utils.js

import { xhrStatuses } from 'redux-simple-resource';

function findResourceById({ state, resourceName, idAttribute = 'id', id }) {
  return state[resourceName].resources.filter(r => r[idAttribute] === id);
}

function checkReadManyStatus({ state, resources, status, every, includeNull }) {
  const check = every ? 'every' : 'some';
  let arrayResources = resources instanceof Array ? resources : [resources];
  return resources
    .map(r => {
      return (
        state[r].resourceListMeta.readXhrStatus === status ||
        (includeNull && state[r].resourceListMeta.readXhrStatus === xhrStatuses.NULL)
      );
    })
    [check](r => r);
}

export function getReadManyStatus({ state, resources, status, includeNull = true }) {
  let arrayResources = resources instanceof Array ? resources : [resources];

  let pending = false;
  let failed = false;
  let succeeded = false;

  let successCount = 0;
  for (let i = 0; i < arrayResources.length; i++) {
    const r = arrayResources[0];
    const meta = state[r].resourceListMeta;
    const status = meta.readXhrStatus;

    if (status === xhrStatuses.FAILED) {
      pending = false;
      failed = true;
      break;
    } else if (
      status === xhrStatuses.PENDING ||
      (includeNull && status === xhrStatuses.NULL)
    ) {
      pending = true;
      break;
    } else if (status === xhrStatuses.SUCCEEDED) {
      successCount++;
    }
  }

  if (successCount === arrayResources.length) {
    succeeded = true;
  }

  return { pending, failed, succeeded };
}

export function isReadManyPending({ state, resources, includeNull = true }) {
  return checkReadManyStatus({
    state, resources, includeNull,
    status: xhrStatuses.PENDING,
    every: false
  });
}

export function isReadManyFailed({ state, resources }) {
  return checkReadManyStatus({
    state, resources,
    status: xhrStatuses.FAILED,
    every: false
  });
}

export function isReadManySucceeded({ state, resources }) {
  return checkReadManyStatus({
    state, resources,
    status: xhrStatuses.PENDING,
    every: true
  });
}