PageState>();
                 _compressed = new Dictionary<string, PageState>();
@@ -56,6 +60,7 @@
             _wasRun = true;
 
             // generate comprehensive enumeration
+            _logger.Debug("Enumerating story scenes...");
 
             var initial = _manager.InitialState;
             _processingQueue.Enqueue(new StateQueueItem
@@ -63,6 +68,7 @@
                 Page = initial,
                 AffectedStates = new List<State> {initial.AffectedState}
             });
+            var interval = 0;
             while (_processingQueue.Count > 0)
             {
                 var state = _processingQueue.Dequeue();
@@ -71,9 +77,13 @@
                     _processed.Add(state.Page.UniqueHash, state.Page);
                     ProcessState(state);
                 }
+
+                if(++interval % 100 == 0 || _processingQueue.Count == 0)
+                    _logger.Debug($"Processed {interval} scenes, {_processingQueue.Count} queued...");
             }
 
             // make sure every page gets affected data on every page that it links to
+            _logger.Debug("Processing scene links...");
             foreach (var pageTuple in _processed)
             {
                 foreach (var linkTuple in pageTuple.Value.Links)
@@ -92,6 +102,7 @@
             }
 
             // compress redundancies
+            _logger.Debug("Compressing redundant scenes...");
             foreach (var row in _processed)
             {
                 if (!_compressed.ContainsKey(row.Value.CompressedHash))
@@ -125,15 +136,15 @@
 
             var states = new HashSet<string>();
 
-            var anchors = Utilities.GetInstance(currentState.Page.Scene.Name, currentState.Page.Scene.LineNumber).ParseAnchors(currentState.Page.Scene.Description).ToList();
+            var anchors = Utilities.GetInstance(Warnings, currentState.Page.Scene.Name, currentState.Page.Scene.LineNumber).ParseAnchors(currentState.Page.Scene.RawDescription).ToList();
             foreach (var action in GetActionsForPage(currentState.Page))
             {
                 action.Visited = true;
-                anchors.AddRange(Utilities.GetInstance(action.Toggle, action.LineNumber).ParseAnchors(action.Description));
+                anchors.AddRange(Utilities.GetInstance(Warnings, action.Toggle, action.LineNumber).ParseAnchors(action.RawDescription));
             }
             var conditionals =
                 anchors.SelectMany(
-                    a => a.Href.Conditions != null ? a.Href.Conditions.Select(c => c.Key) : new string[] {})
+                    a => a.Href != null && a.Href.Conditions != null ? a.Href.Conditions.Select(c => c.Key) : new string[] {})
                     .Distinct()
                     .ToArray();
             var hasFirstSeen = RegexLib.BlockQuotes.IsMatch(currentState.Page.Scene.Description);
@@ -143,23 +154,36 @@
                 // signal to previous scenes that this scene's used conditionals are important
                 if(currentState.Page.Scene.Conditions != null)
                     foreach (var conditional in currentState.Page.Scene.Conditions)
-                        _manager.ToggleStateOn(affected, conditional.Key);
+                    {
-                foreach (var conditional in conditionals) _manager.ToggleStateOn(affected, conditional);
+                        var anchor = anchors.FirstOrDefault(a =>
+                            a.Href.Conditions != null
+                            && a.Href.Conditions.Keys.Contains(conditional.Key));
+                        _manager.ToggleStateOn(affected, conditional.Key, currentState.Page.Scene.Name, anchor != null ? anchor.LineNumber : currentState.Page.Scene.LineNumber, anchor != null ? anchor.ColNumber : 1);
+                    }
+                foreach (var conditional in conditionals)
+                {
+                    var anchor = anchors.FirstOrDefault(a =>
+                        a.Href.Conditions != null
+                        && a.Href.Conditions.Keys.Contains(conditional));
+                    _manager.ToggleStateOn(affected, conditional, currentState.Page.Scene.Name, anchor != null ? anchor.LineNumber : currentState.Page.Scene.LineNumber, anchor != null ? anchor.ColNumber : 1);
+                }
 
                 // signal to previous scenes if this scene has first-seen text
                 if (hasFirstSeen) _manager.ToggleSeenSceneOn(affected, currentState.Page.Scene.Id);
             }
 
