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Searchable Push Row for Eureka
import Eureka
open class _SearchablePushRow<T: Equatable, Cell: CellType> : TableSelectorRow<Cell, SearchableViewController<T>> where Cell: BaseCell, Cell: TypedCellType, Cell.Value == T, T: SearchableItem, T: CustomStringConvertible {
public required init(tag: String?) {
super.init(tag: tag)
onCreateControllerCallback = { [weak self] _ in
let controller = SearchableViewController<T>()
controller.searchPlaceholder = self?.searchPlaceholder
return controller
}
}
var searchPlaceholder: String?
}
/// Selector Controller (used to select one option among a list)
open class SearchableViewController<T:Equatable> : _SearchableViewController<T, ListCheckRow<T>, T> where T:SearchableItem, T: CustomStringConvertible {
}
open class _SearchableViewController<T: Equatable, Row: SelectableRowType, TOriginal:Equatable> : UITableViewController, UISearchResultsUpdating, TypedRowControllerType where Row: BaseRow, Row: TypedRowType, Row.Cell.Value == T, T: SearchableItem, T: CustomStringConvertible, TOriginal: SearchableItem, TOriginal: CustomStringConvertible {
/// A closure to be called when the controller disappears.
public var onDismissCallback: ((UIViewController) -> ())?
open var row: RowOf<Row.Cell.Value>!
let searchController = UISearchController(searchResultsController: nil)
required public init() {
super.init(style: .grouped)
self.navigationItem.titleView = self.searchController.searchBar
searchController.searchResultsUpdater = self
searchController.dimsBackgroundDuringPresentation = false
searchController.hidesNavigationBarDuringPresentation = false
self.definesPresentationContext = true
}
required public init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
var originalOptions = [T]()
var currentOptions = [T]()
var searchPlaceholder: String?
open override func viewDidLoad() {
super.viewDidLoad()
self.tableView.register(UITableViewCell.self, forCellReuseIdentifier: "Cell")
searchController.searchBar.placeholder = searchPlaceholder
//tableView!.tableHeaderView = searchController.searchBar
if let options = row.dataProvider?.arrayData {
self.originalOptions = options
self.currentOptions = options
}
self.tableView.reloadData()
}
fileprivate func filter(_ query: String) {
if query == "" {
currentOptions = self.originalOptions
} else {
currentOptions = self.originalOptions.filter{ $0.matchesSearchQuery(query) }
}
self.tableView.reloadData()
}
open override func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
open override func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
return self.row?.title
}
open override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return currentOptions.count
}
open override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let option = self.currentOptions[indexPath.row]
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath)
cell.textLabel?.text = option.description
return cell
}
open override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let option = self.currentOptions[indexPath.row]
row.value = option
onDismissCallback?(self)
}
open func updateSearchResults(for searchController: UISearchController) {
filter(searchController.searchBar.text!)
}
}
/// Generic row type where a user must select a value among several options.
open class TableSelectorRow<Cell: CellType, VCType: TypedRowControllerType>: OptionsRow<Cell> where Cell: BaseCell, VCType: UITableViewController, VCType.RowValue == Cell.Value {
open var onCreateControllerCallback : ((FormViewController)->(VCType))?
required public init(tag: String?) {
super.init(tag: tag)
}
/**
Extends `didSelect` method
*/
open override func customDidSelect() {
super.customDidSelect()
if isDisabled {
return
}
guard let createController = onCreateControllerCallback else {
return
}
let controller = createController(cell.formViewController()!)
prepareSelector(controller: controller)
let formViewController = cell.formViewController()!
formViewController.show(controller, sender: nil)
}
/**
Prepares the pushed row setting its title and completion callback.
*/
open override func prepare(for segue: UIStoryboardSegue) {
super.prepare(for: segue)
guard let controller = segue.destination as? VCType else { return }
prepareSelector(controller: controller)
}
fileprivate func prepareSelector(controller: VCType) {
controller.row = self
controller.title = selectorTitle ?? controller.title
controller.onDismissCallback = {vc in
_ = vc.navigationController?.popViewController(animated: true)
}
}
}
public final class SearchablePushRow<T: Equatable> : _SearchablePushRow<T, PushSelectorCell<T>>, RowType where T: SearchableItem, T: CustomStringConvertible {
public required init(tag: String?) {
super.init(tag: tag)
}
}
public protocol SearchableItem {
func matchesSearchQuery(_ query: String) -> Bool
}
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