Posh-Plantuml-Urls.psm1
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function Encode6Bit($b) { if ($b -lt 10) { return [char](48 + $b) } $b -= 10 if ($b -lt 26) { return [char](65 + $b) } $b -= 26 if ($b -lt 26) { return [char](97 + $b) } $b -= 26 if ($b -eq 0) { return '-' } if ($b -eq 1) { return '_' } return '?' } function Append3Bytes($b1, $b2, $b3) { $c1 = $b1 -shr 2 $c2 = (($b1 -band 0x3) -shl 4) -bor ($b2 -shr 4) $c3 = (($b2 -band 0xF) -shl 2) -bor ($b3 -shr 6) $c4 = $b3 -band 0x3F # [convert]::ToString($b1, 2) + "" + [convert]::ToString($b2, 2) + "" + [convert]::ToString($b3, 2) # [convert]::ToString($c1, 2) + "" + [convert]::ToString($c2, 2) + "" + [convert]::ToString($c3, 2) + "" + [convert]::ToString($c4, 2) $r = "" $r += Encode6Bit ($c1 -band 0x3F) $r += Encode6Bit ($c2 -band 0x3F) $r += Encode6Bit ($c3 -band 0x3F) $r += Encode6Bit ($c4 -band 0x3F) return $r } function Encode64($data) { $r = "" For ($i = 0; $i -lt $data.Length; $i += 3) { If (($i+2) -eq $data.Length) { $r += Append3Bytes $data[$i] $data[$i+1] 0 } ElseIf (($i+1) -eq $data.Length) { $r += Append3Bytes $data[$i] 0 0 } Else { $r += Append3Bytes $data[$i] $data[$i+1] $data[$i+2] } } return $r } function Deflate($text) { $data = [System.Text.Encoding]::UTF8.GetBytes($text) $sourceStream = [System.IO.MemoryStream]::new($data) $destStream = [IO.MemoryStream]::new() $compressionStream = [System.IO.Compression.DeflateStream]::new($destStream, [IO.Compression.CompressionMode]::Compress) $sourceStream.CopyTo($compressionStream) $compressionStream.Dispose() return $destStream.ToArray() } <# .SYNOPSIS Encodes text into PlantUml's base64-like URL format. .PARAMETER plantUml The text to be encoded. .EXAMPLE ConvertTo-EncodedPlantUml "Alice-->Bob:Hello" .EXAMPLE "Alice-->Bob:Hello" | ConvertTo-EncodedPlantUml .EXAMPLE Get-Content example.puml | ConvertTo-EncodedPlantUml #> Function ConvertTo-EncodedPlantUml { Param( [Parameter(ValueFromPipeline=$True,ValueFromPipelinebyPropertyName=$True)] [String] $plantUml ) $compressedText = Deflate $plantUml Encode64 $compressedText } Export-ModuleMember -Function ConvertTo-EncodedPlantUml |