functions/SPClientContentType/Get-SPClientContentType.ps1

#Requires -Version 3.0

<#
  Get-SPClientContentType.ps1
 
  Copyright (c) 2017 karamem0
 
  Permission is hereby granted, free of charge, to any person obtaining a copy
  of this software and associated documentation files (the "Software"), to deal
  in the Software without restriction, including without limitation the rights
  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  copies of the Software, and to permit persons to whom the Software is
  furnished to do so, subject to the following conditions:
 
  The above copyright notice and this permission notice shall be included in all
  copies or substantial portions of the Software.
 
  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  SOFTWARE.
#>


function Get-SPClientContentType {

<#
.SYNOPSIS
  Gets one or more content types.
.DESCRIPTION
  The Get-SPClientContentType function lists all content types or retrieves the
  specified content type. If not specified filterable parameter, returns all
  content types of the web or list. Otherwise, returns a content type which
  matches the parameter.
.PARAMETER ClientContext
  Indicates the client context. If not specified, uses default context.
.PARAMETER ParentObject
  Indicates the web or list which the content types are contained.
.PARAMETER Identity
  Indicates the content type ID.
.PARAMETER Name
  Indicates the content type name.
.PARAMETER Retrievals
  Indicates the data retrieval expression.
.EXAMPLE
  Get-SPClientContentType $web
.EXAMPLE
  Get-SPClientContentType $web -Identity "0X01009BD26CA6BE114008A9D56E68022DD1A7"
.EXAMPLE
  Get-SPClientContentType $web -Name "Custom Content Type"
.EXAMPLE
  Get-SPClientContentType $web -Retrievals "Title"
.INPUTS
  None or SPClient.SPClientContentTypeParentParameter
.OUTPUTS
  Microsoft.SharePoint.Client.ContentTypeCollection or Microsoft.SharePoint.Client.ContentType
.LINK
  https://github.com/karamem0/SPClient/blob/master/doc/Get-SPClientContentType.md
#>


    [CmdletBinding(DefaultParameterSetName = 'All')]
    param (
        [Parameter(Mandatory = $false, ParameterSetName = 'All')]
        [Parameter(Mandatory = $false, ParameterSetName = 'Identity')]
        [Parameter(Mandatory = $false, ParameterSetName = 'Name')]
        [Microsoft.SharePoint.Client.ClientContext]
        $ClientContext = $SPClient.ClientContext,
        [Parameter(Mandatory = $true, Position = 0, ValueFromPipeline = $true)]
        [SPClient.SPClientContentTypeParentParameter]
        $ParentObject,
        [Parameter(Mandatory = $true, ParameterSetName = 'Identity')]
        [Alias('Id')]
        [string]
        $Identity,
        [Parameter(Mandatory = $true, ParameterSetName = 'Name')]
        [string]
        $Name,
        [Parameter(Mandatory = $false)]
        [string]
        $Retrievals
    )

    process {
        if ($ClientContext -eq $null) {
            throw "Cannot bind argument to parameter 'ClientContext' because it is null."
        }
        $ClientObjectCollection = $ParentObject.ClientObject.ContentTypes
        if ($PSCmdlet.ParameterSetName -eq 'All') {
            Invoke-SPClientLoadQuery `
                -ClientContext $ClientContext `
                -ClientObject $ClientObjectCollection `
                -Retrievals $Retrievals
            Write-Output @(, $ClientObjectCollection)
        }
        if ($PSCmdlet.ParameterSetName -eq 'Identity') {
            $PathMethod = New-Object Microsoft.SharePoint.Client.ObjectPathMethod( `
                $ClientContext, `
                $ClientObjectCollection.Path, `
                'GetById', `
                [object[]]$Identity)
            $ClientObject = New-Object Microsoft.SharePoint.Client.ContentType($ClientContext, $PathMethod)
            Invoke-SPClientLoadQuery `
                -ClientContext $ClientContext `
                -ClientObject $ClientObject `
                -Retrievals $Retrievals
            if ($ClientObject.Id -eq $null) {
                throw 'The specified content type could not be found.'
            }
            Write-Output $ClientObject
        }
        if ($PSCmdlet.ParameterSetName -eq 'Name') {
            Invoke-SPClientLoadQuery `
                -ClientContext $ClientContext `
                -ClientObject $ClientObjectCollection `
                -Retrievals 'Include(Name)'
            $ClientObject = $ClientObjectCollection | Where-Object { $_.Name -eq $Name }
            if ($ClientObject -eq $null) {
                throw 'The specified content type could not be found.'
            }
            Invoke-SPClientLoadQuery `
                -ClientContext $ClientContext `
                -ClientObject $ClientObject `
                -Retrievals $Retrievals
            Write-Output $ClientObject
        }
    }

}