session-ios/Session/Conversations/Views & Modals/ConversationTitleView.swift

// Copyright © 2022 Rangeproof Pty Ltd. All rights reserved.

import UIKit
import SessionUIKit
import SessionMessagingKit
import SessionUtilitiesKit

final class ConversationTitleView: UIView {
    override var intrinsicContentSize: CGSize {
        return UIView.layoutFittingExpandedSize
    }

    // MARK: - UI Components
    
    private lazy var titleLabel: UILabel = {
        let result: UILabel = UILabel()
        result.textColor = Colors.text
        result.font = .boldSystemFont(ofSize: Values.mediumFontSize)
        result.lineBreakMode = .byTruncatingTail
        
        return result
    }()

    private lazy var subtitleLabel: UILabel = {
        let result: UILabel = UILabel()
        result.textColor = Colors.text
        result.font = .systemFont(ofSize: 13)
        result.lineBreakMode = .byTruncatingTail
        
        return result
    }()

    // MARK: - Initialization
    
    init() {
        super.init(frame: .zero)
        
        let stackView: UIStackView = UIStackView(arrangedSubviews: [ titleLabel, subtitleLabel ])
        stackView.axis = .vertical
        stackView.alignment = .center
        stackView.isLayoutMarginsRelativeArrangement = true
        addSubview(stackView)
        
        stackView.pin(to: self)
    }
    
    required init?(coder: NSCoder) {
        preconditionFailure("Use init() instead.")
    }

    // MARK: - Content
    
    public func update(
        with name: String,
        notificationMode: SessionThread.NotificationMode,
        userCount: Int?
    ) {
        guard Thread.isMainThread else {
            DispatchQueue.main.async { [weak self] in
                self?.update(with: name, notificationMode: notificationMode, userCount: userCount)
            }
            return
        }
        
        // Generate the subtitle
        let subtitle: NSAttributedString? = {
            switch notificationMode {
                case .none:
                    return NSAttributedString(
                        string: "\u{e067}  ",
                        attributes: [
                            .font: UIFont.ows_elegantIconsFont(10),
                            .foregroundColor: Colors.text
                        ]
                    )
                    .appending(string: "Muted")
                    
                case .mentionsOnly:
                    // FIXME: This is going to have issues when swapping between light/dark mode
                    let imageAttachment = NSTextAttachment()
                    let color: UIColor = (isDarkMode ? .white : .black)
                    imageAttachment.image = UIImage(named: "NotifyMentions.png")?.asTintedImage(color: color)
                    imageAttachment.bounds = CGRect(
                        x: 0,
                        y: -2,
                        width: Values.smallFontSize,
                        height: Values.smallFontSize
                    )
                    
                    return NSAttributedString(attachment: imageAttachment)
                        .appending(string: "  ")
                        .appending(string: "view_conversation_title_notify_for_mentions_only".localized())
                    
                case .all:
                    guard let userCount: Int = userCount else { return nil }
                    
                    return NSAttributedString(string: "\(userCount) member\(userCount == 1 ? "" : "s")")
            }
        }()
        
        self.titleLabel.text = name
        self.titleLabel.font = .boldSystemFont(
            ofSize: (subtitle != nil ?
                Values.mediumFontSize :
                Values.veryLargeFontSize
            )
        )
        self.subtitleLabel.attributedText = subtitle
    }
}