Adding a duration selection action sheet for workout targets

Loop.xcodeproj/project.pbxproj

@@ -127,6 +127,7 @@
 		43EDDBF31C361C75007D89B5 /* xDripG5.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 43EDDBF11C361C75007D89B5 /* xDripG5.framework */; };
 		43F41C331D3A17AA00C11ED6 /* ChartAxisValueDoubleUnit.swift in Sources */ = {isa = PBXBuildFile; fileRef = 43F41C321D3A17AA00C11ED6 /* ChartAxisValueDoubleUnit.swift */; };
 		43F41C351D3B623800C11ED6 /* ChartPointsTouchHighlightLayerViewCache.swift in Sources */ = {isa = PBXBuildFile; fileRef = 43F41C341D3B623800C11ED6 /* ChartPointsTouchHighlightLayerViewCache.swift */; };
+		43F41C371D3BF32400C11ED6 /* UIAlertController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 43F41C361D3BF32400C11ED6 /* UIAlertController.swift */; };
 		43F4EF1D1BA2A57600526CE1 /* DiagnosticLogger.swift in Sources */ = {isa = PBXBuildFile; fileRef = 43F4EF1C1BA2A57600526CE1 /* DiagnosticLogger.swift */; };
 		43F5C2C91B929C09003EB13D /* HealthKit.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 43F5C2C81B929C09003EB13D /* HealthKit.framework */; };
 		43F5C2DB1B92A5E1003EB13D /* SettingsTableViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 43F5C2DA1B92A5E1003EB13D /* SettingsTableViewController.swift */; };
@@ -339,6 +340,7 @@
 		43EDEE6B1CF2E12A00393BE3 /* Loop.entitlements */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.xml; path = Loop.entitlements; sourceTree = "<group>"; };
 		43F41C321D3A17AA00C11ED6 /* ChartAxisValueDoubleUnit.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = ChartAxisValueDoubleUnit.swift; sourceTree = "<group>"; };
 		43F41C341D3B623800C11ED6 /* ChartPointsTouchHighlightLayerViewCache.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = ChartPointsTouchHighlightLayerViewCache.swift; sourceTree = "<group>"; };
+		43F41C361D3BF32400C11ED6 /* UIAlertController.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = UIAlertController.swift; sourceTree = "<group>"; };
 		43F4EF1C1BA2A57600526CE1 /* DiagnosticLogger.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = DiagnosticLogger.swift; sourceTree = "<group>"; };
 		43F5C2C81B929C09003EB13D /* HealthKit.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = HealthKit.framework; path = System/Library/Frameworks/HealthKit.framework; sourceTree = SDKROOT; };
 		43F5C2D41B92A4A6003EB13D /* Info.plist */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
@@ -583,6 +585,7 @@
 				4398973A1CD2FC2000223065 /* NSDateFormatter.swift */,
 				439897341CD2F7DE00223065 /* NSTimeInterval.swift */,
 				43E344A31B9E1B1C00C85C07 /* NSUserDefaults.swift */,
+				43F41C361D3BF32400C11ED6 /* UIAlertController.swift */,
 				43DE92501C541832001FFDE1 /* UIColor.swift */,
 				437CEEE31CDE5C0A003C8C80 /* UIImage.swift */,
 				434FF1ED1CF27EEF000DB779 /* UITableViewCell.swift */,
@@ -991,6 +994,7 @@
 				438849EC1D29EC34003B3F23 /* AmplitudeService.swift in Sources */,
 				43DBF0571C93F6EB00B3C386 /* ReservoirTableViewController.swift in Sources */,
 				435400341C9F878D00D5819C /* SetBolusUserInfo.swift in Sources */,
+				43F41C371D3BF32400C11ED6 /* UIAlertController.swift in Sources */,
 				437CEEBC1CD6DE6A003C8C80 /* HUDView.swift in Sources */,
 				434F545F1D288345002A9274 /* ShareService.swift in Sources */,
 				4354003A1C9FB81100D5819C /* UIColor.swift in Sources */,

