Files
GitHawk/Classes/Issues/IssuesViewController.swift
2017-10-27 10:55:22 -04:00

596 lines
20 KiB
Swift

//
// IssuesViewController.swift
// Freetime
//
// Created by Ryan Nystrom on 5/17/17.
// Copyright © 2017 Ryan Nystrom. All rights reserved.
//
import UIKit
import IGListKit
import TUSafariActivity
import SafariServices
import SlackTextViewController
import SnapKit
final class IssuesViewController: SLKTextViewController,
ListAdapterDataSource,
FeedDelegate,
AddCommentListener,
IssueCommentAutocompleteDelegate,
FeedSelectionProviding,
IssueNeckLoadSectionControllerDelegate,
IssueCommentSectionControllerDelegate {
private let client: GithubClient
private let model: IssueDetailsModel
private let addCommentClient: AddCommentClient
private let autocomplete = IssueCommentAutocomplete(autocompletes: [EmojiAutocomplete()])
private var hasScrolledToBottom = false
private let viewFilesModel = "view_files" as ListDiffable
private let textActionsController = TextActionsController()
lazy private var feed: Feed = { Feed(
viewController: self,
delegate: self,
collectionView: self.collectionView,
managesLayout: false
) }()
private var current: IssueResult? = nil {
didSet {
let hidden: Bool
if let current = self.current {
hidden = current.status.locked && !current.viewerCanUpdate
} else {
hidden = true
}
self.setTextInputbarHidden(hidden, animated: true)
// hack required to get textInputBar.contentView + textView laid out correctly
self.textInputbar.layoutIfNeeded()
}
}
private var sentComments = [ListDiffable]()
// set to optimistically change the open/closed status
// clear when refreshing or on request failure
private var localStatusChange: (model: IssueStatusModel, event: IssueStatusEventModel)?
init(
client: GithubClient,
model: IssueDetailsModel,
scrollToBottom: Bool = false
) {
self.client = client
self.model = model
self.addCommentClient = AddCommentClient(client: client)
// trick into thinking already scrolled to bottom after load
self.hasScrolledToBottom = !scrollToBottom
// force unwrap, this absolutely must work
super.init(collectionViewLayout: UICollectionViewFlowLayout())!
self.hidesBottomBarWhenPushed = true
self.addCommentClient.addListener(listener: self)
// not registered until request is finished and self.registerPrefixes(...) is called
// must have user autocompletes
autocomplete.configure(tableView: autoCompletionView, delegate: self)
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
override func viewDidLoad() {
super.viewDidLoad()
makeBackBarItemEmpty()
navigationItem.configure(title: "#\(model.number)", subtitle: "\(model.owner)/\(model.repo)")
feed.viewDidLoad()
feed.adapter.dataSource = self
// override Feed bg color setting
view.backgroundColor = Styles.Colors.background
// override default SLKTextViewController values
isInverted = false
textView.placeholder = NSLocalizedString("Leave a comment", comment: "")
textView.placeholderColor = Styles.Colors.Gray.light.color
textView.keyboardType = .twitter
textView.layer.borderColor = Styles.Colors.Gray.border.color.cgColor
textInputbar.backgroundColor = Styles.Colors.Gray.lighter.color
rightButton.setTitle(NSLocalizedString("Send", comment: ""), for: .normal)
rightButton.setTitleColor(Styles.Colors.Blue.medium.color, for: .normal)
collectionView?.keyboardDismissMode = .interactive
// displayed once an add comment client is created (requires a gql subject id)
setTextInputbarHidden(true, animated: false)
let getMarkdownBlock = { [weak self] () -> (String) in
return self?.textView.text ?? ""
}
let actions = IssueTextActionsView.forMarkdown(
viewController: self,
getMarkdownBlock: getMarkdownBlock,
repo: model.repo,
owner: model.owner,
addBorder: false,
supportsImageUpload: false
)
// text input bar uses UIVisualEffectView, don't try to match it
actions.backgroundColor = .clear
textActionsController.configure(client: client, textView: textView, actions: actions)
// using visual format re: https://github.com/slackhq/SlackTextViewController/issues/596
// i'm not sure exactly what these would be in SnapKit (would pref SK tho)
let contentView = textInputbar.contentView
