Add: first working version

src/app/energy-price.service.ts

@@ -0,0 +1,32 @@
+import { Injectable, inject } from '@angular/core';
+import { HttpClient } from '@angular/common/http';
+import { Observable } from 'rxjs';
+
+export interface EnergyPrice {
+  SEK_per_kWh: number;
+  EUR_per_kWh: number;
+  EXR: number;
+  time_start: string;
+  time_end: string;
+}
+
+@Injectable({
+  providedIn: 'root'
+})
+export class EnergyPriceService {
+  private apiBaseUrl = 'https://www.elprisetjustnu.se/api/v1/prices';
+  private http = inject(HttpClient);
+
+  getPrices(year: string, month: string, day: string, priceClass: string): Observable<EnergyPrice[]> {
+    const url = `${this.apiBaseUrl}/${year}/${month}-${day}_${priceClass}.json`;
+    return this.http.get<EnergyPrice[]>(url);
+  }
+
+  formatDate(date: Date): { year: string, month: string, day: string } {
+    const year = date.getFullYear().toString();
+    const month = (date.getMonth() + 1).toString().padStart(2, '0');
+    const day = date.getDate().toString().padStart(2, '0');
+
+    return { year, month, day };
+  }
+}