feat: 添加内容热重载指令 (#4)

Reviewed-on: #4

LICENSE

@@ -0,0 +1,438 @@
+Attribution-NonCommercial-ShareAlike 4.0 International
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+

README.md

@@ -0,0 +1,9 @@
+# YaeBlog
+
+Ricardo Ren 的个人主页和博客仓库。
+
+主页地址：[rrricardo.top](https://rrricardo.top)
+
+博客地址：[rrricardo.top/blog/](https://rrricardo.top/blog/)
+
+欢迎各位来玩~ 未来也会添加更多有趣的功能~

YaeBlog.Core/Abstractions/IEssayContentService.cs

@@ -9,5 +9,14 @@ public interface IEssayContentService
 
     public IReadOnlyDictionary<EssayTag, List<BlogEssay>> Tags { get; }
 
+    public IReadOnlyDictionary<string, BlogHeadline> Headlines { get; }
+
+    public bool TryAddHeadline(string filename, BlogHeadline headline);
     public bool SearchByUrlEncodedTag(string tag, [NotNullWhen(true)] out List<BlogEssay>? result);
+
+    public bool TryAdd(BlogEssay essay);
+
+    public void RefreshTags();
+
+    public void Clear();
 }

YaeBlog.Core/Abstractions/IEssayScanService.cs

@@ -0,0 +1,10 @@
+using YaeBlog.Core.Models;
+
+namespace YaeBlog.Core.Abstractions;
+
+public interface IEssayScanService
+{
+    public Task<BlogContents> ScanContents();
+
+    public Task SaveBlogContent(BlogContent content, bool isDraft = true);
+}

YaeBlog.Core/Abstractions/ITableOfContentService.cs

@@ -1,8 +0,0 @@
-using YaeBlog.Core.Models;
-
-namespace YaeBlog.Core.Abstractions;
-
-public interface ITableOfContentService
-{
-    public IReadOnlyDictionary<string, BlogHeadline> Headlines { get; }
-}

YaeBlog.Core/Extensions/ServiceCollectionExtensions.cs

@@ -20,12 +20,14 @@ public static class ServiceCollectionExtensions
 
     public static IServiceCollection AddYamlParser(this IServiceCollection collection)
     {
-        DeserializerBuilder builder = new();
+        DeserializerBuilder deserializerBuilder = new();
+        deserializerBuilder.WithNamingConvention(CamelCaseNamingConvention.Instance);
+        deserializerBuilder.IgnoreUnmatchedProperties();
+        collection.AddSingleton(deserializerBuilder.Build());
 
-        builder.WithNamingConvention(CamelCaseNamingConvention.Instance);
+        SerializerBuilder serializerBuilder = new();
-        builder.IgnoreUnmatchedProperties();
+        serializerBuilder.WithNamingConvention(CamelCaseNamingConvention.Instance);
-
+        collection.AddSingleton(serializerBuilder.Build());
-        collection.AddSingleton<IDeserializer>(_ => builder.Build());
 
         return collection;
     }

YaeBlog.Core/Extensions/WebApplicationBuilderExtensions.cs

@@ -20,14 +20,9 @@ public static class WebApplicationBuilderExtensions
         builder.Services.AddMarkdig();
         builder.Services.AddYamlParser();
         builder.Services.AddSingleton<IConfiguration>(_ => Configuration.Default);
-        builder.Services.AddSingleton<EssayScanService>();
+        builder.Services.AddSingleton<IEssayScanService, EssayScanService>();
         builder.Services.AddSingleton<RendererService>();
-        builder.Services.AddSingleton<EssayContentService>();
+        builder.Services.AddSingleton<IEssayContentService, EssayContentService>();
-        builder.Services.AddSingleton<IEssayContentService, EssayContentService>(provider =>
-            provider.GetRequiredService<EssayContentService>());
-        builder.Services.AddSingleton<TableOfContentService>();
-        builder.Services.AddSingleton<ITableOfContentService, TableOfContentService>(provider =>
-            provider.GetRequiredService<TableOfContentService>());
         builder.Services.AddTransient<ImagePostRenderProcessor>();
         builder.Services.AddTransient<CodeBlockPostRenderProcessor>();
         builder.Services.AddTransient<TablePostRenderProcessor>();
@@ -35,8 +30,21 @@ public static class WebApplicationBuilderExtensions
         builder.Services.AddTransient<BlogOptions>(provider =>
             provider.GetRequiredService<IOptions<BlogOptions>>().Value);
 
