freecodecamp--freecodecamp/curriculum/challenges/english/blocks/daily-coding-challenges-javascript/69d03e549613fbdbe21d11e0.md

id, title, challengeType, dashedName

id	title	challengeType	dashedName
69d03e549613fbdbe21d11e0	Challenge 271: Medication Reminder	28	challenge-271

--description--

Given an array of medications and a string representing the current time, return the next medication you need to take and how long until you need to take it.

• Each medication is in the format [name, lastTaken], where name is the name of the medication and lastTaken is the time it was last taken.
• All given times will be in "HH:MM" (24-hour) format.

Use the following medication schedule:

Name	Schedule
Deployxitrin	08:00, 16:00
Debuggamanizole	07:00, 13:00, 21:00
Mergeflictamine	every 4 hours

Return a string in the format "{name} in Hh Mm". For example, "Debuggamanizole in 2h 0m" or "Deployxitrin in 1h 5m".

--hints--

medicationReminder([["Deployxitrin", "08:00"], ["Debuggamanizole", "07:00"], ["Mergeflictamine", "10:00"]], "11:00") should return "Debuggamanizole in 2h 0m".

assert.equal(medicationReminder([["Deployxitrin", "08:00"], ["Debuggamanizole", "07:00"], ["Mergeflictamine", "10:00"]], "11:00"), "Debuggamanizole in 2h 0m");

medicationReminder([["Deployxitrin", "08:00"], ["Debuggamanizole", "13:00"], ["Mergeflictamine", "14:00"]], "14:55") should return "Deployxitrin in 1h 5m".

assert.equal(medicationReminder([["Deployxitrin", "08:00"], ["Debuggamanizole", "13:00"], ["Mergeflictamine", "14:00"]], "14:55"), "Deployxitrin in 1h 5m");

medicationReminder([["Deployxitrin", "08:00"], ["Debuggamanizole", "13:00"], ["Mergeflictamine", "14:00"]], "17:15") should return "Mergeflictamine in 0h 45m".

assert.equal(medicationReminder([["Deployxitrin", "08:00"], ["Debuggamanizole", "13:00"], ["Mergeflictamine", "14:00"]], "17:15"), "Mergeflictamine in 0h 45m");

medicationReminder([["Deployxitrin", "08:00"], ["Debuggamanizole", "07:00"], ["Mergeflictamine", "09:00"]], "12:59") should return "Debuggamanizole in 0h 1m".

assert.equal(medicationReminder([["Deployxitrin", "08:00"], ["Debuggamanizole", "07:00"], ["Mergeflictamine", "09:00"]], "12:59"), "Debuggamanizole in 0h 1m");

medicationReminder([["Deployxitrin", "08:00"], ["Debuggamanizole", "21:00"], ["Mergeflictamine", "03:00"]], "06:55") should return "Debuggamanizole in 0h 5m".

assert.equal(medicationReminder([["Deployxitrin", "08:00"], ["Debuggamanizole", "21:00"], ["Mergeflictamine", "03:00"]], "06:55"), "Debuggamanizole in 0h 5m");

medicationReminder([["Deployxitrin", "08:00"], ["Debuggamanizole", "07:00"], ["Mergeflictamine", "07:30"]], "08:00") should return "Mergeflictamine in 3h 30m".

assert.equal(medicationReminder([["Deployxitrin", "08:00"], ["Debuggamanizole", "07:00"], ["Mergeflictamine", "07:30"]], "08:00"), "Mergeflictamine in 3h 30m");

--seed--

--seed-contents--

function medicationReminder(medications, currentTime) {

  return medications;
}

--solutions--

function medicationReminder(medications, currentTime) {
  const schedule = {
    Deployxitrin: { type: 'fixed', times: ['08:00', '16:00'] },
    Debuggamanizole: { type: 'fixed', times: ['07:00', '13:00', '21:00'] },
    Mergeflictamine: { type: 'interval', hours: 4 }
  };

  const toMinutes = t => {
    const [h, m] = t.split(':').map(Number);
    return h * 60 + m;
  };

  const current = toMinutes(currentTime);
  let earliest = Infinity;
  let nextMed = '';

  for (const [name, lastTaken] of medications) {
    const med = schedule[name];
    let nextDue;

    if (med.type === 'fixed') {
      const futureTimes = med.times
        .map(toMinutes)
        .filter(t => t > current);
      if (futureTimes.length === 0) continue;
      nextDue = Math.min(...futureTimes);
    } else {
      nextDue = toMinutes(lastTaken) + med.hours * 60;
    }

    const diff = nextDue - current;
    if (diff > 0 && diff < earliest) {
      earliest = diff;
      nextMed = name;
    }
  }

  const h = Math.floor(earliest / 60);
  const m = earliest % 60;
  return `${nextMed} in ${h}h ${m}m`;
}