Scans a directory of eBooks and creates a direcory and sub directories, with hard links to the actual eBooks.

Create Kavita Directory Structure

<#
Save to:  Create-Kavita-Structure.ps1
and run it with: .\Create-Kavita-Structure.ps1 -sourceDir 'DriveLetter:\PathToBooks' -kavitaDir 'DriveLetter:\PathToKavitaWatchedDir"
If sourceDir is not specified, assumes current directory (.)
If kavitaDir is not specified, assumes @Kavita under the current directory (.\@Kavita)

To test this without making any changes: Create-Kavita-Structure.ps1 -whatIf
#>
[CmdletBinding(SupportsShouldProcess = $true)]
Param(
    [Parameter(Mandatory = $false)][ValidateScript( { Test-Path (Resolve-Path $_) })][string] $sourceDir = (Resolve-Path .),
    [Parameter(Mandatory = $false)][ValidateScript( { Test-Path (Resolve-Path $_) })][string] $kavitaDir = (Resolve-Path '.\@Kavita')
)

# List of type level directories to exclude
$excludelist = '\@(Recycle|Kavita|Audiobookshelf|Plex)'

# Get top level directories
$directories = Get-ChildItem $sourceDir -Directory | Where-Object Name -NotMatch $excludelist

# Create the top level structure inside the Kavita directory
$directories | ForEach-Object {
    $subDir = Join-Path $kavitaDir $_.Name

    if ($PSCmdlet.ShouldProcess($subDir, 'Create')) {
        if (-not (Test-Path $subDir -ErrorAction SilentlyContinue)) {
            Write-Host "Creating Directory $subDir"
            New-Item -ItemType Directory $subDir | Out-Null
        }
    }}

# Create the sub directories and hard links to files
$directories | `
    ForEach-Object {
        $subDir = Join-Path $kavitaDir $_.Name
        $files = Get-ChildItem $($_.FullName) -Include *.pdf, *.epub, *.chm -File -Recurse

        $files | Select-Object -First 5 | ForEach-Object {
            $bookSubDirectory = Join-Path $subDir $_.BaseName
            $bookSymLink = Join-Path $bookSubDirectory $_.Name

            if ($PSCmdlet.ShouldProcess($bookSubDirectory, "Create Directory")) {
                # Create a sub directory for the file
                if (-not (Test-Path $bookSubDirectory -ErrorAction SilentlyContinue)) {
                    Write-Host "Creating Directory $bookSubDirectory"
                    New-Item -ItemType Directory $bookSubDirectory | Out-Null
                }
            }

            if ($PSCmdlet.ShouldProcess($bookSymLink, "Create Hard Link")) {
                if (-not (Test-Path $bookSymLink -ErrorAction SilentlyContinue)) {
                    Write-Host "Creating Hard Link $bookSymLink"
                    New-Item -ItemType HardLink -Path $bookSymLink -Value $_.FullName | Out-Null
                }
            }
        }
    }