write-host -ForegroundColor Yellow "PowerShellJS"

#region implementation detail variables for module

$script:JSSessions = new-object "System.Collections.ObjectModel.Collection``1[System.Object]"

$script:newsessionnameindex = 0

$script:newsessionIDindex = 0

#endregion

#region JSSession CMDlets (New,Get,Remove)

function New-JSSession

{

[CmdletBinding()]

param(

[Parameter(Mandatory=$false)]

[string] $Name

)

#TODO intelligent way to do job name

$script:newsessionIDindex = $script:newsessionIDindex + 1;

if($Name -eq $null -or $Name -eq "")

{

$script:newsessionnameindex = $script:newsessionnameindex + 1;

$Name = "Session{0}" -f $script:newsessionnameindex

}

#TODO try/catch

#TODO options to exclude JSON and ES5 shim.

$engine = new-object MsieJavaScriptEngine.MsieJsEngine "ChakraActiveScript",$true,$true

$session = New-Object pscustomobject -Property @{

Id = $script:newsessionIDindex

Name = $Name

State = "NOTIMPLEMENTED" #TODO implement approprate states.

Engine = $engine

}

$session.psobject.typenames.insert(0,"JSSession") #TODO some PS1XML formating for this object "type"

$script:JSSessions.add( $session ) | out-null

Write-Output $session

}

function Get-JSSession

{

[CmdletBinding()]

param(

[Parameter(Mandatory=$false)]

[string[]] $Name,

[Parameter(Mandatory=$false)]

[Int[]] $Id

)

#TODO: exception when not existing and implicitly requested

#TODO: wildcard search on names

$script:JSSessions |

where-object { $id -eq $null -or $id -eq $_.id } |

where-object { $name -eq $null -or $name -eq $_.name }

}

function Remove-JSSession

{

[CmdletBinding()]

param(

[Parameter(Mandatory=$false)]

[string[]] $Name,

[Parameter(Mandatory=$false)]

[Int[]] $Id

)

#TODO: exception when not existing and implicitly requested

#TODO: wildcard search on names

$toremove = $script:JSSessions |

where-object { $id -eq $null -or $id -eq $_.id } |

where-object { $name -eq $null -or $name -eq $_.name }

$toremove | foreach {

#remove from our list

$script:JSSessions.remove($_) | out-null

#dispose of JS environment

$_.engine.dispose()

}

}

#endregion

function Get-JSCommand {

[cmdletbinding()]param()

Get-Command -Module PowerChakra

}

function Invoke-TypeScript

{

[CmdletBinding()]

param(

[Parameter(Mandatory=$false,Position=0)]

[string] $Script,

[Parameter(Mandatory=$false)]

[string] $Name,

[Parameter(Mandatory=$false)]

[Int] $Id,

[Parameter(Mandatory=$false)]

[ValidateScript({$_ -eq $null -or $_.psobject.typenames -contains "JSSession"} )]

[object] $Session,

[Parameter(Mandatory=$false)]

[switch] $NoResults

)

#TODO find session, otherwise create a temporary session. #we aren't having fan out , so only so with one , if duplicates then error

$hassession = $false;$hasTempSession=$false;

if($session -ne $null) { $hassession = $true; } #lets trust that if the classname is JSSession its valid

elseif ($id -ne 0 ) {

$tmp = Get-JSSession -id $id

if (@($tmp).Count -gt 1) { throw "Must resolve to a single session" }

if ($tmp -ne $null) {$session = $tmp; $hassession = $true}

}

elseif ($name -ne [string]::Empty) {

$tmp = Get-JSSession -Name $Name

if (@($tmp).Count -gt 1) { throw "Must resolve to a single session" }

if ($tmp -ne $null) {$session = $tmp; $hassession = $true}

}

if(-not $hassession)

{

$engine = new-object MsieJavaScriptEngine.MsieJsEngine $true,$true

$tmpsession = New-Object pscustomobject -Property @{

Id = -1

Name = "TMP SESSION"

State = "NOTIMPLEMENTED" #TODO implement approprate states.

Engine = $engine

}

$tmpsession.psobject.typenames.insert(0,"JSSession") #TODO some PS1XML formating for this object "type"

$hasTempSession = $true;

$session = $tmpsession

$hassession = $true

}

$istypeScriptLoaded = $session.engine.Hasvariable("TypeScript")

if (!$istypeScriptLoaded) {

$session.Engine.ExecuteFile($(join-path $psscriptroot "typescript.js"),[System.Text.Encoding]::UTF8)

}

$session.Engine.setVariableValue("_typescripttocompile",$script)

invoke-JS -session $session -Script "

var compiler = new TypeScript.TypeScriptCompiler()

var snapshot = TypeScript.ScriptSnapshot.fromString(_typescripttocompile)

compiler.addFile('dynamictypescript.js', snapshot);

var iter = compiler.compile();

var output = '';

while(iter.moveNext()) {

var current = iter.current().outputFiles[0];

output += !!current ? current.text : '';

}

eval(output)

" -NoResults:$NoResults

if($hasTempSession)

{

#cleanup

$session.engine.dispose();

}

}

function Invoke-JS {

[CmdletBinding()]

param(

[Parameter(Mandatory=$false,Position=0)]

[string] $Script,

[Parameter(Mandatory=$false)]

[string] $Name,

[Parameter(Mandatory=$false)]

[Int] $Id,

[Parameter(Mandatory=$false)]

[ValidateScript({$_ -eq $null -or $_.psobject.typenames -contains "JSSession"} )]

[object] $Session,

[Parameter(Mandatory=$false)]

[switch] $NoResults

)

#TODO find session, otherwise create a temporary session. #we aren't having fan out , so only so with one , if duplicates then error

$hassession = $false;$hasTempSession=$false;

if($session -ne $null) { $hassession = $true; } #lets trust that if the classname is JSSession its valid

elseif ($id -ne 0 ) {

$tmp = Get-JSSession -id $id

if (@($tmp).Count -gt 1) { throw "Must resolve to a single session" }

if ($tmp -ne $null) {$session = $tmp; $hassession = $true}

}

elseif ($name -ne [string]::Empty) {

$tmp = Get-JSSession -Name $Name

if (@($tmp).Count -gt 1) { throw "Must resolve to a single session" }

if ($tmp -ne $null) {$session = $tmp; $hassession = $true}

}

if(-not $hassession)

{

$engine = new-object MsieJavaScriptEngine.MsieJsEngine $true,$true

$tmpsession = New-Object pscustomobject -Property @{

Id = -1

Name = "TMP SESSION"

State = "NOTIMPLEMENTED" #TODO implement approprate states.

Engine = $engine

}

$tmpsession.psobject.typenames.insert(0,"JSSession") #TODO some PS1XML formating for this object "type"

$hasTempSession = $true;

$session = $tmpsession

$hassession = $true

}

if ($NoResults)

{

$session.engine.execute($script)

}

else

{

$session.engine.evaluate($script)

}

if($hasTempSession)

{

#cleanup

$session.engine.dispose();

}

}

Export-ModuleMember -Function New-JSSession,Get-JSSession,Remove-JSSession,Get-JSCommand,Invoke-JS,Invoke-TypeScript