feat: Auto translate url in markdown post.

5 files changed, 74 insertions, 2 deletions

diff --git a/BackEnd/Timeline/Controllers/TimelinePostController.cs b/BackEnd/Timeline/Controllers/TimelinePostController.cs
index 4026d551..86c5c8cf 100644
--- a/BackEnd/Timeline/Controllers/TimelinePostController.cs
+++ b/BackEnd/Timeline/Controllers/TimelinePostController.cs
@@ -32,14 +32,17 @@ namespace Timeline.Controllers
 

         private readonly TimelineMapper _timelineMapper;

 

+        private readonly MarkdownProcessor _markdownProcessor;

+

         /// <summary>

         /// 

         /// </summary>

-        public TimelinePostController(ITimelineService timelineService, ITimelinePostService timelinePostService, TimelineMapper timelineMapper)

+        public TimelinePostController(ITimelineService timelineService, ITimelinePostService timelinePostService, TimelineMapper timelineMapper, MarkdownProcessor markdownProcessor)

         {

             _timelineService = timelineService;

             _postService = timelinePostService;

             _timelineMapper = timelineMapper;

+            _markdownProcessor = markdownProcessor;

         }

 

         private bool UserHasAllTimelineManagementPermission => this.UserHasPermission(UserPermission.AllTimelineManagement);

@@ -147,7 +150,15 @@ namespace Timeline.Controllers
 

             return await DataCacheHelper.GenerateActionResult(this,

                 () => _postService.GetPostDataDigest(timelineId, post, dataIndex),

-                () => _postService.GetPostData(timelineId, post, dataIndex)

+                async () =>

+                {

+                    var data = await _postService.GetPostData(timelineId, post, dataIndex);

+                    if (data.ContentType == MimeTypes.TextMarkdown)

+                    {

+                        return new ByteData(_markdownProcessor.Process(data.Data, Url, timeline, post), data.ContentType);

+                    }

+                    return data;

+                }

             );

         }

 

diff --git a/BackEnd/Timeline/Services/MarkdownProcessor.cs b/BackEnd/Timeline/Services/MarkdownProcessor.cs
new file mode 100644
index 00000000..f34432cd
--- /dev/null
+++ b/BackEnd/Timeline/Services/MarkdownProcessor.cs
@@ -0,0 +1,52 @@
+using System;

+using System.IO;

+using System.Linq;

+using System.Text;

+using Markdig;

+using Markdig.Renderers.Normalize;

+using Markdig.Syntax;

+using Markdig.Syntax.Inlines;

+using Microsoft.AspNetCore.Mvc;

+using Timeline.Controllers;

+

+namespace Timeline.Services

+{

+    public class MarkdownProcessor

+    {

+        public string Process(string text, Func<long, string> urlGenerator)

+        {

+            MarkdownDocument markdown = Markdown.Parse(text);

+            foreach (var link in markdown.Descendants().Where(e => e is LinkInline).Cast<LinkInline>())

+            {

+                if (int.TryParse(link.Url, out var dataIndex))

+                {

+                    link.Url = urlGenerator(dataIndex);

+                }

+            }

+

+            var writer = new StringWriter();

+            NormalizeRenderer renderer = new NormalizeRenderer(writer);

+            renderer.Render(markdown);

+

+            return writer.ToString();

+        }

+

+        /// <summary>Convert data url to true url with post id.</summary>

+        public string Process(string text, IUrlHelper url, string timeline, long post)

+        {

+            return Process(

+                text,

+                dataIndex => url.ActionLink(

+                    nameof(TimelinePostController.DataGet),

+                    nameof(TimelinePostController)[0..^nameof(Controller).Length],

+                    new { timeline, post, data_index = dataIndex }

+                )

+            );

+        }

+

+        public byte[] Process(byte[] data, IUrlHelper url, string timeline, long post)

+        {

+            return Encoding.UTF8.GetBytes(Process(Encoding.UTF8.GetString(data), url, timeline, post));

+        }

+    }

+}

diff --git a/BackEnd/Timeline/Startup.cs b/BackEnd/Timeline/Startup.cs
index 26ba3bfc..4f392b2d 100644
--- a/BackEnd/Timeline/Startup.cs
+++ b/BackEnd/Timeline/Startup.cs
@@ -125,6 +125,8 @@ namespace Timeline
 

             services.AddScoped<ISearchService, SearchService>();

 

+            services.AddScoped<MarkdownProcessor>();

+

             services.AddOpenApiDocs();

 

             if (_frontEndMode == FrontEndMode.Mock)

diff --git a/BackEnd/Timeline/Timeline.csproj b/BackEnd/Timeline/Timeline.csproj
index 70536e00..6b565598 100644
--- a/BackEnd/Timeline/Timeline.csproj
+++ b/BackEnd/Timeline/Timeline.csproj
@@ -33,6 +33,7 @@
     <ItemGroup>

         <PackageReference Include="AutoMapper" Version="10.1.1" />

         <PackageReference Include="AutoMapper.Extensions.Microsoft.DependencyInjection" Version="8.1.0" />

+        <PackageReference Include="Markdig" Version="0.23.0" />

         <PackageReference Include="Microsoft.AspNetCore.SpaServices.Extensions" Version="5.0.0" />

         <PackageReference Include="Microsoft.CodeAnalysis.FxCopAnalyzers" Version="3.3.1">

             <PrivateAssets>all</PrivateAssets>

diff --git a/BackEnd/Timeline/packages.lock.json b/BackEnd/Timeline/packages.lock.json
index 36442da7..da61aafc 100644
--- a/BackEnd/Timeline/packages.lock.json
+++ b/BackEnd/Timeline/packages.lock.json
@@ -23,6 +23,12 @@
           "Microsoft.Extensions.Options": "3.0.0"

         }

       },

+      "Markdig": {

+        "type": "Direct",

+        "requested": "[0.23.0, )",

+        "resolved": "0.23.0",

+        "contentHash": "jPPcnHGSDSedPvwZ6jiMJpvK3iJGA2djU6TFmEr6XK2BiYK1ier2lTHVwDt41XLxDbfGu5Dn42hKDzwqs049PA=="

+      },

       "Microsoft.AspNetCore.SpaServices.Extensions": {

         "type": "Direct",

         "requested": "[5.0.0, )",