Open Calendar app at the selected date

Calendr/Calendar/CalendarCellView.swift

@@ -15,6 +15,7 @@ class CalendarCellView: NSView {
     private let viewModel: Observable<CalendarCellViewModel>
     private let hoverObserver: AnyObserver<Date?>
     private let clickObserver: AnyObserver<Date>
+    private let doubleClickObserver: AnyObserver<Date>
     private let calendarScaling: Observable<Double>
 
     private let label = Label()
@@ -25,12 +26,14 @@ class CalendarCellView: NSView {
         viewModel: Observable<CalendarCellViewModel>,
         hoverObserver: AnyObserver<Date?>,
         clickObserver: AnyObserver<Date>,
+        doubleClickObserver: AnyObserver<Date>,
         calendarScaling: Observable<Double>
     ) {
 
         self.viewModel = viewModel
         self.hoverObserver = hoverObserver
         self.clickObserver = clickObserver
+        self.doubleClickObserver = doubleClickObserver
         self.calendarScaling = calendarScaling
 
         super.init(frame: .zero)
@@ -143,6 +146,11 @@ class CalendarCellView: NSView {
             .bind(to: clickObserver)
             .disposed(by: disposeBag)
 
+        rx.doubleClick
+            .withLatestFrom(viewModel.map(\.date))
+            .bind(to: doubleClickObserver)
+            .disposed(by: disposeBag)
+
         rx.mouseEntered
             .withLatestFrom(viewModel.map(\.date))
             .bind(to: hoverObserver)

Calendr/Calendar/CalendarView.swift

@@ -15,18 +15,21 @@ class CalendarView: NSView {
     private let viewModel: CalendarViewModel
     private let hoverObserver: AnyObserver<Date?>
     private let clickObserver: AnyObserver<Date>
+    private let doubleClickObserver: AnyObserver<Date>
 
     private let gridView = NSGridView(numberOfColumns: 8, rows: 7)
 
     init(
         viewModel: CalendarViewModel,
         hoverObserver: AnyObserver<Date?>,
-        clickObserver: AnyObserver<Date>
+        clickObserver: AnyObserver<Date>,
+        doubleClickObserver: AnyObserver<Date>
     ) {
 
         self.viewModel = viewModel
         self.hoverObserver = hoverObserver
         self.clickObserver = clickObserver
+        self.doubleClickObserver = doubleClickObserver
 
         super.init(frame: .zero)
 
@@ -145,6 +148,7 @@ class CalendarView: NSView {
                 viewModel: cellViewModel,
                 hoverObserver: hoverObserver,
                 clickObserver: clickObserver,
+                doubleClickObserver: doubleClickObserver,
                 calendarScaling: viewModel.calendarScaling
             )
             gridView.cell(atColumnIndex: 1 + day % 7, rowIndex: 1 + day / 7).contentView = cellView

Calendr/Config/Calendr.entitlements

@@ -8,5 +8,9 @@
 	<true/>
 	<key>com.apple.security.personal-information.calendars</key>
 	<true/>
+	<key>com.apple.security.temporary-exception.apple-events</key>
+	<array>
+		<string>com.apple.ical</string>
+	</array>
 </dict>
 </plist>

Calendr/Config/Info.plist

@@ -34,5 +34,7 @@
 	<string>NSApplication</string>
 	<key>NSRemindersUsageDescription</key>
 	<string>Calendr needs access to display your reminders.</string>
+	<key>NSAppleEventsUsageDescription</key>
+	<string>Calendr needs access to open Calendar app at the selected date.</string>
 </dict>
 </plist>

Calendr/Extensions/NSGestureRecognizer+Rx.swift

@@ -24,6 +24,7 @@ private class GestureProxy {
 extension Reactive where Base: NSView {
 
     var click: Observable<Void> { click { _ in } }
+    var doubleClick: Observable<Void> { click { $0.numberOfClicksRequired = 2 } }
 
     func click<T: NSClickGestureRecognizer> (_ configure: @escaping (T) -> Void) -> Observable<Void> {
         gesture(configure)

