lab 05

labs/05/server2/server.js

@@ -0,0 +1,67 @@
+import { ApiServer } from "./modules/ApiServer.js";
+import { Database } from "./modules/Database.js";
+import { PatientRepository } from "./modules/PatientRepository.js";
+import { MESSAGES } from "./lang/messages/en/user.js";
+
+const DEFAULT_PORT = 8080;
+
+class Config {
+  constructor(env) {
+    this.port     = Number(env.PORT) || DEFAULT_PORT;
+    this.host     = env.DB_HOST;
+    this.dbPort   = Number(env.DB_PORT) || 3306;
+    this.database = env.DB_NAME;
+
+    this.readerUser     = env.DB_READER_USER;
+    this.readerPassword = env.DB_READER_PASSWORD;
+    this.writerUser     = env.DB_WRITER_USER;
+    this.writerPassword = env.DB_WRITER_PASSWORD;
+
+    // most hosted databases require tls, a local container does not
+    this.ssl = env.DB_SSL === "true" ? { rejectUnauthorized: true } : undefined;
+  }
+
+  isComplete() {
+    return Boolean(
+      this.host
+      && this.database
+      && this.readerUser
+      && this.readerPassword
+      && this.writerUser
+      && this.writerPassword
+    );
+  }
+
+  toDatabaseConfig() {
+    return {
+      host:           this.host,
+      port:           this.dbPort,
+      database:       this.database,
+      readerUser:     this.readerUser,
+      readerPassword: this.readerPassword,
+      writerUser:     this.writerUser,
+      writerPassword: this.writerPassword,
+      ssl:            this.ssl,
+    };
+  }
+}
+
+const config = new Config(process.env);
+
+if (!config.isComplete()) {
+  console.error(MESSAGES.MISSING_CONFIG);
+  process.exit(1);
+}
+
+const database = new Database(config.toDatabaseConfig());
+const patients = new PatientRepository(database);
+const api      = new ApiServer(config.port, patients);
+
+api.start();
+
+try {
+  const users = await database.testConnections();
+  console.log(MESSAGES.CONNECTED + `${users.reader} / ${users.writer}`);
+} catch (error) {
+  console.error(MESSAGES.CONNECTION_FAILED + error.message);
+}