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export interface CachedStopList {
timestamp: number;
data: Stop[];
}
export interface Stop {
stopId: number
name: string;
latitude?: number;
longitude?: number;
lines: string[];
favourite?: boolean;
}
export class StopDataProvider {
async getStops(): Promise<Stop[]> {
const rawFavouriteStops = localStorage.getItem('favouriteStops');
let favouriteStops: number[] = [];
if (rawFavouriteStops) {
favouriteStops = JSON.parse(rawFavouriteStops) as number[];
}
const response = await fetch('/api/GetStopList');
const stops = await response.json() as Stop[];
return stops.map((stop: Stop) => {
return {
...stop,
favourite: favouriteStops.includes(stop.stopId)
};
});
}
addFavourite(stopId: number) {
const rawFavouriteStops = localStorage.getItem('favouriteStops');
let favouriteStops: number[] = [];
if (rawFavouriteStops) {
favouriteStops = JSON.parse(rawFavouriteStops) as number[];
}
if (!favouriteStops.includes(stopId)) {
favouriteStops.push(stopId);
localStorage.setItem('favouriteStops', JSON.stringify(favouriteStops));
}
}
removeFavourite(stopId: number) {
const rawFavouriteStops = localStorage.getItem('favouriteStops');
let favouriteStops: number[] = [];
if (rawFavouriteStops) {
favouriteStops = JSON.parse(rawFavouriteStops) as number[];
}
const newFavouriteStops = favouriteStops.filter(id => id !== stopId);
localStorage.setItem('favouriteStops', JSON.stringify(newFavouriteStops));
}
isFavourite(stopId: number): boolean {
const rawFavouriteStops = localStorage.getItem('favouriteStops');
if (rawFavouriteStops) {
const favouriteStops = JSON.parse(rawFavouriteStops) as number[];
return favouriteStops.includes(stopId);
}
return false;
}
RECENT_STOPS_LIMIT = 10;
pushRecent(stopId: number) {
const rawRecentStops = localStorage.getItem('recentStops');
let recentStops: Set<number> = new Set();
if (rawRecentStops) {
recentStops = new Set(JSON.parse(rawRecentStops) as number[]);
}
recentStops.add(stopId);
if (recentStops.size > this.RECENT_STOPS_LIMIT) {
const iterator = recentStops.values();
const val = iterator.next().value as number;
recentStops.delete(val);
}
localStorage.setItem('recentStops', JSON.stringify(Array.from(recentStops)));
}
getRecent(): number[] {
const rawRecentStops = localStorage.getItem('recentStops');
if (rawRecentStops) {
return JSON.parse(rawRecentStops) as number[];
}
return [];
}
}
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