Build Phase 1 application foundation

server/src/app.js

@@ -0,0 +1,81 @@
+const express = require("express");
+const {
+  createDetailedHealthRouter,
+  createHealthRouter,
+} = require("./health/routes");
+const { createSettingsRouter } = require("./settings/routes");
+const { createSettingsService } = require("./settings/service");
+
+function createApp({ config, database, lifecycle, migrations }) {
+  const app = express();
+  const settingsService = createSettingsService(database);
+
+  app.disable("x-powered-by");
+  app.set("trust proxy", config.trustProxy);
+  app.use(express.json({ limit: "1mb" }));
+
+  app.get("/api", (request, response) => {
+    response.json({ name: "Announcements API", version: 2 });
+  });
+  app.use(
+    "/health",
+    createHealthRouter({ database, lifecycle, migrations }),
+  );
+  const detailedHealthRouterOptions = {
+    config,
+    database,
+    lifecycle,
+    migrations,
+  };
+  app.use(
+    "/api/health",
+    createDetailedHealthRouter(detailedHealthRouterOptions),
+  );
+  app.use(
+    "/api/status",
+    createDetailedHealthRouter(detailedHealthRouterOptions),
+  );
+  app.use("/api/settings", createSettingsRouter(settingsService));
+
+  app.use((request, response) => {
+    response.status(404).json({
+      error: {
+        code: "NOT_FOUND",
+        message: "Route not found",
+      },
+    });
+  });
+
+  app.use((error, request, response, next) => {
+    if (response.headersSent) {
+      next(error);
+      return;
+    }
+
+    if (error instanceof SyntaxError && error.status === 400 && "body" in error) {
+      response.status(400).json({
+        error: {
+          code: "INVALID_JSON",
+          message: "Request body must contain valid JSON",
+        },
+      });
+      return;
+    }
+
+    const statusCode = error.statusCode || 500;
+    response.status(statusCode).json({
+      error: {
+        code: error.code || "INTERNAL_ERROR",
+        message:
+          statusCode >= 500 ? "An internal server error occurred" : error.message,
+        ...(error.details ? { details: error.details } : {}),
+      },
+    });
+  });
+
+  return app;
+}
+
+module.exports = {
+  createApp,
+};