private string GenerateExtensionMethodsFor()

in src/JetBrains.Space.Generator/CodeGeneration/CSharp/Generators/CSharpPartialExtensionsGenerator.cs [39:118]
71 lines of code
14 McCabe index (conditional complexity)

    private string GenerateExtensionMethodsFor(
        string currentDtoType, 
        string currentPartialType,
        ApiField apiField)
    {
        var indent = new Indent();
        var builder = new CSharpBuilder();
            
        var propertyName = apiField.ToCSharpPropertyName(currentDtoType);
        var apiFieldName = apiField.Name;
            
        // Field
        ApiDocumentationUtilities.RenderCSharpDocumentation(apiField.Description, apiField.Experimental, output =>
        {
            builder.Append(indent.Wrap(output));
        });
        if (apiField.Deprecation != null)
        {
            builder.AppendLine($"{indent}{apiField.Deprecation.ToCSharpDeprecation()}");
        }
        else if (apiField.Experimental != null && FeatureFlags.GenerateExperimentalAnnotations)
        {
            builder.AppendLine($"{indent}{apiField.Experimental.ToCSharpExperimental()}");
        }
        builder.AppendLine($"{indent}public static {currentPartialType} With{propertyName}(this {currentPartialType} it)");
        indent.Increment();
        builder.AppendLine($"{indent}=> it.AddFieldName(\"{apiFieldName}\");");
        indent.Decrement();
        builder.AppendLine($"{indent}");

        var currentFieldInnerType = GenerateCSharpTypeFrom(apiField.Type);
            
        var isPrimitiveOrObject = apiField.Type is ApiFieldType.Primitive or ApiFieldType.Object;
        var isArrayOfPrimitive = apiField.Type is ApiFieldType.Array { ElementType: ApiFieldType.Primitive };
        if (!isPrimitiveOrObject && !isArrayOfPrimitive && !string.IsNullOrEmpty(currentFieldInnerType))
        {
            // Recursive field?
            if (currentDtoType == currentFieldInnerType)
            {
                ApiDocumentationUtilities.RenderCSharpDocumentation(apiField.Description, apiField.Experimental, output =>
                {
                    builder.Append(indent.Wrap(output));
                });
                if (apiField.Deprecation != null)
                {
                    builder.AppendLine($"{indent}{apiField.Deprecation.ToCSharpDeprecation()}");
                }
                else if (apiField.Experimental != null && FeatureFlags.GenerateExperimentalAnnotations)
                {
                    builder.AppendLine($"{indent}{apiField.Experimental.ToCSharpExperimental()}");
                }
                builder.AppendLine($"{indent}public static {currentPartialType} With{propertyName}Recursive(this {currentPartialType} it)");
                indent.Increment();
                builder.AppendLine($"{indent}=> it.AddFieldName(\"{apiFieldName}!\");");
                indent.Decrement();
                builder.AppendLine($"{indent}");
            }

            // Field with partial builder
            ApiDocumentationUtilities.RenderCSharpDocumentation(apiField.Description, apiField.Experimental, output =>
            {
                builder.Append(indent.Wrap(output));
            });
            if (apiField.Deprecation != null)
            {
                builder.AppendLine($"{indent}{apiField.Deprecation.ToCSharpDeprecation()}");
            }
            else if (apiField.Experimental != null && FeatureFlags.GenerateExperimentalAnnotations)
            {
                builder.AppendLine($"{indent}{apiField.Experimental.ToCSharpExperimental()}");
            }
            builder.AppendLine($"{indent}public static {currentPartialType} With{propertyName}(this {currentPartialType} it, Func<Partial<{currentFieldInnerType}>, Partial<{currentFieldInnerType}>> partialBuilder)");
            indent.Increment();
            builder.AppendLine($"{indent}=> it.AddFieldName(\"{apiFieldName}\", partialBuilder(new Partial<{currentFieldInnerType}>(it)));");
            indent.Decrement();
            builder.AppendLine($"{indent}");
        }

        return builder.ToString();
    }