mirror of https://github.com/oxen-io/session-ios
WIP: global search UI
ryanzhao
3 years ago
parent
9ec749285f
commit
fed1218538
@ -0,0 +1,269 @@
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// Copyright © 2022 Rangeproof Pty Ltd. All rights reserved.
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import Foundation
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@objc
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public protocol GlobalSearchViewDelegate: AnyObject {
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func globalSearchViewWillBeginDragging()
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func globalSearchDidSelectSearchResult(thread: ThreadViewModel, messageId: String?)
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}
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@objc
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public class GlobalSearchViewController: UITableViewController {
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@objc
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public weak var delegate: GlobalSearchViewDelegate?
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@objc
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public var searchText = "" {
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didSet {
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AssertIsOnMainThread()
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// Use a slight delay to debounce updates.
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refreshSearchResults()
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}
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}
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var searchResultSet: HomeScreenSearchResultSet = HomeScreenSearchResultSet.empty
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private var lastSearchText: String?
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var searcher: FullTextSearcher {
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return FullTextSearcher.shared
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}
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enum SearchSection: Int {
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case noResults
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case contacts
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case messages
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}
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// MARK: Dependencies
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var dbReadConnection: YapDatabaseConnection {
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return OWSPrimaryStorage.shared().dbReadConnection
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}
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// MARK: View Lifecycle
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init() {
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super.init(style: .grouped)
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}
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required init?(coder: NSCoder) {
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fatalError("init(coder:) has not been implemented")
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}
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public override func viewDidLoad() {
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super.viewDidLoad()
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tableView.rowHeight = UITableView.automaticDimension
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tableView.estimatedRowHeight = 60
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tableView.separatorColor = .clear
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tableView.separatorInset = .zero
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tableView.separatorStyle = .none
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tableView.register(EmptySearchResultCell.self, forCellReuseIdentifier: EmptySearchResultCell.reuseIdentifier)
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tableView.register(ConversationCell.self, forCellReuseIdentifier: ConversationCell.reuseIdentifier)
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}
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private func reloadTableData() {
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tableView.reloadData()
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}
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// MARK: Update Search Results
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var refreshTimer: Timer?
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private func refreshSearchResults() {
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guard !searchResultSet.isEmpty else {
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// To avoid incorrectly showing the "no results" state,
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// always search immediately if the current result set is empty.
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refreshTimer?.invalidate()
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refreshTimer = nil
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updateSearchResults(searchText: searchText)
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return
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}
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if refreshTimer != nil {
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// Don't start a new refresh timer if there's already one active.
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return
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}
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refreshTimer?.invalidate()
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refreshTimer = WeakTimer.scheduledTimer(timeInterval: 0.1, target: self, userInfo: nil, repeats: false) { [weak self] _ in
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guard let strongSelf = self else {
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return
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}
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strongSelf.updateSearchResults(searchText: strongSelf.searchText)
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strongSelf.refreshTimer = nil
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}
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}
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private func updateSearchResults(searchText rawSearchText: String) {
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let searchText = rawSearchText.stripped
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guard searchText.count > 0 else {
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searchResultSet = HomeScreenSearchResultSet.empty
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lastSearchText = nil
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reloadTableData()
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return
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}
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guard lastSearchText != searchText else {
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// Ignoring redundant search.
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return
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}
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lastSearchText = searchText
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var searchResults: HomeScreenSearchResultSet?
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self.dbReadConnection.asyncRead({[weak self] transaction in
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guard let strongSelf = self else { return }
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searchResults = strongSelf.searcher.searchForHomeScreen(searchText: searchText, transaction: transaction)
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}, completionBlock: { [weak self] in
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AssertIsOnMainThread()
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guard let self = self else { return }
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guard let results = searchResults else {
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owsFailDebug("searchResults was unexpectedly nil")
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return
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}
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guard self.lastSearchText == searchText else {
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// Discard results from stale search.
