posh:typedata

get-typedata.ps1

using namespace System.Management

$ERROR_ACTION = 'SilentlyContinue'

$jaobj = [PSCustomObject]@{
  PSTypeName = 'JaHer.Object'
  Name       = 'Bjarki'
  Language   = 'PowerShell'
  Country    = 'Iceland'
}


$ExtensionMethods = @(
  @{
    TypeName    = 'JaHer.Object'
    MemberType  = 'ScriptMethod'
    MemberName  = 'ToHashTable'
    Value       = {
      $hash = @{}
      $this.psobject.properties |
        ForEach-Object { $hash.Add($_.Name, $_.Value) }
      $hash
    }
    ErrorAction = $ERROR_ACTION
  }
)

$toHash = @{
  TypeName    = 'JaHer.Object'
  MemberType  = 'ScriptMethod'
  MemberName  = 'ToHashTable'
  Value       = {
    $hash = @{}
    $this.psobject.properties |
      ForEach-Object { $hash.Add($_.Name, $_.Value) }
    $hash
  }
  ErrorAction = $ERROR_ACTION
}

Update-TypeData @toHash

# $ExtensionMethods | ForEach-Object {Update-TypeData @_}
$toUpper = @{
  TypeName    = 'JaHer.Object'
  MemberType  = 'ScriptProperty'
  MemberName  = 'Upper'
  Value       = { $this.Name.toUpper() }
  ErrorAction = $ERROR_ACTION
}

Update-TypeData @toUpper




$TypeData = @{
  TypeName                  = 'JaHer.Object'
  DefaultDisplayPropertySet = 'Name', 'Language'
  ErrorAction               = $ERROR_ACTION

}

Update-TypeData @TypeData 

$jaobj.upper
$jaobj.UpperCaseName
$jaobj.ToHashTable()


function Set-JaObj {
  param( [PSTypeName('JaHer.Object')]$Data )

  Write-Host $Data
}


function New-JaObj {
  [OutputType('JaHer.Object')]
  [CmdletBinding()]
  param([Hashtable]$Data)

  $obj = [PSCustomObject]@{
    TypeName = 'JaHer.Object' 
  }

  $Data.GetEnumerator() |
    ForEach-Object {
      $obj | Add-Member $_.Key $_.Value 
    }

  return $obj
}

update-native-typedata.ps1

$ERROR_ACTION = "SilentlyContinue"

$typedata =@{
  TypeName    = 'System.DateTime'
  MemberType  = 'ScriptMethod'
  MemberName  = 'DaysInThisMonth'
  Value       = {



  }
  ErrorAction = $ERROR_ACTION
}


$Signature = @"
public class DateTimeExt
{
  public static int DaysInThisMonth(this System.DateTime date)
    => date.DaysInMonth(date.Now.Year, date.Now.Month)
}
"@

Add-Type -TypeDefinition $Signature