eqn.ios/Sources/Earthquake Network/Controllers/InApp/SubscriptionsHeaderTableViewCell.swift

//
//  SubscriptionsHeaderTableViewCell.swift
//  Earthquake Network
//
//  Created by Busi Andrea on 29/07/2020.
//  Copyright © 2020 Earthquake Network. All rights reserved.
//

import UIKit


class SubscriptionsHeaderTableViewCell: UITableViewHeaderFooterView {
    
    // MARK: - UI
    
    private lazy var headerTitleLabel: UILabel = {
        let label = UILabel()
        label.translatesAutoresizingMaskIntoConstraints = false
        label.font = UIFont.preferredFont(forTextStyle: .title2)
        label.textColor = AppTheme.Colors.darkGray
        label.textAlignment = .center
        return label
    }()
    
    private lazy var loadingActivityIndicator: UIActivityIndicatorView = {
        let spinner = UIActivityIndicatorView(style: .medium)
        spinner.translatesAutoresizingMaskIntoConstraints = false
        spinner.hidesWhenStopped = true
        return spinner
    }()

    // MARK: - Init
    
    override init(reuseIdentifier: String?) {
        super.init(reuseIdentifier: reuseIdentifier)
        setupUI()
    }
    
    required init?(coder: NSCoder) {
        super.init(coder: coder)
        setupUI()
    }
    
    // MARK: - Private
    
    private func setupUI() {
        contentView.addSubview(headerTitleLabel)
        contentView.addSubview(loadingActivityIndicator)
        
        headerTitleLabel.centerYAnchor.constraint(equalTo: contentView.centerYAnchor).isActive = true
        headerTitleLabel.leadingAnchor.constraint(equalTo: contentView.leadingAnchor, constant: .cardPadding).isActive = true
        headerTitleLabel.trailingAnchor.constraint(equalTo: contentView.trailingAnchor, constant: .cardPadding.negative).isActive = true
        loadingActivityIndicator.trailingAnchor.constraint(equalTo: contentView.trailingAnchor, constant: .cardPadding.negative).isActive = true
        loadingActivityIndicator.centerYAnchor.constraint(equalTo: headerTitleLabel.centerYAnchor).isActive = true
    }
    
    // MARK: - Public
    
    func update(isLoading: Bool, title: String?) {
        headerTitleLabel.text = title
        
        if isLoading && title != nil {
            loadingActivityIndicator.startAnimating()
        } else {
            loadingActivityIndicator.stopAnimating()
        }
    }
}