Calendr/Main/MainViewController.swift

@@ -42,6 +42,7 @@ class MainViewController: NSViewController, NSPopoverDelegate {
     private let disposeBag = DisposeBag()
     private var popoverDisposeBag = DisposeBag()
     private let dateClick = PublishSubject<Date>()
+    private let dateDoubleClick = PublishSubject<Date>()
     private let initialDate: BehaviorSubject<Date>
     private let selectedDate = PublishSubject<Date>()
     private let isShowingDetails = BehaviorSubject<Bool>(value: false)
@@ -127,7 +128,8 @@ class MainViewController: NSViewController, NSPopoverDelegate {
         calendarView = CalendarView(
             viewModel: calendarViewModel,
             hoverObserver: hoverObserver,
-            clickObserver: dateClick.asObserver()
+            clickObserver: dateClick.asObserver(),
+            doubleClickObserver: dateDoubleClick.asObserver()
         )
 
         let eventListEventsObservable = calendarViewModel.focusedDateEventsObservable
@@ -317,12 +319,20 @@ class MainViewController: NSViewController, NSPopoverDelegate {
         }
         .disposed(by: disposeBag)
 
-        calendarBtn.rx.tap.bind { [workspace] in
-            if let appUrl = workspace.urlForApplication(toOpen: URL(string: "webcal://")!) {
-                workspace.open(appUrl)
+        dateDoubleClick
+            .observe(on: ConcurrentDispatchQueueScheduler(qos: .userInteractive))
+            .bind { [weak self] date in
+                self?.openCalendar(at: date, mode: .day)
             }
-        }
-        .disposed(by: disposeBag)
+            .disposed(by: disposeBag)
+
+        calendarBtn.rx.tap
+            .withLatestFrom(selectedDate)
+            .observe(on: ConcurrentDispatchQueueScheduler(qos: .userInteractive))
+            .bind { [weak self] date in
+                self?.openCalendar(at: date, mode: .month)
+            }
+            .disposed(by: disposeBag)
 
         searchInput.rx.text
             .skipNil()
@@ -651,6 +661,30 @@ class MainViewController: NSViewController, NSPopoverDelegate {
 
         return dateSelector
     }
+
+    // MARK: - Scripts
+
+    private enum CalendarViewMode: String {
+        case day
+        case month
+    }
+
+    private func openCalendar(at date: Date, mode: CalendarViewMode) {
+        do {
+            let dateString = DateFormatter().with(style: .full).string(from: date)
+            try runScript("""
+                tell application "Calendar"
+                switch view to \(mode) view
+                view calendar at date ("\(dateString)")
+                end tell
+            """)
+        } catch {
+            debugPrint("Open Calendar script failed, fallback to workspace method")
+            if let appUrl = workspace.urlForApplication(toOpen: URL(string: "webcal://")!) {
+                workspace.open(appUrl)
+            }
+        }
+    }
 }
 
 private enum Constants {
@@ -659,3 +693,23 @@ private enum Constants {
         static let margin: CGFloat = 8
     }
 }
+
+// MARK: - Apple Script
+
+private enum ScriptError: Error {
+    case source
+    case compile
+    case execute
+}
+
+private func runScript(_ source: String) throws {
+    guard let script = NSAppleScript(source: source) else {
+        throw ScriptError.source
+    }
+    guard script.compileAndReturnError(nil) else {
+        throw ScriptError.compile
+    }
+    if script.executeAndReturnError(nil).description.isEmpty {
+        throw ScriptError.execute
+    }
+}

Calendr/Previews/CalendarViewPreview.swift

@@ -37,7 +37,8 @@ struct CalendarViewPreview: PreviewProvider {
                 notificationCenter: notificationCenter
             ),
             hoverObserver: hovered.asObserver(),
-            clickObserver: selected.asObserver()
+            clickObserver: selected.asObserver(),
+            doubleClickObserver: .dummy()
         )
         .preview()
         .fixedSize()