+        return builder;
+    }
+
+    public static WebApplicationBuilder AddServer(this WebApplicationBuilder builder)
+    {
         builder.Services.AddHostedService<BlogHostedService>();
 
         return builder;
     }
+
+    public static WebApplicationBuilder AddWatcher(this WebApplicationBuilder builder)
+    {
+        builder.Services.AddTransient<BlogChangeWatcher>();
+        builder.Services.AddHostedService<BlogHotReloadService>();
+
+        return builder;
+    }
 }

YaeBlog.Core/Models/BlogContent.cs

@@ -4,5 +4,7 @@ public class BlogContent
 {
     public required string FileName { get; init; }
 
+    public required MarkdownMetadata Metadata { get; init; }
+
     public required string FileContent { get; set; }
 }

YaeBlog.Core/Models/BlogContents.cs

@@ -0,0 +1,10 @@
+using System.Collections.Concurrent;
+
+namespace YaeBlog.Core.Models;
+
+public sealed class BlogContents(ConcurrentBag<BlogContent> drafts, ConcurrentBag<BlogContent> posts)
+{
+    public ConcurrentBag<BlogContent> Drafts { get; } = drafts;
+
+    public ConcurrentBag<BlogContent> Posts { get; } = posts;
+}

YaeBlog.Core/Processors/HeadlinePostRenderProcessor.cs

@@ -1,14 +1,15 @@
 using AngleSharp;
 using AngleSharp.Dom;
+using Microsoft.Extensions.Logging;
 using YaeBlog.Core.Abstractions;
 using YaeBlog.Core.Models;
-using YaeBlog.Core.Services;
 
 namespace YaeBlog.Core.Processors;
 
 public class HeadlinePostRenderProcessor(
     IConfiguration angleConfiguration,
-    TableOfContentService tableOfContentService) : IPostRenderProcessor
+    IEssayContentService essayContentService,
+    ILogger<HeadlinePostRenderProcessor> logger) : IPostRenderProcessor
 {
     public async Task<BlogEssay> ProcessAsync(BlogEssay essay)
     {
@@ -62,7 +63,10 @@ public class HeadlinePostRenderProcessor(
         FindParentHeadline(topHeadline, level2List).Children.AddRange(level3List);
         topHeadline.Children.AddRange(level2List);
 
-        tableOfContentService.AddHeadline(essay.FileName, topHeadline);
+        if (!essayContentService.TryAddHeadline(essay.FileName, topHeadline))
+        {
+            logger.LogWarning("Failed to add headline of {}.", essay.FileName);
+        }
 
         return essay.WithNewHtmlContent(document.DocumentElement.OuterHtml);
     }

YaeBlog.Core/Processors/ImagePostRenderProcessor.cs

@@ -3,6 +3,7 @@ using AngleSharp.Dom;
 using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Options;
 using YaeBlog.Core.Abstractions;
+using YaeBlog.Core.Exceptions;
 using YaeBlog.Core.Models;
 
 namespace YaeBlog.Core.Processors;
@@ -47,12 +48,12 @@ public class ImagePostRenderProcessor(ILogger<ImagePostRenderProcessor> logger,
             filename = Path.Combine(essayFilename, filename);
         }
 
-        filename = Path.Combine(_options.Root, filename);
+        filename = Path.Combine(_options.Root, "posts", filename);
 
         if (!Path.Exists(filename))
         {
             logger.LogError("Failed to found image: {}.", filename);
-            throw new InvalidOperationException();
+            throw new BlogFileException($"Image {filename} doesn't exist.");
         }
 
         string imageLink = "api/files/" + filename;

YaeBlog.Core/README.md

@@ -1,5 +0,0 @@
-# YaeBlog.Core
-
-A blog generation totally based on Blazor.
-
-You can using this to create your blog all in .NET stack!

