FloatLabelRow.swift

//  FloatLabelRow.swift
//  Eureka ( https://github.com/xmartlabs/Eureka )
//
//  Copyright (c) 2016 Xmartlabs SRL ( http://xmartlabs.com )
//
//
// 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 Foundation
import UIKit
import MapKit
import Eureka

//MARK: FloatLabelCell
public class _FloatLabelCell<T>: Cell<T>, UITextFieldDelegate, TextFieldCell where T: Equatable, T: InputTypeInitiable {
    
    public var textField: UITextField! { return floatLabelTextField }
    
    required public init(style: UITableViewCellStyle, reuseIdentifier: String?) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)
    }
    
    required public init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    lazy public var floatLabelTextField: FloatLabelTextField = { [unowned self] in
        let floatTextField = FloatLabelTextField()
        floatTextField.translatesAutoresizingMaskIntoConstraints = false
        floatTextField.font = .preferredFont(forTextStyle: .body)
        floatTextField.titleFont = .boldSystemFont(ofSize: 11.0)
        floatTextField.clearButtonMode = .whileEditing
        return floatTextField
        }()
    
    
    open override func setup() {
        super.setup()
        height = { 55 }
        selectionStyle = .none
        contentView.addSubview(floatLabelTextField)
        floatLabelTextField.delegate = self
        floatLabelTextField.addTarget(self, action: #selector(_FloatLabelCell.textFieldDidChange(_:)), for: .editingChanged)
        contentView.addConstraints(layoutConstraints())
    }
    
    open override func update() {
        super.update()
        
        textLabel?.text = nil
        detailTextLabel?.text = nil
        floatLabelTextField.attributedPlaceholder = NSAttributedString(string: row.title ?? "", attributes: [NSForegroundColorAttributeName: UIColor.lightGray])
        floatLabelTextField.text =  row.displayValueFor?(row.value)
        floatLabelTextField.isEnabled = !row.isDisabled
        floatLabelTextField.titleTextColour = .lightGray
        floatLabelTextField.alpha = row.isDisabled ? 0.6 : 1
    }
    
    open override func cellCanBecomeFirstResponder() -> Bool {
        return !row.isDisabled && floatLabelTextField.canBecomeFirstResponder
    }
    
    open override func cellBecomeFirstResponder(withDirection direction: Direction) -> Bool {
        return floatLabelTextField.becomeFirstResponder()
    }
    
    open override func cellResignFirstResponder() -> Bool {
        return floatLabelTextField.resignFirstResponder()
    }
    
    private func layoutConstraints() -> [NSLayoutConstraint] {
        let views = ["floatLabeledTextField": floatLabelTextField]
        let metrics = ["vMargin":8.0]
        return NSLayoutConstraint.constraints(withVisualFormat: "H:|-[floatLabeledTextField]-|", options: .alignAllLastBaseline, metrics: metrics, views: views) + NSLayoutConstraint.constraints(withVisualFormat: "V:|-(vMargin)-[floatLabeledTextField]-(vMargin)-|", options: .alignAllLastBaseline, metrics: metrics, views: views)
    }

    open func textFieldDidChange(_ textField: UITextField) {
        guard let textValue = textField.text else {
            row.value = nil
            return
        }
        guard let fieldRow = row as? FormatterConformance, let formatter = fieldRow.formatter else {
            row.value = textValue.isEmpty ? nil : (T.init(string: textValue) ?? row.value)
            return
        }
        if fieldRow.useFormatterDuringInput {
            let value: AutoreleasingUnsafeMutablePointer<AnyObject?> = AutoreleasingUnsafeMutablePointer<AnyObject?>.init(UnsafeMutablePointer<T>.allocate(capacity: 1))
            let errorDesc: AutoreleasingUnsafeMutablePointer<NSString?>? = nil
            if formatter.getObjectValue(value, for: textValue, errorDescription: errorDesc) {
                row.value = value.pointee as? T
                guard var selStartPos = textField.selectedTextRange?.start else { return }
                let oldVal = textField.text
                textField.text = row.displayValueFor?(row.value)
                selStartPos = (formatter as? FormatterProtocol)?.getNewPosition(forPosition: selStartPos, inTextInput: textField, oldValue: oldVal, newValue: textField.text) ?? selStartPos
                textField.selectedTextRange = textField.textRange(from: selStartPos, to: selStartPos)
                return
            }
        } else {
            let value: AutoreleasingUnsafeMutablePointer<AnyObject?> = AutoreleasingUnsafeMutablePointer<AnyObject?>.init(UnsafeMutablePointer<T>.allocate(capacity: 1))
            let errorDesc: AutoreleasingUnsafeMutablePointer<NSString?>? = nil
            if formatter.getObjectValue(value, for: textValue, errorDescription: errorDesc) {
                row.value = value.pointee as? T
            } else {
                row.value = textValue.isEmpty ? nil : (T.init(string: textValue) ?? row.value)
            }
        }
    }
    
