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ObjectParser.ps1
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<#
.SYNOPSIS
Class to support Object Graph Tools
.DESCRIPTION
This class provides general properties and method to recursively
iterate through to PowerShell Object Graph nodes.
For details, see:
* [PowerShell Object Parser][1] for details on the `[PSNode]` properties and methods.
* [Extended-Dot-Notation][2] for details on path selectors.
.LINK
[1]: https://github.com/iRon7/ObjectGraphTools/blob/main/Docs/ObjectParser.md "PowerShell Object Parser"
[2]: https://github.com/iRon7/ObjectGraphTools/blob/main/Docs/Xdn.md "Extended Dot Notation"
#>
using namespace System.Collections
using namespace System.Collections.Generic
using namespace System.Management.Automation
using namespace System.Management.Automation.Language
function Use-ClassAccessors {
<#
.SYNOPSIS
Implements class getter and setter accessors.
.DESCRIPTION
The [Use-ClassAccessors][1] cmdlet updates script property of a class from the getter and setter methods.
Which are also known as [accessors or mutator methods][2].
The getter and setter methods should use the following syntax:
### getter syntax
[<type>] get_<property name>() {
return <variable>
}
or:
[Object] get_<property name>() {
return ,[<Type>]<variable>
}
### setter syntax
set_<property name>(<variable>) {
<code>
}
> [!NOTE]
> A **setter** accessor requires a **getter** accessor to implement the related property.
> [!NOTE]
> In most cases, you might want to hide the getter and setter methods using the [`hidden` keyword][3]
> on the getter and setter methods.
.EXAMPLE
# Using class accessors
The following example defines a getter and setter for a `value` property
and a _readonly_ property for the type of the type of the contained value.
Install-Script -Name Use-ClassAccessors
Class ExampleClass {
hidden $_Value
hidden [Object] get_Value() {
return $this._Value
}
hidden set_Value($Value) {
$this._Value = $Value
}
hidden [Type]get_Type() {
if ($Null -eq $this.Value) { return $Null }
else { return $this._Value.GetType() }
}
hidden static ExampleClass() { Use-ClassAccessors }
}
$Example = [ExampleClass]::new()
$Example.Value = 42 # Set value to 42
$Example.Value # Returns 42
$Example.Type # Returns [Int] type info
$Example.Type = 'Something' # Throws readonly error
.PARAMETER Class
Specifies the class from which the accessor need to be initialized.
Default: The class from which this function is invoked (by its static initializer).
.PARAMETER Property
Filters the property that requires to be (re)initialized.
Default: All properties in the given class
.PARAMETER Force
Indicates that the cmdlet reloads the specified accessors,
even if the accessors already have been defined for the concerned class.
.LINK
[1]: https://github.com/iRon7/Use-ClassAccessors "Online Help"
[2]: https://en.wikipedia.org/wiki/Mutator_method "Mutator method"
[3]: https://learn.microsoft.com/powershell/module/microsoft.powershell.core/about/about_classes#hidden-keyword "Hidden keyword in classes"
#>
param(
[Parameter(ValueFromPipeline=$true, ValueFromPipelineByPropertyName=$true)]
[ValidateNotNullOrEmpty()]
[string[]]$Class,
[Parameter(ValueFromPipelineByPropertyName=$true)]
[ValidateNotNullOrEmpty()]
[string]$Property,
[switch]$Force
)
process {
$ClassNames =
if ($Class) { $Class }
else {
$Caller = (Get-PSCallStack)[1]
if ($Caller.FunctionName -ne '<ScriptBlock>') {
$Caller.FunctionName
}
elseif ($Caller.ScriptName) {
$Ast = [System.Management.Automation.Language.Parser]::ParseFile($Caller.ScriptName, [ref]$Null, [ref]$Null)
$Ast.EndBlock.Statements.where{ $_.IsClass }.Name
}
}
foreach ($ClassName in $ClassNames) {
$TargetType = $ClassName -as [Type]
if (-not $TargetType) { Write-Warning "Class not found: $ClassName" }
$TypeData = Get-TypeData -TypeName $ClassName
$Members = if ($TypeData -and $TypeData.Members) { $TypeData.Members.get_Keys() } else { @() }
$Methods =
if ($Property) {
$TargetType.GetMethod("get_$Property")
$TargetType.GetMethod("set_$Property")
}
else {