-            foreach (var anchor in anchors.Where(a => a.Href.Target != null || a.Href.Toggles != null))
+            foreach (var anchor in anchors.Where(a => a.Href != null && (a.Href.Target != null || a.Href.Toggles != null)))
             {
                 // don't follow links that would be hidden
                 if (anchor.Href.Conditions != null &&
                     string.IsNullOrEmpty(
-                        Utilities.GetInstance(currentState.Page.Scene.Name, currentState.Page.Scene.LineNumber).ParseConditionalText(anchor.Text)[
+                        Utilities.GetInstance(Warnings, currentState.Page.Scene.Name, currentState.Page.Scene.LineNumber).ParseConditionalText(anchor)[
-                            Utilities.GetInstance(currentState.Page.Scene.Name, currentState.Page.Scene.LineNumber).ConditionsMet(StateResolver.GetStateDictionary(currentState.Page),
+                            Utilities.GetInstance(Warnings, currentState.Page.Scene.Name, currentState.Page.Scene.LineNumber).ConditionsMet(StateResolver.GetStateDictionary(currentState.Page),
                                 anchor.Href.Conditions)])) continue;
 
                 var newState = _manager.ResolveNewState(anchor, currentState.Page);
+                if(newState.Scene != null)
+                {
                     if (!currentState.Page.Links.ContainsKey(anchor.Original))
                         currentState.Page.Links.Add(anchor.Original, newState.UniqueHash);
 
@@ -174,3 +198,4 @@
             }
         }
     }
+}

Ficdown.Parser/Player/IGameTraverser.cs

@@ -1,11 +1,13 @@
 namespace Ficdown.Parser.Player
 {
     using System.Collections.Generic;
+    using Model.Parser;
     using Model.Player;
     using Model.Story;
 
     internal interface IGameTraverser
     {
+        List<FicdownException> Warnings { set; }
         Story Story { get; set; }
         IEnumerable<PageState> Enumerate();
         IEnumerable<Scene> OrphanedScenes { get; }

Ficdown.Parser/Player/StateManager.cs

@@ -11,16 +11,33 @@
 
     internal class StateManager
     {
+        private static Logger _logger = Logger.GetLogger<StateManager>();
         private readonly Story _story;
         private readonly Dictionary<string, int> _stateMatrix;
         private readonly int _sceneCount;
         private readonly int _actionCount;
+        private BitArray _scenesSeenMask;
 
-        public StateManager(Story story)
+        private List<FicdownException> _warnings { get; set; }
+
+        public StateManager(Story story, List<FicdownException> warnings)
         {
+            _warnings = warnings;
             _story = story;
             var allScenes = _story.Scenes.SelectMany(s => s.Value);
             _sceneCount = allScenes.Max(s => s.Id);
+            _scenesSeenMask = new BitArray(_sceneCount);
+
+            // figure out which scenes can affect state
+            var masked = 0;
+            foreach(var scene in allScenes)
+            {
+                if(Utilities.GetInstance().ParseAnchors(scene.RawDescription).Any(a => a.Href.Toggles != null) || RegexLib.BlockQuotes.IsMatch(scene.RawDescription))
+                {
+                    _scenesSeenMask[scene.Id - 1] = true;
+                    masked++;
+                }
+            }
             _actionCount = _story.Actions.Count > 0 ? _story.Actions.Max(a => a.Value.Id) : 0;
             _stateMatrix = new Dictionary<string, int>();
             var state = 0;
@@ -28,23 +45,34 @@
                 var toggle in
                     allScenes.SelectMany(
                         sc =>
-                            Utilities.GetInstance(sc.Name, sc.LineNumber).ParseAnchors(sc.Description)
+                            Utilities.GetInstance(_warnings, sc.Name, sc.LineNumber).ParseAnchors(sc.RawDescription)
                                 .SelectMany(
                                     a =>
-                                        a.Href.Toggles != null
+                                        a.Href != null && a.Href.Toggles != null
                                             ? a.Href.Toggles.Where(t => !_stateMatrix.ContainsKey(t))
                                             : new string[] {})))
             {
                 _stateMatrix.Add(toggle, state++);
             }
+            _logger.Debug($"{_sceneCount} scenes ({masked} can change state).");
+            _logger.Debug($"{_actionCount} actions.");
+            _logger.Debug($"{_stateMatrix.Count()} states.");
         }
 
