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import {
createContext,
useCallback,
useContext,
useRef,
useState,
type ReactNode,
} from "react";
export interface ActiveJourney {
tripId: string;
stopId: string;
stopName: string;
routeShortName: string;
routeColour: string;
routeTextColour: string;
headsignDestination: string | null;
/** Minutes remaining when tracking was started (for display context) */
initialMinutes: number;
/** Send notification when this many minutes remain (default: 2) */
notifyAtMinutes: number;
/** Whether the "approaching" notification has already been sent */
hasNotified: boolean;
}
interface JourneyContextValue {
activeJourney: ActiveJourney | null;
startJourney: (
journey: Omit<ActiveJourney, "hasNotified">
) => void;
stopJourney: () => void;
markNotified: () => void;
}
const JourneyContext = createContext<JourneyContextValue | null>(null);
export function JourneyProvider({ children }: { children: ReactNode }) {
const [activeJourney, setActiveJourney] = useState<ActiveJourney | null>(
null
);
const notificationRef = useRef<Notification | null>(null);
const startJourney = useCallback(
(journey: Omit<ActiveJourney, "hasNotified">) => {
// Close any existing notification
if (notificationRef.current) {
notificationRef.current.close();
notificationRef.current = null;
}
setActiveJourney({ ...journey, hasNotified: false });
},
[]
);
const stopJourney = useCallback(() => {
if (notificationRef.current) {
notificationRef.current.close();
notificationRef.current = null;
}
setActiveJourney(null);
}, []);
const markNotified = useCallback(() => {
setActiveJourney((prev) =>
prev ? { ...prev, hasNotified: true } : null
);
}, []);
return (
<JourneyContext.Provider
value={{ activeJourney, startJourney, stopJourney, markNotified }}
>
{children}
</JourneyContext.Provider>
);
}
export function useJourney() {
const ctx = useContext(JourneyContext);
if (!ctx) {
throw new Error("useJourney must be used within a JourneyProvider");
}
return ctx;
}
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