Add WorkingHoursHelper

app/javascript/widget/helpers/WorkingHoursHelper.js

@@ -0,0 +1,94 @@
+const organizeByDay = workingHoursData => {
+  return workingHoursData.reduce((acc, schedule) => {
+    acc[schedule.dayOfWeek] = schedule;
+    return acc;
+  }, {});
+};
+
+const toMinutes = (hours, minutes = 0) => {
+  return hours * 60 + (minutes || 0);
+};
+
+const calculateMinutesUntilOpen = (
+  schedule,
+  currentTimeInMinutes,
+  dayOffset
+) => {
+  if (!schedule || schedule.closedAllDay) {
+    return null;
+  }
+
+  let openHour = schedule.openHour;
+  let openMinutes = schedule.openMinutes;
+
+  if (schedule.openAllDay) {
+    openHour = 0;
+    openMinutes = 0;
+  }
+
+  const openTimeInMinutes = toMinutes(openHour, openMinutes);
+
+  if (dayOffset === 0) {
+    if (currentTimeInMinutes < openTimeInMinutes) {
+      return openTimeInMinutes - currentTimeInMinutes;
+    }
+
+    return null;
+  }
+
+  return (
+    toMinutes(24, 0) * dayOffset + openTimeInMinutes - currentTimeInMinutes
+  );
+};
+
+class WorkingHours {
+  constructor(workingHoursData) {
+    this.workingHoursByDay = organizeByDay(workingHoursData);
+  }
+
+  isOpen(date) {
+    const schedule = this.workingHoursByDay[date.getDay()];
+
+    if (!schedule || schedule.closedAllDay) {
+      return false;
+    }
+
+    if (schedule.openAllDay) {
+      return true;
+    }
+
+    const currentMinutes = toMinutes(date.getHours(), date.getMinutes());
+    const openMinutes = toMinutes(schedule.openHour, schedule.openMinutes);
+    const closeMinutes = toMinutes(schedule.closeHour, schedule.closeMinutes);
+
+    return currentMinutes >= openMinutes && currentMinutes <= closeMinutes;
+  }
+
+  openInMinutes(date) {
+    if (this.isOpen(date)) {
+      return 0;
+    }
+
+    const currentMinutes = toMinutes(date.getHours(), date.getMinutes());
+
+    for (let i = 0; i < 7; i += 1) {
+      const checkDate = new Date(date);
+      checkDate.setDate(date.getDate() + i);
+
+      const schedule = this.workingHoursByDay[checkDate.getDay()];
+      const minutesUntilOpen = calculateMinutesUntilOpen(
+        schedule,
+        currentMinutes,
+        i
+      );
+
+      if (minutesUntilOpen !== null) {
+        return minutesUntilOpen;
+      }
+    }
+
+    return -1;
+  }
+}
+
+export default WorkingHours;