         public PageState InitialState
         {
             get
             {
+                var scene = _story.Scenes[_story.FirstScene].Where(s => s.Conditions == null);
+                if(scene.Count()  == 0)
+                    throw new FicdownException(_story.Name, string.Format("Story links to undefined scene: {0}", _story.FirstScene));
+                if(scene.Count() > 1)
+                    _warnings.Add(new FicdownException(_story.Name, string.Format("Story links to scene that is defined more than once: {0}", _story.FirstScene)));
+
                 return new PageState
                 {
+                    Manager = this,
+
                     Id = Guid.Empty,
                     Links = new Dictionary<string, string>(),
                     State = new State
@@ -61,7 +89,7 @@
                         ActionsToShow = new BitArray(_actionCount),
                         ActionFirstToggles = null
                     },
-                    Scene = _story.Scenes[_story.FirstScene].Single(s => s.Conditions == null),
+                    Scene = scene.First(),
                     StateMatrix = _stateMatrix
                 };
             }
@@ -83,7 +111,7 @@
                         if(actionFirstToggles == null) actionFirstToggles = new List<bool>();
                         newState.State.ActionsToShow[_story.Actions[toggle].Id - 1] = true;
                         if (
-                            Utilities.GetInstance(_story.Actions[toggle].Toggle, _story.Actions[toggle].LineNumber).ParseAnchors(_story.Actions[toggle].Description)
+                            Utilities.GetInstance(_warnings, _story.Actions[toggle].Toggle, _story.Actions[toggle].LineNumber).ParseAnchors(_story.Actions[toggle].RawDescription)
                                 .Any(a => a.Href.Conditions != null && a.Href.Conditions.ContainsKey(toggle)))
                             actionFirstToggles.Add(!current.State.PlayerState[_stateMatrix[toggle]]);
                     }
@@ -93,13 +121,16 @@
             newState.State.ActionFirstToggles = actionFirstToggles != null
                 ? new BitArray(actionFirstToggles.ToArray())
                 : null;
-            newState.Scene = GetScene(current.Scene.Name, current.Scene.LineNumber, target, newState.State.PlayerState);
+            newState.Scene = GetScene(current.Scene.Name, anchor, target, newState.State.PlayerState);
             return newState;
         }
 
-        public void ToggleStateOn(State state, string toggle)
+        public void ToggleStateOn(State state, string toggle, string blockName, int lineNumber, int colNumber)
         {
+            if(_stateMatrix.ContainsKey(toggle))
                 state.PlayerState[_stateMatrix[toggle]] = true;
+            else
+                _warnings.Add(new FicdownException(blockName, string.Format("Conditional for undefined state: {0}", toggle), lineNumber, colNumber));
         }
 
         public void ToggleSeenSceneOn(State state, int sceneId)
@@ -107,14 +138,14 @@
             state.ScenesSeen[sceneId - 1] = true;
         }
 
-        public static string GetUniqueHash(State state, string sceneKey)
+        public string GetUniqueHash(State state, string sceneKey)
         {
             var combined =
                 new bool[
                     state.PlayerState.Count + state.ScenesSeen.Count + state.ActionsToShow.Count +
                     (state.ActionFirstToggles != null ? state.ActionFirstToggles.Count : 0)];
             state.PlayerState.CopyTo(combined, 0);
-            state.ScenesSeen.CopyTo(combined, state.PlayerState.Count);
+            state.ScenesSeen.And(_scenesSeenMask).CopyTo(combined, state.PlayerState.Count);
             state.ActionsToShow.CopyTo(combined, state.PlayerState.Count + state.ScenesSeen.Count);
             if (state.ActionFirstToggles != null)
                 state.ActionFirstToggles.CopyTo(combined,
@@ -122,11 +153,15 @@
             var ba = new BitArray(combined);
             var byteSize = (int)Math.Ceiling(combined.Length / 8.0);
             var encoded = new byte[byteSize];
+            for(var i = 0; i < byteSize; i++)
+            {
+                encoded[i] = 0;
+            }
             ba.CopyTo(encoded, 0);
             return string.Format("{0}=={1}", sceneKey, Convert.ToBase64String(encoded));
         }
 
-        public static string GetCompressedHash(PageState page)
+        public string GetCompressedHash(PageState page)
         {
             var compressed = new State
             {
@@ -138,40 +173,45 @@
             return GetUniqueHash(compressed, page.Scene.Key);
         }
 
