Feature/use log levels to conditionally log prisma query events (#4003)

* Use LOG_LEVELS for prisma query events

* Update changelog

CHANGELOG.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
+### Added
+
+- Added support for log levels (`LOG_LEVELS`) to conditionally log `prisma` query events (`debug` or `verbose`)
+
 ### Changed
 
 - Restructured the resources page

apps/api/src/services/prisma/prisma.module.ts

@@ -1,9 +1,10 @@
 import { PrismaService } from '@ghostfolio/api/services/prisma/prisma.service';
 
 import { Module } from '@nestjs/common';
+import { ConfigService } from '@nestjs/config';
 
 @Module({
-  providers: [PrismaService],
+  exports: [PrismaService],
-  exports: [PrismaService]
+  providers: [ConfigService, PrismaService]
 })
 export class PrismaModule {}

apps/api/src/services/prisma/prisma.service.ts

@@ -1,16 +1,38 @@
 import {
   Injectable,
   Logger,
+  LogLevel,
   OnModuleDestroy,
   OnModuleInit
 } from '@nestjs/common';
-import { PrismaClient } from '@prisma/client';
+import { ConfigService } from '@nestjs/config';
+import { Prisma, PrismaClient } from '@prisma/client';
 
 @Injectable()
 export class PrismaService
   extends PrismaClient
   implements OnModuleInit, OnModuleDestroy
 {
+  public constructor(configService: ConfigService) {
+    let customLogLevels: LogLevel[];
+
+    try {
+      customLogLevels = JSON.parse(
+        configService.get<string>('LOG_LEVELS')
+      ) as LogLevel[];
+    } catch {}
+
+    const log: Prisma.LogDefinition[] =
+      customLogLevels?.includes('debug') || customLogLevels?.includes('verbose')
+        ? [{ emit: 'stdout', level: 'query' }]
+        : [];
+
+    super({
+      log,
+      errorFormat: 'colorless'
+    });
+  }
+
   public async onModuleInit() {
     try {
       await this.$connect();