u-mongoose-expressapi/src/common/helpers/handleAsync.js

Common functions for Express and Mongoose API

const formidable = require('formidable');
const { handleError } = require('./errorHandler');
const { Response } = require('./responseHandler');
const mongoose = require('mongoose');

exports.handleAsync = (fn, model, customError, status = 400) => {
  return async (req, res, next) => {
    try {
      await fn(req, res, next);
    } catch (error) {
      console.log(`error on =====${model}===`, error);
      if (customError) {
        return Response(res, status, customError);
      }
      handleError(res, error);
      next(error);
    }
  };
};

exports.handleAsyncSession = (fn, modelName, customError, status = 400) => {
  return async (req, res, next) => {
    const session = await mongoose.startSession();
    session.startTransaction();

    try {
      await fn(req, res, next, session);
      await session.commitTransaction();
    } catch (error) {
      await session.abortTransaction();
      console.log(`Error in ${modelName}:`, error);
      if (!res.headersSent) {
        if (customError) {
          Response(res, status, customError);
        } else {
          handleError(res, error);
        }
      }
      next(error);
    } finally {
      session.endSession();
    }
  };
};

exports.handleSession = async fn => {
  const session = await mongoose.startSession();
  session.startTransaction();
  await fn(session);
};

exports.handleFormAsyncSession = (fn, modelName, customError, status = 400) => {
  return async (req, res, next) => {
    let form = new formidable.IncomingForm();
    form.parse(req, async (err, fields, files) => {
      const session = await mongoose.startSession();
      session.startTransaction();

      try {
        await fn(req, res, next, session, err, fields, files);
        await session.commitTransaction();
      } catch (error) {
        await session.abortTransaction();
        console.log(`Error in ${modelName}:`, error);
        if (customError) {
          Response(res, status, customError);
        } else {
          handleError(res, error);
          next(error);
        }
      } finally {
        session.endSession();
      }
    });
  };
};