Issue/120 configurable log levels (#127)

* Log level is now configurable globally

* Read log configuration from Environment Variables

* Added comments and fixed indentation.

* Minor cleanup in nestjs.ts

* Removed unused code and fixed config.

Co-authored-by: nlg <[email protected]>

Author: GufCab

src/config/configuration.ts

@@ -1,3 +1,5 @@
+import { GetLogLevels } from "@helpers/env-variable-helper";
+
 export default (): any => {
     return {
         port: parseInt(process.env.PORT, 10) || 3000,
@@ -28,5 +30,6 @@ export default (): any => {
         chirpstack: {
             jwtsecret: process.env.CHIRPSTACK_JWTSECRET || "verysecret",
         },
+        logLevels: process.env.LOG_LEVEL ? GetLogLevels(process.env.LOG_LEVEL) : GetLogLevels('debug')
     };
 };

src/helpers/env-variable-helper.ts

@@ -0,0 +1,20 @@
+import { LogLevel } from '@nestjs/common';
+
+const logLevels: LogLevel[] = ['log', 'error', 'warn', 'debug', 'verbose'];
+
+// Gets a list of log levels equal to, or higher, than the supplied minimum level
+export function GetLogLevels(minLevel: string): LogLevel[] {
+    // If nothing was supplied, use default values
+    if (!minLevel) {
+        return undefined;
+    }
+
+    const logIndex = logLevels.indexOf(minLevel as LogLevel);
+    if (logIndex < 0) {
+        throw new Error(`Invalid log level: "${minLevel}" supplied in environment`);
+    }
+
+    // We want to return all the HIGHER log levels and they are ranked high->low
+    const higherLevels = logLevels.slice(0, logIndex + 1);
+    return higherLevels;
+}

src/loaders/nestjs.ts

@@ -3,25 +3,27 @@ import {
     INestApplication,
     ValidationPipe,
     Logger as BuiltInLogger,
+    LogLevel,
 } from "@nestjs/common";
-import { Logger } from "nestjs-pino";
 import { NestFactory } from "@nestjs/core";
 import * as compression from "compression";
 import { AppModule } from "@modules/app.module";
 import { ExpressAdapter } from "@nestjs/platform-express/adapters/express-adapter";
 import * as cookieParser from "cookie-parser";
 import { Express } from "express";
 
+
 export async function setupNestJs(
     config: {
         NEST_PORT: number;
         API_PREFIX: string;
         CURRENT_VERSION_PREFIX: string;
         SWAGGER_PREFIX: string;
+        LOG_LEVELS: LogLevel[];
     },
     server: Express
 ): Promise<INestApplication> {
-    const app = await NestFactory.create(AppModule, new ExpressAdapter(server));
+    const app = await NestFactory.create(AppModule, new ExpressAdapter(server), { logger: config.LOG_LEVELS });
     app.setGlobalPrefix(config.CURRENT_VERSION_PREFIX);
     app.useGlobalPipes(
         new ValidationPipe({

src/main.ts

@@ -19,6 +19,7 @@ async function bootstrap() {
         API_PREFIX: "/api",
         CURRENT_VERSION_PREFIX: "/api" + "/v1",
         SWAGGER_PREFIX: "/api" + "/v1" + "/docs",
+        LOG_LEVELS: configuration()["logLevels"]
     };
     const server = express();
 
@@ -44,9 +45,5 @@ async function bootstrap() {
     } catch (err) {
         BuiltInLogger.log("Could not setup https, skipping.");
     }
-
-    //const url = await httpServer.;
-    // Logger.log(`Swagger on: ${url}${config.SWAGGER_PREFIX}`);
-    // Logger.log(`Application started on: ${url}${config.CURRENT_VERSION_PREFIX}`);
 }
 void bootstrap();