440 lines
16 KiB
Swift
440 lines
16 KiB
Swift
import UIKit
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@MainActor
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final class IssuesViewController: RefreshingTableViewController, IssueSwipeActionHost {
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let context: AppContext
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let owner: String
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let repository: String
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private var rows: [IssueRow] = []
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private var filterOptions: IssueFilterOptions?
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private var filterTask: Task<Void, Never>?
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var issueMutationTask: Task<Void, Never>?
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private var currentPage: UInt32 = 0
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private lazy var filterButton = UIBarButtonItem(
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image: context.symbol("line.3.horizontal.decrease.circle")
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)
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init(context: AppContext, owner: String, repository: String) {
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self.context = context
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self.owner = owner
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self.repository = repository
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super.init()
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title = repository
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}
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@available(*, unavailable)
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required init?(coder: NSCoder) { fatalError("init(coder:) is not supported") }
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deinit {
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filterTask?.cancel()
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issueMutationTask?.cancel()
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}
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override func viewDidLoad() {
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super.viewDidLoad()
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tableView.register(IssueCell.self, forCellReuseIdentifier: "issue")
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let addButton = UIBarButtonItem(
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barButtonSystemItem: .add,
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target: self,
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action: #selector(createIssue)
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)
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addButton.accessibilityLabel = "New issue"
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navigationItem.rightBarButtonItems = [addButton, filterButton]
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updateFilterMenu()
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loadContent(refreshing: false)
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}
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override func loadContent(refreshing: Bool) {
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loadFilterOptions()
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loadIssues(refreshing: refreshing)
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}
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private func loadIssues(refreshing: Bool) {
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loadIssues(page: 1, refreshing: refreshing)
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}
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override func loadMoreContent() {
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loadIssues(page: currentPage + 1, refreshing: false)
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}
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private func loadIssues(page: UInt32, refreshing: Bool) {
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if page == 1 {
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resetPagination()
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beginLoading(refreshing: refreshing)
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}
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loadingTask?.cancel()
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loadingTask = Task {
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do {
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let result = try await context.core.issues(
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owner: owner,
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repository: repository,
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page: page
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)
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if page == 1 { rows = result.rows } else { rows.append(contentsOf: result.rows) }
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currentPage = page
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finishPagination(hasMore: result.hasMore)
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tableView.reloadData()
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updateEmptyState()
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} catch {
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if !Task.isCancelled {
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show(error: error)
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failPagination()
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}
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}
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if page == 1 { endLoading() }
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}
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}
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private func loadFilterOptions() {
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filterTask?.cancel()
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filterTask = Task {
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do {
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let options = try await context.core.issueFilters(
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owner: owner,
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repository: repository
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)
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guard !Task.isCancelled else { return }
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filterOptions = options
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updateFilterMenu()
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updateEmptyState()
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} catch {
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if !Task.isCancelled { show(error: error) }
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}
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}
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}
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override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
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rows.count
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}
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override func tableView(
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_ tableView: UITableView,
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cellForRowAt indexPath: IndexPath
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) -> UITableViewCell {
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let cell = tableView.dequeueReusableCell(withIdentifier: "issue", for: indexPath) as! IssueCell
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cell.configure(rows[indexPath.row])
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return cell
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}
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override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
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tableView.deselectRow(at: indexPath, animated: true)
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navigationController?.pushViewController(
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IssueViewController(
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context: context,
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owner: owner,
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repository: repository,
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number: rows[indexPath.row].number
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),
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animated: true
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)
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}
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override func tableView(
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_ tableView: UITableView,
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trailingSwipeActionsConfigurationForRowAt indexPath: IndexPath
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) -> UISwipeActionsConfiguration? {
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issueSwipeActions(for: rows[indexPath.row])
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}
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func reloadIssuesAfterMutation() {
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loadIssues(refreshing: false)
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}
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private func updateFilterMenu() {
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let current = context.core.settings().issueStatus
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let status = UIMenu(
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title: "Status",
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image: filterMenuImage("circle.lefthalf.filled", active: current != "open"),
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options: .singleSelection,
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children: ["open", "closed"].map { status in
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UIAction(
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title: status.capitalized,
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state: current == status ? .on : .off
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) { [weak self] _ in
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guard let self else { return }
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do {
