dev: 渲染服务和文件内容服务

YaeBlog.Core/Services/RendererService.cs

@@ -0,0 +1,35 @@
+using System.Collections.Concurrent;
+using Markdig;
+using Microsoft.Extensions.Logging;
+using YaeBlog.Core.Exceptions;
+using YaeBlog.Core.Models;
+
+namespace YaeBlog.Core.Services;
+
+public class RendererService(ILogger<RendererService> logger,
+    EssayScanService essayScanService,
+    MarkdownPipeline markdownPipeline,
+    EssayContentService essayContentService)
+{
+    public async Task RenderAsync()
+    {
+        List<BlogContent> contents = await essayScanService.ScanAsync();
+
+        Parallel.ForEach(contents, content =>
+        {
+            logger.LogDebug("Render markdown file {}.", content.FileName);
+            BlogEssay essay = new()
+            {
+                Title = content.FileName,
+                PublishTime = DateTime.Now,
+                HtmlContent = Markdown.ToHtml(content.FileContent, markdownPipeline)
+            };
+
+            if (!essayContentService.TryAdd(essay.Title, essay))
+            {
+                throw new BlogFileException(
+                    $"There are two essays with the same name: '{content.FileName}'.");
+            }
+        });
+    }
+}