ConvertFrom-SourceTable.ps1
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<#PSScriptInfo
.VERSION 0.3.5 .GUID 0019a810-97ea-4f9a-8cd5-4babecdc916b .AUTHOR iRon .DESCRIPTION Converts a fixed column table to objects. .COMPANYNAME .COPYRIGHT .TAGS Read Input Convert Resource Table Format MarkDown .LICENSEURI https://github.com/iRon7/ConvertFrom-SourceTable/LICENSE.txt .PROJECTURI https://github.com/iRon7/ConvertFrom-SourceTable .ICONURI https://raw.githubusercontent.com/iRon7/Join-Object/master/ConvertFrom-SourceTable.png .EXTERNALMODULEDEPENDENCIES .REQUIREDSCRIPTS .EXTERNALSCRIPTDEPENDENCIES .RELEASENOTES .PRIVATEDATA #> [CmdletBinding()]Param() Function ConvertFrom-SourceTable { <# .SYNOPSIS Converts a fixed column table to objects. .DESCRIPTION The ConvertFrom-SourceTable cmdlet creates objects from a fixed column source table (format-table) possibly surrounded by horizontal and/or vertical rulers. The ConvertFrom-SourceTable cmdlet supports most data types using the following formatting and alignment rules: Data that is left aligned will be parsed to the generic column type which is a string by default. Data that is right aligned will be evaluated. The default column type can be set by prefixing the column name with a standard (PowerShell) cast operator (a data type enclosed in square brackets, e.g.: "[Int]ID") Definitions: The width of a source table column is outlined by the header width, the ruler width and the width of the data. Column and Data alignment (none, left, right or justified) is defined by the existence of a character at the start or end of a column. Column alignment (which is used for a default field alignment) is defined by the first and last character or space of the header and the ruler of the outlined column. .PARAMETER InputObject Specifies the source table strings to be converted to objects. Enter a variable that contains the source table strings or type a command or expression that gets the source table strings. You can also pipe the source table strings to ConvertFrom-SourceTable. Note that streamed table rows are intermediately processed and released for the next cmdlet. In this mode, there is a higher possibility that floating tables or column data cannot be determined to be part of a specific column (as there is no overview of the table data that follows). To resolve this, use one of the folowing ruler or header specific parameters. .PARAMETER Header A string that defines the header line of an headless table or a multiple strings where each item represents the column name. In case the header contains a single string, it is used to define the (property) names, the size and alignment of the column, therefore it is key that the columns names are properly aligned with the rest of the column (including any table indents). If the header contains multiple strings, each string will be used to define the property names of each object. In this case, column alignment is based on the rest of the data and possible ruler. .PARAMETER Ruler A string that replaces any (horizontal) ruler in the input table which helps to define character columns in occasions where the table column margins are indefinable. .PARAMETER HorizontalDash (Alias -HDash) defines the horizontal ruler character. By default, each streamed table row (or a total raw table) will be searched for a ruler existing out of horizontal dash characters ("-"), spaces and possible vertical dashes. If the ruler is found, the prior line is