YaeBlog.Core/Services/BlogChangeWatcher.cs

@@ -0,0 +1,61 @@
+using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Options;
+using YaeBlog.Core.Models;
+
+namespace YaeBlog.Core.Services;
+
+public sealed class BlogChangeWatcher : IDisposable
+{
+    private readonly FileSystemWatcher _fileSystemWatcher;
+    private readonly ILogger<BlogChangeWatcher> _logger;
+
+    public BlogChangeWatcher(IOptions<BlogOptions> options, ILogger<BlogChangeWatcher> logger)
+    {
+        _logger = logger;
+        _fileSystemWatcher = new FileSystemWatcher(Path.Combine(Environment.CurrentDirectory, options.Value.Root));
+
+        _fileSystemWatcher.NotifyFilter = NotifyFilters.LastWrite | NotifyFilters.FileName |
+                                          NotifyFilters.DirectoryName | NotifyFilters.Size;
+        _fileSystemWatcher.IncludeSubdirectories = true;
+        _fileSystemWatcher.EnableRaisingEvents = true;
+    }
+
+    public async Task<string?> WaitForChange(CancellationToken cancellationToken = default)
+    {
+        TaskCompletionSource<string?> tcs = new();
+        cancellationToken.Register(() => tcs.TrySetResult(null));
+
+        _logger.LogDebug("Register file change handle.");
+        _fileSystemWatcher.Changed += FileChangedCallback;
+        _fileSystemWatcher.Created += FileChangedCallback;
+        _fileSystemWatcher.Deleted += FileChangedCallback;
+        _fileSystemWatcher.Renamed += FileChangedCallback;
+
+        string? result;
+        try
+        {
+            result = await tcs.Task;
+        }
+        finally
+        {
+            _logger.LogDebug("Unregister file change handle.");
+            _fileSystemWatcher.Changed -= FileChangedCallback;
+            _fileSystemWatcher.Created -= FileChangedCallback;
+            _fileSystemWatcher.Deleted -= FileChangedCallback;
+            _fileSystemWatcher.Renamed -= FileChangedCallback;
+        }
+
+        return result;
+
+        void FileChangedCallback(object _, FileSystemEventArgs e)
+        {
+            _logger.LogDebug("File {} change detected.", e.Name);
+            tcs.TrySetResult(e.Name);
+        }
+    }
+
+    public void Dispose()
+    {
+        _fileSystemWatcher.Dispose();
+    }
+}

YaeBlog.Core/Services/BlogHotReloadService.cs

@@ -0,0 +1,35 @@
+using Microsoft.Extensions.Hosting;
+using Microsoft.Extensions.Logging;
+using YaeBlog.Core.Abstractions;
+
+namespace YaeBlog.Core.Services;
+
+public sealed class BlogHotReloadService(
+    RendererService rendererService,
+    IEssayContentService essayContentService,
+    BlogChangeWatcher watcher,
+    ILogger<BlogHotReloadService> logger) : BackgroundService
+{
+    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
+    {
+        logger.LogInformation("BlogHotReloadService is starting.");
+
+        await rendererService.RenderAsync();
+
+        while (!stoppingToken.IsCancellationRequested)
+        {
+            logger.LogDebug("Watching file changes...");
+            string? changFile = await watcher.WaitForChange(stoppingToken);
+
+            if (changFile is null)
+            {
+                logger.LogInformation("BlogHotReloadService is stopping.");
+                break;
+            }
+
+            logger.LogInformation("{} changed, re-rendering.", changFile);
+            essayContentService.Clear();
+            await rendererService.RenderAsync();
+        }
+    }
+}

YaeBlog.Core/Services/EssayContentService.cs

@@ -11,12 +11,18 @@ public class EssayContentService : IEssayContentService
 
     private readonly Dictionary<EssayTag, List<BlogEssay>> _tags = [];
 
+    private readonly ConcurrentDictionary<string, BlogHeadline> _headlines = new();
+
     public bool TryAdd(BlogEssay essay) => _essays.TryAdd(essay.FileName, essay);
 
+    public bool TryAddHeadline(string filename, BlogHeadline headline) => _headlines.TryAdd(filename, headline);
+
     public IReadOnlyDictionary<string, BlogEssay> Essays => _essays;
 
     public IReadOnlyDictionary<EssayTag, List<BlogEssay>> Tags => _tags;
 
+    public IReadOnlyDictionary<string, BlogHeadline> Headlines => _headlines;
+
     public void RefreshTags()
     {
          _tags.Clear();
@@ -45,4 +51,11 @@ public class EssayContentService : IEssayContentService
 
         return result is not null;
     }
+
+    public void Clear()
+    {
+        _essays.Clear();
+        _tags.Clear();
+        _headlines.Clear();
+    }
 }

YaeBlog.Core/Services/EssayScanService.cs

@@ -1,20 +1,104 @@
 using System.Collections.Concurrent;
 using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Options;
+using YaeBlog.Core.Abstractions;
 using YaeBlog.Core.Exceptions;
 using YaeBlog.Core.Models;
+using YamlDotNet.Core;
+using YamlDotNet.Serialization;
 
 namespace YaeBlog.Core.Services;
 
 public class EssayScanService(
+    ISerializer yamlSerializer,
+    IDeserializer yamlDeserializer,
     IOptions<BlogOptions> blogOptions,
-    ILogger<EssayContentService> logger)
+    ILogger<EssayScanService> logger) : IEssayScanService
 {
     private readonly BlogOptions _blogOptions = blogOptions.Value;
 
