Merge pull request #434 from kzi-nastava/feat/add-reports-for-average…

…-points

[feat] Implement functionality for director so he can receive reports average number of points and penalty points) via email.

LangLang/BusinessLogic/UseCases/CourseService.cs

@@ -36,6 +36,11 @@ public void Update(Course course)
             _courses.Update(course);
         }
 
+        public List<string> GetLanguages()
+        {
+            return GetAll().Select(course => course.Language).Distinct().ToList();
+        }
+
         public void Delete(int id)
         {
             _courses.Delete(id);

LangLang/BusinessLogic/UseCases/DirectorService.cs

@@ -16,5 +16,10 @@ public List<Director> GetAll()
         {
             return _directors.GetAll();
         }
+
+        public Director Get(int id)
+        {
+            return _directors.Get(id);
+        }
     }
 }

LangLang/BusinessLogic/UseCases/ExamSlotService.cs

@@ -48,7 +48,14 @@ public List<ExamSlot> GetGraded()
             return gradedExams;
         }
 
-
+        // returns all graded exams for a specified language
+        public List<ExamSlot> GetByLanguage(string language)
+        {
+            var exams = GetAll().Where(exam => exam.Language.Equals(language, StringComparison.OrdinalIgnoreCase)).ToList();
+            var resultService = new ExamResultService();
+
+            return exams.Where(exam => !resultService.GetByExam(exam).All(result => result.Outcome != ExamOutcome.NotGraded && exam.ResultsGenerated)).ToList();
+        }
 
         //function takes examslot and adds it to dictionary of examslots
         //function saves changes and returns if adding was successful

LangLang/BusinessLogic/UseCases/PdfService.cs

@@ -3,40 +3,51 @@
 using Syncfusion.Pdf;
 using System.IO;
 using System;
+using System.Collections.Generic;
 
 namespace LangLang.BusinessLogic.UseCases
 {
     public class PdfService
     {
         public static PdfDocument GeneratePdf<T>(T data, string[] headers, string reportName, Func<T, PdfGrid> DataToGrid)
         {
-            {
-                using (PdfDocument document = new PdfDocument())
-                {
-                    document.PageSettings.Size = PdfPageSize.A4;
+            PdfDocument document = new PdfDocument();
+
+            document.PageSettings.Size = PdfPageSize.A4;
+
+            PdfPage page = document.Pages.Add();
+            PdfGraphics graphics = page.Graphics;
 
-                    PdfPage page = document.Pages.Add();
-                    PdfGraphics graphics = page.Graphics;
+            PdfFont font = new PdfStandardFont(PdfFontFamily.Helvetica, 20);
+            graphics.DrawString(reportName, font, PdfBrushes.Black, new Syncfusion.Drawing.PointF(0, 0));
 
-                    PdfFont font = new PdfStandardFont(PdfFontFamily.Helvetica, 20);
-                    graphics.DrawString(reportName, font, PdfBrushes.Black, new Syncfusion.Drawing.PointF(0, 0));
+            PdfGrid pdfGrid = DataToGrid(data);
+            pdfGrid.Headers.Add(1);
 
-                    PdfGrid pdfGrid = DataToGrid(data);
-                    pdfGrid.Headers.Add(1);
+            PdfGridRow pdfGridHeader = pdfGrid.Headers[0];
+            for (int i = 0; i < headers.Length; i++)
+                pdfGridHeader.Cells[i].Value = headers[i];
 
-                    PdfGridRow pdfGridHeader = pdfGrid.Headers[0];
-                    for (int i = 0; i < headers.Length; i++)
-                        pdfGridHeader.Cells[i].Value = headers[i];
+            pdfGrid.Draw(page, new Syncfusion.Drawing.PointF(0, 40));
 
-                    pdfGrid.Draw(page, new Syncfusion.Drawing.PointF(0, 40));
+            string fileName = $"{reportName}.pdf";
+            using (FileStream stream = new FileStream(fileName, FileMode.Create))
+                document.Save(stream);
 