$targetType.GetMethods().where{ ($_.Name -Like 'get_*' -or $_.Name -Like 'set_*') -and $_.Name -NotLike '???__*' }
}
$Accessors = @{}
foreach ($Method in $Methods) {
$Member = $Method.Name.SubString(4)
if (-not $Force -and $Member -in $Members) { continue }
$Parameters = $Method.GetParameters()
if ($Method.Name -Like 'get_*') {
if ($Parameters.Count -eq 0) {
if ($Method.ReturnType.IsArray) {
$Expression = @"
`$TargetType = '$ClassName' -as [Type]
`$Method = `$TargetType.GetMethod('$($Method.Name)')
`$Invoke = `$Method.Invoke(`$this, `$Null)
`$Output = `$Invoke -as '$($Method.ReturnType.FullName)'
if (@(`$Invoke).Count -gt 1) { `$Output } else { ,`$Output }
"@
}
else {
$Expression = @"
`$TargetType = '$ClassName' -as [Type]
`$Method = `$TargetType.GetMethod('$($Method.Name)')
`$Method.Invoke(`$this, `$Null) -as '$($Method.ReturnType.FullName)'
"@
}
if (-not $Accessors.Contains($Member)) { $Accessors[$Member] = @{} }
$Accessors[$Member].Value = [ScriptBlock]::Create($Expression)
}
else { Write-Warning "The getter '$($Method.Name)' is skipped as it is not parameter-less." }
}
elseif ($Method.Name -Like 'set_*') {
if ($Parameters.Count -eq 1) {
$Expression = @"
`$TargetType = '$ClassName' -as [Type]
`$Method = `$TargetType.GetMethod('$($Method.Name)')
`$Method.Invoke(`$this, `$Args)
"@
if (-not $Accessors.Contains($Member)) { $Accessors[$Member] = @{} }
$Accessors[$Member].SecondValue = [ScriptBlock]::Create($Expression)
}
else { Write-Warning "The setter '$($Method.Name)' is skipped as it does not have a single parameter" }
}
}
foreach ($MemberName in $Accessors.get_Keys()) {
$TypeData = $Accessors[$MemberName]
if ($TypeData.Contains('Value')) {
$TypeData.TypeName = $ClassName
$TypeData.MemberType = 'ScriptProperty'
$TypeData.MemberName = $MemberName
$TypeData.Force = $Force
Update-TypeData @TypeData
}
else { Write-Warning "'[$ClassName].set_$MemberName()' accessor requires a '[$ClassName].get_$MemberName()' accessor." }
}
}
}
}
function Set-View {
<#
.SYNOPSIS
Sets the default view output
.LINK
https://stackoverflow.com/questions/77752014/how-to-type-convert-a-derived-class
#>
param(
[Parameter(ValueFromPipelineByPropertyName=$true)]
[ValidateNotNullOrEmpty()]
[string[]]$Class,
[Parameter(Position=0, ValueFromPipeline=$true, ValueFromPipelineByPropertyName=$true)]
[ValidateNotNullOrEmpty()]
[ScriptBlock]$ScriptBlock
)
process {
$ClassNames =
if ($Class) { $Class }
else {
$Caller = (Get-PSCallStack)[1]
if ($Caller.FunctionName -ne '<ScriptBlock>') {
$Caller.FunctionName
}
elseif ($Caller.ScriptName) {
$Ast = [System.Management.Automation.Language.Parser]::ParseFile($Caller.ScriptName, [ref]$Null, [ref]$Null)
$Ast.EndBlock.Statements.where{ $_.IsClass }.Name
}
}
foreach ($ClassName in $ClassNames) {
$FormatData = @"
<Configuration>
<ViewDefinitions>
<View>
<Name>$ClassName</Name>
<OutOfBand />
<ViewSelectedBy>
<TypeName>$ClassName</TypeName>
</ViewSelectedBy>
<CustomControl>
<CustomEntries>
<CustomEntry>
<CustomItem>
<ExpressionBinding>
<ScriptBlock>
<![CDATA[$($ScriptBlock.ToString())]]>
</ScriptBlock>
</ExpressionBinding>
</CustomItem>
</CustomEntry>
</CustomEntries>
</CustomControl>
</View>
</ViewDefinitions>
</Configuration>
"@
$TempFile = [IO.Path]::GetTempPath() + "$ClassName.ps1xml"
Out-File -InputObject $FormatData -LiteralPath $TempFile -Encoding ASCII
Update-FormatData -PrependPath $TempFile
}
}
}
Class PSLanguageType {
hidden static $_TypeCache = [Dictionary[String,Bool]]::new()
hidden Static PSLanguageType() {
[PSLanguageType]::_TypeCache['System.Management.Automation.PSCustomObject'] = $True # https://github.com/PowerShell/PowerShell/issues/20767
}
[Bool]IsRestricted($TypeName) {
if ($Null -eq $TypeName) { return $True } # Warning: a $Null is considered a restricted "type"!
$Type = $TypeName -as [Type]
if ($Null -eq $Type) { Throw 'Unknown type name: $TypeName' }
$TypeName = $Type.FullName
return $TypeName -in 'bool', 'array', 'hashtable'
}
[Bool]IsConstrained($TypeName) { # https://stackoverflow.com/a/64806919/1701026
if ($Null -eq $TypeName) { return $True } # Warning: a $Null is considered a constrained "type"!