-    public async Task<List<BlogContent>> ScanAsync()
+    public async Task<BlogContents> ScanContents()
     {
-        string root = Path.Combine(Environment.CurrentDirectory, _blogOptions.Root);
+        ValidateDirectory(_blogOptions.Root, out DirectoryInfo drafts, out DirectoryInfo posts);
+
+        return new BlogContents(
+            await ScanContentsInternal(drafts),
+            await ScanContentsInternal(posts));
+    }
+
+    public async Task SaveBlogContent(BlogContent content, bool isDraft = true)
+    {
+        ValidateDirectory(_blogOptions.Root, out DirectoryInfo drafts, out DirectoryInfo posts);
+
+        FileInfo targetFile = isDraft
+            ? new FileInfo(Path.Combine(drafts.FullName, content.FileName + ".md"))
+            : new FileInfo(Path.Combine(posts.FullName, content.FileName + ".md"));
+
+        if (targetFile.Exists)
+        {
+            logger.LogWarning("Blog {} exists, overriding.", targetFile.Name);
+        }
+
+        await using StreamWriter writer = targetFile.CreateText();
+
+        await writer.WriteAsync("---\n");
+        await writer.WriteAsync(yamlSerializer.Serialize(content.Metadata));
+        await writer.WriteAsync("---\n");
+        await writer.WriteAsync("<!--more-->\n");
+    }
+
+    private async Task<ConcurrentBag<BlogContent>> ScanContentsInternal(DirectoryInfo directory)
+    {
+        IEnumerable<FileInfo> markdownFiles = from file in directory.EnumerateFiles()
+            where file.Extension == ".md"
+            select file;
+
+        ConcurrentBag<(string, string)> fileContents = [];
+
+        await Parallel.ForEachAsync(markdownFiles, async (file, token) =>
+        {
+            using StreamReader reader = file.OpenText();
+            fileContents.Add((file.Name, await reader.ReadToEndAsync(token)));
+        });
+
+        ConcurrentBag<BlogContent> contents = [];
+
+        await Task.Run(() =>
+        {
+            foreach ((string filename, string content) in fileContents)
+            {
+                int endPos = content.IndexOf("---", 4, StringComparison.Ordinal);
+                if (!content.StartsWith("---") || endPos is -1 or 0)
+                {
+                    logger.LogWarning("Failed to parse metadata from {}, skipped.", filename);
+                    return;
+                }
+
+                string metadataString = content[4..endPos];
+
+                try
+                {
+                    MarkdownMetadata metadata = yamlDeserializer.Deserialize<MarkdownMetadata>(metadataString);
+                    logger.LogDebug("Scan metadata title: '{}' for {}.", metadata.Title, filename);
+
+                    contents.Add(new BlogContent
+                    {
+                        FileName = filename[..^3], Metadata = metadata, FileContent = content[(endPos + 3)..]
+                    });
+                }
+                catch (YamlException e)
+                {
+                    logger.LogWarning("Failed to parser metadata from {} due to {}, skipping", filename, e);
+                }
+            }
+        });
+
+        return contents;
+    }
+
+    private void ValidateDirectory(string root, out DirectoryInfo drafts, out DirectoryInfo posts)
+    {
+        root = Path.Combine(Environment.CurrentDirectory, root);
         DirectoryInfo rootDirectory = new(root);
 
         if (!rootDirectory.Exists)
@@ -22,36 +106,17 @@ public class EssayScanService(
             throw new BlogFileException($"'{root}' is not a directory.");
         }
 
-        List<FileInfo> markdownFiles = [];
+        if (rootDirectory.EnumerateDirectories().All(dir => dir.Name != "drafts"))
-
-        await Task.Run(() =>
         {
-            foreach (FileInfo fileInfo in rootDirectory.EnumerateFiles())
+            throw new BlogFileException($"'{root}/drafts' not exists.");
-            {
-                if (fileInfo.Extension != ".md")
-                {
-                    continue;
         }
 
-                logger.LogDebug("Scan markdown file: {}.", fileInfo.Name);
+        if (rootDirectory.EnumerateDirectories().All(dir => dir.Name != "posts"))
-                markdownFiles.Add(fileInfo);
-            }
-        });
-
-        ConcurrentBag<BlogContent> contents = [];
-
-        await Parallel.ForEachAsync(markdownFiles, async (info, token) =>
         {
-            StreamReader reader = new(info.OpenRead());
+            throw new BlogFileException($"'{root}/posts' not exists.");
+        }
 
