A script to convert EPUB files to CBZ (for the specific case of an EPUB with image files following a specific pattern)

epub2cbz.ps1

# A script to convert EPUB files to CBZ 
# (for the specific case of an EPUB with image files following a specific pattern) 
# (written with some help from ChatGPT)

# Check if the EPUB file path is provided as a command-line argument
if ($args.Count -eq 0) {
    Write-Host "Usage: .\epub2cbz.ps1 <path-to-epub-file>" -ForegroundColor Yellow
    return
}

# Get the EPUB file path from the command-line argument
$epubFilePath = $args[0]

# Check if the file exists
if (-Not (Test-Path $epubFilePath)) {
    Write-Host "The specified EPUB file does not exist." -ForegroundColor Red
    return
}

# Define temporary folder and output file paths
$tempFolder = "${env:TEMP}\EPUB_Extraction"
$outputCBZ = (Join-Path (Split-Path $epubFilePath -Parent) (([IO.Path]::GetFileNameWithoutExtension($epubFilePath)) + "-new.cbz"))

# Ensure the temp folder is empty
if (Test-Path $tempFolder) {
    Remove-Item -Recurse -Force $tempFolder
}
New-Item -ItemType Directory -Path $tempFolder | Out-Null

# Step 1: Extract the EPUB file to the temp folder
# [System.IO.Compression.ZipFile]::ExtractToDirectory($epubFilePath, $tempFolder)
Expand-Archive -Path $epubFilePath -DestinationPath $tempFolder

# Check if extraction was successful
if (-Not (Test-Path (Join-Path $tempFolder "OEBPS\images"))) {
    Write-Host "Extraction failed or the OEBPS\images folder is missing." -ForegroundColor Red
    return
}

# Step 2: Create the CBZ file from the images
$imageFolder = Join-Path $tempFolder "OEBPS\images"
$imageFiles = @()
$imageFiles += Get-ChildItem -Path $imageFolder -Filter "cover.jpeg" -Recurse | Sort-Object Name
$imageFiles += Get-ChildItem -Path $imageFolder -Filter "img*.jpeg" -Recurse | Sort-Object Name

if ($imageFiles.Count -eq 0) {
    Write-Host "No cover.jpeg or img*.jpeg files found in the images folder." -ForegroundColor Yellow
    return
}

# Compress the selected files into a CBZ
Compress-Archive @($imageFiles.FullName) -DestinationPath $outputCBZ -Force

if (-Not (Test-Path $outputCBZ)) {
    Write-Host "Failed to create the CBZ file." -ForegroundColor Red
    return
}

# Step 3: Clean up the temp folder
Remove-Item -Recurse -Force $tempFolder

# Notify the user of success
Write-Host "CBZ file created successfully: $outputCBZ" -ForegroundColor Green