Implementation of https://github.com/notable/notable/issues/54

sorter.ps1

$thisDirectory = (Get-Location).Path

$notes = Get-ChildItem -Path . -Filter *.md -Recurse -ErrorAction SilentlyContinue -Force
foreach ($note in $notes) {   
    $relativeFolder = $note.DirectoryName.Replace($thisDirectory, "").Trim().TrimStart("\")
    $contents = Get-Content -Path $note.FullName   

    if ($relativeFolder.Length -eq 0) {
        $relativeFolder = "."
    }


    $tagsMatch = [regex]::Match($contents, "tags: \[(.*?)\]")
    if ($contents.Contains("deleted: true")) {
        $tags = @("zzz_Trash")
    } elseif ($tagsMatch.Groups.Count -lt 2) {
        $tags = @()
    } else {
        $tags = ((,($tagsMatch.Groups[1].Value -split ", ") | Where-Object {$_.StartsWith("Notebooks")}) -replace "Notebooks/","")
    }

    if ($tags.Count -eq 0) {
        $targetDirectory = "."
    } ElseIf ($tags.Count -eq 1) {
        $targetDirectory = ($tags[0] -replace "[^\w\-. /]", "_")
    } else {
        $splitTags = @()
        foreach ($tag in $tags) {
            $splitTags += ,($tag -split "/")
        }

        $minTagLength = 99999
        foreach ($tags in $splitTags) {
            $minTagLength = [math]::min($minTagLength, $tags.Count)
        }

        $equalPath = "";
        :outer for ($i = 0; $i -lt $minTagLength; $i++){
            $tagName = $splitTags[0][$i];
            for ($j = 0; $j -lt $splitTags.Count; $j++){
                if ($splitTags[$j][$i] -ne $tagName) {
                    break outer;
                }
            }


            $equalPath += ,($tagName -replace  "[^\w\-. ]", "_");
            $equalPath += "/"
        }


        if ($equalPath.Length -eq 0) {
            $targetDirectory = "."
        } else {
            $targetDirectory = $equalPath.TrimEnd("/")
        }
    }

    $targetDirectory = $targetDirectory.Replace('/', '\')

    if ($targetDirectory -ne $relativeFolder) {
        echo "Moving $($note.Name) from $relativeFolder to $targetDirectory"
        New-Item $targetDirectory -ItemType Directory -ErrorAction SilentlyContinue
        move $note.FullName $targetDirectory
    } else {
        # echo "$($note.Name) Is already in proper folder"
    }   
}

echo "Complete"

pause