-                    string fileName = $"{reportName}.pdf";
-                    using (FileStream stream = new FileStream(fileName, FileMode.Create))
-                        document.Save(stream);
+            return document;
+        }
 
-                    return document;
-                }
+        public PdfGrid DataToGrid(Dictionary<string, double> data)
+        {
+            PdfGrid grid = new PdfGrid();
+            grid.Columns.Add(2);
+            foreach (var item in data)
+            {
+                PdfGridRow row = grid.Rows.Add();
+                row.Cells[0].Value = item.Key;
+                row.Cells[1].Value = item.Value.ToString();
             }
+            return grid;
         }
 
     }

LangLang/BusinessLogic/UseCases/ReportService.cs

@@ -1,8 +1,9 @@
-
+using System;
 using LangLang.Configuration;
 using LangLang.Domain.Enums;
 using LangLang.Domain.Models;
 using System.Collections.Generic;
+using System.Linq;
 
 namespace LangLang.BusinessLogic.UseCases
 {
@@ -105,5 +106,68 @@ public Dictionary<Course, List<double>> GetAverageGradesOfCourses()
             }
             return averages;
         }
+
+
+        // methods below for average penalty points
+        public Dictionary<string, double> GetAveragePenaltyPoints()
+        {
+            var points = new Dictionary<string, double>();
+            var courseService = new CourseService();
+            foreach (string language in courseService.GetLanguages())
+                points[language] = GetAveragePenaltyPoints(language);
+            return points;
+        }
+
+        private double GetAveragePenaltyPoints(string language)
+        {
+            int points = 0;
+
+            var courseService = new CourseService();
+            var penaltyPointService = new PenaltyPointService();
+
+            var courses = courseService.GetAll().Where(course => course.Language.Equals(language, StringComparison.OrdinalIgnoreCase));
+            foreach (Course course in courses)
+                points += penaltyPointService.GetByCourse(course).Count;
+
+            return points;
+        }
+
+        // methods below for average points
+        public Dictionary<string, double> GetAveragePoints()
+        {
+            var courseService = new CourseService();
+            var points = new Dictionary<string, double>();
+            foreach (string language in courseService.GetLanguages())
+                points[language] = GetAveragePoints(language);
+            return points;
+        }
+
+        private double GetAveragePoints(string language)
+        {
+            var examService = new ExamSlotService();
+            var resultService = new ExamResultService();
+            var exams = examService.GetByLanguage(language);
+
+            int total = 0;
+            int examinees = 0;
+
+            foreach (ExamSlot exam in exams)
+            {
+                var results = resultService.GetByExam(exam);
+                total += GetTotalPoints(results);
+                examinees += results.Count;
+            }
+
+            return examinees == 0 ? 0 : (double)total / examinees;
+        }
+
+        private int GetTotalPoints(List<ExamResult> results)
+        {
+            int total = 0;
+            foreach (ExamResult result in results)
+                total += result.ListeningPoints + result.ReadingPoints + result.SpeakingPoints + result.WritingPoints;
+            return total;
+        }
+
     }
 }

LangLang/BusinessLogic/UseCases/SenderService.cs

@@ -1,4 +1,4 @@
-using LangLang.Composition;
+using LangLang.Composition;
 using LangLang.Configuration;
 using LangLang.Domain.Enums;
 using LangLang.Domain.Models;
@@ -10,6 +10,7 @@ namespace LangLang.BusinessLogic.UseCases
 {
     public class SenderService
     {
+
         private IEmailRepository _emails;
 
         public SenderService()
@@ -37,6 +38,29 @@ public void SendResults(ExamSlot exam)
             }
         }
 