$Type = $TypeName -as [Type]
if ($Null -eq $Type) { Throw 'Unknown type name: $TypeName' }
$TypeName = $Type.FullName
if (-not [PSLanguageType]::_TypeCache.ContainsKey($TypeName)) {
[PSLanguageType]::_TypeCache[$TypeName] = try {
$ConstrainedSession = [PowerShell]::Create()
$ConstrainedSession.RunSpace.SessionStateProxy.LanguageMode = 'Constrained'
$ConstrainedSession.AddScript("[$TypeName]0").Invoke().Count -ne 0 -or
$ConstrainedSession.Streams.Error[0].FullyQualifiedErrorId -ne 'ConversionSupportedOnlyToCoreTypes'
} catch { $False }
}
return [PSLanguageType]::_TypeCache[$TypeName]
}
}
New-Variable -Scope Global -Name PSLanguageType -Value ([PSLanguageType]::new()) -Force
Class PSInstance {
static [Object]Create($Object) {
if ($Null -eq $Object) { return $Null }
elseif ($Object -is [String]) {
$String = if ($Object.StartsWith('[') -and $Object.EndsWith(']')) { $Object.SubString(1, ($Object.Length - 2)) } else { $Object }
Switch -Regex ($String) {
'^((System\.)?String)?$' { return '' }
'^(System\.)?Array$' { return ,@() }
'^(System\.)?Object\[\]$' { return ,@() }
'^((System\.)?Collections\.Hashtable\.)?hashtable$' { return @{} }
'^((System\.)?Management\.Automation\.)?ScriptBlock$' { return {} }
'^((System\.)?Collections\.Specialized\.)?Ordered(Dictionary)?$' { return [Ordered]@{} }
'^((System\.)?Management\.Automation\.)?PS(Custom)?Object$' { return [PSCustomObject]@{} }
}
$Type = $String -as [Type]
if (-not $Type) { Throw "Unknown type: [$Object]" }
}
elseif ($Object -is [Type]) {
$Type = $Object.UnderlyingSystemType
if ("$Type" -eq 'string') { Return '' }
elseif ("$Type" -eq 'array') { Return ,@() }
elseif ("$Type" -eq 'scriptblock') { Return {} }
}
else {
if ($Object -is [Object[]]) { Return ,@() }
elseif ($Object -is [ScriptBlock]) { Return {} }
elseif ($Object -is [PSCustomObject]) { Return [PSCustomObject]::new() }
$Type = $Object.GetType()
}
try { return [Activator]::CreateInstance($Type) } catch { throw $_ }
}
}
# ____ ____ ____ _ _ _
# | _ \/ ___/ ___| ___ _ __(_) __ _| (_)_______
# | |_) \___ \___ \ / _ \ '__| |/ _` | | |_ / _ \
# | __/ ___) |__) | __/ | | | (_| | | |/ / __/
# |_| |____/____/ \___|_| |_|\__,_|_|_/___\___|
Class PSKeyExpression {
hidden static [Regex]$UnquoteMatch = '^[\?\*\p{L}\p{Lt}\p{Lm}\p{Lo}_][\?\*\p{L}\p{Lt}\p{Lm}\p{Lo}\p{Nd}_]*$' # https://stackoverflow.com/questions/62754771/unquoted-key-rules-and-best-practices
hidden $Key
hidden [PSLanguageMode]$LanguageMode = 'Restricted'
hidden [Bool]$Compress
hidden [Int]$MaximumLength
PSKeyExpression($Key) { $this.Key = $Key }
PSKeyExpression($Key, [PSLanguageMode]$LanguageMode) { $this.Key = $Key; $this.LanguageMode = $LanguageMode }
PSKeyExpression($Key, [PSLanguageMode]$LanguageMode, [Bool]$Compress) { $this.Key = $Key; $this.LanguageMode = $LanguageMode; $this.Compress = $Compress }
PSKeyExpression($Key, [int]$MaximumLength) { $this.Key = $Key; $this.MaximumLength = $MaximumLength }
[String]ToString() {
$Name = $this.Key
if ($Name -is [byte] -or $Name -is [int16] -or $Name -is [int32] -or $Name -is [int64] -or
$Name -is [sbyte] -or $Name -is [uint16] -or $Name -is [uint32] -or $Name -is [uint64] -or
$Name -is [float] -or $Name -is [double] -or $Name -is [decimal]) {
if ($this.MaximumLength -and $Name.Length -gt $this.MaximumLength) {
return "$Name".SubString(0, ($this.MaximumLength - 3)) + '...'
}
return $Name
}
if ($this.MaximumLength) { $Name = "$Name" }
if ($Name -is [String]) {
if ($Name -cMatch [PSKeyExpression]::UnquoteMatch) {
if ($this.MaximumLength -and $Name.Length -gt $this.MaximumLength) {
return $Name.SubString(0, ($this.MaximumLength - 3)) + '...'
}
return $Name
}
$Name = $Name.Replace("'", "''")
if ($this.MaximumLength -and $this.MaximumLength -and $Name.Length -gt $this.MaximumLength - 2) {
$Name = $Name.SubString(0, ($this.MaximumLength - 5)) + '...'
}
return "'$Name'"
}
else {
$Node = [PSNode]::ParseInput($Name, 2) # There is no way (yet) to expand keys more than 2 levels
return [PSSerialize]::new($Node, $this.LanguageMode, -$this.Compress)
}
}
}
Class PSSerialize {
hidden static [String[]]$Parameters = 'LanguageMode', 'Explicit', 'FullTypeName', 'HighFidelity', 'Indent', 'ExpandSingleton'
hidden [PSLanguageMode]$LanguageMode = 'Restricted'
hidden [Int]$ExpandDepth = [Int]::MaxValue
hidden [Bool]$Explicit
hidden [Bool]$FullTypeName
hidden [bool]$HighFidelity
hidden [String]$Indent = ' '
hidden [Bool]$ExpandSingleton
hidden static [Dictionary[String,Bool]]$IsConstrainedType = [Dictionary[String,Bool]]::new()
hidden static [Dictionary[String,Bool]]$HasStringConstructor = [Dictionary[String,Bool]]::new()
