1 files changed, 65 insertions, 0 deletions
diff --git a/src/data/StopDataProvider.ts b/src/data/StopDataProvider.ts
new file mode 100644
index 0000000..620a659
--- /dev/null
+++ b/src/data/StopDataProvider.ts
@@ -0,0 +1,65 @@
+import stops from './stops.json';
+
+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[];
+		}
+
+		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;
+	}
+}
+\ No newline at end of file