ghostfolio/apps/api/src/app/portfolio/rules.service.ts

import { RuleSettings } from '@ghostfolio/api/models/interfaces/rule-settings.interface';
import { Rule } from '@ghostfolio/api/models/rule';
import { UserSettings } from '@ghostfolio/common/interfaces';

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

@Injectable()
export class RulesService {
  public constructor() {}

  public async evaluate<T extends RuleSettings>(
    aRules: Rule<T>[],
    aUserSettings: UserSettings
  ) {
    return aRules
      .filter((rule) => {
        return rule.getSettings(aUserSettings)?.isActive;
      })
      .map((rule) => {
        const { evaluation, value } = rule.evaluate(
          rule.getSettings(aUserSettings)
        );

        return {
          evaluation,
          value,
          key: rule.getKey(),
          name: rule.getName()
        };
      });
  }
}