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@tc-libs/constant

v4.6.0

Published

Raccoglie costanti condivise usate dagli altri package del monorepo. Al momento espone enum per:

Readme

@tc-libs/constant

Raccoglie costanti condivise usate dagli altri package del monorepo. Al momento espone enum per:

  • ambiente applicativo
  • MIME type di file immagine, audio, video, excel e documenti testuali
  • classificazione logica dei file
  • formati tabellari esportabili

Questo package non registra moduli NestJS e non ha configurazione runtime: si importa direttamente dove serve.

Export pubblici

import {
  ENUM_APP_ENVIRONMENT,
  ENUM_FILE_IMAGE_MIME,
  ENUM_FILE_EXCEL_MIME,
  ENUM_FILE_AUDIO_MIME,
  ENUM_FILE_TEXT_MIME,
  ENUM_FILE_VIDEO_MIME,
  ENUM_FILE_TYPE,
  ENUM_TABLE_FILE_TYPE,
} from '@tc-libs/constant';

Cosa contiene

ENUM_APP_ENVIRONMENT

Valori standard per distinguere il contesto applicativo:

ENUM_APP_ENVIRONMENT.PRODUCTION;
ENUM_APP_ENVIRONMENT.STAGING;
ENUM_APP_ENVIRONMENT.DEVELOPMENT;

Utile per confronti espliciti in config, bootstrap e logica condizionale.

MIME type file

Gli enum MIME vengono usati soprattutto dai package file, doc, request e response per validazione upload ed export.

ENUM_FILE_IMAGE_MIME.PNG;
ENUM_FILE_EXCEL_MIME.XLSX;
ENUM_FILE_AUDIO_MIME.MP3;
ENUM_FILE_VIDEO_MIME.MP4;
ENUM_FILE_TEXT_MIME.PDF;

ENUM_FILE_TEXT_MIME e un oggetto aggregato che unisce plain text, ODT, PDF, DOCX e PowerPoint.

ENUM_FILE_TYPE

Categoria logica del file, indipendente dal MIME specifico:

ENUM_FILE_TYPE.IMAGE;
ENUM_FILE_TYPE.AUDIO;
ENUM_FILE_TYPE.EXCEL;
ENUM_FILE_TYPE.VIDEO;

Viene usato, ad esempio, per applicare limiti diversi ai file binari o per persistere il tipo in entita database.

ENUM_TABLE_FILE_TYPE

Formati tabellari supportati nelle esportazioni:

ENUM_TABLE_FILE_TYPE.CSV;
ENUM_TABLE_FILE_TYPE.XLS;
ENUM_TABLE_FILE_TYPE.XLSX;

Esempi d'uso

Validare un MIME type in upload

import { ENUM_FILE_IMAGE_MIME } from '@tc-libs/constant';

const allowed = Object.values(ENUM_FILE_IMAGE_MIME);

if (!allowed.includes(file.mimetype as ENUM_FILE_IMAGE_MIME)) {
  throw new Error('Unsupported image format');
}

Gestire comportamenti per ambiente

import { ENUM_APP_ENVIRONMENT } from '@tc-libs/constant';

const isProd =
  process.env.NODE_ENV === ENUM_APP_ENVIRONMENT.PRODUCTION;

Tipizzare un'opzione di export

import { ENUM_TABLE_FILE_TYPE } from '@tc-libs/constant';

type ExportOptions = {
  fileType: ENUM_TABLE_FILE_TYPE;
};

Quando usarlo

Usa questo package quando vuoi:

  • evitare stringhe duplicate per MIME type e ambienti
  • condividere enum tipizzati tra piu librerie
  • mantenere allineati validation pipe, DTO e modelli persistiti

Sviluppo

nx build constant
nx test constant