functions/SPClientFile/New-SPClientFile.ps1

#Requires -Version 3.0

# New-SPClientFile.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
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# 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
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# SOFTWARE.

function New-SPClientFile {

<#
.SYNOPSIS
  Creates a new file.
.DESCRIPTION
  The New-SPClientFile function adds a new file to the folder.
.PARAMETER ClientContext
  Indicates the client context. If not specified, uses default context.
.PARAMETER ParentFolder
  Indicates the folder which a file to be created.
.PARAMETER ContentPath
  Indicates the content file path.
.PARAMETER ContentStream
  Indicates the content stream.
.PARAMETER Name
  Indicates the file name.
.PARAMETER Retrievals
  Indicates the data retrieval expression.
.EXAMPLE
  New-SPClientFile $folder -Name "CustomFile.xlsx" -ContentStream $stream
.EXAMPLE
  New-SPClientFile $folder -ContentPath "C:\Users\John\Documents\CustomFile.xlsx"
#>


    [CmdletBinding(DefaultParameterSetName = 'ContentStream')]
    param (
        [Parameter(Mandatory = $false)]
        [Microsoft.SharePoint.Client.ClientContext]
        $ClientContext = $SPClient.ClientContext,
        [Parameter(Mandatory = $true, Position = 0, ValueFromPipeline = $true)]
        [Microsoft.SharePoint.Client.Folder]
        $ParentFolder,
        [Parameter(Mandatory = $true, ParameterSetName = 'ContentStream')]
        [System.IO.Stream]
        $ContentStream,
        [Parameter(Mandatory = $true, ParameterSetName = 'ContentPath')]
        [string]
        $ContentPath,
        [Parameter(Mandatory = $true, ParameterSetName = 'ContentStream')]
        [Parameter(Mandatory = $false, ParameterSetName = 'ContentPath')]
        [string]
        $Name,
        [Parameter(Mandatory = $false)]
        [string]
        $Retrievals
    )

    process {
        if ($ClientContext -eq $null) {
            throw "Cannot bind argument to parameter 'ClientContext' because it is null."
        }
        $Creation = New-Object Microsoft.SharePoint.Client.FileCreationInformation
        if ($PSCmdlet.ParameterSetName -eq 'ContentStream') {
            $Creation.ContentStream = $ContentStream
            $Creation.Url = $Name
        }
        if ($PSCmdlet.ParameterSetName -eq 'ContentPath') {
            if (-not (Test-Path -Path $ContentPath)) {
                throw "Cannot find file '$($ContentPath)'."
            }
            $Creation.ContentStream = [System.IO.File]::OpenRead($ContentPath)
            if ($PSBoundParameters.ContainsKey('Name')) {
                $Creation.Url = $Name
            } else {
                $Creation.Url = [System.IO.Path]::GetFileName($ContentPath)
            }
        }
        $ClientObject = $ParentFolder.Files.Add($Creation)
        Invoke-SPClientLoadQuery `
            -ClientContext $ClientContext `
            -ClientObject $ClientObject `
            -Retrievals $Retrievals
        Write-Output $ClientObject
    }

}