Public/write-raw-pairs-in-colour.ps1
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function Write-RawPairsInColour { <# .NAME Write-RawPairsInColour .SYNOPSIS .DESCRIPTION The snippets passed in as element of $Pairs are in the same format as those passed into Write-InColour as TextSnippets. The only difference is that each snippet can only have 2 entries, the first being the key and the second being the value. .PARAMETER Pairs A 3 dimensioal array representing a sequence of key/value pairs where each key and value are in themselves a sub-sequence of 2 or 3 items representing text, foreground colour & background colours. Eg: $PairsToWriteInColour = @( @(@("Sport", "Red"), @("Tennis", "Blue", "Yellow")), @(@("Star", "Green"), @("Martina Hingis", "Cyan")) ); .PARAMETER Format A string containing a placeholder for the Key and the Value. It represents how the whole key/value pair should be represented. It must contain the KEY-PLACE-HOLDER and VALUE-PLACE-HOLDER strings .PARAMETER KeyPlaceHolder The place holder that identifies the Key in the FORMAT string .PARAMETER ValuePlaceHolder The place holder that identifies the Value in the FORMAT string. .PARAMETER KeyColours Array of 1 or 2 items only, the first is the foreground colour and the optional second value is the background colour, that specifies how Keys are displayed. .PARAMETER ValueColours The same as KEY-COLOURS but it applies to Values. .PARAMETER Open Specifies the leading wrapper around the whole key/value pair collection, typically '('. .PARAMETER Close Specifies the tail wrapper around the whole key/value pair collection typically ')'. .PARAMETER Separator Specifies a sequence of characters that separates the Key/Vale pairs, typically ','. .PARAMETER MetaColours This is the colour specifier for any character that is not the key or the value. Eg: if the format is defined as ['<%KEY%>'='<%VALUE%>'], then [' '=' '] will be written in this colour. As with other write in clour functionality, the user can specify just a single colour (in a single item array), which would represent the foreground colour, or 2 colours can be specified, representing the foreground and background colours in that order inside the 2 element array (a pair). These meta colours will also apply to the Open, Close and Separator tokens. .PARAMETER MessageColours An optional message that appears preceding the Key/Value pair collection and this array describes the colours used to write that message. .PARAMETER MessageSuffix Specifies a sequence of characters that separates the MESSAGE (if present) from the Key/Value pair collection. #> # This function is supposed to write to the host, because the output is in colour. # Using Write-Host is Krayola's raison d'etre! # [Diagnostics.CodeAnalysis.SuppressMessageAttribute("PSAvoidUsingWriteHost", "")] [CmdletBinding()] param ( [Parameter(Mandatory = $true)] [string[][][]] $Pairs, [Parameter(Mandatory = $false)] [string] $Format = "('<%KEY%>'='<%VALUE%>')", [Parameter(Mandatory = $false)] [string] $KeyPlaceHolder = "<%KEY%>", [Parameter(Mandatory = $false)] [string] $ValuePlaceHolder = "<%VALUE%>", [Parameter(Mandatory = $false)] $Open = "=== [", [Parameter(Mandatory = $false)] $Close = "] ===", [Parameter(Mandatory = $false)] $Separator = ", ", [Parameter(Mandatory = $false)] [string[]] $MetaColours = @("White"), [Parameter(Mandatory = $false)] [string] $Message, [Parameter(Mandatory = $false)] [string[]] $MessageColours = @("White"), [Parameter(Mandatory = $false)] [string] $MessageSuffix = " // ", [Switch]$NoNewLine ) if (($MetaColours.Length -lt 1) -or ($MetaColours.Length -gt 2)) { Write-Error -ErrorAction Stop ` -Message "Bad meta colours spec, aborting (No of colours specified: $($MetaColours.Length))"; } # Write the leading message # if (-not([String]::IsNullOrEmpty($Message))) { [string[]]$messageSnippet = @($Message) + $MessageColours; [string[][]]$wrapper = @(, $messageSnippet); Write-InColour -TextSnippets $wrapper -NoNewLine; if (-not([String]::IsNullOrEmpty($MessageSuffix))) { [string[]]$suffixSnippet = @($MessageSuffix) + $MessageColours; [string[][]]$wrapper = @(, $suffixSnippet); Write-InColour -TextSnippets $wrapper -NoNewLine; } } # Add the Open snippet # if (-not([String]::IsNullOrEmpty($Open))) { [string[]]$openSnippet = @($Open) + $MetaColours; [string[][]]$wrapper = @(, $openSnippet); Write-InColour -TextSnippets $wrapper -NoNewLine; } [int]$fieldCounter = 0; foreach ($field in $Pairs) { [string[][]]$displayField = @(); # Each element of a pair is an instance of a snippet that is compatible with Write-InColour # which we can defer to. We need to create the 5 snippets that represents the field pair. # if ($field.Length -ge 2) { # Get the key and value # [string[]]$keySnippet = $field[0]; $keyText, $keyColours = $keySnippet; [string[]]$valueSnippet = $field[1]; $valueText, $valueColours = $valueSnippet; [string[]]$constituents = Split-KeyValuePairFormatter -Format $Format ` -KeyConstituent $keyText -ValueConstituent $valueText ` -KeyPlaceHolder $KeyPlaceHolder -ValuePlaceHolder $ValuePlaceHolder; [string[]]$constituentSnippet = @(); # Now create the 5 snippets (header, key/value, mid, value/key, tail) # # header # $constituentSnippet = @($constituents[0]) + $MetaColours; $displayField += , $constituentSnippet; # key # $constituentSnippet = @($constituents[1]) + $keyColours; $displayField += , $constituentSnippet; # mid # $constituentSnippet = @($constituents[2]) + $MetaColours; $displayField += , $constituentSnippet; # value # $constituentSnippet = @($constituents[3]) + $valueColours; $displayField += , $constituentSnippet; # tail # $constituentSnippet = @($constituents[4]) + $MetaColours; $displayField += , $constituentSnippet; Write-InColour -TextSnippets $displayField -NoNewLine; if ($field.Length -gt 2) { Write-Warning " * Ignoring excess snippets *"; } } else { Write-Warning " * Insufficient snippet pair, 2 required, skipping *"; } # Field Separator snippet # if (($fieldCounter -lt ($Pairs.Length - 1)) -and (-not([String]::IsNullOrEmpty($Separator)))) { [string[]]$separatorSnippet = @($Separator) + $MetaColours; Write-InColour -TextSnippets @(, $separatorSnippet) -NoNewLine; } $fieldCounter++; } # Add the Close snippet # if (-not([String]::IsNullOrEmpty($Close))) { [string[]]$closeSnippet = @($Close) + $MetaColours; [string[][]]$wrapper = @(, $closeSnippet); Write-InColour -TextSnippets $wrapper -NoNewLine; } if (-not($NoNewLine.ToBool())) { Write-Host ""; } } Set-Alias -Name Write-RawPairsInColor -Value Write-RawPairsInColour |