Begin statistics creation

CHDataManagement/Workouts/RouteOverview.swift

@@ -17,4 +17,38 @@ struct RouteOverview {
     let start: Date?
 
     let end: Date?
+
+    static func combine(_ overviews: [RouteOverview]) -> RouteOverview {
+        RouteOverview(
+            energy: overviews.reduce(0) { $0 + $1.energy },
+            distance: overviews.reduce(0) { $0 + $1.distance },
+            duration: overviews.reduce(0) { $0 + $1.duration },
+            ascendedElevation: overviews.reduce(0) { $0 + $1.ascendedElevation },
+            start: overviews.compactMap { $0.start }.min(),
+            end: overviews.compactMap { $0.end }.max())
+    }
+
+    var days: Int {
+        guard let start, let end else {
+            return 0
+        }
+        return start.inclusiveDays(to: end)
+    }
+}
+
+extension RouteOverview {
+
+    func update(labels: inout [ContentLabel], language: ContentLanguage) {
+        let locale = language.locale
+        let days = self.days
+
+        if days != 1 {
+            labels.insertOrReplace(icon: .calendar, value: language.text(days: days))
+        } else {
+            labels.insertOrReplace(icon: .statisticsTime, value: duration.duration(locale: locale))
+        }
+        labels.insertOrReplace(icon: .statisticsDistance, value: String(format: "%.1f km", locale: locale, distance / 1000))
+        labels.insertOrReplace(icon: .statisticsElevationUp, value: ascendedElevation.length(roundingToNearest: 50))
+        labels.insertOrReplace(icon: .statisticsEnergy, value: energy.energy(roundingToNearest: 50))
+    }
 }