[IOS-172]: Changed minutely precipitation UI

1Weather/UI/SharedViews/MinutelyForecastView/MinutelyForecastView.swift

@@ -39,7 +39,7 @@ private class MinutelyLevelView: UIView {
         layer.shadowColor = UIColor(hex: 0xd8ddfa).withAlphaComponent(0.8).cgColor
         layer.shadowOffset = .init(width: 0, height: 3)
         layer.shadowRadius = 3
-        layer.shadowOpacity = 1
+        layer.shadowOpacity = interfaceStyle == .light ? 1 : 0
     }
     
     required init?(coder: NSCoder) {
@@ -53,6 +53,11 @@ private class MinutelyLevelView: UIView {
         gradient.frame = bounds
         layer.shadowPath = UIBezierPath(roundedRect: bounds, cornerRadius: bounds.width / 2).cgPath
     }
+    
+    override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {
+        super.traitCollectionDidChange(previousTraitCollection)
+        layer.shadowOpacity = interfaceStyle == .light ? 1 : 0
+    }
 }
 
 class MinutelyForecastView: UIView {
@@ -120,7 +125,9 @@ class MinutelyForecastView: UIView {
         self.location = location
         self.forecastType = forecastType
         self.dateFormatter.timeZone = location.timeZone
-        centerDashline.strokeColor = kTemperatureColors.last?.cgColor
+        
+        centerDashline.strokeColor = forecastType == .temperature ? kTemperatureColors.last?.cgColor
+                                                                    : kPrecipitationColors.last?.cgColor
         
         prepareMinutelyItems()
         if let firstMinutelyItem = minutelyForecast.first {
@@ -184,10 +191,36 @@ class MinutelyForecastView: UIView {
             }
         }
         
+        switch forecastType {
+        case .temperature:
+            updateTemperatureChart()
+        case .precipitation:
+            updatePrecipitationChart()
+        }
+        
+        levelsStackView.layoutIfNeeded()
+        verticalStackView.layoutIfNeeded()
+        
+        //Levels dashline
+        for _ in 0..<verticalStackView.arrangedSubviews.count {
+            let levelShape = CAShapeLayer()
+            levelShape.opacity = 0.3
+            levelShape.lineWidth = 1
+            levelShape.lineDashPattern = [4, 5]
+            levelShape.strokeColor = UIColor(hex: 0x979797).cgColor
+            layer.insertSublayer(levelShape, at: 0)
+            levelsDashline.append(levelShape)
+        }
+        
+        for (index, view) in levelsStackView.arrangedSubviews.enumerated() {
+            levelsPositionXCache[index] = view.frame.origin.x
+        }
+    }
+    
+    private func updateTemperatureChart() {
         guard
             let maxTemp = (minutelyForecast.compactMap{ $0.temp }.max{ $0.value < $1.value} ),
             let minTemp = (minutelyForecast.compactMap{ $0.temp }.min{ $0.value < $1.value} )
-        
         else {
             return
         }
@@ -216,9 +249,10 @@ class MinutelyForecastView: UIView {
         }
         
         for index in 0..<minutelyForecast.count {
-            let view = MinutelyLevelView(forecastType: self.forecastType)
+            let view = MinutelyLevelView(forecastType: .temperature)
             levelsStackView.addArrangedSubview(view)
-            let level = (0.05 + 0.9 * ((minutelyForecast[index].temp.value - minTemp.value) / (maxTemp.value - minTemp.value)))
+            let diff = maxTemp.value - minTemp.value == 0 ? 1 : maxTemp.value - minTemp.value
+            let level = (0.05 + 0.9 * ((minutelyForecast[index].temp.value - minTemp.value) / diff))
             view.snp.makeConstraints { make in
                 make.width.equalTo(kLevelWidth)
                 make.height.equalToSuperview().multipliedBy(level)
@@ -237,23 +271,62 @@ class MinutelyForecastView: UIView {
                 }
             }
         }
+    }
     
-        levelsStackView.layoutIfNeeded()
-        verticalStackView.layoutIfNeeded()
+    private func updatePrecipitationChart() {
+        guard
+            let maxPrecip = (minutelyForecast.compactMap{ $0.precipitation }.max{ $0 < $1 }),
+            let minPrecip = (minutelyForecast.compactMap{ $0.precipitation }.min{ $0 < $1 })
         
-        //Levels dashline
-        for _ in 0..<verticalStackView.arrangedSubviews.count {
-            let levelShape = CAShapeLayer()
-            levelShape.opacity = 0.3
-            levelShape.lineWidth = 1
-            levelShape.lineDashPattern = [4, 5]
-            levelShape.strokeColor = UIColor(hex: 0x979797).cgColor
-            layer.insertSublayer(levelShape, at: 0)
-            levelsDashline.append(levelShape)
+        else {
+            return
         }
         
-        for (index, view) in levelsStackView.arrangedSubviews.enumerated() {
-            levelsPositionXCache[index] = view.frame.origin.x
+        var uniqPrecips = minutelyForecast.compactMap{ $0.precipitation }.unique().sorted{$0 > $1}
+        if uniqPrecips.count > 4 {
+            let uniqMax = uniqPrecips.removeFirst()
+            let uniqMin = uniqPrecips.removeLast()
+            let midPoint = (uniqPrecips.count / 2)
+            
+            let firstHalf = uniqPrecips[..<midPoint]
+            let firstHalfTemp = firstHalf[firstHalf.startIndex + firstHalf.count / 2]
+            
+            let seconHalf = uniqPrecips[midPoint...]
+            let secondHalfTemp = seconHalf[seconHalf.startIndex + seconHalf.count / 2]
+            uniqPrecips = [uniqMax, firstHalfTemp, secondHalfTemp, uniqMin]
+        }
+       
+        for precipitation in uniqPrecips {
+            let label = UILabel()
+            label.text = "\(Int(precipitation * 100))%"
+            label.font = AppFont.SFPro.regular(size: 10)
+            label.setContentHuggingPriority(.fittingSizeLevel, for: .vertical)
+            label.sizeToFit()
+            verticalStackView.addArrangedSubview(label)
+        }
+        
+        for index in 0..<minutelyForecast.count {
+            let view = MinutelyLevelView(forecastType: .precipitation)
+            levelsStackView.addArrangedSubview(view)
+            let diff = maxPrecip - minPrecip == 0 ? 1 : maxPrecip - minPrecip
+            let level = (0.05 + 0.9 * ((minutelyForecast[index].precipitation - minPrecip) / diff))
+            view.snp.makeConstraints { make in
+                make.width.equalTo(kLevelWidth)
+                make.height.equalToSuperview().multipliedBy(level)
+            }
+            
+            let minutes = Calendar.current.component(.minute, from: minutelyForecast[index].time)
+            if minutes % 20 == 0 {
+                let label = UILabel()
+                label.font = AppFont.SFPro.bold(size: 12)
+                label.text = dateFormatter.string(from: minutelyForecast[index].time)
+                scrollView.addSubview(label)
+                
+                label.snp.makeConstraints { make in
+                    make.top.equalTo(view.snp.bottom).offset(12)
+                    make.centerX.equalTo(view)
+                }
+            }
         }
     }