contentView.addSubview(actions)
let views = ["actions": actions]
contentView.addConstraints(NSLayoutConstraint.constraints(
withVisualFormat: "V:|[actions(30)]-4@999-|",
options: [],
metrics: nil,
views: views
))
contentView.addConstraints(NSLayoutConstraint.constraints(
withVisualFormat: "H:|[actions]|",
options: [],
metrics: nil,
views: views
))
self.textInputbar.layoutIfNeeded()
let rightItem = UIBarButtonItem(
image: UIImage(named: "bullets-hollow"),
style: .plain,
target: self,
action: #selector(IssuesViewController.onMore(sender:))
)
rightItem.accessibilityLabel = NSLocalizedString("More options", comment: "")
navigationItem.rightBarButtonItem = rightItem
if #available(iOS 11.0, *) {
navigationItem.largeTitleDisplayMode = .never
}
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
feed.viewDidAppear(animated)
let informator = HandoffInformator(
activityName: "viewIssue",
activityTitle: "\(model.owner)/\(model.repo)#\(model.number)",
url: externalURL
)
setupUserActivity(with: informator)
}
override func viewDidDisappear(_ animated: Bool) {
super.viewDidDisappear(animated)
invalidateUserActivity()
}
override func viewWillLayoutSubviews() {
super.viewWillLayoutSubviews()
feed.viewWillLayoutSubviews(view: view)
}
// MARK: SLKTextViewController overrides
override func keyForTextCaching() -> String? {
return "issue.\(model.owner).\(model.repo).\(model.number)"
}
override func didPressRightButton(_ sender: Any?) {
// get text before calling super b/c it will clear it
let text = textView.text
super.didPressRightButton(sender)
if let subjectId = current?.subjectId,
let text = text {
addCommentClient.addComment(
subjectId: subjectId,
body: text
)
}
}
override func didChangeAutoCompletionPrefix(_ prefix: String, andWord word: String) {
autocomplete.didChange(tableView: autoCompletionView, prefix: prefix, word: word)
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return autocomplete.resultCount(prefix: foundPrefix)
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
return autocomplete.cell(tableView: tableView, prefix: foundPrefix, indexPath: indexPath)
}
override func heightForAutoCompletionView() -> CGFloat {
return autocomplete.resultHeight(prefix: foundPrefix)
}
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
if let accept = autocomplete.accept(prefix: foundPrefix, indexPath: indexPath) {
acceptAutoCompletion(with: accept + " ", keepPrefix: false)
}
}
override func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return autocomplete.cellHeight
}
// MARK: Private API
var externalURL: URL {
return URL(string: "https://github.com/\(model.owner)/\(model.repo)/issues/\(model.number)")!
}
func closeAction() -> UIAlertAction? {
guard current?.viewerCanUpdate == true,
let status = localStatusChange?.model.status ?? current?.status.status,
status != .merged
else { return nil }
return AlertAction.toggleIssue(status) { [weak self] _ in
self?.setStatus(close: status == .open)
Haptic.triggerNotification(.success)
}
}
func lockAction() -> UIAlertAction? {
guard current?.viewerCanUpdate == true, let locked = localStatusChange?.model.locked ?? current?.status.locked else {
return nil
}
return AlertAction.toggleLocked(locked) { [weak self] _ in
self?.setLocked(!locked)
Haptic.triggerNotification(.success)
}
}
func viewRepoAction() -> UIAlertAction? {
guard current != nil else { return nil }
let repo = RepositoryDetails(
owner: model.owner,
name: model.repo,
hasIssuesEnabled: current?.hasIssuesEnabled ?? false
)
let repoViewController = RepositoryViewController(client: client, repo: repo)
weak var weakSelf = self
return AlertAction(AlertActionBuilder { $0.rootViewController = weakSelf })
.view(repo: repoViewController)
}
func bookmarkAction() -> UIAlertAction? {
guard let current = current else { return nil }
let bookmarkModel = BookmarkModel(
type: current.pullRequest ? .pullRequest : .issue,
name: model.repo,
owner: model.owner,
number: model.number,
title: current.title.attributedText.string
)
let store = BookmarksStore(client.userSession?.token)
let isNewBookmark = !store.contains(bookmark: bookmarkModel)
