sharee.bike-App/TINKLib/ViewModel/MiniSurvey/MiniSurveyViewModel.cs

using Serilog;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using TINK.Model.Connector;
using TINK.Model.MiniSurvey;
using TINK.MultilingualResources;
using TINK.Repository.Exception;
using TINK.View;
using TINK.ViewModel.MiniSurvey.Question;

namespace TINK.ViewModel.MiniSurvey
{
    public class MiniSurveyViewModel : ObservableCollection<IMiniSurveyQuestion>
    {
        /// <summary> Delegate to retrieve connected state. </summary>
        protected Func<bool> IsConnectedDelegate { get; }

        /// <summary> Provides a connector object.</summary>
        private Func<bool, IConnector> ConnectorFactory { get; }

        /// <summary>
        /// Reference on view service to show modal notifications and to perform navigation.
        /// </summary>
        private IViewService ViewService { get; }

        private MiniSurveyModel MiniSurvey { get; }

        /// <summary> Constructs mini survey view model.</summary>
        /// <param name="connectorFactory">Connects system to copri for purposes of requesting a bike/ cancel request.</param>
        /// <param name="viewService">Interface to actuate methodes on GUI.</param>
        public MiniSurveyViewModel(
            Func<bool> isConnectedDelegate,
            Func<bool, IConnector> connectorFactory,
            IViewService viewService)
        {
            IsConnectedDelegate = isConnectedDelegate
                ?? throw new ArgumentException($"Can not instantiate {nameof(MiniSurveyViewModel)}-object. No connector available.");

            ConnectorFactory = connectorFactory
                ?? throw new ArgumentException($"Can not instantiate {nameof(MiniSurveyViewModel)}-object. No connector available.");

            ViewService = viewService
                ?? throw new ArgumentException($"Can not instantiate {nameof(MiniSurveyViewModel)}-object. No view available.");

            MiniSurvey = new MiniSurveyModel
            {
                Title = "Bitte unterstützen Sie unsere Begleitforschung",
                Subtitle = "Ihre drei Antworten werden anonym gespeichert.",
                Footer = "Herzlichen Dank und viel Spaß bei der nächsten Fahrt!"
            };

            MiniSurvey.Questions.Add(
                "q1",
                new MiniSurveyModel.QuestionModel
                {
                    Text = "1. Was war der Hauptzweck dieser Ausleihe?",
                    Type = MiniSurveyModel.Type.SingleAnswer
                });

            MiniSurvey.Questions.Add(
                "q2",
                new MiniSurveyModel.QuestionModel
                {
                    Text = "2. Welches Verkehrsmittel hätten Sie ansonsten benutzt?",
                    Type = MiniSurveyModel.Type.SingleAnswer
                });

            MiniSurvey.Questions.Add(
                "q3",
                new MiniSurveyModel.QuestionModel
                {
                    Text = "3. Haben Sie Anmerkungen oder Anregungen?",
                    Type = MiniSurveyModel.Type.CustomText
                });

            MiniSurvey.Questions["q1"].PossibleAnswers.Add("opt1", "a. Einkauf");
            MiniSurvey.Questions["q1"].PossibleAnswers.Add("opt2", "b. Kinderbeförderung");
            MiniSurvey.Questions["q1"].PossibleAnswers.Add("opt3", "c. Lastentransport");
            MiniSurvey.Questions["q1"].PossibleAnswers.Add("opt4", "d. Freizeit");
            MiniSurvey.Questions["q1"].PossibleAnswers.Add("opt5", "e. Ausprobieren");
            MiniSurvey.Questions["q1"].PossibleAnswers.Add("opt6", "f. Sonstiges");

            MiniSurvey.Questions["q2"].PossibleAnswers.Add("opt1", "a. Auto");
            MiniSurvey.Questions["q2"].PossibleAnswers.Add("opt2", "b. Motorrad oder Motorroller");
            MiniSurvey.Questions["q2"].PossibleAnswers.Add("opt3", "c. Bus oder Bahn");
            MiniSurvey.Questions["q2"].PossibleAnswers.Add("opt4", "d. Eigenes Fahrrad");
            MiniSurvey.Questions["q2"].PossibleAnswers.Add("opt5", "e. Zu Fuß");
            MiniSurvey.Questions["q2"].PossibleAnswers.Add("opt6", "f. Keines (ich hätte die Fahrt sonst nicht gemacht)");

            Title = MiniSurvey.Title;
            Subtitle = MiniSurvey.Subtitle;
            Footer = MiniSurvey.Footer;

            foreach (var question in MiniSurvey.Questions)
            {
                switch (question.Value.Type)
                {
                    case MiniSurveyModel.Type.SingleAnswer:
                        Add(new CheckOneViewModel(
                            new KeyValuePair<string, string>(question.Key, question.Value.Text),
                            question.Value.PossibleAnswers));
                        break;

                    case MiniSurveyModel.Type.CustomText:
                        Add(new FreeTextViewModel(new KeyValuePair<string, string>(question.Key, question.Value.Text)));
                        break;

                    default:
                        break;
                }
            }
        }

        public string Title { get; set; }

        public string Subtitle { get; set; }

        public string Footer { get; set; }

        /// <summary> Processes request to perform a copri action (reserve bike and cancel reservation). </summary>
        public System.Windows.Input.ICommand OnButtonClicked =>  new Xamarin.Forms.Command(async () =>
        {
            Log.ForContext<MiniSurveyViewModel>().Information($"User result {this[0].Answer.Value}, {this[1].Answer.Value}");

            var isConnected = IsConnectedDelegate();
            try
            {
                await ConnectorFactory(isConnected).Command.DoSubmitMiniSurvey(this.ToDictionary(x => x.Question.Key, x => x.Answer.Key));
            }
            catch (Exception exception)
            {
                if (exception is ResponseException copriException)
                {
                    // Copri server is not reachable.
                    Log.ForContext<MiniSurveyViewModel>().Information("Submitting mini survay answer failed. COPRI returned an error.");
                }
                else
                {
                    Log.ForContext<MiniSurveyViewModel>().Error("Submitting mini survay answer failed. {@l_oException}", exception);
                }

                await ViewService.DisplayAlert(
                    AppResources.ErrorReturnSubmitFeedbackTitle,
                    AppResources.ErrorReturnSubmitFeedbackMessage,
                    AppResources.MessageAnswerOk);
            }

            await ViewService.PopModalAsync();
        });
    }
}