deltachat-ios/deltachat-ios/NewGroupViewController.swift

//
//  NewGroupViewController.swift
//  deltachat-ios
//
//  Created by Alla Reinsch on 17.07.18.
//  Copyright © 2018 Jonas Reinsch. All rights reserved.
//

import UIKit

class NewGroupViewController: UITableViewController {
  let contactCellReuseIdentifier = "xyz"
  var contactIds: [Int] = Utils.getContactIds()
  var contactIdsForGroup: Set<Int> = [] {
    didSet {
      let c = contactIdsForGroup.count
      navigationItem.prompt = "\(c) members and me"
    }
  }

  @objc func didPressGroupCreationNextButton() {
    navigationController?.pushViewController(GroupNameController(contactIdsForGroup: contactIdsForGroup), animated: true)
  }

  override func viewDidLoad() {
    super.viewDidLoad()
    title = "New Group"
    navigationItem.prompt = "0 members and me"
    tableView.register(ContactCell.self, forCellReuseIdentifier: contactCellReuseIdentifier)
    navigationController?.navigationBar.prefersLargeTitles = false
    let groupCreationNextButton = UIBarButtonItem(title: "Next", style: .done, target: self, action: #selector(didPressGroupCreationNextButton))
    navigationItem.rightBarButtonItem = groupCreationNextButton
  }

  override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
  }

  override func numberOfSections(in _: UITableView) -> Int {
    return 1
  }

  override func tableView(_: UITableView, numberOfRowsInSection _: Int) -> Int {
    return contactIds.count
  }

  override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    guard let cell: ContactCell = tableView.dequeueReusableCell(withIdentifier: contactCellReuseIdentifier, for: indexPath) as? ContactCell else {
      fatalError("shouldn't happen")
    }

    let row = indexPath.row
    let contactRow = row

    let contact = MRContact(id: contactIds[contactRow])
    cell.nameLabel.text = contact.name
    cell.emailLabel.text = contact.email
    cell.initialsLabel.text = Utils.getInitials(inputName: contact.name)
    cell.setColor(contact.color)

    return cell
  }

  override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    let row = indexPath.row
    if let cell = tableView.cellForRow(at: indexPath) {
      tableView.deselectRow(at: indexPath, animated: true)
      let contactId = contactIds[row]
      if contactIdsForGroup.contains(contactId) {
        contactIdsForGroup.remove(contactId)
        cell.accessoryType = .none
      } else {
        contactIdsForGroup.insert(contactId)
        cell.accessoryType = .checkmark
      }
    }
  }
}