New JS file to handle date options

app/assets/javascripts/assets/killbill_date_range.js

@@ -0,0 +1,34 @@
+function setDateRange(option) {
+  var currentDate = new Date();
+  var startDate, endDate;
+
+  if (option === "day") {
+    startDate = new Date();
+    endDate = new Date();
+    endDate.setDate(endDate.getDate() + 1);
+  } else if (option === "week") {
+    startDate = new Date(currentDate.setDate(currentDate.getDate() - currentDate.getDay() + 1));
+    currentDate = new Date();
+    endDate = new Date(currentDate.setDate(currentDate.getDate() - currentDate.getDay() + 7));
+  } else if (option === "month") {
+    startDate = new Date(currentDate.getFullYear(), currentDate.getMonth(), 1);
+    endDate = new Date(currentDate.getFullYear(), currentDate.getMonth() + 1, 0);
+  } else if (option === "year") {
+    startDate = new Date(currentDate.getFullYear(), 0, 1);
+    endDate = new Date(currentDate.getFullYear(), 11, 31);
+  }
+
+  var startDateFormatted = formatDate(startDate);
+  var endDateFormatted = formatDate(endDate);
+
+  $('#startDate').val(startDateFormatted);
+  $('#endDate').val(endDateFormatted);
+  $('#startDate, #endDate').prop('disabled', true);
+}
+
+function formatDate(date) {
+  var year = date.getFullYear();
+  var month = String(date.getMonth() + 1).padStart(2, '0');
+  var day = String(date.getDate()).padStart(2, '0');
+  return `${year}-${month}-${day}`;
+}