api-server/src/modules/users/users.repository.ts

import { Injectable } from '@nestjs/common';

@Injectable()
export class UsersRepository {
  private profiles: Map<string, any> = new Map();
  private preferences: Map<string, any> = new Map();

  async findProfileByUserId(userId: string) {
    return this.profiles.get(userId) || {
      userId,
      nickname: '学习者',
      learningDirection: '',
      bio: '',
    };
  }

  async updateProfile(userId: string, dto: any) {
    const existing = (await this.findProfileByUserId(userId)) || {};
    const updated = { ...existing, ...dto };
    this.profiles.set(userId, updated);
    return updated;
  }

  async updatePreferences(userId: string, dto: any) {
    const existing = this.preferences.get(userId) || {
      userId,
      defaultFocusMinutes: 25,
      aiSuggestionLevel: 'normal',
      language: 'zh-CN',
      appearance: 'system',
      notificationEnabled: true,
    };
    const updated = { ...existing, ...dto };
    this.preferences.set(userId, updated);
    return updated;
  }
}