Private/ConvertFrom-YAMLDocument.ps1
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function ConvertFrom-YAMLDocument { <# .SYNOPSIS Converts from a YAMLdotNet Document .DESCRIPTION A detailed description of the ConvertFrom-YAMLDocument function. .PARAMETER TheNode A description of the TheNode parameter. .EXAMPLE PS C:\> ConvertFrom-YAMLDocument -TheNode $value1 .EXAMPLE $result=ConvertFrom-YAMLDocument $document -verbose $result|Convertto-YAML .NOTES =========================================================================== Created on: 22-Feb-16 7:57 PM Created by: Phil Factor Organization: Phil Factory Filename: =========================================================================== #> [CmdletBinding()] param ( [object]$TheNode #you pass in a node that, when you call it, will be the root node. ) #initialise variables that are needed for providing the correct powershell data type for a string-based value. [bool]$ABool = $false [int]$AnInt = $null [long]$ALong = $null [decimal]$adecimal = $null [single]$ASingle = $null [double]$ADouble = $null [datetime]$ADatetime = '1/1/2000' $TheTypeOfNode = $TheNode.GetType().Name # determine this Write-Verbose "$TheTypeOfNode = $($theNode)" #just so see what is going on $Style = $TheNode.Style $Tag = $TheNode.Tag $Anchor = $TheNode.Anchor Write-Verbose "Tag=$tag, Style=$style, Anchor=$anchor" #if it is the document, then call recursively with the rrot node if ($TheTypeOfNode -eq 'YamlDocument') { $TheObject = ConvertFrom-YAMLDocument $TheNode.RootNode } elseif ($TheTypeOfNode -eq 'YamlMappingNode') #ah mapping nodes { $TheObject = [ordered]@{ } $theNode | ForEach-Object{ $TheObject.($_.Key.Value) = ConvertFrom-YAMLDocument $_.Value } } elseif ($TheTypeOfNode -eq 'YamlScalarNode' -or $TheTypeOfNode -eq 'Object[]') { $value = "$($theNode)" if (! $tag) { $value = switch -Regex ($value) { # if it is one of the allowed boolean values '(?i)\A(?:on|yes)\z' { 'true' break } #Deal with all the possible YAML boolenas '(?i)\A(?:off|no)\z' { 'false' break } default { $value } } } $TheObject = if ($tag -ieq 'tag:yaml.org,2002:str') { [string]$Value } #it is specified as a string elseif ($tag -ieq 'tag:yaml.org,2002:bool') { [bool]$Value } #it is specified as a boolean elseif ($tag -ieq 'tag:yaml.org,2002:float') { [double]$Value } #it is specified as adouble elseif ($tag -ieq 'tag:yaml.org,2002:int') { [int]$Value } #it is specified as a int elseif ($tag -ieq 'tag:yaml.org,2002:null') { $null } #it is specified as a null elseif ($tag -ieq 'tag:yaml.org,2002:timestamp') {[datetime]$Value} #it is date/timestamp elseif ($tag -ieq 'tag:yaml.org,2002:binary') {[System.Convert]::FromBase64String($Value)} elseif ([int]::TryParse($Value, [ref]$AnInt)) { $AnInt } #is it a short integer elseif ([bool]::TryParse($Value, [ref]$ABool)) { $ABool } #is it a boolean elseif ([long]::TryParse($Value, [ref]$ALong)) { $ALong } #is it a long integer elseif ([decimal]::TryParse($Value, [ref]$ADecimal)) { $ADecimal } #is it a decimal elseif ([single]::TryParse($Value, [ref]$ASingle)) { $ASingle } #is it a single float elseif ([double]::TryParse($Value, [ref]$ADouble)) { $ADouble } #is it a double float elseif ([datetime]::TryParse($Value, [ref]$ADatetime)) { $ADatetime } #is it a datetime else { [string]$Value } } elseif ($TheTypeOfNode -eq 'Object[]') #sometimes you just get a raw object, not a node { $TheObject = $theNode.Value #so you return its value } elseif ($TheTypeOfNode -eq 'YamlSequenceNode') #in which case you { $TheObject = @() $theNode | ForEach-Object{ $TheObject += ConvertFrom-YAMLDocument $_ } return ,$TheObject } else { Write-Verbose "Unrecognised token $TheTypeOfNode" } Return $TheObject } |