presumed to be the header. If the ruler is not found within the first (two) streamed data lines, the first line is presumed the header line. If -HorizontalDash explicitly defined, all (streamed) lines will be searched for a matching ruler. If -HorizontalDash is set to `$Null`, the first data line is presumed the header line (unless the -VerticalDash parameter is set). .PARAMETER VerticalDash (Alias -VDash) defines the vertical ruler character. By default, each streamed table row (or a total raw table) will be searched for a header with vertical dash characters ("|"). If the header is not found within the first streamed data line, the first line is presumed the header line. If -VerticalDash explicitly defined, all (streamed) lines will be searched for a header with a vertical dash character. If -VerticalDash is set to `$Null`, the first data line is presumed the header line (unless the -HorizontalDash parameter is set). .PARAMETER Literal The -Literal parameter will prevent any right aligned data to be evaluated. .EXAMPLE $Colors = ConvertFrom-SourceTable ' Name Value RGB ---- ----- --- Black 0x000000 0,0,0 White 0xFFFFFF 255,255,255 Red 0xFF0000 255,0,0 Lime 0x00FF00 0,255,0 Blue 0x0000FF 0,0,255 Yellow 0xFFFF00 255,255,0 Cyan 0x00FFFF 0,255,255 Magenta 0xFF00FF 255,0,255 Silver 0xC0C0C0 192,192,192 Gray 0x808080 128,128,128 Maroon 0x800000 128,0,0 Olive 0x808000 128,128,0 Green 0x008000 0,128,0 Purple 0x800080 128,0,128 Teal 0x008080 0,128,128 Navy 0x000080 0,0,128 ' PS C:\> $Colors | Where {$_.Name -eq "Red"} Name Value RGB ---- ----- --- Red 16711680 {255, 0, 0} .EXAMPLE $Employees = ConvertFrom-SourceTable ' | Department | Name | Country | | ----------- | ------- | ------- | | Sales | Aerts | Belgium | | Engineering | Bauer | Germany | | Sales | Cook | England | | Engineering | Duval | France | | Marketing | Evans | England | | Engineering | Fischer | Germany | ' .EXAMPLE $ChangeLog = ConvertFrom-SourceTable ' [Version] [DateTime]Date Author Comments --------- -------------- ------ -------- 0.0.10 2018-05-03 Ronald Bode First design 0.0.20 2018-05-09 Ronald Bode Pester ready version 0.0.21 2018-05-09 Ronald Bode removed support for String[] types 0.0.22 2018-05-24 Ronald Bode Better "right aligned" definition 0.0.23 2018-05-25 Ronald Bode Resolved single column bug 0.0.24 2018-05-26 Ronald Bode Treating markdown table input as an option 0.0.25 2018-05-27 Ronald Bode Resolved error due to blank top lines ' .EXAMPLE $Files = ConvertFrom-SourceTable -Literal ' Mode LastWriteTime Length Name ---- ------------- ------ ---- d----l 11/16/2018 8:30 PM Archive -a---l 5/22/2018 12:05 PM (726) Build-Expression.ps1 -a---l 11/16/2018 7:38 PM 2143 CHANGELOG -a---l 11/17/2018 10:42 AM 14728 ConvertFrom-SourceTable.ps1 -a---l 11/17/2018 11:04 AM 23909 ConvertFrom-SourceTable.Tests.ps1 -a---l 8/4/2018 11:04 AM (6237) Import-SourceTable.ps1 ' .LINK Online Version: https://github.com/iRon7/ConvertFrom-SourceTable #> [CmdletBinding()][OutputType([Object[]])]Param ( [Parameter(ValueFromPipeLine = $True)][String[]]$InputObject, [String[]]$Header, [String]$Ruler, [Alias("HDash")][Char]$HorizontalDash = '-', [Alias("VDash")][Char]$VerticalDash = '|', [Switch]$Literal ) Begin { Enum Alignment {None; Left; Right; Justified} $Auto = !$PSBoundParameters.ContainsKey('HorizontalDash') -and !