Add HTMLFormatter

Author: tomc128

BooleanExpressionParserWeb/BooleanExpressionParserWeb/Client/HTMLFormatter.cs

@@ -0,0 +1,62 @@
+using BooleanExpressionParser;
+using BooleanExpressionParser.Formatter;
+using System.Text;
+
+namespace BooleanExpressionParserWeb.Client;
+
+public class HTMLFormatter : IFormatter
+{
+    public string FormatTokens(IEnumerable<Token> tokens)
+    {
+        var sb = new StringBuilder();
+
+        foreach (Token token in tokens)
+        {
+            string s = token.ToString()!;
+            if (token is OperatorToken && s.Length > 1) s = $"[[{s}]]";
+            sb.Append(s);
+        }
+
+        return sb.ToString();
+    }
+
+    public string FormatTruthTable(Ast ast, List<bool[]> table, string label)
+    {
+        var sb = new StringBuilder();
+
+        // Generate HTML representation of the truth table
+        // table
+        //   tr
+        //     th th th
+        //   tr ***
+        //     td td td
+
+        sb.Append("<table class=\"truth-table\">");
+
+        sb.Append("<tr>");
+        for (int i = 0; i < ast.Variables.Count; i++)
+        {
+            string? item = ast.Variables[i];
+            sb.Append($"<th>{item}</th>");
+        }
+        sb.Append($"<th>{label}</th>");
+        sb.Append("</tr>");
+
+        foreach (bool[] row in table)
+        {
+            sb.Append("<tr>");
+            for (int i = 0; i < row.Length; i++)
+            {
+                sb.Append($"<td class=\"{(row[i] ? "true" : "false")}\">{(row[i] ? "1" : "0")}</td>");
+            }
+            sb.Append("</tr>");
+        }
+
+        return sb.ToString();
+    }
+
+    public string JoinTruthTables(params string[] tables)
+    {
+        throw new NotImplementedException();
+    }
+}