restructure parking and shuttle repository loaders

src/loaders/parking/ChapmanApiBasedParkingRepositoryLoader.ts

@@ -0,0 +1,83 @@
+import { ParkingRepositoryLoader } from "./ParkingRepositoryLoader";
+import { ParkingGetterSetterRepository } from "../../repositories/ParkingGetterSetterRepository";
+import { createHash } from "node:crypto";
+import { ApiResponseError } from "../ApiResponseError";
+import { IParkingStructure } from "../../entities/ParkingRepositoryEntities";
+
+class ApiParseError extends Error {
+  constructor(message: string) {
+    super(message);
+    this.name = "ApiParseError";
+  }
+}
+
+export class ChapmanApiBasedParkingRepositoryLoader implements ParkingRepositoryLoader {
+  public static readonly id = "chapman-parking-loader";
+  private readonly fetchUrl = "https://webfarm.chapman.edu/ParkingService/ParkingService/counts";
+
+  constructor(
+    public repository: ParkingGetterSetterRepository
+  ) {
+    this.fetchAndUpdateParkingStructures = this.fetchAndUpdateParkingStructures.bind(this);
+  }
+
+  async fetchAndUpdateAll() {
+    await this.fetchAndUpdateParkingStructures();
+  }
+
+  async fetchAndUpdateParkingStructures(): Promise<void> {
+    let json: any;
+
+    try {
+      const response = await fetch(this.fetchUrl);
+      json = await response.json();
+    } catch(e: any) {
+      throw new ApiResponseError(e.message);
+    }
+
+    try {
+      if (typeof json.Structures === "object") {
+        const parkingStructures: IParkingStructure[] = json.Structures.map(this.constructIParkingStructureFromJson);
+
+        await Promise.all(parkingStructures.map(async (structure: IParkingStructure) => {
+          await this.repository.addOrUpdateParkingStructure(structure);
+        }));
+      }
+    } catch(e: any) {
+      throw new ApiParseError(e.message);
+    }
+  }
+
+  private constructIParkingStructureFromJson(jsonStructure: any) {
+    const structureToReturn: IParkingStructure = {
+      capacity: jsonStructure.Capacity,
+      coordinates: {
+        latitude: jsonStructure.Latitude,
+        longitude: jsonStructure.Longitude,
+      },
+      id: ChapmanApiBasedParkingRepositoryLoader.generateId(jsonStructure.Address),
+      name: jsonStructure.Name,
+      spotsAvailable: jsonStructure.CurrentCount,
+      address: jsonStructure.Address
+    }
+
+    return structureToReturn;
+  }
+
+  private static normalizeAddress(address: string): string {
+    return address
+      .toLowerCase()
+      .split(/\s+/)
+      .filter(part => part.length > 0)
+      .join(' ');
+  }
+
+  public static generateId(address: string): string {
+    const normalized = this.normalizeAddress(address);
+    const hash = createHash('sha256')
+      .update(normalized)
+      .digest('hex');
+
+    return hash.substring(0, 32);
+  }
+}

src/loaders/parking/ParkingRepositoryLoader.ts

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+import { RepositoryLoader } from "../RepositoryLoader";
+
+export interface ParkingRepositoryLoader extends RepositoryLoader {
+  fetchAndUpdateParkingStructures(): Promise<void>;
+}

src/loaders/parking/buildParkingRepositoryLoaderIfExists.ts

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+import { ParkingGetterSetterRepository } from "../../repositories/ParkingGetterSetterRepository";
+import { ChapmanApiBasedParkingRepositoryLoader } from "./ChapmanApiBasedParkingRepositoryLoader";
+
+interface ParkingRepositoryBuilderArguments {
+  id: string;
+  repository: ParkingGetterSetterRepository;
+}
+
+export function buildParkingRepositoryLoaderIfExists(args: ParkingRepositoryBuilderArguments) {
+  if (args.id === ChapmanApiBasedParkingRepositoryLoader.id) {
+    return new ChapmanApiBasedParkingRepositoryLoader(args.repository);
+  }
+
+  return null;
+}