-            BlogContent content = new()
+        drafts = new DirectoryInfo(Path.Combine(root, "drafts"));
-            {
+        posts = new DirectoryInfo(Path.Combine(root, "posts"));
-                FileName = info.Name.Split('.')[0], FileContent = await reader.ReadToEndAsync(token)
-            };
-
-            contents.Add(content);
-        });
-
-        return contents.ToList();
     }
 }

YaeBlog.Core/Services/RendererService.cs

@@ -7,17 +7,14 @@ using Microsoft.Extensions.Logging;
 using YaeBlog.Core.Abstractions;
 using YaeBlog.Core.Exceptions;
 using YaeBlog.Core.Models;
-using YamlDotNet.Core;
-using YamlDotNet.Serialization;
 
 namespace YaeBlog.Core.Services;
 
 public partial class RendererService(
     ILogger<RendererService> logger,
-    EssayScanService essayScanService,
+    IEssayScanService essayScanService,
     MarkdownPipeline markdownPipeline,
-    IDeserializer yamlDeserializer,
+    IEssayContentService essayContentService)
-    EssayContentService essayContentService)
 {
     private readonly Stopwatch _stopwatch = new();
 
@@ -30,30 +27,30 @@ public partial class RendererService(
         _stopwatch.Start();
         logger.LogInformation("Render essays start.");
 
-        List<BlogContent> contents = await essayScanService.ScanAsync();
+        BlogContents contents = await essayScanService.ScanContents();
-        IEnumerable<BlogContent> preProcessedContents = await PreProcess(contents);
+        List<BlogContent> posts = contents.Posts.ToList();
+        IEnumerable<BlogContent> preProcessedContents = await PreProcess(posts);
 
         List<BlogEssay> essays = [];
         await Task.Run(() =>
         {
             foreach (BlogContent content in preProcessedContents)
             {
-                MarkdownMetadata? metadata = TryParseMetadata(content);
                 uint wordCount = GetWordCount(content);
                 BlogEssay essay = new()
                 {
-                    Title = metadata?.Title ?? content.FileName,
+                    Title = content.Metadata.Title ?? content.FileName,
                     FileName = content.FileName,
                     Description = GetDescription(content),
                     WordCount = wordCount,
                     ReadTime = CalculateReadTime(wordCount),
-                    PublishTime = metadata?.Date ?? DateTime.Now,
+                    PublishTime = content.Metadata.Date ?? DateTime.Now,
                     HtmlContent = content.FileContent
                 };
 
-                if (metadata?.Tags is not null)
+                if (content.Metadata.Tags is not null)
                 {
-                    essay.Tags.AddRange(metadata.Tags);
+                    essay.Tags.AddRange(content.Metadata.Tags);
                 }
 
                 essays.Add(essay);
@@ -138,45 +135,6 @@ public partial class RendererService(
         });
     }
 
-    private MarkdownMetadata? TryParseMetadata(BlogContent content)
-    {
-        string fileContent = content.FileContent.Trim();
-
-        if (!fileContent.StartsWith("---"))
-        {
-            return null;
-        }
-
-        // 移除起始的---
-        fileContent = fileContent[3..];
-
-        int lastPos = fileContent.IndexOf("---", StringComparison.Ordinal);
-        if (lastPos is -1 or 0)
-        {
-            return null;
-        }
-
-        string yamlContent = fileContent[..lastPos];
-        // 返回去掉元数据之后的文本
-        lastPos += 3;
-        content.FileContent = fileContent[lastPos..];
-
-        try
-        {
-            MarkdownMetadata metadata =
-                yamlDeserializer.Deserialize<MarkdownMetadata>(yamlContent);
-            logger.LogDebug("Title: {}, Publish Date: {}.",
-                metadata.Title, metadata.Date);
-
-            return metadata;
-        }
-        catch (YamlException e)
-        {
-            logger.LogWarning("Failed to parse '{}' metadata: {}", yamlContent, e);
-            return null;
-        }
-    }
-
     [GeneratedRegex(@"(?<!\\)[^\#\*_\-\+\`{}\[\]!~]+")]
     private static partial Regex DescriptionPattern();
 

