fix: not watching hidden files when triggering hot reload.

Fix incorrect page count calculation.

YaeBlog/Pages/BlogIndex.razor

@@ -39,6 +39,11 @@
     {
         _page = Page ?? 1;
         _pageCount = Contents.Count / EssaysPerPage + 1;
+        (_pageCount, int reminder) = int.DivRem(Contents.Count, EssaysPerPage);
+        if (reminder > 0)
+        {
+            _pageCount += 1;
+        }
 
         if (EssaysPerPage * _page > Contents.Count + EssaysPerPage)
         {

YaeBlog/Services/BlogHotReloadService.cs

@@ -16,11 +16,11 @@ public sealed class BlogHotReloadService(
 
         await rendererService.RenderAsync(true);
 
-        Task[] reloadTasks = [FileWatchTask(stoppingToken)];
+        Task[] reloadTasks = [WatchFileAsync(stoppingToken)];
         await Task.WhenAll(reloadTasks);
     }
 
-    private async Task FileWatchTask(CancellationToken token)
+    private async Task WatchFileAsync(CancellationToken token)
     {
         while (!token.IsCancellationRequested)
         {
@@ -33,6 +33,15 @@ public sealed class BlogHotReloadService(
                 break;
             }
 
+            FileInfo changeFileInfo = new(changeFile);
+
+            if (changeFileInfo.Name.StartsWith('.'))
+            {
+                // Ignore dot-started file and directory.
+                logger.LogDebug("Ignore hidden file: {}.", changeFile);
+                continue;
+            }
+
             logger.LogInformation("{} changed, re-rendering.", changeFile);
             essayContentService.Clear();
             await rendererService.RenderAsync(true);

YaeBlog/Services/EssayScanService.cs

@@ -109,6 +109,12 @@ public partial class EssayScanService : IEssayScanService
         {
             foreach (BlogResult blog in fileContents)
             {
+                if (blog.BlogContent.Length < 4)
+                {
+                    // Even not contains a legal header.
+                    continue;
+                }
+
                 int endPos = blog.BlogContent.IndexOf("---", 4, StringComparison.Ordinal);
                 if (!blog.BlogContent.StartsWith("---") || endPos is -1 or 0)
                 {
@@ -121,14 +127,14 @@ public partial class EssayScanService : IEssayScanService
                 try
                 {
                     MarkdownMetadata metadata = _yamlDeserializer.Deserialize<MarkdownMetadata>(metadataString);
-                    _logger.LogDebug("Scan metadata title: '{}' for {}.", metadata.Title, blog.BlogFile.Name);
+                    _logger.LogDebug("Scan metadata title: '{title}' for {name}.", metadata.Title, blog.BlogFile.Name);
 
                     contents.Add(new BlogContent(blog.BlogFile, metadata, blog.BlogContent[(endPos + 3)..], isDraft,
                         blog.Images, blog.NotFoundImages));
                 }
                 catch (YamlException e)
                 {
-                    _logger.LogWarning("Failed to parser metadata from {} due to {}, skipping", blog.BlogFile.Name, e);
+                    _logger.LogWarning("Failed to parser metadata from {name} due to {exception}, skipping", blog.BlogFile.Name, e);
                 }
             }
         });