Add units to graph tooltip

borgweb/borg/static/js/index.js

@@ -9,35 +9,51 @@ function set_daily_graph(repoDict) {
 
     var datasets = []
     repoDict.repos.forEach(function (repo) {
-        datasets.push({label: repo.label,
+        datasets.push({
+            label: repo.label,
             data: repo.daily_size,
             fill: false,
             tension: 0.1,
-            borderColor: 'rgb(75, 192, 192)'});
+            borderColor: 'rgb(75, 192, 192)'
+        });
     })
 
     const data = {
-      labels: labels,
-      datasets: datasets
+        labels: labels,
+        datasets: datasets
     };
 
     const config = {
         type: 'line',
         data,
         options: {
+            plugins: {
+                tooltip: {
+                    callbacks: {
+                        label: function (context) {
+                            var label = context.dataset.label || '';
+                            if (context.parsed.y !== null && y_units !== null) {
+                                return `${context.parsed.y} ${y_units}`
+                            } else {
+                                return ""
+                            }
+                        }
+                    }
+                }
+            },
             scales: {
-            y: {
-                ticks: {
-                    display: true,
-                    grid: false,
-                    callback: function(value, index, values) {
-                        return  value + " " + y_units;
+                y: {
+                    ticks: {
+                        display: true,
+                        grid: false,
+                        callback: function (value, index, values) {
+                            return value + " " + y_units;
+                        }
                     }
                 }
             }
         }
-        }
-    };
+    }
 
     var myChart = new Chart(
         document.getElementById('backup_csize_hourly'),