Loop/Extensions/UIAlertController.swift

@@ -0,0 +1,46 @@
+//
+//  UIAlertController.swift
+//  Loop
+//
+//  Created by Nate Racklyeft on 7/17/16.
+//  Copyright © 2016 Nathan Racklyeft. All rights reserved.
+//
+
+import UIKit
+
+
+extension UIAlertController {
+    /**
+     Initializes an ActionSheet-styled controller for selecting a workout duration
+
+     - parameter handler: A closure to execute when the sheet is dismissed after selection. The closure has a single argument:
+        - endDate: The date at which the user selected the workout to end
+     */
+    convenience init(workoutDurationSelectionHandler handler: (endDate: NSDate) -> Void) {
+        self.init(
+            title: NSLocalizedString("Use Workout Glucose Targets", comment: "The title of the alert controller used to select a duration for workout targets"),
+            message: nil,
+            preferredStyle: .ActionSheet
+        )
+
+        let formatter = NSDateComponentsFormatter()
+        formatter.allowsFractionalUnits = false
+        formatter.unitsStyle = .Full
+
+        for interval in [1, 2].map({ NSTimeInterval(hours: $0) }) {
+            let duration = NSLocalizedString("For %1$@", comment: "The format string used to describe a finite workout targets duration")
+
+            addAction(UIAlertAction(title: String(format: duration, formatter.stringFromTimeInterval(interval)!), style: .Default) { _ in
+                handler(endDate: NSDate(timeIntervalSinceNow: interval))
+            })
+        }
+
+        let distantFuture = NSLocalizedString("Indefinitely", comment: "The title of a target alert action specifying an indefinitely long workout targets duration")
+        addAction(UIAlertAction(title: distantFuture, style: .Default) { _ in
+            handler(endDate: NSDate.distantFuture())
+        })
+
+        let cancel = NSLocalizedString("Cancel", comment: "The title of the cancel action in an action sheet")
+        addAction(UIAlertAction(title: cancel, style: .Cancel, handler: nil))
+    }
+}

Loop/Managers/DeviceDataManager.swift

@@ -713,14 +713,13 @@ class DeviceDataManager: CarbStoreDelegate, TransmitterDelegate {
         return override.endDate.timeIntervalSinceNow > 0
     }
 
-    /// Attempts to enable workout glucose targets for the given duration, and returns true if successful.
+    /// Attempts to enable workout glucose targets until the given date, and returns true if successful.
     /// TODO: This can live on the schedule itself once its a value type, since didSet would invoke when mutated.
-    func enableWorkoutMode(duration duration: NSTimeInterval) -> Bool {
+    func enableWorkoutMode(until endDate: NSDate) -> Bool {
         guard let glucoseTargetRangeSchedule = glucoseTargetRangeSchedule else {
             return false
         }
 
-        let endDate = NSDate(timeIntervalSinceNow: duration)
         glucoseTargetRangeSchedule.setWorkoutOverrideUntilDate(endDate)
 
         NSNotificationCenter.defaultCenter().postNotificationName(self.dynamicType.LoopSettingsUpdatedNotification, object: self)

Loop/View Controllers/StatusTableViewController.swift

@@ -739,11 +739,14 @@ class StatusTableViewController: UITableViewController, UIGestureRecognizerDeleg
     }
 
     @IBAction func toggleWorkoutMode(sender: UIBarButtonItem) {
-        // TODO: Display an action sheet to select a duration
         if let workoutModeEnabled = workoutMode where workoutModeEnabled {
             dataManager.disableWorkoutMode()
         } else {
-            dataManager.enableWorkoutMode(duration: NSTimeInterval(hours: 1))
+            let vc = UIAlertController(workoutDurationSelectionHandler: { (endDate) in
+                self.dataManager.enableWorkoutMode(until: endDate)
+            })
+
+            presentViewController(vc, animated: true, completion: nil)
         }
     }