    
    //Mark: Helpers
    private func displayValue(useFormatter: Bool) -> String? {
        guard let v = row.value else { return nil }
        if let formatter = (row as? FormatterConformance)?.formatter, useFormatter {
            return textField?.isFirstResponder == true ? formatter.editingString(for: v) : formatter.string(for: v)
        }
        return String(describing: v)
    }
    
    //MARK: TextFieldDelegate
    public func textFieldDidBeginEditing(_ textField: UITextField) {
        formViewController()?.beginEditing(of: self)
        if let fieldRowConformance = row as? FormatterConformance, let _ = fieldRowConformance.formatter, fieldRowConformance.useFormatterOnDidBeginEditing ?? fieldRowConformance.useFormatterDuringInput {
            textField.text = displayValue(useFormatter: true)
        } else {
            textField.text = displayValue(useFormatter: false)
        }
    }
    
    public func textFieldDidEndEditing(_ textField: UITextField) {
        formViewController()?.endEditing(of: self)
        formViewController()?.textInputDidEndEditing(textField, cell: self)
        textFieldDidChange(textField)
        textField.text = displayValue(useFormatter: (row as? FormatterConformance)?.formatter != nil)
    }
    
    public func textFieldShouldReturn(_ textField: UITextField) -> Bool {
        return formViewController()?.textInputShouldReturn(textField, cell: self) ?? true
    }
    
    public func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
        return formViewController()?.textInput(textField, shouldChangeCharactersInRange:range, replacementString:string, cell: self) ?? true
    }
    
    public func textFieldShouldBeginEditing(_ textField: UITextField) -> Bool {
        return formViewController()?.textInputShouldBeginEditing(textField, cell: self) ?? true
    }
    
    public func textFieldShouldClear(_ textField: UITextField) -> Bool {
        return formViewController()?.textInputShouldClear(textField, cell: self) ?? true
    }
    
    public func textFieldShouldEndEditing(_ textField: UITextField) -> Bool {
        return formViewController()?.textInputShouldEndEditing(textField, cell: self) ?? true
    }
    
}


public class TextFloatLabelCell : _FloatLabelCell<String>, CellType {
    
    required public init(style: UITableViewCellStyle, reuseIdentifier: String?) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)
    }
    
    required public init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    public override func setup() {
        super.setup()
        textField?.autocorrectionType = .default
        textField?.autocapitalizationType = .sentences
        textField?.keyboardType = .default
    }
    
}

public class IntFloatLabelCell : _FloatLabelCell<Int>, CellType {
    
    required public init(style: UITableViewCellStyle, reuseIdentifier: String?) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)
    }
    
    required public init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    public override func setup() {
        super.setup()
        textField?.autocorrectionType = .default
        textField?.autocapitalizationType = .none
        textField?.keyboardType = .numberPad
    }
    
}

public class DecimalFloatLabelCell : _FloatLabelCell<Double>, CellType {
    
    required public init(style: UITableViewCellStyle, reuseIdentifier: String?) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)
    }
    
    required public init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    public override func setup() {
        super.setup()
        textField?.keyboardType = .decimalPad
        textField.autocorrectionType = .no
    }
    
}


public class URLFloatLabelCell : _FloatLabelCell<URL>, CellType {
    
    required public init(style: UITableViewCellStyle, reuseIdentifier: String?) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)
    }
    
    required public init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    public override func setup() {
        super.setup()
        textField?.keyboardType = .URL
    }
    
}

public class TwitterFloatLabelCell : _FloatLabelCell<String>, CellType {
    
    required public init(style: UITableViewCellStyle, reuseIdentifier: String?) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)
    }
    
    required public init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    public override func setup() {
        super.setup()
        textField?.autocorrectionType = .no
        textField?.autocapitalizationType = .none
        textField?.keyboardType = .twitter
    }
    
}

public class AccountFloatLabelCell : _FloatLabelCell<String>, CellType {
    
    required public init(style: UITableViewCellStyle, reuseIdentifier: String?) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)
    }
    
    required public init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    public override func setup() {
        super.setup()
        textField?.autocorrectionType = .no
        textField?.autocapitalizationType = .none
        textField?.keyboardType = .asciiCapable
    }
    
}

public class PasswordFloatLabelCell : _FloatLabelCell<String>, CellType {
    
    required public init(style: UITableViewCellStyle, reuseIdentifier: String?) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)
    }
    
    required public init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    public override func setup() {
        super.setup()
        textField?.autocorrectionType = .no
        textField?.autocapitalizationType = .none
        textField?.keyboardType = .asciiCapable
        textField?.isSecureTextEntry = true
    }
    
