A simple error handler to be used with the auto-dispatched failTypes in redux-logic.

createErrorHandler.js

function handleError (type, error) {
  console.error(error);
  let payload;
  if (typeof error === 'string') {
    payload = error;
  } else if (error.message) {
    payload = error.message;
  }
  return {type, payload, error: true };
}

export function createErrorHandler(type) {
  return function (error) {
    return handleError(type, error);
  }
}

testLogic.js

// Demonstrates the usage of the former. 
import { createLogic } from 'redux-logic';

import { createErrorHandler } from './createErrorHandler';

const testErrorHandler = createErrorHandler('TESTING_FAILURE');

const testingLogic = createLogic({
  type: 'TESTING',
  latest: true,
  processOptions: {
    successType: 'TESTING_SUCCESS',
    failType: testErrorHandler
  },

  process({action}) {
    return new Promise((resolve, reject) => {
      if (action.payload === 'fail') {
        reject('Failed with reject');
      } else if (action.payload === 'pass') {
        resolve('passed');
      } else {
        const foo = action.get('foo'); // There is no `get` method on action
        foo.toString();
      }
    });
  }
});