//
//  FileManager+Ext.swift
//  gen_html
//
//  Created by Isaac Paul on 4/30/25.
//

import Foundation

extension FileManager {
    //TODO: should also check if url is file
    func listFiles(_ directory:URL, withLowercaseExtensions:[String] = [], recursive:Bool = false) throws -> [URL] {
        let options:FileManager.DirectoryEnumerationOptions = recursive ? [] : [.skipsSubdirectoryDescendants]
        let fileIterator = try self.contentsOfDirectory(at: directory, includingPropertiesForKeys: [.isDirectoryKey], options: options)
        let filesOnly = fileIterator.filter { (url) -> Bool in
            do {
                let resourceValues = try url.resourceValues(forKeys: [.isDirectoryKey])
                let isDirectory = resourceValues.isDirectory ?? true
                if (isDirectory) {
                    return false
                }
            } catch { return false }
            
            if withLowercaseExtensions.count > 0 {
                let pathExt = url.pathExtension.lowercased()
                let contains = withLowercaseExtensions.firstIndex(of: pathExt)
                return contains != nil
            }
            return true
        }
        return filesOnly
    }
}