Moved the NodeJS version of the application to the app/ directory.

app/backend/src/server.ts

@@ -0,0 +1,195 @@
+import { existsSync } from "node:fs";
+import { join } from "node:path";
+import cors from "cors";
+import express from "express";
+import { z } from "zod";
+import { AzureImageService } from "./azure-service";
+import { TemplateService } from "./template-service";
+
+const findAppNewRoot = (): string => {
+  const candidates = [join(__dirname, "../../.."), join(__dirname, "../..")];
+
+  for (const candidate of candidates) {
+    if (existsSync(join(candidate, "templates.json"))) {
+      return candidate;
+    }
+  }
+
+  throw new Error("Unable to resolve app-new root");
+};
+
+const queryLocation = z.object({ location: z.string().min(1) });
+const queryOffer = z.object({ location: z.string().min(1), publisher: z.string().min(1) });
+const querySku = z.object({ location: z.string().min(1), publisher: z.string().min(1), offer: z.string().min(1) });
+const queryVersion = z.object({ location: z.string().min(1), publisher: z.string().min(1), offer: z.string().min(1), sku: z.string().min(1) });
+
+const renderBody = z.object({
+  templateFile: z.string().min(1),
+  selection: z.object({
+    location: z.string().min(1),
+    publisher: z.string().min(1),
+    offer: z.string().min(1),
+    sku: z.string().min(1),
+    version: z.string().min(1)
+  })
+});
+
+const makeApp = () => {
+  const app = express();
+  const port = Number.parseInt(process.env.PORT ?? "3000", 10);
+  const subscriptionId = process.env.AZURE_SUBSCRIPTION_ID;
+
+  app.use(cors());
+  app.use(express.json());
+
+  const azure = subscriptionId ? new AzureImageService(subscriptionId) : null;
+  const templates = new TemplateService();
+
+  app.get("/api/health", (_req, res) => {
+    if (!subscriptionId) {
+      res.status(500).json({
+        status: "error",
+        message: "Missing AZURE_SUBSCRIPTION_ID"
+      });
+      return;
+    }
+
+    res.json({ status: "ok" });
+  });
+
+  const requireAzure = (): AzureImageService => {
+    if (!azure) {
+      throw new Error("Missing AZURE_SUBSCRIPTION_ID");
+    }
+
+    return azure;
+  };
+
+  app.get("/api/locations", async (_req, res, next) => {
+    try {
+      res.json(await requireAzure().getLocations());
+    } catch (error) {
+      next(error);
+    }
+  });
+
+  app.get("/api/publishers", async (req, res, next) => {
+    try {
+      const { location } = queryLocation.parse(req.query);
+      res.json(await requireAzure().getPublishers(location));
+    } catch (error) {
+      next(error);
+    }
+  });
+
+  app.get("/api/offers", async (req, res, next) => {
+    try {
+      const { location, publisher } = queryOffer.parse(req.query);
+      res.json(await requireAzure().getOffers(location, publisher));
+    } catch (error) {
+      next(error);
+    }
+  });
+
+  app.get("/api/skus", async (req, res, next) => {
+    try {
+      const { location, publisher, offer } = querySku.parse(req.query);
+      res.json(await requireAzure().getSkus(location, publisher, offer));
+    } catch (error) {
+      next(error);
+    }
+  });
+
+  app.get("/api/versions", async (req, res, next) => {
+    try {
+      const { location, publisher, offer, sku } = queryVersion.parse(req.query);
+      res.json(await requireAzure().getVersions(location, publisher, offer, sku));
+    } catch (error) {
+      next(error);
+    }
+  });
+
+  app.get("/api/templates", (_req, res) => {
+    res.json(templates.getTemplates());
+  });
+
+  app.post("/api/render", (req, res, next) => {
+    try {
+      const payload = renderBody.parse(req.body);
+      const rendered = templates.render(payload.templateFile, payload.selection);
+      res.json({ rendered });
+    } catch (error) {
+      next(error);
+    }
+  });
+
+  app.get("/api/sku-export", async (req, res, next) => {
+    try {
+      const { location, publisher, offer } = querySku.parse(req.query);
+      const skus = await requireAzure().getSkus(location, publisher, offer);
+      res.json({ rendered: templates.buildSkuExport(skus) });
+    } catch (error) {
+      next(error);
+    }
+  });
+
+  app.use((err: unknown, _req: express.Request, res: express.Response, _next: express.NextFunction) => {
+    if (err instanceof z.ZodError) {
+      res.status(400).json({ message: "Invalid request", issues: err.issues });
+      return;
+    }
+
+    const message = err instanceof Error ? err.message : "Unexpected error";
+    res.status(500).json({ message });
+  });
+
+  const frontendRoot = join(findAppNewRoot(), "dist/frontend");
+  if (existsSync(frontendRoot)) {
+    app.use(express.static(frontendRoot));
+    app.get(/^(?!\/api).*/, (_req, res) => {
+      res.sendFile(join(frontendRoot, "index.html"));
+    });
+  }
+
+  return { app, port };
+};
+
+if (require.main === module) {
+  const { app, port } = makeApp();
+  const server = app.listen(port, () => {
+    // eslint-disable-next-line no-console
+    console.log(`azure-image-chooser listening on ${port}`);
+  });
+
+  let shuttingDown = false;
+  const shutdown = (signal: NodeJS.Signals) => {
+    if (shuttingDown) {
+      return;
+    }
+
+    shuttingDown = true;
+    // eslint-disable-next-line no-console
+    console.log(`received ${signal}, shutting down`);
+    server.close((error) => {
+      if (error) {
+        // eslint-disable-next-line no-console
+        console.error("graceful shutdown failed", error);
+        process.exit(1);
+      }
+
+      process.exit(0);
+    });
+
+    // Force-exit if connections do not close in time.
+    setTimeout(() => {
+      // eslint-disable-next-line no-console
+      console.error("shutdown timeout reached, forcing exit");
+      process.exit(1);
+    }, 10_000).unref();
+  };
+
+  process.on("SIGTERM", shutdown);
+  process.on("SIGINT", shutdown);
+}
+
+export { makeApp };