#
# Example .\copy-content.ps1 C:\Users\rcarvalhoxavier\files\ csv C:\Users\rcarvalhoxavier\files\unified\file.csv
#

param (
[Parameter(Mandatory=$true)][string] $path,
[Parameter(Mandatory=$true)][string] $extension,
[Parameter(Mandatory=$true)][string] $pathNewFile
)

#Verify if path exists
if (Test-Path $path) {
    #Gets files according the extension
    $Files = Get-ChildItem $path* -Include *.$extension | %{ @{Path=$_.FullName} }
    [int]$qtd = ($Files.Values).Count
    #log how many found
    Write-Host $qtd "files found"
    #verify how many founded
    if($qtd -gt 0){
        #removes the new file would by generated -- if not exists, ignore
        Remove-Item $pathNewFile -Force -ErrorAction Ignore
        #Copy content
        foreach ($file in $Files.Values) {
            Get-Content $file | Out-File  -FilePath $pathNewFile -Append
        }
        #success :)
        Write-Host "Content copied to" $pathNewFile
    }
}
else
{
    Write-Host "Cannot find path" $path
}