$PSBoundParameters.ContainsKey('VerticalDash') $HRx = If ($HorizontalDash) {'\x{0:X2}' -f [Int]$HorizontalDash} $VRx = If ($VerticalDash) {'\x{0:X2}' -f [Int]$VerticalDash} $RulerPattern = If ($VRx) {"^[$HRx$VRx\s]*$HRx[$HRx$VRx\s]*$"} ElseIf ($HRx) {"^[$HRx\s]*$HRx[$HRx\s]*$"} Else {'\A(?!x)x'} If (!$PSBoundParameters.ContainsKey('Ruler') -and $HRx) {Remove-Variable 'Ruler'; $Ruler = $Null} If (!$Ruler -and !$HRx -and !$VRx) {$Ruler = ''} $HeaderLine = If (@($Header).Count -gt 1) {''} ElseIf ($Header) {$Header} $TopLine = If ($HeaderLine) {''}; $LastLine, $OuterLeftColumn, $OuterRightColumn, $Mask = $Null; $RowIndex = 0; $Padding = 0; $Columns = @() $Property = New-Object System.Collections.Specialized.OrderedDictionary # Include support from PSv2 Function Null {$Null}; Function True {$True}; Function False {$False}; # Wrappers Function Debug-Column { If ($VRx) {Write-Debug $Mask} Else {Write-Debug (($Mask | ForEach-Object {If ($_) {"$_"} Else {' '}}) -Join '')} $ColumnInfo = For ($i = 0; $i -lt $Columns.Length; $i++) {' '} For ($i = 0; $i -lt $Columns.Length; $i++) {$Column = $Columns[$i] For ($c = $Column.Start + $Padding; $c -le $Column.End - $Padding; $c++) {$ColumnInfo[$c] = '-'} $ColumnInfo[($Column.Start + $Column.End) / 2] = "$i"[-1] If ($Column.Alignment -bAnd [Alignment]::Left) {$ColumnInfo[$Column.Start + $Padding] = '+'} If ($Column.Alignment -bAnd [Alignment]::Right) {$ColumnInfo[$Column.End - $Padding] = '+'} } Write-Debug ($ColumnInfo -Join '') } Function Mask([String[]]$Lines) { # Bit 2: Header and Ruler | Bit 1: Header and Ruler and Data | Bit 0: Header or Ruler or Data ForEach ($Line in $Lines) { $New = $Null -eq $Mask If ($New) {([Ref]$Mask).Value = New-Object Collections.Generic.List[Byte]} For ($i = 0; $i -lt ([Math]::Max($Mask.Count, $Line.Length)); $i++) { If ($i -ge $Mask.Count) {([Ref]$Mask).Value.Add(0)} If ($Line[$i] -Match '\S') { If ($New) {$Mask[$i] = 7} Else {$Mask[$i] = $Mask[$i] -bOr 1} } Else {$Mask[$i] = $Mask[$i] -bAnd 5} } } } Function Slice([String]$String, [Int]$Start, [Int]$End = [Int]::MaxValue) { If ($Start -lt 0) {$End += $Start; $Start = 0} If ($End -ge 0 -and $Start -lt $String.Length) { If ($End -lt $String.Length) {$String.Substring($Start, $End - $Start + 1)} Else {$String.Substring($Start)} } Else {$Null} } Function TypeName([String]$TypeName) { $Null = $TypeName.Trim() -Match '(\[(.*)\])?\s*(.*)' $Matches[2], (&{If($Matches[3]) {$Matches[3]} Else {$Matches[2]}}) } Function ErrorRecord($Line, $Start, $End, $Message) { $Exception = New-Object System.InvalidOperationException " $Message + $($Line -Replace '[\s]', ' ') + $(' ' * $Start)$('~' * ($End - $Start + 1)) " New-Object Management.Automation.ErrorRecord $Exception, $_.Exception.ErrorRecord.FullyQualifiedErrorId, $_.Exception.ErrorRecord.CategoryInfo.Category, $_.Exception.ErrorRecord.TargetObject } } Process { $Lines = $InputObject -Split '[\r\n]+' $NextIndex, $DataIndex = $Null If (!$Columns) { For ($Index = 0; $Index -lt $Lines.Length; $Index++) { $Line = $Lines[$Index] If ($Line.Trim()) { If ($Null -ne $HeaderLine) { If ($Null -ne $Ruler) { If ($Line -NotMatch $RulerPattern) {$DataIndex = $Index} } Else { If ($Line -Match $RulerPattern) {$Ruler = $Line} Else { $Ruler = '' $DataIndex = $Index } } } Else { If ($Null -ne $Ruler) { If ($LastLine -and (!$VRx -or $Ruler -NotMatch $VRx -or $LastLine -Match $VRx) -and $Line -NotMatch $RulerPattern) { $HeaderLine = $LastLine $DataIndex = $Index } } Else { If (!$RulerPattern) { $HeaderLine = $Line } ElseIf ($LastLine -and (!$VRx -or $Line -NotMatch $VRx -or $LastLine -Match $VRx) -and $Line -Match $RulerPattern) { $HeaderLine = $LastLine If (!