}

public class NameFloatLabelCell : _FloatLabelCell<String>, CellType {
    
    required public init(style: UITableViewCellStyle, reuseIdentifier: String?) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)
    }
    
    required public init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    public override func setup() {
        super.setup()
        textField.autocorrectionType = .no
        textField.autocapitalizationType = .words
        textField.keyboardType = .asciiCapable
    }
    
}

public class EmailFloatLabelCell : _FloatLabelCell<String>, CellType {
    
    required public init(style: UITableViewCellStyle, reuseIdentifier: String?) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)
    }
    
    required public init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    public override func setup() {
        super.setup()
        textField?.autocorrectionType = .no
        textField?.autocapitalizationType = .none
        textField?.keyboardType = .emailAddress
    }
    
}

public class PhoneFloatLabelCell : _FloatLabelCell<String>, CellType {
    
    required public init(style: UITableViewCellStyle, reuseIdentifier: String?) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)
    }
    
    required public init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    public override func setup() {
        super.setup()
        textField?.keyboardType = .phonePad
    }
    
}

public class ZipCodeFloatLabelCell: _FloatLabelCell<String>, CellType {
    
    required public init(style: UITableViewCellStyle, reuseIdentifier: String?) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)
    }
    
    required public init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    open override func update() {
        super.update()
        textField.autocorrectionType = .no
        textField.autocapitalizationType = .allCharacters
        textField.keyboardType = .numbersAndPunctuation
    }
    
}

// MARK: Rows with formatter
open class _IntFloatRow: FloatLabelRow<IntFloatLabelCell> {
    
    public required init(tag: String?) {
        super.init(tag: tag)
        let numberFormatter = NumberFormatter()
        numberFormatter.locale = Locale.current
        numberFormatter.numberStyle = .decimal
        numberFormatter.minimumFractionDigits = 0
        formatter = numberFormatter
    }
    
}

open class _DecimalFloatRow: FloatLabelRow<DecimalFloatLabelCell> {
    
    public required init(tag: String?) {
        super.init(tag: tag)
        let numberFormatter = NumberFormatter()
        numberFormatter.locale = Locale.current
        numberFormatter.numberStyle = .decimal
        numberFormatter.minimumFractionDigits = 2
        formatter = numberFormatter
    }
    
}

//MARK: FloatLabelRow
open class FloatLabelRow<Cell: CellType>: FormatteableRow<Cell> where Cell: BaseCell, Cell: TextFieldCell {
    
    public required init(tag: String?) {
        super.init(tag: tag)
    }
    
}

public final class TextFloatLabelRow: FloatLabelRow<TextFloatLabelCell>, RowType {
    
    public required init(tag: String?) {
        super.init(tag: tag)
    }
    
}

public final class IntFloatLabelRow: _IntFloatRow, RowType {
    
    public required init(tag: String?) {
        super.init(tag: tag)
    }
    
}

public final class DecimalFloatLabelRow: _DecimalFloatRow, RowType {
    
    public required init(tag: String?) {
        super.init(tag: tag)
    }
    
}

public final class URLFloatLabelRow: FloatLabelRow<URLFloatLabelCell>, RowType {
    
    public required init(tag: String?) {
        super.init(tag: tag)
    }
    
}

public final class TwitterFloatLabelRow: FloatLabelRow<TwitterFloatLabelCell>, RowType {
    
    public required init(tag: String?) {
        super.init(tag: tag)
    }
    
}

public final class AccountFloatLabelRow: FloatLabelRow<AccountFloatLabelCell>, RowType {
    
    public required init(tag: String?) {
        super.init(tag: tag)
    }
    
}

public final class PasswordFloatLabelRow: FloatLabelRow<PasswordFloatLabelCell>, RowType {
    
    public required init(tag: String?) {
        super.init(tag: tag)
    }
    
}

public final class NameFloatLabelRow: FloatLabelRow<NameFloatLabelCell>, RowType {
    
    public required init(tag: String?) {
        super.init(tag: tag)
    }
    
}

public final class EmailFloatLabelRow: FloatLabelRow<EmailFloatLabelCell>, RowType {
    
    public required init(tag: String?) {
        super.init(tag: tag)
    }
    
}

public final class PhoneFloatLabelRow: FloatLabelRow<PhoneFloatLabelCell>, RowType {
    
    public required init(tag: String?) {
        super.init(tag: tag)
    }
    
}

public final class ZipCodeFloatLabelRow: FloatLabelRow<ZipCodeFloatLabelCell>, RowType {
    
    required public init(tag: String?) {
        super.init(tag: tag)
    }
    
}