[JS][7kyu] When's the next train to Brighton?

codewars/7kyu/when-s-the-next-train-to-brighton/koronya.js

@@ -0,0 +1,30 @@
+// [JS][7kyu] When's the next train to Brighton?
+// when-s-the-next-train-to-brighton
+// https://www.codewars.com/kata/5a07620780171f61ff0000cb/train/javascript
+
+const nextTrain = (time, minutes) => {
+  const minutesNum = Number(minutes)
+  let [h, m] = time.split(':').map(Number)
+  const minuteSum = m + minutesNum
+  m = minuteSum % 60
+  if (minuteSum >= 60) {
+    h += Math.floor(minuteSum / 60)
+  }
+
+  if (m > 30) {
+    if (h >= 23 || h < 5) {
+      return 'The next train is at 05:00.'
+    }
+    h += 1
+    return `The next train is at ${h.toString().padStart(2, '0')}:00.`
+  } else {
+    if (h > 23 || h < 5) {
+      return 'The next train is at 05:00.'
+    }
+    return `The next train is at ${h.toString().padStart(2, '0')}:30.`
+  }
+}
+
+nextTrain('09:35', '10') === 'The next train is at 10:00.'
+nextTrain('17:40', '30') === 'The next train is at 18:30.'
+nextTrain('4:15', '60') === 'The next train is at 05:30.'