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return
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}
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self.searchResultSet = results
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self.reloadTableData()
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})
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}
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}
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// MARK: - UITableView
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extension GlobalSearchViewController {
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// MARK: UITableViewDelegate
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public override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
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tableView.deselectRow(at: indexPath, animated: false)
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guard let searchSection = SearchSection(rawValue: indexPath.section) else { return }
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switch searchSection {
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case .noResults:
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SNLog("shouldn't be able to tap 'no results' section")
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case .contacts:
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let sectionResults = searchResultSet.conversations
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guard let searchResult = sectionResults[safe: indexPath.row] else { return }
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delegate?.globalSearchDidSelectSearchResult(thread: searchResult.thread, messageId: searchResult.messageId)
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case .messages:
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let sectionResults = searchResultSet.messages
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guard let searchResult = sectionResults[safe: indexPath.row] else { return }
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delegate?.globalSearchDidSelectSearchResult(thread: searchResult.thread, messageId: searchResult.messageId)
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}
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}
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// MARK: UITableViewDataSource
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public override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
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guard let searchSection = SearchSection(rawValue: section) else { return 0 }
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switch searchSection {
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case .noResults:
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return searchResultSet.isEmpty ? 1 : 0
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case .contacts:
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return searchResultSet.conversations.count
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case .messages:
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return searchResultSet.messages.count
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}
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}
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public override func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
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return UITableView.automaticDimension
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}
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public override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
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guard let searchSection = SearchSection(rawValue: indexPath.section) else {
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return UITableViewCell()
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}
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switch searchSection {
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case .noResults:
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guard let cell = tableView.dequeueReusableCell(withIdentifier: EmptySearchResultCell.reuseIdentifier) as? EmptySearchResultCell, indexPath.row == 0 else { return UITableViewCell() }
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cell.configure(searchText: searchText)
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return cell
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case .contacts, .messages:
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// TODO: return correct cell
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guard let cell = tableView.dequeueReusableCell(withIdentifier: EmptySearchResultCell.reuseIdentifier) as? EmptySearchResultCell else { return UITableViewCell() }
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cell.configure(searchText: searchText)
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return cell
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}
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}
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}
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// MARK: - UIScrollViewDelegate
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extension GlobalSearchViewController {
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public override func scrollViewWillBeginDragging(_ scrollView: UIScrollView) {
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delegate?.globalSearchViewWillBeginDragging()
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}
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}
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// MARK: -
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class EmptySearchResultCell: UITableViewCell {
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static let reuseIdentifier = "EmptySearchResultCell"
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let messageLabel: UILabel
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let activityIndicator = UIActivityIndicatorView(style: .whiteLarge)
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override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
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self.messageLabel = UILabel()
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super.init(style: style, reuseIdentifier: reuseIdentifier)
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messageLabel.textAlignment = .center
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messageLabel.numberOfLines = 3
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contentView.addSubview(messageLabel)
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messageLabel.autoSetDimension(.height, toSize: 150)
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messageLabel.autoPinEdge(toSuperviewMargin: .top, relation: .greaterThanOrEqual)
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messageLabel.autoPinEdge(toSuperviewMargin: .leading, relation: .greaterThanOrEqual)
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messageLabel.autoPinEdge(toSuperviewMargin: .bottom, relation: .greaterThanOrEqual)
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messageLabel.autoPinEdge(toSuperviewMargin: .trailing, relation: .greaterThanOrEqual)
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messageLabel.autoVCenterInSuperview()
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messageLabel.autoHCenterInSuperview()
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messageLabel.setContentHuggingHigh()
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messageLabel.setCompressionResistanceHigh()
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contentView.addSubview(activityIndicator)
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activityIndicator.autoCenterInSuperview()
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}
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required init?(coder aDecoder: NSCoder) {
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notImplemented()
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}
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public func configure(searchText: String) {
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if searchText.isEmpty {
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activityIndicator.color = Colors.text
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activityIndicator.isHidden = false
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activityIndicator.startAnimating()
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messageLabel.isHidden = true
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messageLabel.text = nil
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} else {
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activityIndicator.stopAnimating()
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activityIndicator.isHidden = true
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messageLabel.isHidden = false
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messageLabel.text = NSLocalizedString("CONVERSATION_SEARCH_NO_RESULTS", comment: "")
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messageLabel.textColor = Colors.text
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}
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}
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}
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@ -0,0 +1,26 @@
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import UIKit
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extension HomeVC: UISearchBarDelegate, GlobalSearchViewDelegate {
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func GlobalSearchViewWillBeginDragging() {
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}
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// MARK: UISearchBarDelegate
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func searchBarTextDidBeginEditing(_ searchBar: UISearchBar) {
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self.ensureSearchBarCancelButton()
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}
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func searchBarCancelButtonClicked(_ searchBar: UISearchBar) {
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searchBar.text = nil
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searchBar.resignFirstResponder()
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self.ensureSearchBarCancelButton()
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}
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func ensureSearchBarCancelButton() {
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let shouldShowCancelButton = searchBar.isFirstResponder
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guard searchBar.showsCancelButton != shouldShowCancelButton else { return }
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self.searchBar.setShowsCancelButton(shouldShowCancelButton, animated: true)
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}
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}
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