make links on object holding anchors

Author: Mpdreamz

src/Elastic.Markdown/IO/State/LinkReference.cs

@@ -7,6 +7,13 @@
 
 namespace Elastic.Markdown.IO.State;
 
+public record LinkMetadata
+{
+	[JsonPropertyName("anchors")]
+	[JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+	public required string[]? Anchors { get; init; } = [];
+}
+
 public record LinkReference
 {
 	[JsonPropertyName("origin")]
@@ -17,7 +24,7 @@ public record LinkReference
 
 	/// Mapping of relative filepath and all the page's anchors for deeplinks
 	[JsonPropertyName("links")]
-	public required Dictionary<string, string[]> Links { get; init; } = [];
+	public required Dictionary<string, LinkMetadata> Links { get; init; } = [];
 
 	[JsonPropertyName("cross_links")]
 	public required string[] CrossLinks { get; init; } = [];
@@ -27,7 +34,11 @@ public static LinkReference Create(DocumentationSet set)
 		var crossLinks = set.Context.Collector.CrossLinks.ToHashSet().ToArray();
 		var links = set.MarkdownFiles.Values
 			.Select(m => (m.RelativePath, m.Anchors))
-			.ToDictionary(k => k.RelativePath, v => v.Anchors.ToArray());
+			.ToDictionary(k => k.RelativePath, v =>
+			{
+				var anchors = v.Anchors.Count == 0 ? null : v.Anchors.ToArray();
+				return new LinkMetadata { Anchors =  anchors };
+			});
 		return new LinkReference
 		{
 			UrlPathPrefix = set.Context.UrlPathPrefix,

tests/authoring/Generator/LinkReferenceFile.fs

@@ -59,12 +59,14 @@ Through various means $$$including-this-inline-syntax$$$
           },
           "url_path_prefix": "",
           "links": {
-            "file.md": [],
-            "index.md": [
-              "including-this-inline-syntax",
-              "this-anchor-is-autogenerated",
-              "and-anchored"
-            ]
+            "file.md": {},
+            "index.md": {
+              "anchors":[
+                "including-this-inline-syntax",
+                "this-anchor-is-autogenerated",
+                "and-anchored"
+              ]
+            }
           },
           "cross_links": []
         }