YaeBlog.Core/Services/TableOfContentService.cs

@@ -1,20 +0,0 @@
-using System.Collections.Concurrent;
-using YaeBlog.Core.Abstractions;
-using YaeBlog.Core.Models;
-
-namespace YaeBlog.Core.Services;
-
-public class TableOfContentService : ITableOfContentService
-{
-    private readonly ConcurrentDictionary<string, BlogHeadline> _headlines = [];
-
-    public IReadOnlyDictionary<string, BlogHeadline> Headlines => _headlines;
-
-    public void AddHeadline(string filename, BlogHeadline headline)
-    {
-        if (!_headlines.TryAdd(filename, headline))
-        {
-            throw new InvalidOperationException();
-        }
-    }
-}

YaeBlog.Core/YaeBlog.Core.csproj

@@ -6,20 +6,6 @@
     <ImplicitUsings>enable</ImplicitUsings>
   </PropertyGroup>
 
-  <PropertyGroup>
-    <PackageId>YaeBlog.Core</PackageId>
-    <Version>0.1.0</Version>
-    <Authors>Ricardo Ren</Authors>
-    <Company>Ricardo Ren</Company>
-    <PackageLicenseExpression>MIT</PackageLicenseExpression>
-    <PackageReadmeFile>README.md</PackageReadmeFile>
-  </PropertyGroup>
-
-
-  <ItemGroup>
-    <SupportedPlatform Include="browser" />
-  </ItemGroup>
-
   <ItemGroup>
     <FrameworkReference Include="Microsoft.AspNetCore.App" />
   </ItemGroup>
@@ -32,12 +18,6 @@
     <PackageReference Include="YamlDotNet" Version="13.7.1" />
   </ItemGroup>
 
-  <ItemGroup>
-    <None Include="../.gitignore" />
-    <None Include="../.editorconfig" />
-    <None Include="./README.md" Pack="true" PackagePath="/"/>
-  </ItemGroup>
-
   <ItemGroup>
     <Folder Include="wwwroot\" />
   </ItemGroup>

YaeBlog.sln

@@ -14,6 +14,15 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "workflows", "workflows", "{
 		.gitea\workflows\build.yaml = .gitea\workflows\build.yaml
 	EndProjectSection
 EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{753B998C-1B9E-498F-B949-845CE86C4075}"
+	ProjectSection(SolutionItems) = preProject
+		.editorconfig = .editorconfig
+		.gitattributes = .gitattributes
+		.gitignore = .gitignore
+		README.md = README.md
+		LICENSE = LICENSE
+	EndProjectSection
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU

YaeBlog/Commands/Binders/BlogOptionsBinder.cs

@@ -0,0 +1,36 @@
+using System.CommandLine.Binding;
+using System.Text.Json;
+using Microsoft.Extensions.Options;
+using YaeBlog.Core.Models;
+
+namespace YaeBlog.Commands.Binders;
+
+public sealed class BlogOptionsBinder : BinderBase<IOptions<BlogOptions>>
+{
+    protected override IOptions<BlogOptions> GetBoundValue(BindingContext bindingContext)
+    {
+        bindingContext.AddService<IOptions<BlogOptions>>(_ =>
+        {
+            FileInfo settings = new(Path.Combine(Environment.CurrentDirectory, "appsettings.json"));
+            if (!settings.Exists)
+            {
+                throw new InvalidOperationException("Failed to load YaeBlog configurations.");
+            }
+
+            using StreamReader reader = settings.OpenText();
+            using JsonDocument document = JsonDocument.Parse(reader.ReadToEnd());
+            JsonElement root = document.RootElement;
+            JsonElement optionSection = root.GetProperty(BlogOptions.OptionName);
+
+            BlogOptions? result = optionSection.Deserialize<BlogOptions>();
+            if (result is null)
+            {
+                throw new InvalidOperationException("Failed to load YaeBlog configuration in appsettings.json.");
+            }
+
+            return new OptionsWrapper<BlogOptions>(result);
+        });
+
+        return bindingContext.GetRequiredService<IOptions<BlogOptions>>();
+    }
+}

YaeBlog/Commands/Binders/EssayScanServiceBinder.cs

@@ -0,0 +1,32 @@
+using System.CommandLine.Binding;
+using Microsoft.Extensions.Options;
+using YaeBlog.Core.Abstractions;
+using YaeBlog.Core.Models;
+using YaeBlog.Core.Services;
+using YamlDotNet.Serialization;
+using YamlDotNet.Serialization.NamingConventions;
+
+namespace YaeBlog.Commands.Binders;
+
+public sealed class EssayScanServiceBinder : BinderBase<IEssayScanService>
+{
+    protected override IEssayScanService GetBoundValue(BindingContext bindingContext)
+    {
+        bindingContext.AddService<IEssayScanService>(provider =>
+        {
+            DeserializerBuilder deserializerBuilder = new();
+            deserializerBuilder.WithNamingConvention(CamelCaseNamingConvention.Instance);
+            deserializerBuilder.IgnoreUnmatchedProperties();
+
+            SerializerBuilder serializerBuilder = new();
+            serializerBuilder.WithNamingConvention(CamelCaseNamingConvention.Instance);
+
+            IOptions<BlogOptions> options = provider.GetRequiredService<IOptions<BlogOptions>>();
+            ILogger<EssayScanService> logger = provider.GetRequiredService<ILogger<EssayScanService>>();
+
+            return new EssayScanService(serializerBuilder.Build(), deserializerBuilder.Build(), options, logger);
+        });
+
+        return bindingContext.GetRequiredService<IEssayScanService>();
+    }
+}

