EPUBParser Class

epub_parser.swift

import ZIPFoundation

class EPUBParser {
    static func parseFile(at sourceURL: URL) -> EPUBBook? {
        // Get the ePub's filename
        let filename = sourceURL.deletingPathExtension().lastPathComponent
        // The directory to save the unzipped files
        let destinationURL = URL(fileURLWithPath: NSTemporaryDirectory(), isDirectory: true).appendingPathComponent(filename)
        // Get the file manager
        let fileManager = FileManager()
        // Check if already unzipped
        if fileManager.fileExists(atPath: destinationURL.path) == false {
            do {
                // Make sure the directory exists. if not, create one
                try fileManager.createDirectory(at: destinationURL, withIntermediateDirectories: true, attributes: nil)
                // Unzip the ePub file
                try fileManager.unzipItem(at: zipFileURL, to: destinationURL)
            } catch {
                print("Extraction of the ePub file failed with error: \(error)")
                return nil
            }
        }
        // Parse the ePub file
        return EPUBBook(contentsOf: destinationURL)
    }
}