app/services/asserts/PositiveAssert.ts

import type { AssertRule } from '~/types/interfaces'
import { useI18n } from 'vue-i18n'

export class PositiveAssert implements AssertRule {
  supports(key: string): boolean {
    return key === 'positive'
  }

  createRule(criteria: string): (value: unknown) => true | string {
    const { t } = useI18n()

    if (criteria === 'positive') {
      return (value: number) =>
        value === null || value > 0 || t(`must_be_positive`)
    } else if (criteria === 'positive_or_zero') {
      return (value: number) =>
        value === null || value >= 0 || t(`must_be_positive_or_egal_0`)
    }

    return () => true
  }
}