YaeBlog/Commands/Binders/LoggerBinder.cs

@@ -0,0 +1,18 @@
+using System.CommandLine.Binding;
+
+namespace YaeBlog.Commands.Binders;
+
+public sealed class LoggerBinder<T> : BinderBase<ILogger<T>>
+{
+    protected override ILogger<T> GetBoundValue(BindingContext bindingContext)
+    {
+        bindingContext.AddService(_ => LoggerFactory.Create(builder => builder.AddConsole()));
+        bindingContext.AddService<ILogger<T>>(provider =>
+        {
+            ILoggerFactory factory = provider.GetRequiredService<ILoggerFactory>();
+            return factory.CreateLogger<T>();
+        });
+
+        return bindingContext.GetRequiredService<ILogger<T>>();
+    }
+}

YaeBlog/Commands/BlogOptionsBinder.cs

@@ -1,30 +0,0 @@
-using System.CommandLine.Binding;
-using System.Text.Json;
-using YaeBlog.Core.Models;
-
-namespace YaeBlog.Commands;
-
-public sealed class BlogOptionsBinder : BinderBase<BlogOptions>
-{
-    protected override BlogOptions GetBoundValue(BindingContext bindingContext)
-    {
-        FileInfo settings = new(Path.Combine(Environment.CurrentDirectory, "appsettings.json"));
-        if (!settings.Exists)
-        {
-            throw new InvalidOperationException("Failed to load YaeBlog configurations.");
-        }
-
-        using StreamReader reader = settings.OpenText();
-        using JsonDocument document = JsonDocument.Parse(reader.ReadToEnd());
-        JsonElement root = document.RootElement;
-        JsonElement optionSection = root.GetProperty(BlogOptions.OptionName);
-
-        BlogOptions? result = optionSection.Deserialize<BlogOptions>();
-        if (result is null)
-        {
-            throw new InvalidOperationException("Failed to load YaeBlog configuration in appsettings.json.");
-        }
-
-        return result;
-    }
-}

YaeBlog/Commands/CommandExtensions.cs

@@ -1,12 +1,15 @@
 using System.CommandLine;
+using YaeBlog.Commands.Binders;
 using YaeBlog.Components;
 using YaeBlog.Core.Extensions;
+using YaeBlog.Core.Models;
+using YaeBlog.Core.Services;
 
 namespace YaeBlog.Commands;
 
 public static class CommandExtensions
 {
-    public static Command AddServeCommand(this RootCommand rootCommand)
+    public static void AddServeCommand(this RootCommand rootCommand)
     {
         Command serveCommand = new("serve", "Start http server.");
         rootCommand.AddCommand(serveCommand);
@@ -20,6 +23,7 @@ public static class CommandExtensions
             builder.Services.AddControllers();
             builder.Services.AddBlazorBootstrap();
             builder.AddYaeBlog();
+            builder.AddServer();
 
             WebApplication application = builder.Build();
 
@@ -34,11 +38,40 @@ public static class CommandExtensions
             CancellationToken token = context.GetCancellationToken();
             await application.RunAsync(token);
         });
-
-        return rootCommand;
     }
 
