README.md

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 # Project
 
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+67

app.js

@@ -1 +1,22 @@
-//builds
+import express from "express";
+import cors from "cors";
+import vehiclesRouter from "./src/routes/vehicles.js";
+import routesRouter from "./src/routes/routes.js";
+
+const app = express();
+app.use(cors());
+app.use(express.json());
+
+const base = "/api/v0";
+
+app.get(`${base}/`, (req, res) => {
+  res.json({status: "ok", version: "v0", ts: new Date().toISOString()});
+});
+
+app.use(`${base}/vehicles`, vehiclesRouter);
+
+app.use(base, routesRouter);
+
+app.get("/", (req, res) => res.redirect(`${base}/`));
+
+export default app;

package-lock.json

@@ -9,6 +9,7 @@
       "version": "1.0.0",
       "license": "ISC",
       "dependencies": {
+        "cors": "^2.8.5",
         "express": "^5.1.0"
       }
     },
@@ -123,6 +124,19 @@
         "node": ">=6.6.0"
       }
     },
+    "node_modules/cors": {
+      "version": "2.8.5",
+      "resolved": "https://registry.npmjs.org/cors/-/cors-2.8.5.tgz",
+      "integrity": "sha512-KIHbLJqu73RGr/hnbrO9uBeixNGuvSQjul/jdFvS/KFSIH1hWVd1ng7zOHx+YrEfInLG7q4n6GHQ9cDtxv/P6g==",
+      "license": "MIT",
+      "dependencies": {
+        "object-assign": "^4",
+        "vary": "^1"
+      },
+      "engines": {
+        "node": ">= 0.10"
+      }
+    },
     "node_modules/debug": {
       "version": "4.4.3",
       "resolved": "https://registry.npmjs.org/debug/-/debug-4.4.3.tgz",
@@ -506,6 +520,15 @@
         "node": ">= 0.6"
       }
     },
+    "node_modules/object-assign": {
+      "version": "4.1.1",
+      "resolved": "https://registry.npmjs.org/object-assign/-/object-assign-4.1.1.tgz",
+      "integrity": "sha512-rJgTQnkUnH1sFw8yT6VSU3zD3sWmu6sZhIseY8VX+GRu3P6F7Fu+JNDoXfklElbLJSnc3FUQHVe4cU5hj+BcUg==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
     "node_modules/object-inspect": {
       "version": "1.13.4",
       "resolved": "https://registry.npmjs.org/object-inspect/-/object-inspect-1.13.4.tgz",

package.json

@@ -14,8 +14,9 @@
   "keywords": [],
   "author": "",
   "license": "ISC",
-  "type": "commonjs",
+  "type": "module",
   "dependencies": {
+    "cors": "^2.8.5",
     "express": "^5.1.0"
   }
 }

src/dal/data/routes.json

@@ -3,6 +3,5 @@
     "route_id": "701",
     "start_location": "Draper City Center",
     "end_location": "Salt Lake Central"
-
   }
 ]

src/dal/staticDal.js

@@ -1,8 +1,106 @@
+import fs from "fs";
+import path from "path";
 
-vehicleData=require('./data/vehicles.json');
+const dataDir = path.join(process.cwd(), "src", "dal", "data");
 
-exports.DAL={
+function readJSON(name) {
-  getVehicles:function() {
+  try {
-    return vehicleData; 
+    const p = path.join(dataDir, name);
-  },
+    if (!fs.existsSync(p)) return null;
-};
+    const raw = fs.readFileSync(p, "utf8");
+    return JSON.parse(raw);
+  } catch (err) {
+    return null;
+  }
+}
+
+export function getVehicles() {
+  return readJSON("vehicles.json") || [];
+}
+
+export function getVehicleById(id) {
+  if (id == null) return null;
+  const vehicles = getVehicles();
+  
+  return vehicles.find(v => String(v.vehicleId) === String(id)) || null;
+}
+
+export function getRoutes() {
+  const explicit = readJSON("routes.json");
+  if (Array.isArray(explicit) && explicit.length) return explicit;
+
+  const vehicles = getVehicles();
+  const map = new Map();
+  vehicles.forEach(v => {
+    const key = String(v.routeNum ?? "");
+    if (!map.has(key)) {
+      map.set(key, {
+        routeId: key,
+        routeName: v.routeName ?? null,
+        startTime: null,
+        endTime: null,
+        trains: []
+      });
+    }
+
+    map.get(key).trains.push(v.vehicleId);
+
+  });
+
+  return Array.from(map.values());
+}
+
+export function getRouteById(routeId) {
+  if (routeId == null) return null;
+  const routes = getRoutes();
+
+  return routes.find(r => String(r.routeId) === String(routeId)) || null;
+}
+
+export function getRoutePathsMap() {
+  const raw = readJSON("routepaths.json");
+
+  return raw && typeof raw === "object" && !Array.isArray(raw) ? raw : {};
+}
+
+export function getRoutePath(routeId) {
+  if (routeId == null) return null;
+  const map = getRoutePathsMap();
+  const keys = Object.keys(map || {});
+  const foundKey = keys.find(k => String(k) === String(routeId));
+
+  return foundKey ? map[foundKey] : null;
+}
+
+export function getStations() {
+  return readJSON("stations.json") || [];
+}
+
+export function getStopsByRoute(routeId) {
+  if (routeId == null) return [];
+  const stations = getStations();
+
+  if (!Array.isArray(stations)) return [];
+  return stations.filter(s => {
+    const lines = s.lines ?? s.lines_arr ?? s.line_ids ?? null;
+    if (!Array.isArray(lines)) return false;
+
+    return lines.map(String).includes(String(routeId));
+  });
+
+}
+
+export function getStationById(stationId) {
+  if (stationId == null) return null;
+  const stations = getStations();
+
+  if (!Array.isArray(stations)) return null;
+  return stations.find(s => {
+    if (s.stop_id && String(s.stop_id) === String(stationId)) return true;
+    if (s.stationId && String(s.stationId) === String(stationId)) return true;
+    if (s.id && String(s.id) === String(stationId)) return true;
+
+    return false;
+  }) || null;
+
+}

