SwiftUI - Merge two different Paths into one OR change strokeStyle mid-drawing - swiftui

Question

I have a vertical list of points that are connected with lines. Up to the so-called "active point", the lines should be solid and from the active point on dotted (metaphor for what the user already finished and what is still coming).
Here is how it looks on Android:
It is one long path in the end, it just changes style in the middle. How can I combine these two into one?
I was imagining something like this:
func drawPaths(points: [CGPoint]) -> some Shape {
let activeChlgIndex = (chlgViewModel.activeChallenge?.id ?? -1)
var wholePath: Path
// Before active challenge
var solidPath = Path { path in
path.move(to: points[0])
for (i, _) in points.enumerated() {
if (i <= activeChlgIndex) {
path.addLine(to: points[i])
}
}
}
.stroke(lineWidth: 2)
.foregroundColor(.pathColorSolid)
// After active challenge
var dottedPath = Path { path in
path.move(to: points[activeChlgIndex])
for (i, _) in points.enumerated() {
if (i >= activeChlgIndex) {
path.addLine(to: points[i])
}
}
}
.stroke(style: StrokeStyle(lineWidth: 2, dash: [5]))
.foregroundColor(.pathColorDotted)
wholePath = solidPath.addPath(dottedPath)
return wholePath
}

Answer 1

In the end making them two separate paths was the easiest solution.
Color can only applied after the return of the function in body, because otherwise it's some ColoredView<XYZ> or so and cannot be returned as any Shape
var body: some View {
ScrollView {
GeometryReader { geometry in
let points = calculatePoints(geometry: geometry)
let activeChlgIndex = (chlgViewModel.activeChallenge?.id ?? -1) - 1
drawSolidPaths(points: points, activeChlgIndex: activeChlgIndex)
.foregroundColor(.pathColorSolid)
drawDottedPaths(points: points, activeChlgIndex: activeChlgIndex)
.foregroundColor(.pathColorDotted)
drawCircles(geometry: geometry, points: points, activeChlgIndex: activeChlgIndex)
}
}
}
func drawSolidPaths(points: [CGPoint], activeChlgIndex: Int) -> some Shape {
let pointsUpToActiveChlg = Array(points[0 ... activeChlgIndex])
return Path { path in
path.move(to: pointsUpToActiveChlg[0])
for (i, _) in pointsUpToActiveChlg.enumerated() {
path.addLine(to: pointsUpToActiveChlg[i])
}
}
.stroke(lineWidth: 2)
}
func drawDottedPaths(points: [CGPoint], activeChlgIndex: Int) -> some Shape {
let pointsFromActiveChlg = Array(points[activeChlgIndex ..< points.count])
return Path { path in
path.move(to: pointsFromActiveChlg[0])
for (i, _) in pointsFromActiveChlg.enumerated() {
path.addLine(to: pointsFromActiveChlg[i])
}
}
.stroke(style: StrokeStyle(lineWidth: 2, dash: [5]))
}