$Ruler) {$Ruler = $Line} } } } If ($Line -NotMatch $RulerPattern) { If ($VRx -and $Line -Match $VRx -and $TopLine -NotMatch $VRx) {$TopLine = $Line; $NextIndex = $Null} ElseIf ($Null -eq $TopLine) {$TopLine = $Line} ElseIf ($Null -eq $NextIndex) {$NextIndex = $Index} $LastLine = $Line } If ($DataIndex) {Break} } } If (($Auto -or ($VRx -and $TopLine -Match $VRx)) -and $Null -ne $NextIndex) { If ($Null -eq $HeaderLine) { $HeaderLine = $TopLine If ($Null -eq $Ruler) {$Ruler = ''} $DataIndex = $NextIndex } ElseIf ($Null -eq $Ruler) { $Ruler = '' $DataIndex = $NextIndex } } If ($Null -ne $DataIndex) { $HeaderLine = $HeaderLine.TrimEnd() If ($TopLine -NotMatch $VRx) {$VRx = ''} If ($VRx) { $Index = 0; $Start = 0; $Length = $Null; $Padding = [Int]::MaxValue If ($Ruler) { $Start = $Ruler.Length - $Ruler.TrimStart().Length If ($Ruler.Length -gt $HeaderLine.Length) {$HeaderLine += ' ' * ($Ruler.Length - $HeaderLine.Length)} } $Mask = '?' * $Start ForEach ($Column in ($HeaderLine.SubString($Start) -Split $VRx)) { If ($Null -ne $Length) {$Mask += '?' * $Length + $VerticalDash} $Length = $Column.Length $Type, $Name = If (@($Header).Count -le 1) {TypeName $Column.Trim()} ElseIf ($Index -lt @($Header).Count) {TypeName $Header[$Index]} If ($Name) { $End = $Start + $Length - 1 $Padding = [Math]::Min($Padding, $Column.Length - $Column.TrimStart().Length) If ($Ruler -or $End -lt $HeaderLine.Length -1) {$Padding = [Math]::Min($Padding, $Column.Length - $Column.TrimEnd().Length)} $Columns += @{Index = $Index; Name = $Column; Type = $Null; Start = $Start; End = $End; Alignment = [Alignment]::Justified} $Property.Add($Name, $Null) } $Index++; $Start += $Column.Length + 1 } $Mask += '*' ForEach ($Column in $Columns) { If (!$Ruler) { If ($Column.Start -eq 0) { $Column.Start = [Math]::Max($HeaderLine.Length - $HeaderLine.TrimStart().Length - $Padding, 0) $OuterLeftColumn = $Column } ElseIf ($Column.End -eq $HeaderLine.Length -1) { $Column.End = $HeaderLine.TrimEnd().Length + $Padding $OuterRightColumn = $Column } } $Column.Type, $Column.Name = TypeName $Column.Name.Trim() If ($HeaderLine[$Column.Start + $Padding] -NotMatch '\S') {$Column.Alignment = $Column.Alignment -band -bnot [Alignment]::Left} If ($HeaderLine[$Column.End - $Padding] -NotMatch '\S') {$Column.Alignment = $Column.Alignment -band -bnot [Alignment]::Right} } } Else { Mask $HeaderLine, $Ruler $Lines | Select-Object -Skip $DataIndex | Where-Object {$_.Trim()} | Foreach-Object {Mask $_} $InWord = $False; $Index = 0; $Start = $Null For ($i = 0; $i -le $Mask.Count; $i++) { $Masked = $i -lt $Mask.Count -and $Mask[$i] If ($Masked -and !$InWord) {$InWord = $True; $Start = $i} ElseIf (!$Masked -and $InWord) {$InWord = $False $End = $i - 1 $Type, $Name = If (@($Header).Count -le 1) {TypeName "$(Slice -String $HeaderLine -Start $Start -End $End)".Trim()} ElseIf ($Index -lt @($Header).Count) {TypeName $Header[$Index]} If ($Name) { If ($Type) {$Type = Try {[Type]$Type} Catch { Write-Error -ErrorRecord (ErrorRecord -Line $HeaderLine -Start $Start -End $End -Message ( "Unknown type {0} in header at column '{1}'" -f $Type, $Name )) }} $Columns += @{Index = $Index++; Name = $Name; Type = $Type; Start = $Start; End = $End; Alignment = $Null} $Property.Add($Name, $Null) } } } } } } If ($Columns) { If ($VRx) { ForEach ($Line in ($Lines | Where-Object {$_ -like $Mask})) { If ($OuterLeftColumn) { $Start = [Math]::Max($Line.Length - $Line.TrimStart().Length - $Padding, 