# The dictionary below defines the round trip property. Unless the `-HighFidelity` switch is set,
# the serialization will stop (even it concerns a `PSCollectionNode`) when the specific property
# type is reached.
# * An empty string will return the string representation of the object: `"<Object>"`
# * Any other string will return the string representation of the object property: `"$(<Object>.<Property>)"`
# * A ScriptBlock will be invoked and the result will be used for the object value
hidden static $RoundTripProperty = @{
'Microsoft.Management.Infrastructure.CimInstance' = ''
'Microsoft.Management.Infrastructure.CimSession' = 'ComputerName'
'Microsoft.PowerShell.Commands.ModuleSpecification' = 'Name'
'System.DateTime' = { $($Input).ToString('o') }
'System.DirectoryServices.DirectoryEntry' = 'Path'
'System.DirectoryServices.DirectorySearcher' = 'Filter'
'System.Globalization.CultureInfo' = 'Name'
'Microsoft.PowerShell.VistaCultureInfo' = 'Name'
'System.Management.Automation.AliasAttribute' = 'AliasNames'
'System.Management.Automation.ArgumentCompleterAttribute' = 'ScriptBlock'
'System.Management.Automation.ConfirmImpact' = ''
'System.Management.Automation.DSCResourceRunAsCredential' = ''
'System.Management.Automation.ExperimentAction' = ''
'System.Management.Automation.OutputTypeAttribute' = 'Type'
'System.Management.Automation.PSCredential' = { ,@($($Input).UserName, @("(""$($($Input).Password | ConvertFrom-SecureString)""", '|', 'ConvertTo-SecureString)')) }
'System.Management.Automation.PSListModifier' = 'Replace'
'System.Management.Automation.PSReference' = 'Value'
'System.Management.Automation.PSTypeNameAttribute' = 'PSTypeName'
'System.Management.Automation.RemotingCapability' = ''
'System.Management.Automation.ScriptBlock' = 'Ast'
'System.Management.Automation.SemanticVersion' = ''
'System.Management.Automation.ValidatePatternAttribute' = 'RegexPattern'
'System.Management.Automation.ValidateScriptAttribute' = 'ScriptBlock'
'System.Management.Automation.ValidateSetAttribute' = 'ValidValues'
'System.Management.Automation.WildcardPattern' = { $($Input).ToWql().Replace('%', '*').Replace('_', '?').Replace('[*]', '%').Replace('[?]', '_') }
'Microsoft.Management.Infrastructure.CimType' = ''
'System.Management.ManagementClass' = 'Path'
'System.Management.ManagementObject' = 'Path'
'System.Management.ManagementObjectSearcher' = { $($Input).Query.QueryString }
'System.Net.IPAddress' = 'IPAddressToString'
'System.Net.IPEndPoint' = { $($Input).Address.Address; $($Input).Port }
'System.Net.Mail.MailAddress' = 'Address'
'System.Net.NetworkInformation.PhysicalAddress' = ''
'System.Security.Cryptography.X509Certificates.X500DistinguishedName' = 'Name'
'System.Security.SecureString' = { ,[string[]]("(""$($Input | ConvertFrom-SecureString)""", '|', 'ConvertTo-SecureString)') }
'System.Text.RegularExpressions.Regex' = ''
'System.Uri' = 'OriginalString'
'System.Version' = ''
'System.Void' = $Null
}
hidden [System.Text.StringBuilder]$StringBuilder = [System.Text.StringBuilder]::new()
hidden [Int]$Offset = 0
hidden [Int]$LineNumber = 1
PSSerialize($Object) { $this.Serialize($Object) }
PSSerialize($Object, $LanguageMode, $ExpandDepth) {
$this.LanguageMode = $LanguageMode
$this.ExpandDepth = $ExpandDepth
$this.Serialize($Object)
}
PSSerialize(
$Object,
$LanguageMode = 'Restricted',
$ExpandDepth = [Int]::MaxValue,
$Explicit = $False,
$FullTypeName = $False,
$HighFidelity = $False,
$ExpandSingleton = $False,
$Indent = ' '
) {
$this.LanguageMode = $LanguageMode
$this.ExpandDepth = $ExpandDepth
$this.Explicit = $Explicit
$this.FullTypeName = $FullTypeName
$this.HighFidelity = $HighFidelity
$this.ExpandSingleton = $ExpandSingleton
$this.Indent = $Indent
$this.Serialize($Object)
}
PSSerialize($Object, [HashTable]$Parameters) {
foreach ($Name in $Parameters.get_Keys()) { # https://github.com/PowerShell/PowerShell/issues/13307
if ($Name -notin [PSSerialize]::Parameters) { Throw "Unknown parameter: $Name." }
$this.GetType().GetProperty($Name).SetValue($this, $Parameters[$Name])
}
$this.Serialize($Object)
}
[String]Serialize($Object) {
if ($this.LanguageMode -eq 'NoLanguage') { Throw 'The language mode "NoLanguage" is not supported.' }
if (-not ('ConstrainedLanguage', 'FullLanguage' -eq $this.LanguageMode)) {
if ($this.FullTypeName) { Write-Warning 'The FullTypeName switch requires Constrained - or FullLanguage mode.' }
