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[feat] create setup logger #8

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[feat] create setup logger #8

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87fe88a
add setup logger
Joel-leal Jan 19, 2026
2293d0c
feat: add AppLogger with structure log to UsersService
Joel-leal Jan 30, 2026
6eedda5
ref: align AppLogger with NestJS patterns and standardize log usage
Joel-leal Feb 2, 2026
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1 change: 1 addition & 0 deletions server/.eslintrc.js
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Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,7 @@ module.exports = {
},
ignorePatterns: ['.eslintrc.js'],
rules: {
'no-console': 'error',
'@typescript-eslint/interface-name-prefix': 'off',
'@typescript-eslint/explicit-function-return-type': 'off',
'@typescript-eslint/explicit-module-boundary-types': 'off',
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3 changes: 2 additions & 1 deletion server/src/app.module.ts
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Expand Up @@ -3,9 +3,10 @@ import { UsersModule } from './users/users.module';
import { VideosModule } from './videos/videos.module';
import { PrismaService } from './prisma.service';
import { SystemService } from './system.service';
import { LoggerModule } from './core/logging/logger.module';

@Module({
imports: [UsersModule, VideosModule],
imports: [UsersModule, VideosModule, LoggerModule],
providers: [SystemService, PrismaService], // Do I need PrismaService here?
})
export class AppModule {}
19 changes: 19 additions & 0 deletions server/src/core/logging/app-logger.service.ts
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@@ -0,0 +1,19 @@
import { Injectable, Scope, ConsoleLogger } from '@nestjs/common';

type LogMeta = Record<string, unknown>;

@Injectable({ scope: Scope.TRANSIENT })
export class AppLogger extends ConsoleLogger {
customLog(message: string, meta?: LogMeta): string {
if (!meta || Object.keys(meta).length === 0) return message;
return `${message} | meta=${this.safeStringify(meta)}`;
}

private safeStringify(value: unknown): string {
try {
return JSON.stringify(value);
} catch {
return '[unserializable-meta]';
}
}
}
8 changes: 8 additions & 0 deletions server/src/core/logging/logger.module.ts
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@@ -0,0 +1,8 @@
import { Module } from '@nestjs/common';
import { AppLogger } from './app-logger.service';

@Module({
providers: [AppLogger],
exports: [AppLogger],
})
export class LoggerModule {}
11 changes: 9 additions & 2 deletions server/src/system.service.ts
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Expand Up @@ -6,14 +6,21 @@ import {
import { promises as fs } from 'fs';
import { join, resolve } from 'path';
import { existsSync } from 'fs';
import { AppLogger } from 'src/core/logging/app-logger.service';

@Injectable()
export class SystemService {
private readonly uploadsDir = join(process.cwd(), 'uploads');
constructor(private readonly logger: AppLogger) {
this.logger.setContext(SystemService.name);

constructor() {
this.findOrCreateUserDirectory(this.uploadsDir);
console.log('uploadsDir', this.uploadsDir);
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@frattezi frattezi Feb 1, 2026

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Update this using your logger


this.logger.debug(
this.logger.customLog('uploadsDir', {
uploadsDir: this.uploadsDir,
}),
);
}

/**
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2 changes: 2 additions & 0 deletions server/src/users/users.module.ts
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Expand Up @@ -2,9 +2,11 @@ import { Module } from '@nestjs/common';
import { UsersService } from './users.service';
import { UsersController } from './users.controller';
import { PrismaService } from 'src/prisma.service';
import { LoggerModule } from 'src/core/logging/logger.module';

@Module({
controllers: [UsersController],
imports: [LoggerModule],
providers: [UsersService, PrismaService],
})
export class UsersModule {}
53 changes: 47 additions & 6 deletions server/src/users/users.service.ts
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Expand Up @@ -2,20 +2,61 @@ import { Injectable } from '@nestjs/common';
import { User } from 'generated/prisma';
import { PrismaService } from 'src/prisma.service';
import { CreateUserDto } from './users.dto';
import { AppLogger } from 'src/core/logging/app-logger.service';

@Injectable()
export class UsersService {
constructor(private readonly prisma: PrismaService) {}
constructor(
private readonly prisma: PrismaService,
private readonly logger: AppLogger,
) {
this.logger.setContext(UsersService.name);
}

async get(): Promise<User[]> {
return this.prisma.user.findMany();
this.logger.log(
this.logger.customLog('Listing users', {
feature: 'users',
action: 'list',
}),
);
const users = await this.prisma.user.findMany();
this.logger.log(
this.logger.customLog('Users listed', {
count: users.length,
}),
);
return users;
}

async upsert(user: CreateUserDto): Promise<User> {
return this.prisma.user.upsert({
where: { email: user.email },
update: user,
create: user,
this.logger.customLog('Upserting user', {
feature: 'users',
action: 'upsert',
email: user.email,
});

try {
const saved = await this.prisma.user.upsert({
where: { email: user.email },
update: user,
create: user,
});
this.logger.log(
this.logger.customLog('User upserted', {
id: saved.id,
email: saved.email,
}),
);
return saved;
} catch (err) {
const message = err instanceof Error ? err.message : 'Unknown error';
this.logger.error(
this.logger.customLog('Upsert failed', {
email: user.email,
error: message,
}),
);
}
}
}