fun CourseDetails()

in Owl/app/src/main/java/com/example/owl/ui/course/CourseDetails.kt [117:170]
50 lines of code
2 McCabe index (conditional complexity)

fun CourseDetails(
    course: Course,
    selectCourse: (Long) -> Unit,
    upPress: () -> Unit
) {
    PinkTheme {
        BoxWithConstraints {
            val sheetState = rememberSwipeableState(SheetState.Closed)
            val fabSize = with(LocalDensity.current) { FabSize.toPx() }
            val dragRange = constraints.maxHeight - fabSize
            val scope = rememberCoroutineScope()

            BackHandler(
                enabled = sheetState.currentValue == SheetState.Open,
                onBack = {
                    scope.launch {
                        sheetState.animateTo(SheetState.Closed)
                    }
                }
            )

            Box(
                // The Lessons sheet is initially closed and appears as a FAB. Make it openable by
                // swiping or clicking the FAB.
                Modifier.swipeable(
                    state = sheetState,
                    anchors = mapOf(
                        0f to SheetState.Closed,
                        -dragRange to SheetState.Open
                    ),
                    thresholds = { _, _ -> FractionalThreshold(0.5f) },
                    orientation = Vertical
                )
            ) {
                val openFraction = if (sheetState.offset.value.isNaN()) {
                    0f
                } else {
                    -sheetState.offset.value / dragRange
                }.coerceIn(0f, 1f)
                CourseDescription(course, selectCourse, upPress)
                LessonsSheet(
                    course,
                    openFraction,
                    this@BoxWithConstraints.constraints.maxWidth.toFloat(),
                    this@BoxWithConstraints.constraints.maxHeight.toFloat()
                ) { state ->
                    scope.launch {
                        sheetState.animateTo(state)
                    }
                }
            }
        }
    }
}