if ($this.Explicit) { Write-Warning 'The Explicit switch requires Constrained - or FullLanguage mode.' }
}
if ($Object -is [PSNode]) { $Node = $Object } else { $Node = [PSNode]::ParseInput($Object) }
$this.Iterate($Node)
return $this.StringBuilder.ToString()
}
hidden Iterate([PSNode]$Node) {
$Value = $Node.Value
if ($Null -eq $Value) {
$this.StringBuilder.Append('$Null')
return
}
$Type = $Node.ValueType
$TypeName = "$Type"
$TypeInitializer =
if ($Null -ne $Type -and (
$this.LanguageMode -eq 'Full' -or (
$this.LanguageMode -eq 'Constrained' -and
$Global:PSLanguageType.IsConstrained($Type) -and (
$this.Explicit -or -not (
$Type.IsPrimitive -or
$Value -is [String] -or
$Value -is [Object[]] -or
$Value -is [Hashtable]
)
)
)
)
) {
if ($this.FullTypeName) {
if ($Type.FullName -eq 'System.Management.Automation.PSCustomObject' ) { '[System.Management.Automation.PSObject]' } # https://github.com/PowerShell/PowerShell/issues/2295
else { "[$($Type.FullName)]" }
}
elseif ($TypeName -eq 'System.Object[]') { "[array]" }
elseif ($TypeName -eq 'System.Management.Automation.PSCustomObject') { "[PSCustomObject]" }
else { "[$TypeName]" }
}
if ($TypeInitializer) { $this.StringBuilder.Append($TypeInitializer) }
if ($Node -is [PSLeafNode] -or (-not $this.HighFidelity -and [PSSerialize]::RoundTripProperty.Contains($Node.ValueType.FullName))) {
$Expression =
if ([PSSerialize]::RoundTripProperty.Contains($Node.ValueType.FullName)) {
$Property = [PSSerialize]::RoundTripProperty[$Node.ValueType.FullName]
if ($Null -eq $Property) { $Null }
elseif ($Property -is [String]) { if ($Property) { ,$Value.$Property } else { "$Value" } }
elseif ($Property -is [ScriptBlock] ) { Invoke-Command $Property -InputObject $Value }
elseif ($Property -is [HashTable]) { if ($this.LanguageMode -eq 'Restricted') { $Null } else { @{} } }
elseif ($Property -is [Array]) { @($Property.foreach{ $Value.$_ }) }
else { Throw "Unknown round trip property type: $($Property.GetType())."}
}
elseif ($Type.IsPrimitive) { $Value }
elseif (-not $Type.GetConstructors()) { "$TypeName" }
elseif ($Type.GetMethod('ToString', [Type[]]@())) { $Value.ToString() }
elseif ($Value -is [Collections.ICollection]) { ,$Value }
else { $Value } # Handle compression
if ($Null -eq $Expression) { $Expression = '$Null' }
elseif ($Expression -is [Bool]) { $Expression = "`$$Value" }
elseif ($Expression -is [Char]) { $Expression = "'$Value'" }
elseif ($Expression -is [ScriptBlock]) { $Expression = $Expression.Ast.Extent.Text }
elseif ($Expression -is [HashTable]) { $Expression = '@{}' }
elseif ($Expression -is [Array]) {
$Space = if ($this.ExpandDepth -ge 0) { ' ' }
$New = if ($TypeInitializer) { '::new(' } else { '@(' }
$Expression = $New + ($Expression.foreach{
if ($Null -eq $_) { '$Null' }
elseif ($_.GetType().IsPrimitive) { "$_" }
elseif ($_ -is [Array]) { $_ -Join $Space }
else { "'$_'" }
} -Join ",$Space") + ')'
}
elseif ($Type -and $Type.IsPrimitive) { }
else {
if ($Expression -isnot [String]) { $Expression = "$Expression" }
$Expression = if ($Expression.Contains("`n")) {
"@'" + [Environment]::NewLine + "$Expression".Replace("'", "''") + [Environment]::NewLine + "'@"
}
else {
"'" + "$Expression".Replace("'", "''") + "'"
}
}
$this.StringBuilder.Append($Expression)
}
elseif ($Node -is [PSListNode]) {
$this.StringBuilder.Append('@(')
$this.Offset++
$StartLine = $this.LineNumber
$Index = 0
$ChildNodes = $Node.get_ChildNodes()
$ExpandSingle = $this.ExpandSingleton -or $ChildNodes.Count -gt 1 -or ($ChildNodes.Count -eq 1 -and $ChildNodes[0] -isnot [PSLeafNode])
$ChildNodes.foreach{
if ($Index++) {
$this.StringBuilder.Append(',')
$this.NewWord()
}
elseif ($ExpandSingle) { $this.NewWord('') }
$this.Iterate($_)
}
$this.Offset--
if ($this.LineNumber -gt $StartLine) { $this.NewWord('') }
$this.StringBuilder.Append(')')
}
else { # if ($Node -is [PSMapNode]) {
$ChildNodes = $Node.get_ChildNodes()
if ($ChildNodes) {
$this.StringBuilder.Append('@{')
$this.Offset++
$StartLine = $this.LineNumber
$Index = 0
$ExpandSingle = $this.ExpandSingleton -or $ChildNodes.Count -gt 1 -or $ChildNodes[0] -isnot [PSLeafNode]
$ChildNodes.foreach{
if ($Index++) {
$Separator = if ($this.ExpandDepth -ge 0) { '; ' } else { ';' }
$this.NewWord($Separator)
}
elseif ($this.ExpandDepth -ge 0) {
if ($ExpandSingle) { $this.NewWord() } else { $this.StringBuilder.Append(' ') }
}
$Key = [PSKeyExpression]::new($_.Name, $this.LanguageMode, ($this.ExpandDepth -lt 0))
$this.StringBuilder.Append($Key)
