<#Find-Missingfiles.ps1
#File/folder comparison tool to check a source and destination for missing files/folders
#Reports missing source files, ignores extra files on the destination

.EXAMPLE
Find-MissingFiles.ps1 | Out-File MissingSource.txt
#>

$SourcePath = '\\SERVERNAME\TVShows\Filed'
$DestPath = '\\DOMAINCONTROLLERNAME\d$\TVSeries'

#Equivalent cmd for 'dir /b /s'
$Source = (Get-ChildItem $SourcePath -Recurse).FullName
$Dest = (Get-ChildItem $DestPath -Recurse).FullName

#1/-1 - Different, 0 - Same
$Source[1].CompareTo($Dest[1])
$Source[1].CompareTo($Source[1])

#Cleanup to make the paths appear same
#Basically removing the uncommon source and destination paths portion
for ($i = 0; $i -lt $Source.Count; $i++) {
    $Source[$i] = $Source[$i].Replace($SourcePath, "")
}

for ($i = 0; $i -lt $Dest.Count; $i++) {
    $Dest[$i] = $Dest[$i].Replace($DestPath, "")
}

#Loop the Source files
foreach ($fileS in $Source) {
    #Counter for match
    $Found = $false

    #Loop destination files to Compare with each source
    foreach ($fileD in $Dest) {
        #Check Exact Match
        if ($fileD.CompareTo($fileS) -eq 0)
        { $Found = $true }

    }
    #Writeout missing files
    if (-not $Found)
    { "$SourcePath$fileS" }

}