Effective ways to transfer data between services and controllers

Is there a way to pass values from services to controllers effectively? Despite researching on stackoverflow, I haven't found a solution that addresses my issue. My goal is to access google spreadsheets using tabletop.js. Interestingly, when I log values from services, they appear as expected. However, when I try to retrieve these spreadsheet values in the controller, an error occurs: chartService.getProperty is not a function

The code for retrieving the URL of the spreadsheet seems to be working fine with the get method. I'm puzzled about what might be causing this problem.

Controller

angular.module('myapp')
  .controller('piechartCtrl', function (chartService, $scope, config) {
    $scope.values = chartService.getProperty();

  });

Service.js

angular.module('myapp')
.service('chartService', function(){
  return {
     getUrl: function init(path) {
        Tabletop.init( { key: path,
                         callback: showInfo,
                         simpleSheet: true } )
     }
  }

function showInfo(data, tabletop) {
    return{
      getProperty: function(){
        return data
      },
      setProperty: function(value){
        data = value;
      }

    }
  }
});

Answer №1

Your unique service revolves around accessing the getUrl function from the controller named chartService. This function is crucial for retrieving data.

service('chartService', function ()
{
    return 
    {
        getUrl: function init(path)
        {
            Tabletop.init({
                key: path,
                callback: showInfo,
                simpleSheet: true
            })
        }
    }

    function showInfo(data, tabletop)
    {
        return 
        {
            getProperty: function ()
            {
                return data
            },
            setProperty: function (value)
            {
                data = value;
            }    
        }
    }
});

To make it functional, although not the most optimal solution, you can modify it like this:

service('chartService', function ()
{
    var returnObject = 
    {
        getUrl: function init(path)
        {
            Tabletop.init({
                key: path,
                callback: showInfo,
                simpleSheet: true
            })
        },
        resultValue: {}
    }

    function showInfo(data, tabletop)
    {
        return 
        {
            getProperty: function ()
            {
                return data
            },
            setProperty: function (value)
            {
                data = value;
                returnObject.resultValue = value;
            }    
        }
    }

    return returnObject
});

Then, replace chartService.getProperty() with chartService.resultValue, but keep in mind that this method is asynchronous.

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