Add suspend threshold line to glucose chart

Loop Status Extension/StatusViewController.swift

@@ -36,6 +36,7 @@ class StatusViewController: UIViewController, NCWidgetProviding {
                 axisLine: .axisLineColor,
                 axisLabel: .axisLabelColor,
                 grid: .gridColor,
+                threshold: .thresholdLineColor,
                 glucoseTint: .glucoseTintColor,
                 doseTint: .doseTintColor
             ),
@@ -295,6 +296,7 @@ class StatusViewController: UIViewController, NCWidgetProviding {
             }
 
             self.charts.targetGlucoseSchedule = defaults.loopSettings?.glucoseTargetRangeSchedule
+            self.charts.suspendThresholdValue = nil // do not add SuspendThreshold line to the widget
 
             self.charts.prerender()
             self.glucoseChartContentView.reloadChart()

Loop Status Extension/UIColor+Widget.swift

@@ -25,4 +25,6 @@ extension UIColor {
     @nonobjc static let pumpStatusNormal = UIColor(red: 100 / 255, green: 101 / 255, blue: 105 / 255, alpha: 1)
 
     @nonobjc static let subtitleLabelColor = UIColor(white: 0, alpha: 0.4)
+
+    @nonobjc static let thresholdLineColor = UIColor.HIGRedColor()
 }

Loop/Extensions/ChartColorPalette+Loop.swift

@@ -11,6 +11,6 @@ import LoopUI
 
 extension ChartColorPalette {
     static var `default`: ChartColorPalette {
-        return ChartColorPalette(axisLine: .axisLineColor, axisLabel: .axisLabelColor, grid: .gridColor, glucoseTint: .glucoseTintColor, doseTint: .doseTintColor)
+        return ChartColorPalette(axisLine: .axisLineColor, axisLabel: .axisLabelColor, grid: .gridColor, threshold: .thresholdLineColor, glucoseTint: .glucoseTintColor, doseTint: .doseTintColor)
     }
 }

Loop/Extensions/UIColor+Loop.swift

@@ -23,4 +23,6 @@ extension UIColor {
     @nonobjc static let gridColor = UIColor(white: 193 / 255, alpha: 1)
 
     @nonobjc static let pumpStatusNormal = secondaryLabelColor
+
+    @nonobjc static let thresholdLineColor = UIColor.HIGRedColor()
 }

Loop/View Controllers/PredictionTableViewController.swift

@@ -132,6 +132,7 @@ class PredictionTableViewController: ChartsTableViewController, IdentifiableClas
 
             if self.refreshContext.remove(.targets) != nil {
                 self.charts.targetGlucoseSchedule = manager.settings.glucoseTargetRangeSchedule
+                self.charts.suspendThresholdValue = manager.settings.suspendThreshold?.quantity.doubleValue(for: self.charts.glucoseUnit)
             }
 
             reloadGroup.leave()

Loop/View Controllers/StatusTableViewController.swift

@@ -378,6 +378,7 @@ final class StatusTableViewController: ChartsTableViewController {
             if currentContext.contains(.targets) {
                 self.charts.targetGlucoseSchedule = self.deviceManager.loopManager.settings.glucoseTargetRangeSchedule
             }
+            self.charts.suspendThresholdValue = self.deviceManager.loopManager.settings.suspendThreshold?.quantity.doubleValue(for: self.charts.glucoseUnit)
 
             // Active Insulin
             if let iobValues = iobValues {

LoopUI/Managers/StatusChartsManager.swift

@@ -216,6 +216,9 @@ public final class StatusChartsManager {
             glucoseChart = nil
         }
     }
+
+    /// Suspend Threshold value
+    public var suspendThresholdValue: Double? = nil
 
     /// The chart points for IOB
     public var iobPoints: [ChartPoint] = [] {
@@ -368,6 +371,20 @@ public final class StatusChartsManager {
                 )
             ]
         )
+
+        // SuspendThreshold line
+        var suspendThresholdLayer: ChartPointsLineLayer? = nil
+        if suspendThresholdValue != nil {
+            if suspendThresholdValue! >= yAxisLayer.axis.first {
+                let lineModel = ChartLineModel(
+                    chartPoints: [ChartPoint(x: ChartAxisValueDouble(xAxisLayer.axis.first),
+                                             y: ChartAxisValueDouble(suspendThresholdValue!)),
+                                  ChartPoint(x: ChartAxisValueDouble(xAxisLayer.axis.last),
+                                             y: ChartAxisValueDouble(suspendThresholdValue!))],
+                    lineColor: colors.threshold.withAlphaComponent(0.4), lineWidth: 1, animDuration: 0, animDelay: 0)
+                suspendThresholdLayer = ChartPointsLineLayer(xAxis: xAxisLayer.axis, yAxis: yAxisLayer.axis, lineModels: [lineModel])
+            }
+        }
 
         // Grid lines
         let gridLayer = ChartGuideLinesForValuesLayer(xAxis: xAxisLayer.axis, yAxis: yAxisLayer.axis, settings: guideLinesLayerSettings, axisValuesX: Array(xAxisValues.dropFirst().dropLast()), axisValuesY: yAxisValues)
@@ -411,6 +428,7 @@ public final class StatusChartsManager {
         let layers: [ChartLayer?] = [
             gridLayer,
             targetsLayer,
+            suspendThresholdLayer,
             xAxisLayer,
             yAxisLayer,
             glucoseChartCache?.highlightLayer,

LoopUI/Models/ChartColorPalette.swift

@@ -13,13 +13,15 @@ public struct ChartColorPalette {
     public let axisLine: UIColor
     public let axisLabel: UIColor
     public let grid: UIColor
+    public let threshold: UIColor
     public let glucoseTint: UIColor
     public let doseTint: UIColor
 
-    public init(axisLine: UIColor, axisLabel: UIColor, grid: UIColor, glucoseTint: UIColor, doseTint: UIColor) {
+    public init(axisLine: UIColor, axisLabel: UIColor, grid: UIColor, threshold: UIColor, glucoseTint: UIColor, doseTint: UIColor) {
         self.axisLine = axisLine
         self.axisLabel = axisLabel
         self.grid = grid
+        self.threshold = threshold
         self.glucoseTint = glucoseTint
         self.doseTint = doseTint
     }