SortEach-SchoolYear.ps1

$excluded = @("*.ps1", "*.bat", "*.exe", ".*", "_*")

function Move-SchoolYear([string]$folder, [int]$startYear)
{
    $start = '8/1/' + $startYear
    $end = '7/1/' + ($startYear + 1)

    # Select only files and exclude the others
    $files = dir *.* -exclude $excluded |
        # Only between the date range
        ? { $_.LastWriteTime -gt $start -AND $_.LastWriteTime -lt $end}

    # Skip this grade if we got not files
    if ($files -eq $null -OR $files.Count -eq 0) {
        Write-Host ($folder + ": No files to move")
        return
    }

    # Just to make it pretty, check if we only got one file
    if ($files.GetType() -eq [System.IO.FileInfo]) {
        Write-Host ($folder + ": 1 file to move")
    } else {
        Write-Host ($folder + ": " + $files.Count + " files to move")
    }

    # Don't make folder it it's already is there
    if (!(Test-Path $folder)) {
        mkdir $folder
    }

    $files | ForEach-Object {
        $name = $_.Name
        $source = $name
        $dest = $folder + "\\" + $name

        if (Test-Path $dest) {
            Write-Host ("   [!] Failed to move '" + $name + "'. File already exists.")
            continue
        }

        try {
            Move-Item $source $dest -ErrorAction Stop
            Write-Host ("   Moved " + $name)
        } catch {
            Write-Host ("   [!] Failed to move '" + $name + "'. " + $_.Exception.Message)
        }
    }
}

$grades = @{
    "Grade 10" = 2013;
    "Grade 9" = 2012;
    "Grade 8" = 2011;
    "Grade 7" = 2010;
    "Grade 6" = 2009
}

foreach($_ in $grades.GetEnumerator()) {
    Move-SchoolYear $_.Key $_.Value
}