functions/Connect-SPClientContext.ps1

#Requires -Version 3.0

# Connect-SPClientContext.ps1
#
# Copyright (c) 2017 karamem0
#
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# 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
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# 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 Connect-SPClientContext {

<#
.SYNOPSIS
  Creates SharePoint client context.
.PARAMETER Url
  Indicates the SharePoint site url to connect.
.PARAMETER Network
  If specified, connects to SharePoint Server (On-premise).
.PARAMETER Online
  If specified, connects to SharePoint Online.
.PARAMETER UserName
  Indicates the user name to log-in.
.PARAMETER Password
  Indicates the password to log-in.
.PARAMETER Domain
  Indicates the domain to log-in.
.PARAMETER PassThru
  If specified, returns a client context.
#>


    [CmdletBinding()]
    param (
        [Parameter(Mandatory = $true, ParameterSetName = 'Network')]
        [switch]
        $Network,
        [Parameter(Mandatory = $true, ParameterSetName = 'Online')]
        [switch]
        $Online,
        [Parameter(Mandatory = $true, ParameterSetName = 'Network')]
        [Parameter(Mandatory = $true, ParameterSetName = 'Online')]
        [string]
        $Url,
        [Parameter(Mandatory = $true, ParameterSetName = 'Network')]
        [Parameter(Mandatory = $true, ParameterSetName = 'Online')]
        [string]
        $UserName,
        [Parameter(Mandatory = $true, ParameterSetName = 'Network')]
        [Parameter(Mandatory = $true, ParameterSetName = 'Online')]
        [securestring]
        $Password,
        [Parameter(Mandatory = $true, ParameterSetName = 'Network')]
        [string]
        $Domain,
        [Parameter(Mandatory = $false, ParameterSetName = 'Network')]
        [Parameter(Mandatory = $false, ParameterSetName = 'Online')]
        [switch]
        $PassThru
    )

    process {
        $clientContext = New-Object Microsoft.SharePoint.Client.ClientContext($Url)
        if ($PSCmdlet.ParameterSetName -eq 'Network') {
            $credentials = New-Object System.Net.NetworkCredential($UserName, $Password, $Domain)
            $clientContext.Credentials = $credentials
        }
        if ($PSCmdlet.ParameterSetName -eq 'Online') {
            $credentials = New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials($UserName, $Password)
            $clientContext.Credentials = $credentials
        }
        $SPClient.ClientContext = $clientContext
        if ($PassThru -eq $true) {
            Write-Output $clientContext
        }
    }

}