session-ios/Signal/src/Loki/ConversationCell.swift

145 lines
6.5 KiB
Swift
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2019-11-28 06:42:07 +01:00
final class ConversationCell : UITableViewCell {
public var threadViewModel: ThreadViewModel! { didSet { update() } }
public static let reuseIdentifier = "ConversationCell"
// MARK: Components
private lazy var unreadMessagesIndicator: UIView = {
let result = UIView()
result.backgroundColor = Colors.accent
return result
}()
private lazy var profilePictureView = ProfilePictureView()
private lazy var displayNameLabel: UILabel = {
let result = UILabel()
result.font = .boldSystemFont(ofSize: Values.mediumFontSize)
result.textColor = Colors.text
result.lineBreakMode = .byTruncatingTail
return result
}()
private lazy var snippetLabel: UILabel = {
let result = UILabel()
result.font = .systemFont(ofSize: Values.smallFontSize)
result.textColor = Colors.text
result.lineBreakMode = .byTruncatingTail
return result
}()
private lazy var typingIndicatorView = TypingIndicatorView()
// MARK: Initialization
override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
setUpViewHierarchy()
}
required init?(coder: NSCoder) {
super.init(coder: coder)
setUpViewHierarchy()
}
private func setUpViewHierarchy() {
// Make the cell transparent
backgroundColor = .clear
// Set up the unread messages indicator
unreadMessagesIndicator.set(.width, to: Values.accentLineThickness)
// Set up the profile picture view
let profilePictureViewSize = Values.mediumProfilePictureSize
profilePictureView.set(.width, to: profilePictureViewSize)
profilePictureView.set(.height, to: profilePictureViewSize)
profilePictureView.size = profilePictureViewSize
// Set up the label stack view
let snippetLabelContainer = UIView()
snippetLabelContainer.addSubview(snippetLabel)
snippetLabelContainer.addSubview(typingIndicatorView)
let labelStackView = UIStackView(arrangedSubviews: [ UIView.spacer(withHeight: Values.smallSpacing), displayNameLabel, snippetLabelContainer, UIView.spacer(withHeight: Values.smallSpacing) ])
labelStackView.axis = .vertical
labelStackView.spacing = Values.smallSpacing
// Set up the main stack view
let stackView = UIStackView(arrangedSubviews: [ unreadMessagesIndicator, profilePictureView, labelStackView ])
stackView.axis = .horizontal
stackView.alignment = .center
stackView.spacing = Values.mediumSpacing
contentView.addSubview(stackView)
// Set up the constraints
unreadMessagesIndicator.pin(.top, to: .top, of: stackView)
unreadMessagesIndicator.pin(.bottom, to: .bottom, of: stackView)
snippetLabel.pin(to: snippetLabelContainer)
typingIndicatorView.pin(.leading, to: .leading, of: snippetLabelContainer)
typingIndicatorView.centerYAnchor.constraint(equalTo: snippetLabel.centerYAnchor).isActive = true
stackView.pin(.leading, to: .leading, of: contentView)
stackView.pin(.top, to: .top, of: contentView)
contentView.pin(.trailing, to: .trailing, of: stackView, withInset: Values.mediumSpacing)
contentView.pin(.bottom, to: .bottom, of: stackView)
stackView.set(.width, to: UIScreen.main.bounds.width - 2 * Values.mediumSpacing) // Workaround for weird constraints issue
}
// MARK: Updating
private func update() {
LokiAPI.populateUserHexEncodedPublicKeyCacheIfNeeded(for: threadViewModel.threadRecord.uniqueId!) // FIXME: This is a terrible place to do this
unreadMessagesIndicator.isHidden = !threadViewModel.hasUnreadMessages
if threadViewModel.hasUnreadMessages {
backgroundColor = UIColor(hex: 0x1B1B1B)
} else {
backgroundColor = .clear
}
if threadViewModel.isGroupThread {
let users = LokiAPI.userHexEncodedPublicKeyCache[threadViewModel.threadRecord.uniqueId!] ?? []
let randomUsers = users.sorted().prefix(2) // Sort to provide a level of stability
if !randomUsers.isEmpty {
profilePictureView.hexEncodedPublicKey = randomUsers[0]
profilePictureView.additionalHexEncodedPublicKey = randomUsers.count == 2 ? randomUsers[1] : nil
} else {
// TODO: Handle
}
} else {
profilePictureView.hexEncodedPublicKey = threadViewModel.contactIdentifier!
profilePictureView.additionalHexEncodedPublicKey = nil
}
profilePictureView.update()
displayNameLabel.text = getDisplayName()
if SSKEnvironment.shared.typingIndicators.typingRecipientId(forThread: self.threadViewModel.threadRecord) != nil {
snippetLabel.text = ""
typingIndicatorView.isHidden = false
typingIndicatorView.startAnimation()
} else {
snippetLabel.attributedText = getSnippet()
typingIndicatorView.isHidden = true
typingIndicatorView.stopAnimation()
}
}
private func getDisplayName() -> String {
if threadViewModel.isGroupThread {
if threadViewModel.name.isEmpty {
return NSLocalizedString("New Group", comment: "")
} else {
return threadViewModel.name
}
} else {
if threadViewModel.threadRecord.isNoteToSelf() {
return NSLocalizedString("Note to Self", comment: "")
} else {
let hexEncodedPublicKey = threadViewModel.contactIdentifier!
return DisplayNameUtilities.getPrivateChatDisplayName(for: hexEncodedPublicKey) ?? hexEncodedPublicKey
}
}
}
private func getSnippet() -> NSMutableAttributedString {
let result = NSMutableAttributedString()
if threadViewModel.isMuted {
result.append(NSAttributedString(string: "\u{e067} ", attributes: [ .font : UIFont.ows_elegantIconsFont(10), .foregroundColor : Colors.unimportant ]))
}
if let rawSnippet = threadViewModel.lastMessageText {
let snippet = MentionUtilities.highlightMentions(in: rawSnippet, threadID: threadViewModel.threadRecord.uniqueId!)
result.append(NSAttributedString(string: snippet, attributes: [ .font : UIFont.systemFont(ofSize: Values.smallFontSize), .foregroundColor : Colors.text ]))
}
return result
}
}