alfirin/sept-web-radio

'use strict';

/* global _ */

/* All utilities */

angular.module('septWebRadioFactories');

angular.module('septWebRadioFactories')
  .factory('utilities', [
    function () {
      var utilitiesService = {};

      utilitiesService.removeObjectById =
        function (list, idToRemove) {
          return utilitiesService.removeObjectByAttribute(list, idToRemove, 'id');
        };

      utilitiesService.removeObjectByAttribute =
        function (list, itemToRemove, attributeName) {
          var listSize = _.size(list);
          var elementLoop;
          for (var index = 0; index < listSize; index++) {
            elementLoop = list[index];
            if (elementLoop) {
              if (elementLoop[attributeName] === itemToRemove) {
                list.splice(index, 1);
                break;
              }
            }
          }
          return list;
        };

      utilitiesService.listContainsId = function (list, idToRemove) {
        return utilitiesService.listContainsAttribute(list, idToRemove, 'id');
      };

      utilitiesService.listContainsAttribute = function (list, attributeToTest, attributeName) {
        return _.find(list, function (newItem) {
          return attributeToTest === newItem[attributeName];
        });
      };

      utilitiesService.unionWithAttribute =
        function (listTo, listFrom, attributeToTest) {
          var removed = 0;
          var oldListSize = _.size(listTo);
          var element, even;
          for (var index = 0; index < oldListSize; index++) {
            element = listTo[index - removed];

            even = utilitiesService.listContainsAttribute(listFrom, element[attributeToTest], attributeToTest);

            if (even === undefined) {
              // This element is not presents on the new list
              // So just remove it from the list.
              listTo.splice(index - removed, 1);
              removed++;
            } else {
              // If the element is presents inside the new list, just remove it from the second list
              listFrom = utilitiesService.removeObjectByAttribute(listFrom, element[attributeToTest], attributeToTest);
            }
          }
          return listTo.concat(listFrom);
        };

      utilitiesService.unionWithId =
        function (listTo, listFrom) {
          return utilitiesService.unionWithAttribute(listTo, listFrom, 'id');
        };

      utilitiesService.addOrRemoveItem = function (list, item) {
        if (utilitiesService.isItemNotPresents(list, item)) {
          list.push(item);
        } else {
          // Else, we remove it
          list = utilitiesService.removeItem(list, item);
        }
        return list;
      };

      utilitiesService.removeItem = function (list, item) {
        var index = list.indexOf(item);
        if (index !== -1) {
          list.splice(index, 1);
        }
        return list;
      };

      utilitiesService.isItemNotPresents = function (list, item) {
        return _.indexOf(list, item) === -1;
      };

      utilitiesService.isItemPresents = function (list, item) {
        return !utilitiesService.isItemNotPresents(list, item);
      };

      utilitiesService.getItemById = function (list, itemId) {
        return utilitiesService.getItemByAttribute(list, '_id', itemId);
      };

      utilitiesService.getItemByAttribute = function (list, attributeName, attributeValue) {
        var listSize = _.size(list);
        var elementLoop;
        for (var index = 0; index < listSize; index++) {
          elementLoop = list[index];
          if (elementLoop) {
            if (elementLoop[attributeName] === attributeValue) {
              return elementLoop;
            }
          }
        }
        return undefined;
      };

      return utilitiesService;
    }
  ]);