-    public static Command AddNewCommand(this RootCommand rootCommand)
+    public static void AddWatchCommand(this RootCommand rootCommand)
+    {
+        Command command = new("watch", "Start a blog watcher that re-render when file changes.");
+        rootCommand.AddCommand(command);
+
+        command.SetHandler(async context =>
+        {
+            WebApplicationBuilder builder = WebApplication.CreateBuilder();
+
+            builder.Services.AddRazorComponents()
+                .AddInteractiveServerComponents();
+            builder.Services.AddControllers();
+            builder.Services.AddBlazorBootstrap();
+            builder.AddYaeBlog();
+            builder.AddWatcher();
+
+            WebApplication application = builder.Build();
+
+            application.UseStaticFiles();
+            application.UseAntiforgery();
+            application.UseYaeBlog();
+
+            application.MapRazorComponents<App>()
+                .AddInteractiveServerRenderMode();
+            application.MapControllers();
+
+            CancellationToken token = context.GetCancellationToken();
+            await application.RunAsync(token);
+        });
+    }
+
+    public static void AddNewCommand(this RootCommand rootCommand)
     {
         Command newCommand = new("new", "Create a new blog file and image directory.");
         rootCommand.AddCommand(newCommand);
@@ -46,45 +79,40 @@ public static class CommandExtensions
         Argument<string> filenameArgument = new(name: "blog name", description: "The created blog filename.");
         newCommand.AddArgument(filenameArgument);
 
-        newCommand.SetHandler(async (file, blogOptions) =>
+        newCommand.SetHandler(async (file, _, _, essayScanService) =>
             {
-            string fileWithExtension;
+                await essayScanService.SaveBlogContent(new BlogContent
-            if (file.EndsWith(".md"))
                 {
-                fileWithExtension = file;
+                    FileName = file,
-                file = fileWithExtension[..fileWithExtension.LastIndexOf('.')];
+                    FileContent = string.Empty,
-            }
+                    Metadata = new MarkdownMetadata { Title = file, Date = DateTime.Now }
-            else
+                });
-            {
-                fileWithExtension = file + ".md";
-            }
-
-            DirectoryInfo rootDir = new(Path.Combine(Environment.CurrentDirectory, blogOptions.Root));
-            if (!rootDir.Exists)
-            {
-                throw new InvalidOperationException($"Blog source directory '{blogOptions.Root} doesn't exist.");
-            }
-
-            if (rootDir.EnumerateFiles().Any(f => f.Name == fileWithExtension))
-            {
-                throw new InvalidOperationException($"Target blog '{file}' has been created!");
-            }
-
-            FileInfo newBlogFile = new(Path.Combine(rootDir.FullName, fileWithExtension));
-            await using StreamWriter newStream = newBlogFile.CreateText();
-
-            await newStream.WriteAsync($"""
-                                        ---
-                                        title: {file}
-                                        tags:
-                                        ---
-                                        <!--more-->
-                                        """);
 
                 Console.WriteLine($"Created new blog '{file}.");
-        }, filenameArgument, new BlogOptionsBinder());
+            }, filenameArgument, new BlogOptionsBinder(), new LoggerBinder<EssayScanService>(),
+            new EssayScanServiceBinder());
+    }
 
+    public static void AddListCommand(this RootCommand rootCommand)
+    {
+        Command command = new("list", "List all blogs");
+        rootCommand.Add(command);
 
-        return newCommand;
+        command.SetHandler(async (_, _, essyScanService) =>
+        {
+            BlogContents contents = await essyScanService.ScanContents();
+
+            Console.WriteLine($"All {contents.Posts.Count} Posts:");
+            foreach (BlogContent content in contents.Posts)
+            {
+                Console.WriteLine($" - {content.FileName}");
+            }
+
+            Console.WriteLine($"All {contents.Drafts.Count} Drafts:");
+            foreach (BlogContent content in contents.Drafts)
+            {
+                Console.WriteLine($" - {content.FileName}");
+            }
+        }, new BlogOptionsBinder(), new LoggerBinder<EssayScanService>(), new EssayScanServiceBinder());
     }
 }

YaeBlog/Pages/Essays.razor

@@ -4,7 +4,6 @@
 @using YaeBlog.Core.Models
 
 @inject IEssayContentService Contents
-@inject ITableOfContentService TableOfContent
 @inject NavigationManager NavigationInstance
 
 <PageTitle>
@@ -129,7 +128,7 @@
             NavigationInstance.NavigateTo("/NotFound");
         }
 
-        _headline = TableOfContent.Headlines[BlogKey];
+        _headline = Contents.Headlines[BlogKey];
     }
 
     private string GenerateSelectorUrl(string selectorId)

YaeBlog/Program.cs

@@ -5,5 +5,7 @@ RootCommand rootCommand = new("YaeBlog CLI");
 
 rootCommand.AddServeCommand();
 rootCommand.AddNewCommand();
+rootCommand.AddListCommand();
+rootCommand.AddWatchCommand();
 
 await rootCommand.InvokeAsync(args);

YaeBlog/source/drafts/test-essay.md

@@ -0,0 +1,6 @@
+---
+title: test-essay
+date: 2024-08-22T22:31:34.3177253+08:00
+tags: 
+---
+<!--more-->