feat: add structured pino logging and validated log-level config

src/server.js

@@ -4,6 +4,7 @@ const http = require("node:http");
 const { buildApp } = require("./app");
 const { config } = require("./config");
 const { JsonFileStateStore } = require("./lib/state-store");
+const { createLogger } = require("./lib/logger");
 
 function readBody(req) {
   return new Promise((resolve, reject) => {
@@ -68,7 +69,7 @@ function createMutationPersister({ stateStore, logger = console }) {
       queue = queue
         .then(() => stateStore.save(state))
         .catch((error) => {
-          logger.error("failed to persist state", error);
+          logger.error({ err: error }, "failed to persist state");
         });
 
       return queue;
@@ -87,6 +88,7 @@ async function createRuntime({ runtimeConfig = config, logger = console } = {})
   const app = buildApp({
     config: runtimeConfig,
     initialState,
+    logger,
     onMutation(state) {
       void persister.enqueue(state);
     },
@@ -102,7 +104,11 @@ async function createRuntime({ runtimeConfig = config, logger = console } = {})
 }
 
 async function start() {
-  const runtime = await createRuntime({ runtimeConfig: config });
+  const logger = createLogger({
+    level: config.logLevel,
+    name: "xartaudio",
+  });
+  const runtime = await createRuntime({ runtimeConfig: config, logger });
   const { server, persister } = runtime;
 
   let shuttingDown = false;
@@ -112,7 +118,7 @@ async function start() {
     }
 
     shuttingDown = true;
-    console.log(`received ${signal}, shutting down`);
+    logger.info({ signal }, "received shutdown signal");
 
     server.close();
     await persister.flush();
@@ -126,13 +132,17 @@ async function start() {
   });
 
   server.listen(config.port, () => {
-    console.log(`xartaudio server listening on :${config.port}`);
+    logger.info({ port: config.port }, "xartaudio server listening");
   });
 }
 
 if (require.main === module) {
   start().catch((error) => {
-    console.error("failed to start server", error);
+    const logger = createLogger({
+      level: config.logLevel,
+      name: "xartaudio",
+    });
+    logger.error({ err: error }, "failed to start server");
     process.exitCode = 1;
   });
 }