Logic Scheme

homework/MarkDownConverter/Enums/NodeState.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MarkDownConverter.Enums
+{
+    public enum NodeState
+    {
+        Bold,
+        Italic,
+        Heading,
+        Symbols,
+        Root
+    }
+}

homework/MarkDownConverter/Enums/TokenState.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MarkDownConverter.Enums
+{
+    public enum TokenState
+    {
+        Space,
+        NewLine,
+        Numbers,
+        Symbols,
+        Italic,
+        Bold,
+        Heading,
+    }
+}

homework/MarkDownConverter/Interfaces/IParser.cs

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+using MarkDownConverter.Nodes;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MarkDownConverter.Interfaces
+{
+    public interface IParser
+    {
+        public ParentNode Parse(List<IToken> tokens);
+    }
+}

homework/MarkDownConverter/Interfaces/IToken.cs

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+using MarkDownConverter.Enums;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MarkDownConverter.Interfaces
+{
+    public interface IToken
+    {
+        public TokenState State { get; }
+        public int Position { get; }
+        public int Length { get; }
+        public string Value { get; }
+        bool Is(TokenState state);
+    }
+}

homework/MarkDownConverter/Interfaces/ITokenizer.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MarkDownConverter.Interfaces
+{
+    public interface ITokenizer
+    {
+        public List<IToken> Tokenize(string text);
+    }
+}

homework/MarkDownConverter/MarkDownConverter.cs

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+using MarkDownConverter.Interfaces;
+using MarkDownConverter.Nodes;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace MarkDownConverter
+{
+    public class MarkDownConverter(ITokenizer tokenizer, IParser parser)
+    {
+        public ITokenizer Tokenizer { get; } = tokenizer;
+        public IParser Parser { get; } = parser;
+
+        public string Convert(string input)
+        {
+            var tokens = Tokenizer.Tokenize(input);
+            var node = Parser.Parse(tokens);
+            return ConvertNodeToHtml(node);
+        }
+
+        private string ConvertNodeToHtml(ParentNode node)
+        {
+            var output = new StringBuilder();
+            CreateHtml(node, output);
+            return output.ToString();
+        }
+
+        private void CreateHtml(Node node, StringBuilder html)
+        {
+            switch (node)
+            {
+                case ParentNode patent:
+                    {
+                        foreach (var child in patent.Children)
+                            CreateHtml(child, html);
+                        break;
+                    }
+
+                case HeadingNode headingNode:
+                    html.Append("<h1>");
+                    foreach (var child in headingNode.Children)
+                        CreateHtml(child, html);
+                    html.Append("</h1>");
+                    break;
+
+                case SymbolsNode textNode:
+                    html.Append(textNode.Value);
+                    break;
+
+                case ItalicNode italicNode:
+                    html.Append("<em>");
+                    foreach (var child in italicNode.Children)
+                        CreateHtml(child, html);
+                    html.Append("</em>");
+                    break;
+
+                case BoldNode boldNode:
+                    html.Append("<strong>");
+                    foreach (var child in boldNode.Children)
+                        CreateHtml(child, html);
+                    html.Append("</strong>");
+                    break;
+            }
+        }
+    }
+}

homework/MarkDownConverter/MarkDownConverter.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

homework/MarkDownConverter/MarkDownConverter.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.11.35303.130
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "MarkDownConverter", "MarkDownConverter.csproj", "{F6D525F6-0754-45FD-86BF-4677B7432233}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MarkDownConverterTests", "..\MarkDownConverterTests\MarkDownConverterTests.csproj", "{6B32DAC7-FA8A-473E-BDF9-3FAD9A28F82E}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{F6D525F6-0754-45FD-86BF-4677B7432233}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{F6D525F6-0754-45FD-86BF-4677B7432233}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{F6D525F6-0754-45FD-86BF-4677B7432233}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{F6D525F6-0754-45FD-86BF-4677B7432233}.Release|Any CPU.Build.0 = Release|Any CPU
+		{6B32DAC7-FA8A-473E-BDF9-3FAD9A28F82E}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{6B32DAC7-FA8A-473E-BDF9-3FAD9A28F82E}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{6B32DAC7-FA8A-473E-BDF9-3FAD9A28F82E}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{6B32DAC7-FA8A-473E-BDF9-3FAD9A28F82E}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {B8C09EC2-68BD-444E-9228-8D75F49B7190}
+	EndGlobalSection
+EndGlobal