return AlertAction.toggleBookmark(isNewBookmark) { _ in
if isNewBookmark {
store.add(bookmark: bookmarkModel)
} else {
store.remove(bookmark: bookmarkModel)
}
Haptic.triggerNotification(.success)
}
}
@objc
func onMore(sender: UIBarButtonItem) {
let issueType = current?.pullRequest == true
? Constants.Strings.pullRequest
: Constants.Strings.issue
let alertTitle = "\(issueType) #\(model.number)"
let alert = UIAlertController.configured(title: alertTitle, preferredStyle: .actionSheet)
weak var weakSelf = self
let alertBuilder = AlertActionBuilder { $0.rootViewController = weakSelf }
alert.addActions([
closeAction(),
lockAction(),
AlertAction(alertBuilder).share([externalURL], activities: [TUSafariActivity()]) { $0.popoverPresentationController?.barButtonItem = sender },
AlertAction(alertBuilder).openInSafari(url: externalURL),
viewRepoAction(),
bookmarkAction(),
AlertAction.cancel()
])
alert.popoverPresentationController?.barButtonItem = sender
present(alert, animated: true)
}
func fetch(previous: Bool) {
// on head load, reset all optimistic state
if !previous {
localStatusChange = nil
}
client.fetch(
owner: model.owner,
repo: model.repo,
number: model.number,
width: view.bounds.width,
prependResult: previous ? current : nil
) { [weak self] resultType in
switch resultType {
case .success(let result):
// clear pending comments since they should now be part of the payload
// only clear when doing a refresh load
if previous {
self?.sentComments.removeAll()
}
self?.autocomplete.add(UserAutocomplete(mentionableUsers: result.mentionableUsers))
self?.current = result
default: break
}
self?.feed.finishLoading(dismissRefresh: true) {
if self?.hasScrolledToBottom != true {
self?.hasScrolledToBottom = true
self?.feed.collectionView.slk_scrollToBottom(animated: true)
}
}
}
}
func onPreview() {
let controller = IssuePreviewViewController(
markdown: textView.text,
owner: model.owner,
repo: model.repo
)
showDetailViewController(controller, sender: nil)
}
func setStatus(close: Bool) {
guard let currentStatus = localStatusChange?.model ?? current?.status else { return }
let localModel = IssueStatusModel(
status: close ? .closed : .open,
pullRequest: currentStatus.pullRequest,
locked: currentStatus.locked
)
let localEvent = IssueStatusEventModel(
id: UUID().uuidString,
actor: client.sessionManager.focusedUserSession?.username ?? Constants.Strings.unknown,
commitHash: nil,
date: Date(),
status: close ? .closed : .reopened,
pullRequest: currentStatus.pullRequest
)
localStatusChange = (localModel, localEvent)
feed.adapter.performUpdates(animated: true)
client.setStatus(
owner: model.owner,
repo: model.repo,
number: model.number,
status: close ? .closed : .open
) { [weak self] result in
switch result {
case .error:
self?.localStatusChange = nil
self?.feed.adapter.performUpdates(animated: true)
ToastManager.showGenericError()
default: break // dont need to handle success since updated optimistically
}
}
}
func setLocked(_ locked: Bool) {
guard let currentStatus = localStatusChange?.model ?? current?.status else { return }
let localModel = IssueStatusModel(
status: currentStatus.status,
pullRequest: currentStatus.pullRequest,
locked: locked
)
let localEvent = IssueStatusEventModel(
id: UUID().uuidString,
actor: client.sessionManager.focusedUserSession?.username ?? Constants.Strings.unknown,
commitHash: nil,
date: Date(),
status: locked ? .locked : .unlocked,
pullRequest: currentStatus.pullRequest
)
localStatusChange = (localModel, localEvent)
feed.adapter.performUpdates(animated: true)
client.setLocked(
owner: model.owner,
repo: model.repo,
number: model.number,
locked: locked
) { [weak self] result in
switch result {
case .error:
self?.localStatusChange = nil
self?.feed.adapter.performUpdates(animated: true)
ToastManager.showGenericError()
default: break // dont need to handle success since updated optimistically
}
}
}
// MARK: ListAdapterDataSource
func objects(for listAdapter: ListAdapter) -> [ListDiffable] {
guard let current = self.current else { return [] }
var objects: [ListDiffable] = [
localStatusChange?.model ?? current.status,
current.title,
