refactor: decompose frontend state and medication dialog flows

frontend/src/features/schedule/interactions.ts

@@ -0,0 +1,29 @@
+export function toggleDateInSet(previous: Set<string>, dateStr: string): Set<string> {
+	const next = new Set(previous);
+	if (next.has(dateStr)) {
+		next.delete(dateStr);
+	} else {
+		next.add(dateStr);
+	}
+	return next;
+}
+
+export function resolveCollapsedState(
+	isAutoCollapsed: boolean,
+	dateStr: string,
+	manuallyExpandedDays: Set<string>,
+	manuallyCollapsedDays: Set<string>
+): boolean {
+	if (isAutoCollapsed) {
+		return !manuallyExpandedDays.has(dateStr);
+	}
+	return manuallyCollapsedDays.has(dateStr);
+}
+
+export function countTakenDoseIds(doseIds: string[], isDoseTaken: (doseId: string) => boolean): number {
+	return doseIds.filter((id) => isDoseTaken(id)).length;
+}
+
+export function areAllDoseIdsTaken(doseIds: string[], isDoseTaken: (doseId: string) => boolean): boolean {
+	return doseIds.length > 0 && doseIds.every((id) => isDoseTaken(id));
+}