Import from internal git

Generator/Infrastructure/OpenApi/Builders/AbstractBuilder.cs

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+using Core;
+using Core.Events;
+using Core.Helpers;
+using Core.Templates;
+using Generator.Infrastructure.TemplateFiller;
+using Microsoft.OpenApi.Exceptions;
+
+namespace Generator.Infrastructure.OpenApi.Builders;
+
+/// <summary>
+/// Provides base behavior for generation purpose
+/// </summary>
+/// <typeparam name="TFile">Derived type from ISpecFile</typeparam>
+public abstract class AbstractBuilder<TFile> where TFile : ISpecFile
+{
+    private readonly ITemplateFactory _templateFactory; 
+    protected readonly CommandExecutor Executor;
+    protected TFile? SpecFile;
+    
+    public AbstractBuilder(string invite, DisplayEmitter emitter)
+    {
+        Executor = new CommandExecutor(invite, emitter);
+        _templateFactory = new MustacheTemplateFactory();
+        SpecFile = default;
+    }
+
+    /// <summary>
+    /// Registers file used for generation
+    /// </summary>
+    /// <param name="specFile"></param>
+    public void Load(TFile specFile) => SpecFile = TypeHelper.SafeCast<ISpecFile, TFile>(specFile);
+    
+    /// <summary>
+    /// Launches generation
+    /// </summary>
+    public async Task ExecuteAllAsync() => await Executor.RunRegistered();
+    
+    /// <summary>
+    /// Registers generation process
+    /// </summary>
+    public abstract void Generate();
+
+    /// <summary>
+    /// Registers build process
+    /// </summary>
+    public abstract void Build();
+  
+    /// <summary>
+    /// Check if the spec file has been loaded
+    /// </summary>
+    /// <exception cref="OpenApiException"></exception>
+    protected void CheckForNullSpec()
+    {
+        if (SpecFile == null) throw new OpenApiException("Spec file hasn't been loaded yet.");
+    }
+    
+    protected void MakeTemplate(string inputPath, string outputPath, IDictionary<string, object> data)
+    {
+        var template = _templateFactory.GetTemplate(inputPath, data);
+        var f = new MustacheFiller(template);
+        f.Fill();
+        f.Write(outputPath);
+    }
+}