win8phoneApp/CampusAppWP8/CampusAppWP8/Pages/Lecture/LecturePage.xaml.cs

//-----------------------------------------------------------------------
// <copyright file="LecturePage.xaml.cs" company="BTU/IIT">
//     Company copyright tag.
// </copyright>
// <author>stubbfel</author>
// <sience>13.06.2013</sience>
//----------------------------------------------------------------------
namespace CampusAppWP8.Pages.Lecture
{
    using System;
    using System.Collections.Generic;
    using System.Windows;
    using System.Windows.Navigation;
    using CampusAppWP8.Api.Lecture;
    using CampusAppWP8.Model.Lecture;
    using CampusAppWP8.Model.Utility;
    using CampusAppWP8.Resources;
    using CampusAppWP8.Utility.Lui.MessageBoxes;
    using Microsoft.Phone.Controls;

    /// <summary>
    /// Class for the LecturePage
    /// </summary>
    public partial class LecturePage : PhoneApplicationPage
    {
        #region Member

        /// <summary>
        ///  actual LectureAPI
        /// </summary>
        private LectureApi api;

        /// <summary>
        /// List for the courses of the BTU
        /// </summary>
        /// <remarks>
        /// need to be extend to full list
        /// </remarks>
        private LecturePageModel pageModel;

        /// <summary>
        /// flag for initialed page
        /// </summary>
        private bool init;

        #endregion

        #region Constructor
        /// <summary>
        /// Initializes a new instance of the <see cref="LecturePage" /> class.
        /// </summary>
        public LecturePage()
        {
            this.InitializeComponent();
            this.init = false;
            this.LoadPageModel();
            this.SetupListPickers();
            this.init = true;
        }

        #endregion

        #region methods

        #region protected
        
        /// <summary>
        /// Methods overrides the  OnNavigatedFrom-Method
        /// </summary>
        /// <param name="e">some NavigationEventArgs</param>
        protected override void OnNavigatedFrom(NavigationEventArgs e)
        {
            if (NavigationMode.Back == e.NavigationMode)
            {
                // delete all models
                App.SaveToIsolatedStorage<LecturePageModel>(Constants.IsolatedStorage_LecturePageModel, null);
                App.SaveToIsolatedStorage<LectureList>(Constants.IsolatedStorage_LectureModel, null);
            }
            else
            {
                this.StoreSelectedIndex();
                App.SaveToIsolatedStorage<LecturePageModel>(Constants.IsolatedStorage_LecturePageModel, this.pageModel);
            }

            base.OnNavigatedFrom(e);
        }

        #endregion

        #region private

        /// <summary>
        /// Load the PageModel
        /// </summary>
        private void LoadPageModel()
        {
            this.pageModel = new LecturePageModel();
            this.pageModel.LoadLists();
        }

        /// <summary>
        /// Method sets the ItemSource of the ListPickers
        /// </summary>
        private void SetupListPickers()
        {
            this.Course.ItemsSource = this.pageModel.CourseList.List;
            this.Degree.ItemsSource = this.pageModel.DegreeList.List;
            this.From.ItemsSource = this.pageModel.FromNumberList.List;
            this.To.ItemsSource = this.pageModel.ToNumberList.List;
            this.Semester.ItemsSource = this.pageModel.SemesterList.List;

            // load values from last request
            LecturePageModel lastPageModel = App.LoadFromIsolatedStorage<LecturePageModel>(Constants.IsolatedStorage_LecturePageModel);
            if (lastPageModel != null)
            {
                this.SetLastSelectedIndex(lastPageModel);
            }

            this.SetSelectedIndex();
        }

        /// <summary>
        /// Method set the last selected index of the ListPickers
        /// </summary>
        /// <param name="lastPageModel">Last PageModel</param>
        private void SetLastSelectedIndex(LecturePageModel lastPageModel)
        {
            this.pageModel.SelectCourseIndex = lastPageModel.SelectCourseIndex;
            this.pageModel.SelectDegreeIndex = lastPageModel.SelectDegreeIndex;
            this.pageModel.SelectFromIndex = lastPageModel.SelectFromIndex;
            this.pageModel.SelectToIndex = lastPageModel.SelectToIndex;
            this.pageModel.SelectSemesterIndex = lastPageModel.SelectSemesterIndex;
        }

        /// <summary>
        /// Method set the last selected index of the ListPickers
        /// </summary>
        private void SetSelectedIndex()
        {
            this.Course.SelectedIndex = this.pageModel.SelectCourseIndex;
            this.Degree.SelectedIndex = this.pageModel.SelectDegreeIndex;
            this.Semester.SelectedIndex = this.pageModel.SelectSemesterIndex;
            this.From.SelectedIndex = this.pageModel.SelectFromIndex;
            this.To.SelectedIndex = this.pageModel.SelectToIndex;
        }