if ($this.ExpandDepth -ge 0) { $this.StringBuilder.Append(' = ') } else { $this.StringBuilder.Append('=') }
$this.Iterate($_)
}
$this.Offset--
if ($this.LineNumber -gt $StartLine) { $this.NewWord() }
elseif ($this.ExpandDepth -ge 0) { $this.StringBuilder.Append(' ') }
$this.StringBuilder.Append('}')
}
elseif ($Node -is [PSObjectNode] -and $TypeInitializer) { $this.StringBuilder.Append('::new()') }
else { $this.StringBuilder.Append('@{}') }
}
}
hidden NewWord() { $this.NewWord(' ') }
hidden NewWord([String]$Separator) {
if ($this.Offset -le $this.ExpandDepth) {
$this.StringBuilder.AppendLine()
for($i = $this.Offset; $i -gt 0; $i--) {
$this.StringBuilder.Append($this.Indent)
}
$this.LineNumber++
}
else {
$this.StringBuilder.Append($Separator)
}
}
[String] ToString() {
return $this.StringBuilder.ToString()
}
}
Class PSStringify : PSSerialize {
hidden static [int]$MaximumListCount = 3
hidden static [int]$MaximumMapCount = 3
hidden static [int]$MaximumStringLength = 48
hidden static [int]$MaximumKeyLength = 12
hidden static [int]$MaximumValueLength = 16
PSStringify($Object) { $this.Serialize($Object) }
}
# ____ ____ ____ _ _ _
# | _ \/ ___|| _ \ ___ ___ ___ _ __(_) __ _| (_)_______
# | |_) \___ \| | | |/ _ \/ __|/ _ \ '__| |/ _` | | |_ / _ \
# | __/ ___) | |_| | __/\__ \ __/ | | | (_| | | |/ / __/
# |_| |____/|____/ \___||___/\___|_| |_|\__,_|_|_/___\___|
Class PSDeserialize {
hidden static [String[]]$Parameters = 'LanguageMode', 'ArrayType', 'HashTableType'
hidden static PSDeserialize() { Use-ClassAccessors }
hidden $_Object
[PSLanguageMode]$LanguageMode = 'Restricted'
[Type]$ArrayType = 'Array' -as [Type]
[Type]$HashTableType = 'HashTable' -as [Type]
[String] $Expression
PSDeserialize([String]$Expression) { $this.Expression = $Expression }
PSDeserialize(
$Expression,
$LanguageMode = 'Restricted',
$ArrayType = $Null,
$HashTableType = $Null
) {
if ($this.LanguageMode -eq 'NoLanguage') { Throw 'The language mode "NoLanguage" is not supported.' }
$this.Expression = $Expression
$this.LanguageMode = $LanguageMode
if ($Null -ne $ArrayType) { $this.ArrayType = $ArrayType }
if ($Null -ne $HashTableType) { $this.HashTableType = $HashTableType }
}
hidden [Object] get_Object() {
if ($Null -eq $this._Object) {
$Ast = [System.Management.Automation.Language.Parser]::ParseInput($this.Expression, [ref]$null, [ref]$Null)
$this._Object = $this.ParseAst([Ast]$Ast)
}
return $this._Object
}
hidden [Object] ParseAst([Ast]$Ast) {
# Write-Host 'Ast type:' "$($Ast.getType())"
$Type = $Null
if ($Ast -is [ConvertExpressionAst]) {
$FullTypeName = $Ast.Type.TypeName.FullName
if (
$this.LanguageMode -eq 'Full' -or (
$this.LanguageMode -eq 'Constrained' -and
$Global:PSLanguageType.IsConstrained($FullTypeName)
)
) {
try { $Type = $FullTypeName -as [Type] } catch { write-error $_ }
}
$Ast = $Ast.Child
}
if ($Ast -is [ScriptBlockAst]) {
$List = [List[Object]]::new()
if ($Null -ne $Ast.BeginBlock) { $Ast.BeginBlock.Statements.ForEach{ $List.Add($this.ParseAst($_)) } }
if ($Null -ne $Ast.ProcessBlock) { $Ast.ProcessBlock.Statements.ForEach{ $List.Add($this.ParseAst($_)) } }
if ($Null -ne $Ast.EndBlock) { $Ast.EndBlock.Statements.ForEach{ $List.Add($this.ParseAst($_)) } }
if ($List.Count -eq 1) { return $List[0] } else { return @($List) }
}
elseif ($Ast -is [PipelineAst]) {
$Elements = $Ast.PipelineElements
if (-not $Elements.Count) { return @() }
elseif ($Elements -is [CommandAst]) {
return $Null #85 ConvertFrom-Expression: convert function/cmdlet calls to Objects
}
elseif ($Elements.Expression.Count -eq 1) { return $this.ParseAst($Elements.Expression[0]) }
else { return $Elements.Expression.Foreach{ $this.ParseAst($_) } }
}
elseif ($Ast -is [ArrayLiteralAst] -or $Ast -is [ArrayExpressionAst]) {
if (-not $Type -or 'System.Object[]', 'System.Array' -eq $Type.FullName) { $Type = $this.ArrayType }
if ($Ast -is [ArrayLiteralAst]) { $Value = $Ast.Elements.foreach{ $this.ParseAst($_) } }
else { $Value = $Ast.SubExpression.Statements.foreach{ $this.ParseAst($_) } }
if ('System.Object[]', 'System.Array' -eq $Type.FullName) {
if ($Value -isnot [Array]) { $Value = @($Value) } # Prevent single item array unrolls
}
else { $Value = $Value -as $Type }
return $Value
}
elseif ($Ast -is [HashtableAst]) {
if (-not $Type -or $Type.FullName -eq 'System.Collections.Hashtable') { $Type = $this.HashTableType }
$IsPSCustomObject = "$Type" -in
'PSCustomObject',
'System.Management.Automation.PSCustomObject',
'psobject',
