Channel statistics improvements

submodules/GraphCore/Sources/Models/ChartLineData.swift

@@ -0,0 +1,81 @@
+//
+//  ChartLineData.swift
+//  GraphTest
+//
+//  Created by Andrei Salavei on 3/13/19.
+//  Copyright © 2019 Andrei Salavei. All rights reserved.
+//
+
+import Foundation
+#if os(macOS)
+import Cocoa
+#else
+import UIKit
+#endif
+
+struct ChartLineData {
+    var title: String
+    var color: GColor
+    var width: CGFloat?
+    var points: [CGPoint]
+}
+
+extension ChartLineData {
+    static func horizontalRange(lines: [ChartLineData]) -> ClosedRange<CGFloat>? {
+        guard let firstPoint = lines.first?.points.first else { return nil }
+        var hMin: CGFloat = firstPoint.x
+        var hMax: CGFloat = firstPoint.x
+        
+        for line in lines {
+            if let first = line.points.first,
+                let last = line.points.last {
+                hMin = min(hMin, first.x)
+                hMax = max(hMax, last.x)
+            }
+        }
+        
+        return hMin...hMax
+    }
+    
+    static func verticalRange(lines: [ChartLineData], calculatingRange: ClosedRange<CGFloat>? = nil, addBounds: Bool = false) -> ClosedRange<CGFloat>? {
+        if let calculatingRange = calculatingRange {
+            guard let initalStart = lines.first?.points.first(where: { $0.x > calculatingRange.lowerBound &&
+                                                                       $0.x < calculatingRange.upperBound }) else { return nil }
+            var vMin: CGFloat = initalStart.y
+            var vMax: CGFloat = initalStart.y
+            for line in lines {
+                if var index = line.points.firstIndex(where: { $0.x > calculatingRange.lowerBound }) {
+                    if addBounds {
+                        index = max(0, index - 1)
+                    }
+                    while index < line.points.count {
+                        let point = line.points[index]
+                        if point.x < calculatingRange.upperBound {
+                            vMin = min(vMin, point.y)
+                            vMax = max(vMax, point.y)
+                        } else if addBounds {
+                            vMin = min(vMin, point.y)
+                            vMax = max(vMax, point.y)
+                            break
+                        } else {
+                            break
+                        }
+                        index += 1
+                    }
+                }
+            }
+            return vMin...vMax
+        } else {
+            guard let firstPoint = lines.first?.points.first else { return nil }
+            var vMin: CGFloat = firstPoint.y
+            var vMax: CGFloat = firstPoint.y
+            for line in lines {
+                for point in line.points {
+                    vMin = min(vMin, point.y)
+                    vMax = max(vMax, point.y)
+                }
+            }
+            return vMin...vMax
+        }
+    }
+}