PipeScript

0.2.5

Transpilers/Templates/XAML.Template.psx.ps1

<#
.SYNOPSIS
    XAML Template Transpiler.
.DESCRIPTION
    Allows PipeScript to generate XAML.

    Multiline comments blocks like this ```<!--{}-->``` will be treated as blocks of PipeScript.

    Executed output will be converted to XAML
#>
[ValidatePattern('\.xaml$')]
param(
# The command information. This will include the path to the file.
[Parameter(Mandatory,ValueFromPipeline,ParameterSetName='TemplateFile')]
[Management.Automation.CommandInfo]
$CommandInfo,

# If set, will return the information required to dynamically apply this template to any text.
[Parameter(Mandatory,ParameterSetName='TemplateObject')]
[switch]
$AsTemplateObject,

# A dictionary of parameters.
[Collections.IDictionary]
$Parameter,

# A list of arguments.
[PSObject[]]
$ArgumentList
)

begin {
    # We start off by declaring a number of regular expressions:
    $startComment = '<\!--' # * Start Comments ```<!--```
    $endComment   = '-->'   # * End Comments ```-->```
    $Whitespace   = '[\s\n\r]{0,}'
    # * StartRegex ```$StartComment + '{' + $Whitespace```
    $startRegex = "(?<PSStart>${startComment}\{$Whitespace)"
    # * EndRegex ```$whitespace + '}' + $EndComment```
    $endRegex   = "(?<PSEnd>$Whitespace\}${endComment}\s{0,})"
    
    # Create a splat containing arguments to the core inline transpiler
    $Splat      = [Ordered]@{
        StartPattern  = $startRegex
        EndPattern    = $endRegex
    }
}

process {
    # If we have been passed a command
    if ($CommandInfo) {
        # add parameters related to the file.
        $Splat.SourceFile = $commandInfo.Source -as [IO.FileInfo]
        $Splat.SourceText = [IO.File]::ReadAllText($commandInfo.Source)
    }
    
    if ($Parameter) { $splat.Parameter = $Parameter }
    if ($ArgumentList) { $splat.ArgumentList = $ArgumentList }

    $splat.ForeachObject = {
        $in = $_
        if (($in -is [string]) -or 
            ($in.GetType -and $in.GetType().IsPrimitive)) {
            $in
        } elseif ($in.ChildNodes) {
            foreach ($inChildNode in $in.ChildNodes) {
                if ($inChildNode.NodeType -ne 'XmlDeclaration') {
                    $inChildNode.OuterXml
                }
            }
        } else {
            $inXml = (ConvertTo-Xml -Depth 100 -InputObject $in)
            foreach ($inChildNode in $inXml.ChildNodes) {
                if ($inChildNode.NodeType -ne 'XmlDeclaration') {
                    $inChildNode.OuterXml
                }
            }
        }
    }

    # If we are being used within a keyword,
    if ($AsTemplateObject) {
        $splat # output the parameters we would use to evaluate this file.
    } else {
        # Otherwise, call the core template transpiler
        .>PipeScript.Template @Splat # and output the changed file.
    }
}