+        public void SendAveragePoints(Director director)
+        {
+            var reportService = new ReportService();
+            var pdfService = new PdfService();
+
+            var reportName = "Average points per language";
+            var headers = new string[] { "Language", "Average points" };
+
+            var document = PdfService.GeneratePdf<Dictionary<string, double>>(reportService.GetAveragePoints(), headers, reportName, data => pdfService.DataToGrid(data));
+            EmailService.SendEmail(director.Profile.Email, reportName, "", document);
+        }
+
+        public void SendAveragePenaltyPoints(Director director)
+        {
+            var reportService = new ReportService();
+            var pdfService = new PdfService();
+
+            var reportName = "Average penalty points per language";
+            var headers = new string[] { "Language", "Average penalty points" };
+
+            var document = PdfService.GeneratePdf<Dictionary<string, double>>(reportService.GetAveragePenaltyPoints(), headers, reportName, data => pdfService.DataToGrid(data));
+            EmailService.SendEmail(director.Profile.Email, reportName, "", document);
+        }
         public void SendGratitudeMail(Course course, List<Student> students)
         {
             foreach (var student in students)
@@ -123,6 +147,5 @@ private string GetGratitudeSubject()
         {
             return _emails.GetContent("gratitudeSubject");
         }
-
     }
 }

LangLang/Domain/RepositoryInterfaces/IDirectorRepository.cs

@@ -5,6 +5,7 @@ namespace LangLang.Domain.RepositoryInterfaces
 {
     public interface IDirectorRepository{
         public List<Director> GetAll();
+        public Director Get(int id);
         public void Save();
         public Dictionary<int, Director> Load();
     }

LangLang/Repositories/DirectorRepository.cs

@@ -20,6 +20,11 @@ public List<Director> GetAll()
             return _directors.Values.ToList();
         }
 
+        public Director Get(int id)
+        {
+            return _directors[id];
+        }
+
         // NOTE: The methods below are temporary until connecting to the database.
 
         public void Save()

LangLang/WPF/ViewModels/DirectorViewModels/ReportsViewModel.cs

@@ -1,8 +1,34 @@
-namespace LangLang.WPF.ViewModels.DirectorViewModels
+using LangLang.BusinessLogic.UseCases;
+using LangLang.Domain.Models;
+using System.Windows;
+
+namespace LangLang.WPF.ViewModels.DirectorViewModels
 {
     public class ReportsViewModel
     {
-        public ReportsViewModel() {}
-
+        private Director _director;
+        public ReportsViewModel(Director director) {
+            _director = director;   
+        }
+
+        public void SentAveragePoints()
+        {
+            var senderService = new SenderService();
+            senderService.SendAveragePoints(_director);
+            ShowSuccess();
+        }
+
+        public void SentAveragePenaltyPoints()
+        {
+            var senderService = new SenderService();
+            senderService.SendAveragePenaltyPoints(_director);
+            ShowSuccess();
+        }
+
+        private void ShowSuccess()
+        {
+            MessageBox.Show("Successfully completed!", "Notification", MessageBoxButton.OK, MessageBoxImage.Information);
+        }
+
     }
 }

LangLang/WPF/ViewModels/MainWindowViewModel.cs

@@ -87,7 +87,7 @@ private void OpenAppropriateWindow(Profile profile)
             }
             else if (profile.Role == UserType.Director)
             {
-                DirectorWindow directorWindow = new();
+                DirectorWindow directorWindow = new(profile);
                 directorWindow.Show();
             }
         }

LangLang/WPF/Views/DirectorView/DirectorWindow.xaml.cs

@@ -1,16 +1,20 @@
 using System.Windows;
 using System.Windows.Controls;
+using LangLang.BusinessLogic.UseCases;
+using LangLang.Domain.Models;
 using LangLang.WPF.Views.DirectorView.Tabs;
 
 namespace LangLang.WPF.Views.DirectorView
 {
     public partial class DirectorWindow : Window
     {
-
-        public DirectorWindow()
+        public Director CurrentlyLoggedIn { get; set; }
+        public DirectorWindow(Profile currentlyLoggedIn)
         {
             InitializeComponent();
             DataContext = this;
+            var directorService = new DirectorService();
+            CurrentlyLoggedIn = directorService.Get(currentlyLoggedIn.Id);
             GenerateTabs();
         }
 
