Add markdown generator

ObsidianSharp.Core/src/markdown/MdGenerator.cs

@@ -0,0 +1,53 @@
+using System.Text;
+
+namespace ObsidianSharp.Core.markdown; 
+
+public class MdGenerator {
+    private readonly StringBuilder md = new();
+    private readonly Dictionary<string, int> footnoteRefs = new();
+    private readonly List<string> footnotes = new();
+
+    public void Add(string txt) => md.Append(txt);
+    public void AddLine(string txt) => md.Append(txt + "<br/>\n");
+
+    public void NextLine() => AddLine("");
+
+    public void AddHeading(string txt, int level = 1) => AddLine(new string('#', level) + " " + txt);
+    public void AddHeading(string txt, string id, int level = 1) => AddLine($"{new('#', level)} {txt} {{#{id}}}");
+
+    public void AddBold(string txt) => Add($"**{txt}**");
+    public void AddItalic(string txt) => Add($"*{txt}*");
+    public void AddStrikethrough(string txt) => Add($"~~{txt}~~");
+    public void AddSubscript(string txt) => Add($"~{txt}~");
+    public void AddSuperscript(string txt) => Add($"^{txt}^");
+
+    public void AddQuote(string txt) => AddLine($"> {txt}");
+
+    public void AddCode(string txt) => AddLine($"`{txt}`");
+    public void AddCode(string txt, string lang) => AddLine($"`{lang} {txt}`");
+
+    public void AddRule() => AddLine("---");
+
+    public void AddLink(string title, string link) => Add($"[{title}]({link})");
+
+    public void AddImage(string title, string link) => Add($"![{title}]({link})");
+
+    public void AddFootnote(string title, string description) {
+        footnoteRefs.Add(title, footnotes.Count);
+        footnotes.Add($"[^{footnoteRefs[title] + 1}]: " + description);
+    }
+
+    public void AddFootnoteRef(string title) => Add($" [^{footnoteRefs[title] + 1}]");
+
+
+    public string Generate() {
+        StringBuilder sb = new(md.ToString());
+        sb.AppendLine();
+
+        foreach (string footnote in footnotes) {
+            sb.AppendLine(footnote);
+        }
+
+        return sb.ToString();
+    }
+}