Putting the Squeeze on Files with PowerShell

$Compress={

    #initialize some variables

    $filters=@()

    $i=0

    $richtextbox1.Clear()

    $drive=$txtPath.Text.Substring(0,2)

    $filter="Drive='$drive' AND Compressed='False' AND Encrypted='FALSE'"

    $blnLog=$false

    $form1.Cursor="WaitCursor"

    if ($chkLogResults.checked) {

        #create a file for logging

        $timestamp=(get-date).toString('yyyMMddhhmmss')

        $logfile="Squeeze_$timestamp.log"

        $blnLog=$True

        #create the header

        "Server,Name,Extension,FileSize,LastModified,CreationDate,Drive,Path,Result" | out-file $logfile

    }

    #check other filter options

    if ($chkSize.Checked) {

        #add file size to filter

        [int]$FileSizeValue=$txtFileSize.Text

        $size=$FileSizeValue*1KB

        $filter+=" AND filesize >= $size"

    }

    if ($chkDate.Checked) {

         #convert datetime to a WMI datetime

        $datetime=[System.Management.ManagementDateTimeConverter]::ToDmtfDateTime($datetimepicker1.Value)

        $filter+=" AND LastModified >= '$datetime'"

    } #end if $chkDate.Checked

    if ($chkFileExtensions.Checked) {

        $arrExtensions=$txtExtensions.Text.split(",")

        $extensionFilter=" "

        for ($c=0;$c -lt $arrExtensions.Count;$c++) {

            $extensionFilter+="extension='$($arrExtensions[$c])'"

            if ($c -ne $arrExtensions.count-1) {

            $extensionFilter+=" OR "

            }

        }

        $filter+=" AND ($extensionFilter)"

    } #end if $chkFileExtensions.Checked

    #create a copy of the filter up to this point

    $basefilter=$filter

    #get base path

    if ($txtPath.Text.Length -eq 3) {

        #check if drive root

        $filepath="\\"

        $filter+=" AND path='$filepath'"

    }

    else {

           #parse out file path

           $filepath=$txtPath.Text.Substring(2)

           #replace \ with \\

           $filepath=$filepath.Replace("\","\\")

           $filter+=" AND path='$filepath\\'"

     }

    #add the base path to the set of filters

    $filters+=$filter

    if ($chkRecurse.Checked) {

       #process subfolders

       $p=$txtPath.Text

       dir $p  -rec | 

       where {$_.psIsContainer} | foreach {

           #replace \ with \\ and append the trailing \\

        $filepath="{0}\\" -f $_.fullname.substring(2).replace("\","\\")

        #append each filepath to a copy of the basefilter

        $tempFilter=$basefilter

        $tempfilter+=" AND path='$filepath'"

        #add each subfolder path to the collection of WMI query filters

        $filters+=$tempfilter

        } #end foreach

    } #end if $chkRecurse.checked

    foreach ($item in $filters) {

        #run a WMI query for each filter

        $cmd=("get-wmiobject -class CIM_DataFile -filter ""{0}""" -f "$item")

#        write-host $item -foregroundcolor CYAN

        $statusbar1.text="Running Query $item"

        $files=Invoke-Expression $cmd 

        if ($files) {

            foreach ($file in $files) {

                $i+=1

                $line="{0}`n" -f $file.name

                $richtextbox1.text+=$line

                $form1.Refresh()

                #compress the file if list only NOT checked

                if (! $chkListOnly.Checked) {

                    $rc=$file.Compress()

                    $result=$rc.returnValue

                }

                else {

                    $result="NA"

                }

                #log the results if checked

                if ($chkLogResults.checked) {

#                    "Server,Name,Extension,FileSize,LastModified,CreationDate,Drive,Path,Result"

                    $data="{0},{1},{2},{3},{4},{5},{6},{7},{8}" -f $file.CSName,$file.Name,$file.Extension,$file.FileSize,$file.ConvertToDateTime($file.LastModified),$file.ConvertToDateTime($file.CreationDate),$file.Drive,$file.path,$result

                    $data | out-file $logfile -append

                }

            } #end foreach $file in $files

        } #end if $files

        if ($i -gt 0) {

            $statusbar1.text="Found $i file(s) to compress"

        }

        else {

            $statusbar1.text="Failed to find any files to compress."

        }

    } #end foreach

    $form1.Cursor="Default"

    if ($blnLog) {notepad $logfile}

} #end Compress