'System.Management.Automation.PSObject'
if ($Type.FullName -eq 'System.Collections.Hashtable') { $Map = @{} } # Case insensitive
elseif ($IsPSCustomObject) { $Map = [Ordered]@{} }
else { $Map = New-Object -Type $Type }
$Ast.KeyValuePairs.foreach{
if ( $Map -is [Collections.IDictionary]) { $Map.Add($_.Item1.Value, $this.ParseAst($_.Item2)) }
else { $Map."$($_.Item1.Value)" = $this.ParseAst($_.Item2) }
}
if ($IsPSCustomObject) { return [PSCustomObject]$Map } else { return $Map }
}
elseif ($Ast -is [ConstantExpressionAst]) {
if ($Type) { $Value = $Ast.Value -as $Type } else { $Value = $Ast.Value }
return $Value
}
elseif ($Ast -is [VariableExpressionAst]) {
$Value = switch ($Ast.VariablePath.UserPath) {
Null { $Null }
True { $True }
False { $False }
PSCulture { (Get-Culture).ToString() }
PSUICulture { (Get-UICulture).ToString() }
Default { $Ast.Extent.Text }
}
return $Value
}
else { return $Null }
}
}
# __ __ _
# \ \/ /__| |_ __
# \ // _` | '_ \
# / \ (_| | | | |
# /_/\_\__,_|_| |_|
enum XdnType { Root; Ancestor; Index; Child; Descendant; Equals; Error = 99 }
enum XdnColorName { Reset; Regular; Literal; WildCard; Operator; Error = 99 }
class XdnColor {
Static [String]$Regular
Static [String]$Literal
Static [String]$Wildcard
Static [String]$Extended
Static [String]$Operator
Static [String]$Error
Static [String]$Reset
static XdnColor() {
$PSReadLineOption = try { Get-PSReadLineOption -ErrorAction SilentlyContinue } catch { $Null }
[XdnColor]::Reset = [char]0x1b + '[39m'
[XdnColor]::Regular = $PSReadLineOption.VariableColor
[XdnColor]::WildCard = $PSReadLineOption.EmphasisColor
[XdnColor]::Extended = $PSReadLineOption.StringColor
[XdnColor]::Operator = $PSReadLineOption.CommandColor
[XdnColor]::Error = $PSReadLineOption.ErrorColor
}
}
class XdnName {
hidden [Bool]$_Literal
hidden $_IsVerbatim
hidden $_ContainsWildcard
hidden $_Value
hidden Initialize($Value, $Literal) {
$this._Value = $Value
if ($Null -ne $Literal) { $this._Literal = $Literal } else { $this._Literal = $this.IsVerbatim() }
if ($this._Literal) {
$XdnName = [XdnName]::new()
$XdnName._ContainsWildcard = $False
}
else {
$XdnName = [XdnName]::new()
$XdnName._ContainsWildcard = $null
}
}
XdnName() {}
XdnName($Value) { $this.Initialize($Value, $null) }
XdnName($Value, [Bool]$Literal) { $this.Initialize($Value, $Literal) }
static [XdnName]Literal($Value) { return [XdnName]::new($Value, $true) }
static [XdnName]Expression($Value) { return [XdnName]::new($Value, $false) }
[Bool] IsVerbatim() {
if ($Null -eq $this._IsVerbatim) {
$this._IsVerbatim = $this._Value -is [String] -and $this._Value -Match '^[\?\*\p{L}\p{Lt}\p{Lm}\p{Lo}_][\?\*\p{L}\p{Lt}\p{Lm}\p{Lo}\p{Nd}_]*$' # https://stackoverflow.com/questions/62754771/unquoted-key-rules-and-best-practices
}
return $this._IsVerbatim
}
[Bool] ContainsWildcard() {
if ($Null -eq $this._ContainsWildcard) {
$this._ContainsWildcard = $this._Value -is [String] -and $this._Value -Match '(?<=([^`]|^)(``)*)[\?\*]'
}
return $this._ContainsWildcard
}
[Bool] Equals($Object) {
if ($this._Literal) { return $this._Value -eq $Object }
elseif ($this.ContainsWildcard()) { return $Object -Like $this._Value }
else { return $this._Value -eq $Object }
}
[String] ToString($Colored) {
$Color = if ($Colored) {
if ($this._Literal) { [XdnColor]::Regular }
elseif (-not $this.IsVerbatim()) { [XdnColor]::Extended }
elseif ($this.ContainsWildcard()) { [XdnColor]::Wildcard }
else { [XdnColor]::Regular }
}
$String =
if ($this._Literal) { "'" + "$($this._Value)".Replace("'", "''") + "'" }
else { "$($this._Value)" -replace '(?<!([^`]|^)(``)*)[\.\[\~\=\/]', '`${0}' } # Escape any Xdn operator (that isn't yet escaped)
$Reset = if ($Colored) { [XdnColor]::Reset }
return $Color + $String + $Reset
}
[String] ToString() { return $this.ToString($False) }
[String] ToColoredString() { return $this.ToString($True) }
static XdnName() {
Set-View { $_.ToString($True) }
}
}
class XdnPath {
hidden static $_PSReadLineOption
hidden $_Entries = [List[KeyValuePair[XdnType, Object]]]::new()
hidden [Object]get_Entries() { return ,$this._Entries }
XdnPath ([String]$Path) { $this.FromString($Path, $False) }
XdnPath ([String]$Path, [Bool]$Literal) { $this.FromString($Path, $Literal) }
XdnPath ([PSNodePath]$Path) {
foreach ($Node in $Path.Nodes) {
Switch ($Node.NodeOrigin) {
Root { $this.Add('Root', $Null) }
List { $this.Add('Index', $Node.Name) }
Map { $this.Add('Child', [XdnName]$Node.Name) }
}
}
}
