functions/Add-SPClientType.ps1

#Requires -Version 3.0

# Add-SPClientType.ps1
#
# Copyright (c) 2017 karamem0
#
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# of this software and associated documentation files (the "Software"), to deal
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# furnished to do so, subject to the following conditions:
#
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# SOFTWARE.

function Add-SPClientType {

<#
.SYNOPSIS
  Loads SharePoint Client Components assemblies.
.DESCRIPTION
  Usually this cmdlet loads assemblies below.
    - %COMMONPROGRAMFILES%\Microsoft Shared\Web Server Extensions\<VERSION>\ISAPI
      - Microsoft.SharePoint.Client.dll
      - Microsoft.SharePoint.Client.Runtime.dll
.PARAMETER Version
  Indicates the version of SharePoint Client Components.
  The version must be "15" (SharePoint 2013), or "16" (SharePoint 2016).
  If not specified, uses the latest version.
#>


    [CmdletBinding()]
    param (
        [Parameter(Mandatory = $false)]
        [ValidateSet('15', '16')]
        [String]
        $Version
    )

    process {
        $path = Join-Path $Env:CommonProgramFiles 'Microsoft Shared\Web Server Extensions'
        if (-not (Test-Path $path)) {
            throw 'SharePoint Client Component is not installed.'
        }
        if (-not (Get-ChildItem $path)) {
            throw 'SharePoint Client Component is not installed.'
        }
        if ([String]::IsNullOrEmpty($Version)) {
            $Version = [String](Get-ChildItem $path | Sort-Object -Descending)[0]
        }
        $path = Join-Path $path $Version
        $path = Join-Path $path 'ISAPI'
        Add-Type -Path (Join-Path $path 'Microsoft.SharePoint.Client.dll')
        Add-Type -Path (Join-Path $path 'Microsoft.SharePoint.Client.Runtime.dll')
    }

}