//  Copyright 2017 Google Inc. All Rights Reserved.
//
//  Licensed under the Apache License, Version 2.0 (the "License");
//  you may not use this file except in compliance with the License.
//  You may obtain a copy of the License at
//
//  http://www.apache.org/licenses/LICENSE-2.0
//
//  Unless required by applicable law or agreed to in writing, software
//  distributed under the License is distributed on an "AS IS" BASIS,
//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//  See the License for the specific language governing permissions and
//  limitations under the License.

using NtApiDotNet;
using System.Management.Automation;

namespace NtObjectManager.Cmdlets.Object
{

    /// <summary>
    /// <para type="synopsis">Create a new NT section object.</para>
    /// <para type="description">This cmdlet creates a new NT section object. The absolute path to the object in the NT object manager name space can be specified. 
    /// It's also possible to create the object relative to an existing object by specified the -Root parameter. If no path is specified than an unnamed object will be created which
    /// can only be duplicated by handle.</para>
    /// </summary>
    /// <example>
    ///   <code>$obj = New-NtSection -Size 4096</code>
    ///   <para>Create a new anonymous section object of size 4096 bytes.</para>
    /// </example>
    /// <example>
    ///   <code>$obj = New-NtSection \BaseNamedObjects\ABC -Size 4096</code>
    ///   <para>Create a new section object with an absolute path.</para>
    /// </example>
    /// <example>
    ///   <code>$file = Get-NtFile \??\C:\SomeFile&#x0A;$obj = New-NtSection -File $file -Protection ReadOnly</code>
    ///   <para>Create a new section object backed by a file with read only protection.
    ///   </para>
    /// </example>
    /// <example>
    ///   <code>$file = Get-NtFile \??\C:\Windows\notepad.exe&#x0A;$obj = New-NtSection -File $file -SectionAttributes Image -Protection ReadOnly</code>
    ///   <para>Create a new image section object backed by an executable file.
    ///   </para>
    /// </example>
    /// <para type="link">about_ManagingNtObjectLifetime</para>
    [Cmdlet(VerbsCommon.New, "NtSection")]
    [OutputType(typeof(NtSection))]
    public sealed class NewNtSectionCmdlet : NtObjectBaseCmdletWithAccess<SectionAccessRights>
    {
        /// <summary>
        /// Determine if the cmdlet can create objects.
        /// </summary>
        /// <returns>True if objects can be created.</returns>
        protected override bool CanCreateDirectories()
        {
            return true;
        }

        /// <summary>
        /// <para type="description">An existing file to use as backing for the section.</para>
        /// </summary>
        [Parameter]
        public NtFile File { get; set; }

        /// <summary>
        /// <para type="description">An optional size for the section.</para>
        /// </summary>
        [Parameter]
        public LargeInteger Size { get; set; }

        /// <summary>
        /// <para type="description">Memory allocation protection flags.</para>
        /// </summary>
        [Parameter]
        public MemoryAllocationProtect Protection { get; set; }

        /// <summary>
        /// <para type="description">Section attribute flags.</para>
        /// </summary>
        [Parameter]
        public SectionAttributes SectionAttributes { get; set; }

        /// <summary>
        /// Method to create an object from a set of object attributes.
        /// </summary>
        /// <param name="obj_attributes">The object attributes to create/open from.</param>
        /// <returns>The newly created object.</returns>
        protected override object CreateObject(ObjectAttributes obj_attributes)
        {
            return NtSection.Create(obj_attributes, Access, Size, Protection, SectionAttributes, File);
        }

        /// <summary>
        /// Constructor.
        /// </summary>
        public NewNtSectionCmdlet()
        {
            Protection = MemoryAllocationProtect.ReadWrite;
            SectionAttributes = SectionAttributes.Commit;
        }
    }
}