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try self.context.core.setIssueStatus(status: status)
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self.updateFilterMenu()
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self.loadIssues(refreshing: false)
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} catch {
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self.show(error: error)
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}
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}
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}
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)
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var children: [UIMenuElement] = [status]
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if let filterOptions {
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children.insert(searchAction(filterOptions), at: 0)
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children.append(milestoneMenu(filterOptions))
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children.append(labelMenu(filterOptions))
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} else {
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children.append(UIAction(title: "Loading filters…", attributes: .disabled) { _ in })
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}
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children.append(clearFiltersMenu())
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filterButton.menu = UIMenu(children: children)
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filterButton.accessibilityLabel = "Filter issues"
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updateFilterTint()
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}
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private func searchAction(_ options: IssueFilterOptions) -> UIAction {
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UIAction(
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title: "Search Text",
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subtitle: options.searchText.isEmpty ? "Any text" : options.searchText,
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image: filterMenuImage("magnifyingglass", active: !options.searchText.isEmpty)
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) { [weak self] _ in
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self?.promptForSearchText(
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title: "Search Issues",
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current: options.searchText
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) { [weak self] searchText in
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self?.setSearchText(searchText)
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}
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}
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}
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private func milestoneMenu(_ options: IssueFilterOptions) -> UIMenu {
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let selected = options.selectedMilestone
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let all = UIAction(title: "All Milestones", state: selected.isEmpty ? .on : .off) {
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[weak self] _ in self?.selectMilestone("")
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}
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let actions = options.milestones.map { milestone in
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UIAction(
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title: milestone,
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state: selected == milestone ? .on : .off
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) { [weak self] _ in self?.selectMilestone(milestone) }
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}
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return UIMenu(
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title: "Milestone",
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image: filterMenuImage("flag", active: !selected.isEmpty),
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options: .singleSelection,
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children: [all] + actions
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)
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}
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private func labelMenu(_ options: IssueFilterOptions) -> UIMenu {
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let selected = Set(options.selectedLabels)
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let actions = options.labels.map { label in
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UIAction(
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title: options.unavailableLabels.contains(label) ? "\(label) (Unavailable)" : label,
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attributes: .keepsMenuPresented,
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state: selected.contains(label) ? .on : .off
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) { [weak self] action in
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guard let self, let options = self.filterOptions else { return }
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self.filterTask?.cancel()
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var labels = Set(options.selectedLabels)
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if labels.remove(label) == nil { labels.insert(label) }
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do {
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try self.saveFilters(
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milestone: options.selectedMilestone,
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labels: labels,
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searchText: options.searchText
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)
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self.filterOptions?.selectedLabels = Array(labels)
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action.state = labels.contains(label) ? .on : .off
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self.updateFilterMenu()
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self.loadIssues(refreshing: false)
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} catch {
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self.show(error: error)
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}
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}
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}
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return UIMenu(
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title: "Labels",
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image: filterMenuImage("tag", active: !selected.isEmpty),
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children: actions.isEmpty
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? [UIAction(title: "No labels", attributes: .disabled) { _ in }]
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: actions
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)
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}
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private func selectMilestone(_ milestone: String) {
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guard let options = filterOptions else { return }
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filterTask?.cancel()
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do {
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try saveFilters(
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milestone: milestone,
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labels: Set(options.selectedLabels),
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searchText: options.searchText
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)
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filterOptions?.selectedMilestone = milestone
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updateFilterMenu()
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loadIssues(refreshing: false)
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} catch {
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show(error: error)
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}
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}
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private func setSearchText(_ searchText: String) {
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guard let options = filterOptions else { return }
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filterTask?.cancel()
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do {
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try saveFilters(
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milestone: options.selectedMilestone,
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labels: Set(options.selectedLabels),
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searchText: searchText
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)
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filterOptions?.searchText = searchText.trimmingCharacters(in: .whitespacesAndNewlines)
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updateFilterMenu()
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loadIssues(refreshing: false)
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} catch {
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show(error: error)
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}
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}
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private func saveFilters(
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milestone: String,
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labels: Set<String>,
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searchText: String
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) throws {
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try context.core.setIssueFilters(
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owner: owner,
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repository: repository,
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milestone: milestone,
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labels: Array(labels),
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searchText: searchText
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)
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}
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private func clearFiltersMenu() -> UIMenu {
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UIMenu(
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options: .displayInline,
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children: [
