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))
    }
}