src/routes/routes.js

@@ -1,3 +1,52 @@
-// - /api/v0/routes
+import express from "express";
-// - /api/v0/route/:id
+import * as dal from "../dal/staticDal.js";
-// - /api/v0/stops/:id
+
+const router = express.Router();
+
+router.get("/routes", (req, res) => {
+  const routes = dal.getRoutes();
+  
+  res.json({meta: {returned: routes.length}, data: routes});
+});
+
+router.get("/routes/:routeId", (req, res) => {
+  const routeId = req.params.routeId;
+  let route = dal.getRouteById(routeId) ?? null;
+
+  if (route === null) {
+    const all = dal.getRoutes();
+    route = all.find(r => {
+      const rid = r.route_id ?? r.routeId ?? r.route;
+      return rid != null && String(rid) === String(routeId);
+    }) ?? null;
+  }
+
+  const routePath = dal.getRoutePath(routeId) ?? null;
+  let stations = dal.getStopsByRoute(routeId) ?? [];
+
+  res.json({data: {route, routePath, stations}});
+});
+
+router.get("/routes/:routeId/stations", (req, res) => {
+  const routeId = req.params.routeId;
+  const stations = dal.getStopsByRoute(routeId) ?? [];
+
+  res.json({meta: {routeId: String(routeId), returned: stations.length}, data: stations});
+});
+
+router.get("/stations", (req, res) => {
+  const route = req.query.route;
+  const stations = route ? (dal.getStopsByRoute(route) ?? []) : (dal.getStations() ?? []);
+
+  res.json({meta: {returned: stations.length}, data: stations});
+});
+
+router.get("/station/:stationId", (req, res) => {
+  const stationId = req.params.stationId;
+  const station = dal.getStationById(stationId);
+  if (!station) return res.status(404).json({error: "Station Was Not Found"});
+
+  res.json({data: station});
+});
+
+export default router;

src/routes/vehicles.js

@@ -1 +1,48 @@
-// - /api/v0/vehicles/:id
+import express from "express";
+import * as dal from "../dal/staticDal.js";
+
+const router = express.Router();
+
+router.get("/", (req, res) => {
+  let vehicles = dal.getVehicles();
+
+  const {routeNum, routeName, destination, minLat, maxLat, minLng, maxLng, limit} = req.query;
+
+  if (routeNum) vehicles = vehicles.filter(v => String(v.routeNum) === String(routeNum));
+  if (routeName) vehicles = vehicles.filter(v => v.routeName && v.routeName.toLowerCase().includes(String(routeName).toLowerCase()));
+  if (destination) vehicles = vehicles.filter(v => v.destination && v.destination.toLowerCase().includes(String(destination).toLowerCase()));
+
+  if (minLat || maxLat || minLng || maxLng) {
+    const minLatN = parseFloat(minLat ?? -90);
+    const maxLatN = parseFloat(maxLat ?? 90);
+    const minLngN = parseFloat(minLng ?? -180);
+    const maxLngN = parseFloat(maxLng ?? 180);
+
+    vehicles = vehicles.filter(v => {
+      const lat = parseFloat(v.location?.latitude);
+      const lng = parseFloat(v.location?.longitude);
+
+      return lat >= minLatN && lat <= maxLatN && lng >= minLngN && lng <= maxLngN;
+    });
+
+  }
+
+  let returned = vehicles.length;
+  if (limit) {
+    const lim = Math.max(1, Math.min(1000, parseInt(limit, 10) || 100));
+
+    vehicles = vehicles.slice(0, lim);
+    returned = vehicles.length;
+  }
+
+  res.json({meta: {returned}, data: vehicles});
+});
+
+router.get("/:id", (req, res) => {
+  const v = dal.getVehicleById(req.params.id);
+  if (!v) return res.status(404).json({error: "Vehicle Was Not Found"});
+  
+  res.json({data: v});
+});
+
+export default router;

start.js

@@ -1,15 +1,7 @@
 //Starts
-const express = require('express')
+import app from "./app.js";
-const { DAL } = require('./src/dal/staticDal')
-const app = express()
-const port = 3000
-
-app.get('/', (req, res) => {
-  res.json(DAL.getVehicles())
-
-})
-
-app.listen(port, () => {
-  console.log(`Example app listening on port ${port}`)
-})
 
+const PORT = process.env.PORT || 3000;
+app.listen(PORT, () => {
+  console.log(`Transit API http://localhost:${PORT}`);
+});