Added percentile ranking calculation based on all population.

FelisiaM · Oct 21, 2017 · a9838ca · a9838ca
1 parent 49592e1
commit a9838ca
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Showing 4 changed files with 32 additions and 4 deletions.
diff --git a/BMI/BMI/BMIReport.cs b/BMI/BMI/BMIReport.cs
@@ -53,10 +53,29 @@ public string GetBmiCategory(double index)
         public Dictionary<string, int> GetBmiPopulationReport(
             List<UserDetails> measurmentsList)
         {
-            return measurmentsList
-                .Select(o => GetBmiCategory(GetBmiIndex(o.Height, o.Weight)))
+            return GetBmiIndexForAllEntries(measurmentsList)
+                .Select(GetBmiCategory)
                 .GroupBy(o => o)
                 .ToDictionary(category => category.Key, category => category.Count());
         }
+
+        public double GetUsersPercentile(List<UserDetails> measurmentsList, double userToFind)
+        {
+            var allEntries = GetBmiIndexForAllEntries(measurmentsList);
+            var list = allEntries.Append(userToFind).ToList();
+
+            list.Sort();
+            var indexInList = list.BinarySearch(userToFind);
+
+            var rank =  indexInList / (double)list.Count * 100;
+
+            return Math.Round(rank, MidpointRounding.AwayFromZero);
+        }
+
+        private IEnumerable<double> GetBmiIndexForAllEntries(IEnumerable<UserDetails> measurmentsList)
+        {
+            return measurmentsList
+                .Select(o => GetBmiIndex(o.Height, o.Weight));
+        }
     }
 }
diff --git a/BMI/BMI/Controllers/HomeController.cs b/BMI/BMI/Controllers/HomeController.cs
@@ -62,6 +62,10 @@ public IActionResult GuestUser(UserDetails details)
                             Count = o.Value
                         })
                     .ToList();
+
+                var usersRanking = _bmiReport.GetUsersPercentile(population, bmiIndex);
+
+                ViewData["UsersRanking"] = usersRanking;
             }
 
             return View();

diff --git a/BMI/BMI/IBmiReport.cs b/BMI/BMI/IBmiReport.cs
@@ -8,5 +8,6 @@ public interface IBmiReport
         double GetBmiIndex(double height, double weight);
         string GetBmiCategory(double index);
         Dictionary<string, int> GetBmiPopulationReport(List<UserDetails> measurmentsList);
+        double GetUsersPercentile(List<UserDetails> measurmentsList, double userToFind);
     }
 }
diff --git a/BMI/BMI/Views/Home/GuestUser.cshtml b/BMI/BMI/Views/Home/GuestUser.cshtml
@@ -6,8 +6,10 @@
 
 @Html.Partial("UserInput")
 
-<h3>@ViewData["Result"]</h3>
+<h4>@ViewData["Result"]</h4>
 
+<h3>Population BMI Report</h3>
+<br/>
 <table border="1">
     <tr>
         <th>
@@ -30,4 +32,6 @@
         </tr>
     }
 
-</table>
+</table>
+
+<h4> You rank in @ViewData["UsersRanking"]% percentile of the population.</h4>