-        private Scene GetScene(string blockName, int lineNumber, string target, BitArray playerState)
+        private Scene GetScene(string blockName, Anchor anchor, string target, BitArray playerState)
+        {
+            if (_story.Scenes.ContainsKey(target))
             {
-            if (!_story.Scenes.ContainsKey(target))
-                throw new FicdownException(blockName, lineNumber, string.Format("Encountered link to non-existent scene: {0}", target));
-
                 Scene newScene = null;
                 foreach (var scene in _story.Scenes[target])
                 {
                     if (ConditionsMatch(scene, playerState) &&
                         (newScene == null || newScene.Conditions == null ||
-                     scene.Conditions.Count > newScene.Conditions.Count))
+                         (scene.Conditions != null && scene.Conditions.Count > newScene.Conditions.Count)))
                     {
                         newScene = scene;
                     }
                 }
                 if (newScene == null)
-                throw new FicdownException(blockName, lineNumber, string.Format("Scene {0} reached with unmatched player state", target));
+                    _warnings.Add(new FicdownException(blockName, string.Format("Link to scene that is undefined for conditionals: {0}", target), anchor.LineNumber, anchor.ColNumber));
                 return newScene;
             }
+            _warnings.Add(new FicdownException(blockName, string.Format("Link to undefined scene: {0}", target), anchor.LineNumber, anchor.ColNumber));
+            return null;
+        }
 
         private bool ConditionsMatch(Scene scene, BitArray playerState)
         {
             if (scene.Conditions == null) return true;
             scene.Conditions.ToList().ForEach(c =>
             {
-                if(!_stateMatrix.ContainsKey(c.Key)) throw new FicdownException(scene.Name, scene.LineNumber, string.Format("Reference to non-existent state: {0}", c.Key));
+                if(!_stateMatrix.ContainsKey(c.Key))
+                    _warnings.Add(new FicdownException(scene.Name, string.Format("Conditional for undefined state: {0}", c.Key), scene.LineNumber));
             });
-            return scene.Conditions.All(c => playerState[_stateMatrix[c.Key]] == c.Value);
+            return scene.Conditions.Where(c => _stateMatrix.ContainsKey(c.Key)).All(c => playerState[_stateMatrix[c.Key]] == c.Value);
         }
 
         private PageState ClonePage(PageState page)
         {
             return new PageState
             {
+                Manager = this,
+
                 Id = Guid.NewGuid(),
                 Links = new Dictionary<string, string>(),
                 State = new State

Ficdown.Parser/Render/EpubRenderer.cs

@@ -89,6 +89,7 @@
 
     public class EpubRenderer : HtmlRenderer
     {
+        private static readonly Logger _logger = Logger.GetLogger<EpubRenderer>();
         private readonly string _author;
         private readonly string _bookId;
         private readonly string _language;
@@ -98,10 +99,12 @@
             _author = author;
             _bookId = bookId ?? Guid.NewGuid().ToString("D");
             _language = language ?? "en";
+            Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);
         }
 
         public override void Render(Model.Parser.ResolvedStory story, string outPath, bool debug = false)
         {
+            _logger.Debug("Generating epub...");
             var temppath = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString());
             Directory.CreateDirectory(temppath);
             base.Render(story, temppath, debug);

Ficdown.Parser/Render/HtmlRenderer.cs

@@ -3,15 +3,16 @@
     using System.Collections.Generic;
     using System.IO;
     using System.Linq;
-    using MarkdownSharp;
+    using Markdig;
     using Model.Parser;
     using Parser;
 
     public class HtmlRenderer : IRenderer
     {
+        private static Logger _logger = Logger.GetLogger<HtmlRenderer>();
         private readonly string _language;
 
-        protected readonly Markdown Markdown;
+        public List<FicdownException> Warnings { private get; set; }
 
         public string IndexTemplate { get; set; }
         public string SceneTemplate { get; set; }
@@ -23,7 +24,6 @@
         public HtmlRenderer(string language)
         {
             _language = language;
-            Markdown = new Markdown();
         }
 
         public virtual void Render(ResolvedStory story, string outPath, bool debug = false)
@@ -40,11 +40,12 @@
 
         protected void GenerateHtml(ResolvedStory story, string outPath, bool debug)
         {
+            _logger.Debug("Generating HTML...");
             var index = FillTemplate(IndexTemplate ?? Template.Index, new Dictionary<string, string>
             {
                 {"Language", _language},
                 {"Title", story.Name},
-                {"Description", Markdown.Transform(story.Description)},
+                {"Description", Markdown.ToHtml(story.Description)},
                 {"FirstScene", string.Format("{0}.html", story.FirstPage)}
             });
 