hidden AddError($Value) {
$this._Entries.Add([KeyValuePair[XdnType, Object]]::new('Error', $Value))
}
Add ($EntryType, $Value) {
if ($EntryType -eq '/') {
if ($this._Entries.Count -eq 0) { $this.AddError($Value) }
elseif ($this._Entries[-1].Key -NotIn 'Child', 'Descendant', 'Equals') { $this.AddError($Value) }
else {
$EntryValue = $this._Entries[-1].Value
if ($EntryValue -IsNot [IList]) { $EntryValue = [List[Object]]$EntryValue }
$EntryValue.Add($Value)
$this._Entries[-1] = [KeyValuePair[XdnType, Object]]::new($this._Entries[-1].Key, $EntryValue)
}
}
else {
$XdnType = Switch ($EntryType) { '.' { 'Child' } '~' { 'Descendant' } '=' { 'Equals' } default { $EntryType } }
if ($XdnType -in [XdnType].GetEnumNames()) {
$this._Entries.Add([KeyValuePair[XdnType, Object]]::new($XdnType, $Value))
} else { $this.AddError($Value) }
}
}
hidden FromString ([String]$Path, [Bool]$Literal) {
$XdnOperator = $Null
if (-not $this._Entries.Count) {
$IsRoot = if ($Literal) { $Path -NotMatch '^\.' } else { $Path -NotMatch '^(?<=([^`]|^)(``)*)\.' }
if ($IsRoot) {
$this.Add('Root', $Null)
$XdnOperator = 'Child'
}
}
$Length = [Int]::MaxValue
while ($Path) {
if ($Path.Length -ge $Length) { break }
$Length = $Path.Length
if ($Path[0] -in "'", '"') {
if (-not $XdnOperator) { $XdnOperator = 'Child' }
$Ast = [Parser]::ParseInput($Path, [ref]$Null, [ref]$Null)
$StringAst = $Ast.EndBlock.Statements.Find({ $args[0] -is [StringConstantExpressionAst] }, $False)
if ($Null -ne $StringAst) {
$this.Add($XdnOperator, [XdnName]::Literal($StringAst[0].Value))
$Path = $Path.SubString($StringAst[0].Extent.EndOffset)
}
else { # Probably a quoting error
$this.Add($XdnOperator, [XdnName]::Literal($Path, $True))
$Path = $Null
}
}
else {
$Match = if ($Literal) { [regex]::Match($Path, '[\.\[]') } else { [regex]::Match($Path, '(?<=([^`]|^)(``)*)[\.\[\~\=\/]') }
$Match = [regex]::Match($Path, '(?<=([^`]|^)(``)*)[\.\[\~\=\/]')
if ($Match.Success -and $Match.Index -eq 0) { # Operator
$IndexEnd = if ($Match.Value -eq '[') { $Path.IndexOf(']') }
$Ancestors = if ($Match.Value -eq '.' -and $Path -Match '^\.\.+') { $Matches[0].Length - 1 }
if ($IndexEnd -gt 0) {
$Index = $Path.SubString(1, ($IndexEnd - 1))
$CommandAst = [Parser]::ParseInput($Index, [ref]$Null, [ref]$Null).EndBlock.Statements.PipelineElements
if ($CommandAst -is [CommandExpressionAst]) { $Index = $CommandAst.expression.Value }
$this.Add('Index', $Index)
$Path = $Path.SubString(($IndexEnd + 1))
$XdnOperator = $Null
}
elseif ($Ancestors) {
$this.Add('Ancestor', $Ancestors)
$Path = $Path.Substring($Ancestors + 1)
$XdnOperator = 'Child'
}
elseif ($Match.Value -in '.', '~', '=', '/' -and $Match.Value -ne $XdnOperator) {
$XdnOperator = $Match.Value
$Path = $Path.Substring(1)
}
else {
$XdnOperator = 'Error'
$this.Add($XdnOperator, $Match.Value)
$Path = $Path.Substring(1)
}
}
elseif ($Match.Success) {
if (-not $XdnOperator) { $XdnOperator = 'Child' }
$Name = $Path.SubString(0, $Match.Index)
$Value = if ($Literal) { [XdnName]::Literal($Name) } else { [XdnName]::Expression($Name) }
$this.Add($XdnOperator, $Value)
$Path = $Path.SubString($Match.Index)
$XdnOperator = $Null
}
else {
$Value = if ($Literal) { [XdnName]::Literal($Path) } else { [XdnName]::Expression($Path)}
$this.Add($XdnOperator, $Value)
$Path = $Null
}
}
}
}
[String] ToString([String]$VariableName, [Bool]$Colored) {
$RegularColor = if ($Colored) { [XdnColor]::Regular }
$OperatorColor = if ($Colored) { [XdnColor]::Operator }
$ErrorColor = if ($Colored) { [XdnColor]::Error }
$ResetColor = if ($Colored) { [char]0x1b + '[39m' }
$Path = [System.Text.StringBuilder]::new()
$PreviousEntry = $Null
foreach ($Entry in $this._Entries) {
$Value = $Entry.Value
$Append = Switch ($Entry.Key) {
Root { "$OperatorColor$VariableName$ResetColor" }
Ancestor { "$OperatorColor$('.' * $Value)$ResetColor" }
Index {
$Dot = if (-not $PreviousEntry -or $PreviousEntry.Key -eq 'Ancestor') { "$OperatorColor." }
if ([int]::TryParse($Value, [Ref]$Null)) { "$Dot$RegularColor[$Value]$ResetColor" }
else { "$ErrorColor[$Value]$ResetColor" }
}
Child { "$RegularColor.$(@($Value).foreach{ $_.ToString($Colored) } -Join ""$OperatorColor/"")" }
Descendant { "$OperatorColor~$(@($Value).foreach{ $_.ToString($Colored) } -Join ""$OperatorColor/"")" }
Equals { "$OperatorColor=$(@($Value).foreach{ $_.ToString($Colored) } -Join ""$OperatorColor/"")" }
Default { "$ErrorColor$($Value)$ResetColor" }
}
$Path.Append($Append)
$PreviousEntry = $Entry
}