Merge pull request #4 from DereC4/handleMultipleClasses

Handle multiple classes

main.js

@@ -7,6 +7,7 @@ if(chartDiv.getAttribute('value') == 'invisible'){
 }
 var gradeChart;
 const ctx = document.getElementById("gradeBar");
+const gradeLabels = ["A", "A-", "B+", "B", "B-", "C+", "C", "C-", "D+", "D", "D-", "F"];
 
 /*
  Parse the input form and class data
@@ -80,6 +81,7 @@ async function PapaParse(department, num, name, sem) {
     }
     
     console.log(selectedClass);
+    
     let gradeDist = { 
         "A": 0,
         'A-': 0,
@@ -95,31 +97,24 @@ async function PapaParse(department, num, name, sem) {
         'F': 0,
         'Other': 0
     };
+
+    let lableName = selectedClass[0]["Course Title"];
     for(i in selectedClass) {
         let letterGrade = selectedClass[i]["Letter Grade"];
         let cnt = selectedClass[i]["Count of letter grade"]
         gradeDist[letterGrade] += cnt;
+        if(!(lableName === selectedClass[i]["Course Title"])) {
+            lableName = "Multiple courses found using the same ID; try specifying a course name!"
+        }
         // console.log(selectedClass[i]["Letter Grade"]);
         // console.log(selectedClass[i]["Count of letter grade"]);
     }
     console.log(gradeDist);
     if(gradeChart) {
         gradeChart.config.data = {
-            labels: [           
-                'A',
-                'A-',
-                'B+',
-                'B',
-                'B-',
-                'C+',
-                'C',
-                'C-',
-                'D+',
-                'D',
-                'D-',
-                'F'],
+            labels: gradeLabels,
             datasets: [{
-                label: 'Grade distribution for \"' + selectedClass[0]["Course Title"] +"\"",
+                label: 'Grade distribution for \"' + lableName +"\"",
                 data: Object.values(gradeDist),
                 borderWidth: 2,
                 // borderColor: '#36A2EB',
@@ -128,7 +123,7 @@ async function PapaParse(department, num, name, sem) {
             };
         gradeChart.update();
     } else {
-        loadChart(gradeDist, selectedClass[0]["Course Title"]);
+        loadChart(gradeDist, lableName);
         aboutDiv.style.visibility='hidden';
         chartDiv.style.display = '';
     }
@@ -138,19 +133,7 @@ function loadChart(gradeDist, courseName) {
     gradeChart = new Chart(ctx, {
         type: 'bar',
         data: {
-        labels: [           
-            'A',
-            'A-',
-            'B+',
-            'B',
-            'B-',
-            'C+',
-            'C',
-            'C-',
-            'D+',
-            'D',
-            'D-',
-            'F'],
+        labels: gradeLabels,
         datasets: [{
             label: 'Grade distribution for \"' + courseName + "\"",
             data: Object.values(gradeDist),