ProductivityTools.PSConvertDocuments.psm1

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function ConvertFrom{
    param(
        [Parameter(Mandatory=$true)]
        [string]$Path,

        [Parameter(Mandatory=$true)]
        [string]$TargetFormat,
        
        [string]$OutputDirectory,
        [string]$OutputFileName,
        [string]$SourceFormat,
        
        [switch]$ExtractImages
    )
    

    Write-Verbose "Path to docx document: $Path"
    Write-Verbose "Chosen target format $TargetFormat"
    
    if($OutputDirectory -eq '')
    {
        $OutputDirectory ='.\';
        Write-Verbose "Output directory empty so changed to $OutputDirectory"
    }
    Write-Verbose "Output directory $OutputDirectory"
    New-Item -ItemType Directory -Force -Path $OutputDirectory
    
    $extension='.txt'
    if ($TargetFormat -eq 'html')
    {
        $extension='html'    
    }
    
    if ($TargetFormat -eq 'Markdown')
    {
        $extension='md'    
    }
    
    if($OutputFileName -eq '')
    {
        $OutputFileName ="Result.$extension";
        Write-Verbose "OutputFileName empty so changed to $OutputFilename"
    }
    
    Write-Verbose "Output OutputFileName: $OutputFileName"
    
    $OutputFullName=Join-Path $OutputDirectory $OutputFileName
    Write-Verbose "Output FullName: $OutputFullName"
    
    $OutputFilesPath=Join-Path $OutputDirectory "Files"

    $scriptPath= $PSScriptRoot
    $pandocPath="$scriptPath\Pandoc\pandoc.exe"

    Write-Verbose "Pandoc path: $pandocPath"
    if($ExtractImages)
    {
        $expression="'$pandocPath' '$Path' -f $SourceFormat -t $TargetFormat --output '$OutputFullName' --extract-media='$OutputFilesPath'"
    }
    else
    {

        [Array]$arguments = $Path, "-f" ,$SourceFormat, "-t", $TargetFormat, "--output", $OutputFullName;
    }
    Write-Verbose  "Executing command: $pandocPath"
    Write-Verbose  "With arguments: $arguments"

    & $pandocPath $arguments
    
}


function ConvertFrom-Markdown{
    [cmdletbinding()]
    param(
        [Parameter(Mandatory=$true)]
        [string]$Path,

        [Parameter(Mandatory=$true)]
        [ValidateSet("Html", "Docx")]
        [string]$TargetFormat,
        
        [string]$OutputDirectory,
        [string]$OutputFileName,
        
        [switch]$ExtractImages
    )
    
    Write-Verbose "Hello from ConvertFrom-Markdown"
    ConvertFrom $Path $TargetFormat $OutputDirectory $OutputFileName "Markdown" -ExtractImages:$ExtractImages
}

function ConvertFrom-Docx {
    [cmdletbinding()]
    param(
        [Parameter(Mandatory=$true)]
        [string]$Path,

        [Parameter(Mandatory=$true)]
        [ValidateSet("Html", "Markdown")]
        [string]$TargetFormat,
        
        [string]$OutputDirectory,
        [string]$OutputFileName,
        
        [switch]$ExtractImages
    )
    
    Write-Verbose "Hello from ConvertFrom-Docx"
    ConvertFrom $Path $TargetFormat $OutputDirectory $OutputFileName "Docx"  -ExtractImages:$ExtractImages
}

Export-ModuleMember ConvertFrom-Docx
Export-ModuleMember ConvertFrom-Markdown