functions/Read-EBMarkdown.ps1
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function Read-EBMarkdown { <# .SYNOPSIS Reads a markdown file and converts it to a page to be built into an ebook .DESCRIPTION Reads a markdown file and converts it to a page to be built into an ebook .PARAMETER Path Path to the file to read. .PARAMETER InlineStyles Hashtable mapping inline decorators to span classes. Used to enable inline style customizations. For example, when providing a hashtable like this: @{ 1 = 'spellcast' } It will convert this line: "Let me show you my #1#Fireball#1#!" into "Let me show you my <span class="spellcast">Fireball</span>!" .EXAMPLE PS C:\> Get-ChildItem *.md | Read-EBMarkdown Reads and converts all markdown files in he current folder #> [OutputType([EbookBuilder.Page])] [CmdletBinding()] param ( [parameter(ValueFromPipeline = $true, ValueFromPipelineByPropertyName = $true)] [Alias('FullName')] [string[]] $Path, [hashtable] $InlineStyles = @{ } ) begin { function ConvertFrom-Markdown { [OutputType([EbookBuilder.Page])] [CmdletBinding()] param ( [string] $Path, [int] $Index, [hashtable] $InlineStyles = @{ } ) $lines = Get-Content -Path $Path -Encoding UTF8 | ConvertFrom-InlineStyle -InlineStyles $InlineStyles $stringBuilder = New-SBStringBuilder -Name ebook $PSDefaultParameterValues['Add-SBLine:Name'] = 'ebook' $inBlock = $false $inCode = $false $inBullet = $false $inNote = $false $inParagraph = $false $blockData = [pscustomobject]@{ Attributes = @{ } Type = $null Lines = @() File = $Path } $paragraph = @() $firstPar = $true foreach ($line in $lines) { #region Process Block Content if ($inBlock) { if ($line -like '## <*') { try { $firstPar = ConvertFrom-MdBlock -Type $blockData.Type -Lines $blockData.Lines -Attributes $blockData.Attributes -StringBuilder $stringBuilder } catch { Stop-PSFFunction -Message 'Failed to convert block' -ErrorRecord $_ -Target $blockData -EnableException $true -Cmdlet $PSCmdlet } $inBlock = $false } else { $blockData.Lines += $line } continue } #endregion Process Block Content #region Process Code Content if ($inCode) { if ($line -like '``````*') { $paragraph = @() Add-SBLine '</pre>' $inCode = $false $firstPar = $true continue } Add-SBLine $line continue } #endregion Process Code Content #region Process Bullet Point if ($inBullet) { if (-not $line.Trim()) { Add-SBLine '<li class="defaultLI">{0}</li>' -Values ($paragraph -join ' ') Add-SBLine '</ul>' $paragraph = @() $inBullet = $false $firstPar = $true continue } if ($line -notlike '+ *') { $paragraph += $line continue } if ($paragraph) { Add-SBLine '<li class="defaultLI">{0}</li>' -Values ($paragraph -join ' ') $paragraph = @() } $paragraph += $line -replace '^\+ ' continue } #endregion Process Bullet Point #region Process Notes if ($inNote) { if ($line.Trim()) { $paragraph += $line -replace '^>\s{0,1}' continue } foreach ($text in ConvertFrom-EBMarkdown -Line $paragraph -ClassFirstParagraph noteFirstPar -ClassParagraph noteText -EmphasisClass noteEmphasis) { Add-SBLine $text } Add-SBLine '<hr/></div>' $inNote = $false $firstPar = $true $paragraph = @() continue } #endregion Process Notes #region Process Paragraph if ($inParagraph) { if ($line.Trim()) { $paragraph += $line continue } $class = 'text' if ($firstPar) { $class = 'firstpar' $firstPar = $false } foreach ($text in ConvertFrom-EBMarkdown -Line $paragraph -ClassFirstParagraph $class -ClassParagraph $class) { Add-SBLine $text } $paragraph = @() $inParagraph = $false continue } #endregion Process Paragraph #region Region Starters # Handle begin of a Block if ($line -like '## <*') { $inBlock = $true $blockData = New-Block -Line $line -Path $Path continue } # Handle begin of a Code section if ($line -like '``````*') { $inCode = $true $firstPar = $true Add-SBLine '<pre>' continue } # Handle begin of a Bullet-Points section if ($line -like '+ *') { $inBullet = $true Add-SBLine '<ul>' $paragraph += $line -replace '^\+ ' continue } # Handle begin of a Notes section if ($line -like '> *') { $inNote = $true Add-SBLine '<div class="notes"><hr/>' $paragraph += $line -replace '^> ' continue } # Handle Chapter Title if ($line -like '# *') { $null = $stringBuilder.AppendLine("<h2>$($line -replace '^# ')</h2>") continue } # Handle begin of a Paragraph section if ($line.Trim()) { $inParagraph = $true $paragraph += $line } #endregion Region Starters } #region Cleanup #region Process Block Content if ($inBlock) { try { $firstPar = ConvertFrom-MdBlock -Type $blockData.Type -Lines $blockData.Lines -Attributes $blockData.Attributes -StringBuilder $stringBuilder } catch { Stop-PSFFunction -Message 'Failed to convert block' -ErrorRecord $_ -Target $blockData -EnableException $true -Cmdlet $PSCmdlet } $inBlock = $false } #endregion Process Block Content #region Process Code Content if ($inCode) { Add-SBLine '</pre>' $inCode = $false $firstPar = $true } #endregion Process Code Content #region Process Bullet Point if ($inBullet) { Add-SBLine '<li class="defaultLI">{0}</li>' -Values ($paragraph -join ' ') Add-SBLine '</ul>' $paragraph = @() $inBullet = $false $firstPar = $true } #endregion Process Bullet Point #region Process Notes if ($inNote) { foreach ($text in ConvertFrom-EBMarkdown -Line $paragraph -ClassFirstParagraph noteFirstPar -ClassParagraph noteText -EmphasisClass noteEmphasis) { Add-SBLine $text } Add-SBLine '<hr/></div>' $inNote = $false $firstPar = $true $paragraph = @() } #endregion Process Notes #region Process Paragraph if ($inParagraph) { $class = 'text' if ($firstPar) { $class = 'firstpar' $firstPar = $false } foreach ($text in ConvertFrom-EBMarkdown -Line $paragraph -ClassFirstParagraph $class -ClassParagraph $class) { Add-SBLine $text } $paragraph = @() $inParagraph = $false } #endregion Process Paragraph #endregion Cleanup New-Object EbookBuilder.Page -Property @{ Index = $Index Name = (Get-Item -Path $Path).BaseName Content = Close-SBStringBuilder -Name ebook SourceName = $Path TimeCreated = Get-Date MetaData = @{ } } } function ConvertFrom-InlineStyle { [OutputType([string])] [CmdletBinding()] param ( [Parameter(ValueFromPipeline = $true)] [string[]] $Line, [hashtable] $InlineStyles = @{ } ) begin { $replaceHash = @{ } foreach ($pair in $InlineStyles.GetEnumerator()) { if ($pair.Value -is [string]) { $replaceHash["#$($pair.Key)#(.+?)#$($pair.Key)#"] = '<span class="{0}">$1</span>' -f $pair.Value } else { $newValue = '<span class="{0}">' -f $pair.Value.Class if ($pair.Value.Prepend) { $newValue += $pair.Value.Prepend } $newValue += '$1' if ($pair.Value.Append) { $newValue += $pair.Value.Append } $newValue += '</span>' $replaceHash["#$($pair.Key)#(.+?)#$($pair.Key)#"] = $newValue } } } process { foreach ($string in $Line) { foreach ($pair in $replaceHash.GetEnumerator()) { $string = $string -replace $pair.Key, $pair.Value } $string } } } function New-Block { [Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSUseShouldProcessForStateChangingFunctions', '')] [CmdletBinding()] param ( [string] $Line, [string] $Path ) $type = $Line -replace '## <(\w+).+$', '$1' $attributes = @{ } $entries = $Line | Select-String '(\w+)="(.+?)"' -AllMatches foreach ($match in $entries.Matches) { $attributes[$match.Groups[1].Value] = $match.Groups[2].Value } [pscustomobject]@{ Attributes = $attributes Type = $type Lines = @() File = $Path } } $Index = 1 } process { foreach ($pathItem in $Path) { Write-PSFMessage -Message "Processing: $pathItem" ConvertFrom-Markdown -Path $pathItem -Index $Index -InlineStyles $InlineStyles $Index++ } } } |