fab-manager/app/assets/javascripts/services/pagination_service.js

/* eslint-disable
    no-return-assign,
    no-undef,
*/
// TODO: This file was created by bulk-decaffeinate.
// Fix any style issues and re-enable lint.
/*
 * decaffeinate suggestions:
 * DS102: Remove unnecessary code created because of implicit returns
 * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
 */
'use strict'

Application.Services.factory('paginationService', [function () {
  const helpers = {}

  helpers.pageCount = (totalCount, perPage) => Math.ceil(totalCount / perPage)

  helpers.hasNextPage = function (currentPage, totalCount, perPage) {
    const _pageCount = helpers.pageCount(totalCount, perPage)
    return (_pageCount !== currentPage) && (_pageCount !== 0)
  }

  const Instance = function (resourceService, currentPage, perPage, totalCount, defaultQueryParams, callback, functionName) {
    this.resourceService = resourceService
    this.currentPage = currentPage
    this.perPage = perPage
    this.totalCount = totalCount
    this.defaultQueryParams = defaultQueryParams
    this.callback = callback
    this.functionName = functionName || 'query'
    this.loading = false

    this.pageCount = function () {
      return helpers.pageCount(this.totalCount, this.perPage)
    }

    this.hasNextPage = function () {
      return helpers.hasNextPage(this.currentPage, this.totalCount, this.perPage)
    }

    this.loadMore = function (queryParams) {
      let k, v
      this.currentPage += 1
      this.loading = true

      const _queryParams = { page: this.currentPage, per_page: this.perPage }

      if (queryParams) {
        for (k in queryParams) {
          v = queryParams[k]
          _queryParams[k] = v
        }
      }

      for (k in this.defaultQueryParams) {
        v = this.defaultQueryParams[k]
        _queryParams[k] = v
      }

      return this.resourceService[this.functionName](_queryParams, dataPromise => {
        this.callback(dataPromise)
        return this.loading = false
      })
    }
  }

  return { Instance }
}
])