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// Copyright © 2015 Abhishek Banthia
import AppKit
import Foundation
class UpcomingEventsDataSource: NSObject, NSCollectionViewDataSource, NSCollectionViewDelegateFlowLayout {
private var upcomingEvents: [EventInfo] = []
private var eventCenter: EventCenter!
private weak var delegate: UpcomingEventPanelDelegate?
private static let panelWidth: CGFloat = 350.0
init(_ panelDelegate: UpcomingEventPanelDelegate?, _ center: EventCenter) {
super.init()
delegate = panelDelegate
eventCenter = center
}
func updateEventsDataSource(_ events: [EventInfo]) {
upcomingEvents = events
}
func collectionView(_: NSCollectionView, numberOfItemsInSection _: Int) -> Int {
if eventCenter.calendarAccessDenied() || eventCenter.calendarAccessNotDetermined() || upcomingEvents.isEmpty {
return 1
}
return upcomingEvents.count
}
func collectionView(_ collectionView: NSCollectionView, itemForRepresentedObjectAt indexPath: IndexPath) -> NSCollectionViewItem {
guard let item = collectionView.makeItem(withIdentifier: UpcomingEventViewItem.reuseIdentifier, for: indexPath) as? UpcomingEventViewItem else {
assertionFailure("Unable to make UpcomingEventViewItem")
return NSCollectionViewItem()
}
if eventCenter.calendarAccessNotDetermined() {
item.setupUndeterminedState(delegate)
return item
}
if upcomingEvents.isEmpty {
item.setupEmptyState()
return item
}
let currentEventInfo = upcomingEvents[indexPath.item]
let upcomingEventSubtitle = currentEventInfo.isAllDay ? "All-Day" : currentEventInfo.metadataForMeeting()
item.setup(currentEventInfo.event.title,
upcomingEventSubtitle,
currentEventInfo.event.calendar.color,
currentEventInfo.meetingURL,
delegate,
currentEventInfo.event.status == .canceled)
return item
}
func collectionView(_ collectionView: NSCollectionView, layout _: NSCollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> NSSize {
if eventCenter.calendarAccessNotDetermined() {
return NSSize(width: UpcomingEventsDataSource.panelWidth - 25, height: collectionView.frame.height - 15)
} else if upcomingEvents.isEmpty {
return NSSize(width: UpcomingEventsDataSource.panelWidth - 25, height: collectionView.frame.height - 15)
} else {
let currentEventInfo = upcomingEvents[indexPath.item]
let bufferWidth: CGFloat = currentEventInfo.meetingURL != nil ? 60.0 : 20.0
let attributedString = NSAttributedString(string: currentEventInfo.event.title, attributes: [NSAttributedString.Key.font: avenirBookFont])
let maxWidth = min(attributedString.size().width + bufferWidth, UpcomingEventsDataSource.panelWidth / 2)
return NSSize(width: maxWidth, height: collectionView.frame.height - 20)
}
}
}