current.labels
]
if let milestone = current.milestone {
objects.append(milestone)
}
objects.append(current.assignee)
if let reviewers = current.reviewers {
objects.append(reviewers)
}
if current.pullRequest {
objects.append(viewFilesModel)
}
if current.hasPreviousPage {
objects.append(IssueNeckLoadModel())
}
if let rootComment = current.rootComment {
objects.append(rootComment)
}
objects += current.timelineViewModels
objects += sentComments
if let event = localStatusChange?.event {
objects.append(event)
}
return objects
}
func listAdapter(_ listAdapter: ListAdapter, sectionControllerFor object: Any) -> ListSectionController {
if let object = object as? ListDiffable, object === viewFilesModel {
return IssueViewFilesSectionController(issueModel: model, client: client)
}
switch object {
case is NSAttributedStringSizing: return IssueTitleSectionController()
case is IssueCommentModel: return IssueCommentSectionController(model: model, client: client, delegate: self)
case is IssueLabelsModel: return IssueLabelsSectionController(issueModel: model, client: client)
case is IssueStatusModel: return IssueStatusSectionController()
case is IssueLabeledModel: return IssueLabeledSectionController(issueModel: model)
case is IssueStatusEventModel: return IssueStatusEventSectionController(issueModel: model)
case is IssueDiffHunkModel: return IssueDiffHunkSectionController()
case is IssueReviewModel: return IssueReviewSectionController(client: client)
case is IssueReferencedModel: return IssueReferencedSectionController(client: client)
case is IssueReferencedCommitModel: return IssueReferencedCommitSectionController()
case is IssueRenamedModel: return IssueRenamedSectionController()
case is IssueRequestModel: return IssueRequestSectionController()
case is IssueAssigneesModel: return IssueAssigneesSectionController()
case is IssueMilestoneEventModel: return IssueMilestoneEventSectionController()
case is IssueCommitModel: return IssueCommitSectionController(issueModel: model)
case is IssueNeckLoadModel: return IssueNeckLoadSectionController(delegate: self)
case is IssueMilestoneModel: return IssueMilestoneSectionController(issueModel: model)
default: fatalError("Unhandled object: \(object)")
}
}
func emptyView(for listAdapter: ListAdapter) -> UIView? {
switch feed.status {
case .idle:
let emptyView = EmptyView()
emptyView.label.text = NSLocalizedString("Issue cannot be found", comment: "")
return emptyView
case .loading, .loadingNext:
return nil
}
}
// MARK: FeedDelegate
func loadFromNetwork(feed: Feed) {
fetch(previous: false)
}
func loadNextPage(feed: Feed) -> Bool {
return false
}
// MARK: AddCommentListener
func didSendComment(
client: AddCommentClient,
id: String,
commentFields: CommentFields,
reactionFields: ReactionFields,
viewerCanUpdate: Bool,
viewerCanDelete: Bool
) {
guard let comment = createCommentModel(
id: id,
commentFields: commentFields,
reactionFields: reactionFields,
width: view.bounds.width,
owner: model.owner,
repo: model.repo,
threadState: .single,
viewerCanUpdate: viewerCanUpdate,
viewerCanDelete: viewerCanDelete,
isRoot: false
)
else { return }
sentComments.append(comment)
let collectionView = feed.collectionView
feed.adapter.performUpdates(animated: false, completion: { _ in
collectionView.slk_scrollToBottom(animated: true)
})
}
func didFailSendingComment(client: AddCommentClient, subjectId: String, body: String) {
textView.text = body
}
// MARK: IssueCommentAutocompleteDelegate
func didFinish(autocomplete: IssueCommentAutocomplete, hasResults: Bool) {
showAutoCompletionView(hasResults)
}
func didChangeStore(autocomplete: IssueCommentAutocomplete) {
registerPrefixes(forAutoCompletion: autocomplete.prefixes)
autoCompletionView.reloadData()
}
// MARK: FeedSelectionProviding
var feedContainsSelection: Bool {
return feed.collectionView.indexPathsForSelectedItems?.count != 0
}
// MARK: IssueNeckLoadSectionControllerDelegate
func didSelect(sectionController: IssueNeckLoadSectionController) {
fetch(previous: true)
}
// MARK: IssueCommentSectionControllerDelegate
func didEdit(sectionController: IssueCommentSectionController) {
}
}