@@ -22,7 +26,7 @@ private void GenerateTabs()
             AddTab("Results Sending", resultsTab);
             var gradedCoursesTab = new GradedCourses();
             AddTab("Graded courses", gradedCoursesTab);
-            var reportsTab = new Reports();
+            var reportsTab = new Reports(CurrentlyLoggedIn);
             AddTab("Reports", reportsTab);
             var coursesTab = new CoursesReview();
             AddTab("Courses", coursesTab);

LangLang/WPF/Views/DirectorView/Tabs/Reports.xaml

@@ -22,8 +22,8 @@
 
             <Button Grid.Row="0" Content="The number of penalty points received in each course in the past year" BorderBrush="White" Background="#FFFFDBDB" Foreground="#FF817C7C" FontFamily="Segoe UI Black" />
             <Button Grid.Row="1" Content="The average grade of students who had n points (0 ≤ n ≤ 3)" BorderBrush="White" Background="#FFFFDBDB" Foreground="#FF817C7C" FontFamily="Segoe UI Black" />
-            <Button Grid.Row="2" Content="Number of average points per language" BorderBrush="White" Background="#FFFFDBDB" Foreground="#FF817C7C" FontFamily="Segoe UI Black" />
-            <Button Grid.Row="3" Content="Number of average penalty points per language" BorderBrush="White" Background="#FFFFDBDB" Foreground="#FF817C7C" FontFamily="Segoe UI Black" />
+            <Button Grid.Row="2" Content="Number of average points per language" BorderBrush="White" Background="#FFFFDBDB" Foreground="#FF817C7C" FontFamily="Segoe UI Black" Click="AveragePoints_Click" />
+            <Button Grid.Row="3" Content="Number of average penalty points per language" BorderBrush="White" Background="#FFFFDBDB" Foreground="#FF817C7C" FontFamily="Segoe UI Black" Click="AveragePenaltyPoints_Click" />
             <Button Grid.Row="4" Content="Number of created courses for each of the existing languages in the system in the last year" BorderBrush="White" Background="#FFFFDBDB" Foreground="#FF817C7C" FontFamily="Segoe UI Black" />
             <Button Grid.Row="5" Content="Number of created  exams for each of the existing languages in the system in the last year" BorderBrush="White" Background="#FFFFDBDB" Foreground="#FF817C7C" FontFamily="Segoe UI Black" />
             <Button Grid.Row="6" Content="Report b" BorderBrush="White" Background="#FFFFDBDB" Foreground="#FF817C7C" FontFamily="Segoe UI Black" />

LangLang/WPF/Views/DirectorView/Tabs/Reports.xaml.cs

@@ -1,5 +1,6 @@
 using LangLang.WPF.ViewModels.DirectorViewModels;
 using System.Windows.Controls;
+using LangLang.Domain.Models;
 
 namespace LangLang.WPF.Views.DirectorView.Tabs
 {
@@ -9,12 +10,21 @@ namespace LangLang.WPF.Views.DirectorView.Tabs
     public partial class Reports : UserControl
     {
         private ReportsViewModel _viewModel;
-        public Reports()
+        public Reports(Director loggedIn)
         {
             InitializeComponent();
-            _viewModel = new();
+            _viewModel = new(loggedIn);
             DataContext = _viewModel;
         }
 
+        private void AveragePoints_Click(object sender, System.Windows.RoutedEventArgs e)
+        {
+            _viewModel.SentAveragePoints();
+        }
+
+        private void AveragePenaltyPoints_Click(object sender, System.Windows.RoutedEventArgs e)
+        {
+            _viewModel.SentAveragePenaltyPoints();
+        }
     }
 }