0) If ($Start -lt $OuterLeftColumn.Start) { $OuterLeftColumn.Start = $Start $OuterLeftColumn.Alignment = $Column.Alignment -band -bnot [Alignment]::Left } } ElseIf ($OuterRightColumn) { $End = $Line.TrimEnd().Length + $Padding If ($End -gt $OuterRightColumn.End) { $OuterRightColumn.End = $End $OuterRightColumn.Alignment = $Column.Alignment -band -bnot [Alignment]::Right } } } } Else { $Lines | Where-Object {$_.Trim()} | Foreach-Object {Mask $_} For ($c = 0; $c -lt $Columns.Length; $c++) {$Column = $Columns[$c] $NextRight = If ($c -lt $Columns.Length) {$Columns[$c + 1]} $Margin = If ($NextRight) {$NextRight.Start - 2} Else {$Mask.Count - 1} $Justify = If ($NextRight) {$NextRight.Alignment -eq [Alignment]::Left} Else {$True} If ($Column.Alignment -ne [Alignment]::Right) { For ($i = $Column.End + 1; $i -le $Margin; $i++) {If ($Mask[$i]) {$Column.End = $i} ElseIf (!$Justify) {Break}} } $NextLeft = If ($c -gt 0) {$Columns[$c - 1]} $Margin = If ($NextLeft) {$NextLeft.End + 2} Else {0} $Justify = If ($NextLeft) {$NextLeft.Alignment -eq [Alignment]::Right} Else {$True} If ($Column.Alignment -ne [Alignment]::Left) { For ($i = $Column.Start - 1; $i -ge $Margin; $i--) {If ($Mask[$i]) {$Column.Start = $i} ElseIf (!$Justify) {Break}} } If (!$Column.Alignment) { $IsLeftAligned = ($Mask[$Column.Start] -bAnd 4) -and !($Mask[$Column.end] -bAnd 2) $IsRightAligned = ($Mask[$Column.end] -bAnd 4) -and !($Mask[$Column.Start] -bAnd 2) If ($IsLeftAligned -ne $IsRightAligned) {$Column.Alignment = If ($IsLeftAligned) {[Alignment]::Left} Else {[Alignment]::Right}} If ($Column.Alignment) {If ($c -gt 0) {$c = $c - 2}} } } } If ($DebugPreference -ne 'SilentlyContinue' -and !$RowIndex) {Write-Debug ($HeaderLine -Replace '\s', ' '); Debug-Column} ForEach ($Line in ($Lines | Select-Object -Skip ([Int]$DataIndex))) { If ($Line.Trim() -and ($Line -ne $Ruler)) { $RowIndex++ If ($DebugPreference -ne 'SilentlyContinue') {Write-Debug ($Line -Replace '\s', ' ')} $Fields = If ($VRx -and $Line -notlike $Mask) {$Line -Split $VRx} ForEach($Column in $Columns) { $Property[$Column.Name] = If ($Fields) { $Fields[$Column.Index].Trim() } Else { $Field = Slice -String $Line -Start $Column.Start -End $Column.End If ($Field -is [String]) { $Tail = $Field.TrimStart() $Value = $Tail.TrimEnd() If (!$Literal -and $Value -gt '') { $IsLeftAligned = $Field.Length - $Tail.Length -eq $Padding $IsRightAligned = $Tail.Length - $Value.Length -eq $Padding $Alignment = If ($IsLeftAligned -ne $IsRightAligned) { If ($IsLeftAligned) {[Alignment]::Left} Else {[Alignment]::Right} } Else {$Column.Alignment} If ($Alignment -eq [Alignment]::Right) { Try {&([Scriptblock]::Create($Value))} Catch {$Value Write-Error -ErrorRecord (ErrorRecord -Line $Line -Start $Column.Start -End $Column.End -Message ( "The expression '{0}' in row {1} at column '{2}' can't be evaluted. Check the syntax or use the -Literal switch." -f $Value, $RowIndex, $Column.Name )) } } ElseIf ($Column.Type) { Try {&([Scriptblock]::Create("[$($Column.Type)]`$Value"))} Catch {$Value Write-Error -ErrorRecord (ErrorRecord -Line $Line -Start $Column.Start -End $Column.End -Message ( "The value '{0}' in row {1} at column '{2}' can't be converted to type {1}." -f $Valuee, $RowIndex, $Column.Name, $Column.Type )) } } Else {$Value} } Else {$Value} } Else {''} } } New-Object PSObject -Property $Property } } If ($DebugPreference -ne 'SilentlyContinue' -and $RowIndex) {Debug-Column} } } }; Set-Alias cfst ConvertFrom-SourceTable |