// Copyright (c) Microsoft Corporation. All rights reserved.

// Licensed under the MIT license.

using System;

using System.Dynamic;

using System.Linq;

namespace Microsoft.ClearScript

{

/// <summary>

/// Extends <c><see cref="DynamicObject"/></c> for enhanced behavior and performance in a scripting environment.

/// </summary>

public abstract class DynamicHostObject : DynamicObject

{

// ReSharper disable EmptyConstructor

/// <summary>

/// Initializes a new <c><see cref="DynamicHostObject"/></c> instance.

/// </summary>

protected DynamicHostObject()

{

// the help file builder (SHFB) insists on an empty constructor here

}

// ReSharper restore EmptyConstructor

/// <summary>

/// Determines whether the object has the specified named member.

/// </summary>

/// <param name="name">The member name for which to search.</param>

/// <param name="ignoreCase"><c>True</c> to perform a case-insensitive search, <c>false</c> otherwise.</param>

/// <returns><c>True</c> if the named member was found, <c>false</c> otherwise.</returns>

public virtual bool HasMember(string name, bool ignoreCase)

{

var comparer = ignoreCase ? StringComparer.OrdinalIgnoreCase : StringComparer.Ordinal;

return GetDynamicMemberNames().Contains(name, comparer);

}

internal static bool HasMember(IDynamicMetaObjectProvider metaObjectProvider, DynamicMetaObject metaObject, string name, bool ignoreCase)

{

if (metaObjectProvider is DynamicHostObject hostObject)

{

return hostObject.HasMember(name, ignoreCase);

}

var comparer = ignoreCase ? StringComparer.OrdinalIgnoreCase : StringComparer.Ordinal;

return metaObject.GetDynamicMemberNames().Contains(name, comparer);

}

}

}