import Cocoa
import SwiftFSWatcher

class ViewController: NSViewController {

    // NOTE: - Any instance of `SwiftFSWatcher` must be class scoped, like below:

    /* This will not crash your app. */
    let fileWatcher = SwiftFSWatcher(["/var/www/html/", "/home/Downloads/"])
    let anotherWatcher = SwiftFSWatcher()

    override func viewDidLoad() {
        super.viewDidLoad()

        /* Using `localWatcher` will crash your app. */
        // let localWatcher = SwiftFSWatcher()

        fileWatcher.watch { changeEvents in
            for ev in changeEvents {
                print("eventPath: \(ev.eventPath), eventFlag: \(ev.eventFlag), eventId: \(ev.eventId)")

                // check if this event is of a file created
                if ev.eventFlag == (kFSEventStreamEventFlagItemIsFile + kFSEventStreamEventFlagItemCreated) {
                    print("created file at path: \(ev.eventPath)")
                }

            }
        }

        // setup and listen second watcher events on files only
        anotherWatcher.watchingPaths = ["/home/myFile.txt", "/root/bash_session.txt"]
        anotherWatcher.watch { changeEvents in
            for ev in changeEvents {
                print("eventPath: \(ev.eventPath), eventFlag: \(ev.eventFlag), eventId: \(ev.eventId)")

                if ev.eventFlag == (kFSEventStreamEventFlagItemIsFile + kFSEventStreamEventFlagItemInodeMetaMod + kFSEventStreamEventFlagItemModified) {
                    print("file modified at: \(ev.eventPath)")
                }
            }
        }
    }
}