Firebase FIrestore addDocuments GeoPoint data in Fureka

FormViewController.swift

//
//  FormViewController.swift
//  Futsal-Kakekomi
//
//  Created by Hiro Fukami on 2019/05/01.
//  Copyright © 2019 Hiro Fukami. All rights reserved.
//

import UIKit
import Eureka
import Firebase
import MapKit

class MyFormViewController: FormViewController {

    @IBOutlet weak var cancelButton: UIBarButtonItem!
    @IBAction func actionCancelButton(_ sender: Any) {
        self.dismiss(animated: true, completion: nil)
    }

    var latitude: Double = 0.0
    var longitude: Double = 0.0

    var receivedCourtName = "" {
        didSet {
            self.form.rowBy(tag: "court")!.updateCell()
        }
    }

    var receivedCourtAddress = "" {
        didSet {
            CLGeocoder().geocodeAddressString(receivedCourtAddress) { placemarks, error in
                if let lat = placemarks?.first?.location?.coordinate.latitude {
                    self.latitude = lat
                }
                if let lng = placemarks?.first?.location?.coordinate.longitude {
                    self.longitude = lng
                }
            }
        }
    }

    override func viewDidLoad() {
        super.viewDidLoad()

        +++ Section("場所")
            <<< LabelRow("court") {
                $0.title = "コート名"
                $0.add(rule: RuleRequired())
                $0.validationOptions = .validatesOnChangeAfterBlurred
                $0.onCellSelection(self.courtTapped)
                }
                .cellUpdate { cell, row in
                    if self.receivedCourtName != "" {
                        row.value = self.receivedCourtName
                    }
                    if !row.isValid {
                        cell.textLabel?.textColor = .red
                    }
                }
        +++ Section("メモ")
            <<< TextAreaRow("memo") { row in
                row.placeholder = "レベルや金額など参加者に伝えたいことをお書きください。"
                row.add(rule: RuleRequired())
                row.validationOptions = .validatesOnChangeAfterBlurred
            }
            .cellUpdate { cell, row in
                if !row.isValid {
                    cell.textLabel?.textColor = .red
                }
            }

        +++ Section()
            <<< ButtonRow("register") {
                $0.title = "登録"
                $0.onCellSelection(self.buttonTapped)
            }
    }

    func courtTapped(cell: LabelCellOf<String>, row: LabelRow) {
        performSegue(withIdentifier: "locationSearch", sender: nil)
    }

    func buttonTapped(cell: ButtonCellOf<String>, row: ButtonRow) {

        let errors = form.validate()
        guard errors.isEmpty else {
            let alert = UIAlertController(title: "エラー", message: "入力していない項目があります。", preferredStyle: .alert)
            alert.addAction(UIAlertAction(title: "OK", style: .default, handler: nil))
            present(alert, animated: true, completion: nil)

            print("validate errors:", errors)
            return
        }

        let values = form.values()
        // Rowの値を取得する
        let memo = values["memo"] as! String
        // ログインユーザー情報
        let currentUser = Auth.auth().currentUser!

        let db = Firestore.firestore()
        var ref: DocumentReference? = nil
        ref = db.collection("events").addDocument(data: [
            "point": GeoPoint(latitude: self.latitude, longitude: self.longitude),
            "memo": memo,
            "createdAt": FieldValue.serverTimestamp(),
            "ownerName": currentUser.displayName!,
            "ownnerID": currentUser.uid
        ]) { err in
            if let err = err {
                let alert = UIAlertController(title: "エラー", message: "データが保存できませんでした。申し訳ございませんが、しばらくたってから入力してください。", preferredStyle: .alert)
                alert.addAction(UIAlertAction(title: "OK", style: .default, handler: nil))
                self.present(alert, animated: true, completion: nil)
                print("Error adding document: \(err)")
            } else {
                print("Document added with ID: \(ref!.documentID)")
                self.dismiss(animated: true, completion: nil)
            }
        }
    }
}