From e6c03c1acaa216f5dc3115a45506700bab49f4fa Mon Sep 17 00:00:00 2001
From: Tibo De Peuter <tibo.depeuter@ugent.be>
Date: Sun, 2 Mar 2025 13:58:08 +0100
Subject: [PATCH] chore(backend): Definieer logger voor MikroORM

Maak gebruik van juiste logging niveau voor elke taak (namespace)
---
 backend/src/logging/mikroOrmLogger.ts | 88 +++++++++++++++++++++++++++
 1 file changed, 88 insertions(+)
 create mode 100644 backend/src/logging/mikroOrmLogger.ts

diff --git a/backend/src/logging/mikroOrmLogger.ts b/backend/src/logging/mikroOrmLogger.ts
new file mode 100644
index 00000000..4fbadb96
--- /dev/null
+++ b/backend/src/logging/mikroOrmLogger.ts
@@ -0,0 +1,88 @@
+import { DefaultLogger, LogContext, LoggerNamespace } from '@mikro-orm/core';
+import { Logger } from 'winston';
+import { getLogger } from './initalize';
+import { LokiLabels } from 'loki-logger-ts';
+
+export class MikroOrmLogger extends DefaultLogger {
+    private logger: Logger = getLogger();
+
+    log(namespace: LoggerNamespace, message: string, context?: LogContext) {
+        if (!this.isEnabled(namespace, context)) {
+            return;
+        }
+
+        switch (namespace) {
+            case 'query':
+                this.logger.debug(
+                    this.createMessage(namespace, message, context)
+                );
+                break;
+            case 'query-params':
+                // TODO Which log level should this be?
+                this.logger.info(
+                    this.createMessage(namespace, message, context)
+                );
+                break;
+            case 'schema':
+                this.logger.info(
+                    this.createMessage(namespace, message, context)
+                );
+                break;
+            case 'discovery':
+                this.logger.debug(
+                    this.createMessage(namespace, message, context)
+                );
+                break;
+            case 'info':
+                this.logger.info(
+                    this.createMessage(namespace, message, context)
+                );
+                break;
+            case 'deprecated':
+                this.logger.warn(
+                    this.createMessage(namespace, message, context)
+                );
+                break;
+            default:
+                switch (context?.level) {
+                    case 'info':
+                        this.logger.info(
+                            this.createMessage(namespace, message, context)
+                        );
+                        break;
+                    case 'warning':
+                        this.logger.warn(message);
+                        break;
+                    case 'error':
+                        this.logger.error(message);
+                        break;
+                    default:
+                        this.logger.debug(message);
+                        break;
+                }
+        }
+    }
+
+    private createMessage(
+        namespace: LoggerNamespace,
+        messageArg: string,
+        context?: LogContext
+    ) {
+        const labels: LokiLabels = {
+            service: 'ORM',
+        };
+
+        let message: string;
+        if (context?.label) {
+            message = `[${namespace}] (${context?.label}) ${messageArg}`;
+        } else {
+            message = `[${namespace}] ${messageArg}`;
+        }
+
+        return {
+            message: message,
+            labels: labels,
+            context: context,
+        };
+    }
+}