        /// <summary>
        /// Method store the actual selectIndex to the models
        /// </summary>
        private void StoreSelectedIndex()
        {
            this.pageModel.SelectCourseIndex = this.Course.SelectedIndex;
            this.pageModel.SelectDegreeIndex = this.Degree.SelectedIndex;
            this.pageModel.SelectSemesterIndex = this.Semester.SelectedIndex;
            this.pageModel.SelectFromIndex = this.From.SelectedIndex;
            this.pageModel.SelectToIndex = this.To.SelectedIndex;
        }

        /// <summary>
        /// Method send a request to the Feed 
        /// </summary>
        /// <remarks>
        /// have to  refactors
        /// </remarks>
        /// <param name="sender">sender of this event</param>
        /// <param name="e"> events arguments</param>
        private void SendRequest(object sender, RoutedEventArgs e)
        {
            this.api = new LectureApi();
            this.api.OnLoaded += new LectureApi.OnIO(this.ApiIsReady);
            this.api.OnFailedLoad += new LectureApi.OnFailed(this.ApiIsFail);
            this.ProgressBar.Visibility = System.Windows.Visibility.Visible;
            List<UrlParamModel> parameterList = this.CreateUrlParameter();
            this.api.SetUriParams(parameterList);
            this.api.LoadData();
        }

        /// <summary>
        /// Method read the values from the inputs and put them in a list of parameters
        /// </summary>
        /// <returns>a list of parameters</returns>
        private List<UrlParamModel> CreateUrlParameter()
        {
            ListPickerItemModel semester = (ListPickerItemModel)this.Semester.SelectedItem;
            ListPickerItemModel degree = (ListPickerItemModel)this.Degree.SelectedItem;
            ListPickerItemModel course = (ListPickerItemModel)this.Course.SelectedItem;
            ListPickerItemModel from = (ListPickerItemModel)this.From.SelectedItem;
            ListPickerItemModel to = (ListPickerItemModel)this.To.SelectedItem;

            List<UrlParamModel> parameterList = new List<UrlParamModel>();
            parameterList.Add(new UrlParamModel(Constants.ParamGetLecture_Semester, semester.Value));
            parameterList.Add(new UrlParamModel(Constants.ParamGetLecture_Degree, degree.Value));
            parameterList.Add(new UrlParamModel(Constants.ParamGetLecture_Course, course.Value));
            parameterList.Add(new UrlParamModel(Constants.ParamGetLecture_From, from.Value));
            parameterList.Add(new UrlParamModel(Constants.ParamGetLecture_To, to.Value));
            return parameterList;
        }

        /// <summary>
        /// Method will be execute if the feed is ready
        /// </summary>
        private void ApiIsReady()
        {
            App.SaveToIsolatedStorage<LectureList>(Constants.IsolatedStorage_LectureModel, this.api.Model);
            this.ProgressBar.Visibility = System.Windows.Visibility.Collapsed;
            Uri url = new Uri(Constants.PathLecture_ResultPage, UriKind.Relative);
            NavigationService.Navigate(url);
        }

        /// <summary>
        /// EventHandler for changed degree selection
        /// </summary>
        /// <param name="sender">sender object</param>
        /// <param name="e">some args</param>
        private void DegreeSelectionChanged(object sender, System.Windows.Controls.SelectionChangedEventArgs e)
        {
            if (!this.init)
            {
                return;
            }

            this.pageModel.SelectDegreeIndex = this.Degree.SelectedIndex;
            this.pageModel.LoadFromNumberList();
            this.From.ItemsSource = this.pageModel.FromNumberList.List;
        }

        /// <summary>
        /// EventHandler for changed from selection
        /// </summary>
        /// <param name="sender">sender object</param>
        /// <param name="e">some args</param>
        private void FromSelectionChanged(object sender, System.Windows.Controls.SelectionChangedEventArgs e)
        {
            if (!this.init)
            {
                return;
            }

            this.pageModel.SelectDegreeIndex = this.Degree.SelectedIndex;
            this.pageModel.SelectFromIndex = this.From.SelectedIndex;
            this.pageModel.LoadToNumberList();
            this.To.ItemsSource = this.pageModel.ToNumberList.List;
        }

        /// <summary>
        /// Method will be execute if the feed is failed
        /// </summary>
        private void ApiIsFail()
        {
            MessageBoxResult result = MessageBoxes.ShowMainModelErrorMessageBox(AppResources.MsgBox_ErrorMainModelLoad);
            this.ProgressBar.Visibility = Visibility.Collapsed;
        }

        #endregion

        #endregion
    }
}