Added new IFormatter interface

Author: tomc128

BooleanExpressionParser/Formatter.cs renamed to BooleanExpressionParser/Formatters/DisplayFormatter.cs

@@ -2,7 +2,7 @@
 using System.Text;
 using Spectre.Console;
 
-namespace BooleanExpressionParser;
+namespace BooleanExpressionParser.Formatter;
 
 enum ColourMode
 {
@@ -12,7 +12,7 @@ enum ColourMode
 }
 
 
-class Formatter
+class DisplayFormatter : IFormatter
 {
     private static int FinalPadding = 2;
 

BooleanExpressionParser/Formatters/IFormatter.cs

@@ -0,0 +1,11 @@
+namespace BooleanExpressionParser.Formatter
+{
+    interface IFormatter
+    {
+        string FormatTokens(IEnumerable<Token> tokens);
+
+        string FormatTruthTable(Ast ast, List<bool[]> table, string label);
+
+        string JoinTruthTables(params string[] tables);
+    }
+}

BooleanExpressionParser/Program.cs

@@ -1,5 +1,6 @@
 using System.CommandLine;
 using System.Text;
+using BooleanExpressionParser.Formatter;
 using Spectre.Console;
 
 namespace BooleanExpressionParser;
@@ -68,14 +69,17 @@ private static void TableHandler(OutputType outputType, string @true, string @fa
         var expressions = ParseExpressions(args);
 
         var tables = new List<string>();
-        var formatter = new Formatter
+
+        var formatter = GetFormatter(outputType);
+
+        if (formatter is DisplayFormatter displayFormatter)
         {
-            True = @true,
-            False = @false,
-            ColourMode = colourMode,
-            TrueColour = trueColour,
-            FalseColour = falseColour
-        };
+            displayFormatter.True = @true;
+            displayFormatter.False = @false;
+            displayFormatter.ColourMode = colourMode;
+            displayFormatter.TrueColour = trueColour;
+            displayFormatter.FalseColour = falseColour;
+        }
 
         foreach (var expression in expressions)
         {
@@ -118,7 +122,7 @@ private static void TableHandler(OutputType outputType, string @true, string @fa
     private static void ConvertHandler(OutputType outputType, string[] args)
     {
         var expressions = ParseExpressions(args);
-        var formatter = new Formatter();
+        var formatter = GetFormatter(outputType);
 
         foreach (var expression in expressions)
         {
@@ -135,6 +139,13 @@ private static void ConvertHandler(OutputType outputType, string[] args)
 
     static List<ExpressionWrapper> ParseExpressions(string[] args) => args.Length == 0 ? QueryExpressions() : args.Select(arg => new ExpressionWrapper(arg)).ToList();
 
+    static IFormatter GetFormatter(OutputType outputType) => outputType switch
+    {
+        OutputType.Display => new DisplayFormatter(),
+        OutputType.Basic => new BasicFormatter(),
+        _ => throw new ArgumentOutOfRangeException(nameof(outputType), outputType, null)
+    };
+
 
     static List<ExpressionWrapper> QueryExpressions()
     {