TableRowAction.swift

//
// Copyright (c) 2015 Max Sokolov https://twitter.com/max_sokolov
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of
// this software and associated documentation files (the "Software"), to deal in
// the Software without restriction, including without limitation the rights to
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
// the Software, and to permit persons to whom the Software is furnished to do so,
// subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

import UIKit

open class TableRowActionOptions<CellType: ConfigurableCell> where CellType: UITableViewCell {

 public let item: CellType.CellData
 public let cell: CellType?
 public let indexPath: IndexPath
 public let userInfo: [AnyHashable: Any]?

 init(item: CellType.CellData, cell: CellType?, path: IndexPath, userInfo: [AnyHashable: Any]?) {

 self.item = item
 self.cell = cell
 self.indexPath = path
 self.userInfo = userInfo
 }
}

private enum TableRowActionHandler<CellType: ConfigurableCell> where CellType: UITableViewCell {

 case voidAction((TableRowActionOptions<CellType>) -> Void)
 case action((TableRowActionOptions<CellType>) -> Any?)

 func invoke(withOptions options: TableRowActionOptions<CellType>) -> Any? {
 
 switch self {
 case .voidAction(let handler):
 return handler(options)
 case .action(let handler):
 return handler(options)
 }
 }
}

open class TableRowAction<CellType: ConfigurableCell> where CellType: UITableViewCell {

 open var id: String?
 public let type: TableRowActionType
 private let handler: TableRowActionHandler<CellType>
 
 public init(_ type: TableRowActionType, handler: @escaping (_ options: TableRowActionOptions<CellType>) -> Void) {

 self.type = type
 self.handler = .voidAction(handler)
 }
 
 public init(_ key: String, handler: @escaping (_ options: TableRowActionOptions<CellType>) -> Void) {
 
 self.type = .custom(key)
 self.handler = .voidAction(handler)
 }
 
 public init<T>(_ type: TableRowActionType, handler: @escaping (_ options: TableRowActionOptions<CellType>) -> T) {

 self.type = type
 self.handler = .action(handler)
 }

 public func invokeActionOn(cell: UITableViewCell?, item: CellType.CellData, path: IndexPath, userInfo: [AnyHashable: Any]?) -> Any? {

 return handler.invoke(withOptions: TableRowActionOptions(item: item, cell: cell as? CellType, path: path, userInfo: userInfo))
 }
}