- add low battery notification with option to select battery level (disabled/3%/5%/10%/15%/20%/30%/40%/50%)

Modules/Battery/main.swift

@@ -27,7 +27,7 @@ struct Battery_Usage: value_t {
     var temperature: Double = 0
     
     var ACwatts: Int = 0
-    var ACstatus: Bool = true
+    var ACstatus: Bool = false
     
     var timeToEmpty: Int = 0
     var timeToCharge: Int = 0
@@ -42,12 +42,18 @@ struct Battery_Usage: value_t {
 public class Battery: Module {
     private var usageReader: UsageReader? = nil
     private let popupView: Popup = Popup()
+    private var settingsView: Settings
+    
+    private let store: UnsafePointer<Store>
     
     public init(_ store: UnsafePointer<Store>) {
+        self.store = store
+        self.settingsView = Settings("Battery", store: store)
+        
         super.init(
             store: store,
             popup: self.popupView,
-            settings: nil
+            settings: self.settingsView
         )
         guard self.available else { return }
         
@@ -76,6 +82,7 @@ public class Battery: Module {
             return
         }
         
+        self.checkNotification(value: value!)
         self.popupView.usageCallback(value!)
         if let widget = self.widget as? Mini {
             widget.setValue(abs(value!.level), sufix: "%")
@@ -88,4 +95,24 @@ public class Battery: Module {
             )
         }
     }
+    
+    private func checkNotification(value: Battery_Usage) {
+        let level = self.store.pointee.string(key: "\(self.config.name)_lowLevelNotification", defaultValue: "0.15")
+        if level == "Disabled" {
+            return
+        }
+        
+        var subtitle = "\((Int(value.level*100)))% remaining"
+        if value.timeToEmpty != 0 {
+            subtitle += " (\(Double(value.timeToEmpty*60).printSecondsToHoursMinutesSeconds()))"
+        }
+        if let notificationLevel = Double(level), value.level <= notificationLevel {
+            showNotification(
+                title: "Low battery",
+                subtitle: subtitle,
+                id: "battery-level",
+                icon: NSImage(named: NSImage.Name("low-battery"))!
+            )
+        }
+    }
 }

Modules/Battery/settings.swift

@@ -0,0 +1,80 @@
+//
+//  settings.swift
+//  Battery
+//
+//  Created by Serhiy Mytrovtsiy on 15/07/2020.
+//  Using Swift 5.0.
+//  Running on macOS 10.15.
+//
+//  Copyright © 2020 Serhiy Mytrovtsiy. All rights reserved.
+//
+
+import Cocoa
+import StatsKit
+import ModuleKit
+import SystemConfiguration
+
+internal class Settings: NSView, Settings_v {
+    public var callback: (() -> Void) = {}
+    
+    private let title: String
+    private let store: UnsafePointer<Store>
+    private var button: NSPopUpButton?
+    
+    private let levelsList: [String] = ["Disabled", "0.03", "0.05", "0.1", "0.15", "0.2", "0.25", "0.3", "0.4", "0.5"]
+    private var lowLevelNotification: String {
+        get {
+            return self.store.pointee.string(key: "\(self.title)_lowLevelNotification", defaultValue: "0.15")
+        }
+    }
+    
+    public init(_ title: String, store: UnsafePointer<Store>) {
+        self.title = title
+        self.store = store
+        
+        super.init(frame: CGRect(x: Constants.Settings.margin, y: Constants.Settings.margin, width: Constants.Settings.width - (Constants.Settings.margin*2), height: 0))
+        
+        self.wantsLayer = true
+        self.canDrawConcurrently = true
+    }
+    
+    required init?(coder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+    
+    public func load(widget: widget_t) {
+        self.subviews.forEach{ $0.removeFromSuperview() }
+        
+        let rowHeight: CGFloat = 30
+        
+        let levels: [String] = self.levelsList.map { (v: String) -> String in
+            if let level = Double(v) {
+                return "\(Int(level*100))%"
+            }
+            return v
+        }
+        
+        self.addSubview(SelectTitleRow(
+            frame: NSRect(
+                x:Constants.Settings.margin,
+                y: Constants.Settings.margin + (rowHeight + Constants.Settings.margin) * 0,
+                width: self.frame.width - (Constants.Settings.margin*2),
+                height: rowHeight
+            ),
+            title: "Low level notification",
+            action: #selector(changeUpdateInterval),
+            items: levels,
+            selected: self.lowLevelNotification == "Disabled" ? self.lowLevelNotification : "\(Int((Double(self.lowLevelNotification) ?? 0)*100))%"
+        ))
+        
+        self.setFrameSize(NSSize(width: self.frame.width, height: 30 + (Constants.Settings.margin*2)))
+    }
+    
+    @objc private func changeUpdateInterval(_ sender: NSMenuItem) {
+        if sender.title == "Disabled" {
+            store.pointee.set(key: "\(self.title)_lowLevelNotification", value: sender.title)
+        } else if let value = Double(sender.title.replacingOccurrences(of: "%", with: "")) {
+            store.pointee.set(key: "\(self.title)_lowLevelNotification", value: "\(value/100)")
+        }
+    }
+}