@@ -55,7 +56,7 @@
                 File.WriteAllText(Path.Combine(outPath, "styles.css"), StylesTemplate ?? Template.Styles);
 
                 var content = page.Content;
-                foreach (var anchor in Utilities.GetInstance(page.Name).ParseAnchors(page.Content))
+                foreach (var anchor in Utilities.GetInstance(Warnings, page.Name).ParseAnchors(page.Content))
                 {
                     var newAnchor = string.Format("[{0}]({1}.html)", anchor.Text, anchor.Href.Target);
                     content = content.Replace(anchor.Original, newAnchor);
@@ -70,7 +71,7 @@
                 {
                     {"Language", _language},
                     {"Title", story.Name},
-                    {"Content", Markdown.Transform(content)}
+                    {"Content", Markdown.ToHtml(content)}
                 });
 
                 File.WriteAllText(Path.Combine(outPath, string.Format("{0}.html", page.Name)), scene);

Ficdown.Parser/Render/IRenderer.cs

@@ -1,10 +1,11 @@
 namespace Ficdown.Parser.Render
 {
-    using System.Security.Cryptography.X509Certificates;
+    using System.Collections.Generic;
     using Model.Parser;
 
     public interface IRenderer
     {
+        List<FicdownException> Warnings { set; }
         string IndexTemplate { get; set; }
         string SceneTemplate { get; set; }
         string StylesTemplate { get; set; }

LICENSE.txt

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2020 Rudis Muiznieks
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

Makefile

@@ -10,6 +10,7 @@ test:
 	dotnet test Ficdown.Parser.Tests
 
 publish: clean
+	rm -rf /tmp/ficdown*
 	dotnet publish --self-contained -c Release -r linux-x64 Ficdown.Console
 	tar -C Ficdown.Console/bin/Release/netcoreapp2.1/linux-x64/publish -cvzf /tmp/ficdown-linux64.tar.gz .
 	dotnet publish --self-contained -c Release -r win-x64 Ficdown.Console

README.md

@@ -1,6 +1,6 @@
 # Ficdown
 
-Ficdown is a system for building interactive fiction using MarkDown syntax. See [Ficdown.com](http://www.ficdown.com) for more information.
+Ficdown is a system for building interactive fiction using MarkDown syntax.
 
 This project contains the core Ficdown library for parsing Ficdown stories, as well as a console application that can be used to generate HTML or epub ebook formats.
 
@@ -10,7 +10,7 @@ Ficdown is written using .NET Core and should run on Windows, Linux, and OSX wit
 
 ## Obtaining
 
-If you want to use Ficdown to convert your stories into ebooks, download the latest version from the [releases](https://github.com/rudism/Ficdown/releases) page and decompress it somewhere on your hard drive. Ficdown does not include an installer, the application and all of its dependencies are included directly in the zip archive.
+If you want to use Ficdown to convert your stories into ebooks, download the latest version from the [releases](https://code.sitosis.com/rudism/ficdown/releases) page and decompress it somewhere on your hard drive. Ficdown does not include an installer, the application and all of its dependencies are included directly in the zip archive.
 
 ## Usage
 
@@ -29,8 +29,8 @@ The pre-built releases are self-contained .NET Core deployments, so you should b
 Running ficdown.exe without any arguments will produce the following help text:
 
     Usage: ficdown.exe
-        --format (html|epub)
+        --format (html|epub|lint)
-        --in "/path/to/source.md"
+        --in "/path/to/source.md" (lint reads stdin)
         [--out "/path/to/output"]
         [--template "/path/to/template/dir"]
         [--images "/path/to/images/dir"]
@@ -85,6 +85,10 @@ If you pass this option, all of the pages in your story will include output at t
 
 To generate other formats than HTML or epub, you will have to use third party tools. [Calibre](http://www.calibre-ebook.com) is a popular ebook management suite that includes the ability to convert books from almost any format to any other format. Also, Amazon has an official tool called [KindleGen](http://www.amazon.com/gp/feature.html?docId=1000765211) that you can use to convert your epub to a format that can be read on Kindles.
 
-### Interactive Website
+## Additional Tools
 
-Ficdown stories can be played interactively in a web browser without even requiring the command line utility here. See [Ficdown.js](https://github.com/rudism/Ficdown.js) for a Javascript Ficdown parser and interpreter that you can include on your own website to present your Ficdown stories.
+- Ficdown stories can be played interactively in a web browser without even requiring the command line utility here. See [Ficdown.js](https://code.sitosis.com/rudism/ficdown.js) for a Javascript Ficdown parser and interpreter that you can include on your own website to present your Ficdown stories.
+
+- [Ficdown-editor](https://byfernanz.github.io/ficdown-editor/) is a web-based GUI for writing Ficdown.
+
+- [Prop](https://github.com/ByFernanz/prop) is a YAML-header style preprocessor for Ficdown