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UIAction(
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title: "Clear Filters",
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image: context.symbol("xmark.circle"),
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attributes: filtersActive ? [] : .disabled
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) { [weak self] _ in self?.clearFilters() },
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]
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)
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}
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private func clearFilters() {
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filterTask?.cancel()
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do {
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try context.core.clearIssueFilters(owner: owner, repository: repository)
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filterOptions?.selectedMilestone = ""
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filterOptions?.selectedLabels = []
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filterOptions?.searchText = ""
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updateFilterMenu()
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loadIssues(refreshing: false)
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} catch {
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show(error: error)
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}
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}
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private var filtersActive: Bool {
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(try? context.core.issueFiltersActive(owner: owner, repository: repository)) ?? false
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}
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private func updateFilterTint() {
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filterButton.tintColor = filtersActive ? .tintColor : .secondaryLabel
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filterButton.accessibilityValue = filtersActive
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? "Filters active"
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: "Default filters"
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}
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@objc private func createIssue() {
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let editor = IssueEditorViewController(
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context: context,
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owner: owner,
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repository: repository
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) { [weak self] number in
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guard let self else { return }
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self.dismiss(animated: true) {
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self.loadContent(refreshing: false)
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self.navigationController?.pushViewController(
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IssueViewController(
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context: self.context,
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owner: self.owner,
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repository: self.repository,
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number: number
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),
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animated: true
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)
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}
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}
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present(UINavigationController(rootViewController: editor), animated: true)
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}
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private func updateEmptyState() {
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guard rows.isEmpty else {
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tableView.backgroundView = nil
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return
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}
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let status = context.core.settings().issueStatus
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tableView.backgroundView = EmptyBackgroundView(
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title: "No \(status) issues",
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detail: filtersActive
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? "No issues match the selected filters."
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: "This repository has no \(status) issues."
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)
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}
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}
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final class IssueCell: UITableViewCell {
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private let stateIcon = UIImageView()
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private let titleLabel = UILabel()
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private let summaryLabel = UILabel()
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private let labels = UIStackView()
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private let metaLabel = UILabel()
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private let milestoneLabel = UILabel()
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override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
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super.init(style: style, reuseIdentifier: reuseIdentifier)
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accessoryType = .disclosureIndicator
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titleLabel.font = .preferredFont(forTextStyle: .headline)
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titleLabel.numberOfLines = 2
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let titleStack = UIStackView(arrangedSubviews: [stateIcon, titleLabel])
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titleStack.alignment = .firstBaseline
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titleStack.spacing = 8
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summaryLabel.font = .preferredFont(forTextStyle: .subheadline)
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summaryLabel.textColor = .secondaryLabel
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summaryLabel.numberOfLines = 2
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labels.axis = .horizontal
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labels.spacing = 5
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metaLabel.font = .preferredFont(forTextStyle: .caption1)
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metaLabel.textColor = .tertiaryLabel
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metaLabel.numberOfLines = 2
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milestoneLabel.font = .preferredFont(forTextStyle: .caption1)
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milestoneLabel.adjustsFontForContentSizeCategory = true
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let stack = UIStackView(
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arrangedSubviews: [titleStack, summaryLabel, labels, metaLabel, milestoneLabel]
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)
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stack.axis = .vertical
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stack.spacing = 6
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stack.translatesAutoresizingMaskIntoConstraints = false
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contentView.addSubview(stack)
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NSLayoutConstraint.activate([
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stack.leadingAnchor.constraint(equalTo: contentView.leadingAnchor, constant: 16),
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stack.trailingAnchor.constraint(equalTo: contentView.trailingAnchor, constant: -8),
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stack.topAnchor.constraint(equalTo: contentView.topAnchor, constant: 10),
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stack.bottomAnchor.constraint(equalTo: contentView.bottomAnchor, constant: -10),
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])
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}
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@available(*, unavailable)
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required init?(coder: NSCoder) { fatalError("init(coder:) is not supported") }
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func configure(_ row: IssueRow) {
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configureIssueStateIcon(stateIcon, state: row.state, textStyle: .headline)
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titleLabel.text = row.title
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summaryLabel.text = row.summary
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metaLabel.text = row.meta
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milestoneLabel.isHidden = row.milestone.isEmpty
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milestoneLabel.attributedText = symbolText(
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"flag.fill",
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text: row.milestone,
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font: milestoneLabel.font,
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color: .tertiaryLabel
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)
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milestoneLabel.accessibilityLabel = row.milestone.isEmpty
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? nil
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: "Milestone \(row.milestone)"
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labels.arrangedSubviews.forEach { $0.removeFromSuperview() }
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labels.isHidden = row.labels.isEmpty
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for label in row.labels.prefix(3) {
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labels.addArrangedSubview(issueLabelView(label))
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}
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labels.addArrangedSubview(UIView())
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}
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}
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