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getOpeningHours.js
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getOpeningHours.js
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const { hours } = require('../data/zoo_data');
const weekDays = ['Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday', 'Sunday'];
const dayError = 'The day must be valid. Example: Monday';
const isStringRepresentNumber = (string, what) => {
if (!/^\d+$/.test(string)) {
throw new Error(`The ${what} should represent a number`);
}
};
const validateAbbreviation = (abbreviation) => {
if (!['AM', 'PM'].includes(abbreviation)) {
throw new Error('The abbreviation must be \'AM\' or \'PM\'');
}
};
const validateHour = (hour) => {
const [number, abbreviation] = hour.toUpperCase().split('-');
const [dataHours, dataMinutes] = number.split(':');
isStringRepresentNumber(dataHours, 'hour');
isStringRepresentNumber(dataMinutes, 'minutes');
validateAbbreviation(abbreviation);
switch (false) {
case Number(dataHours) >= 0 && Number(dataHours) <= 12:
throw new Error('The hour must be between 0 and 12');
case Number(dataMinutes) >= 0 && Number(dataMinutes) <= 59:
throw new Error('The minutes must be between 0 and 59');
default:
return null;
}
};
const validateDay = (day) => {
if (!weekDays.includes(day)) {
throw new Error(dayError);
}
};
const empty = (one, two) => !one && !two;
const openOrClosed = (period, hour, open, close) =>
(period === 'AM' && hour >= open) || (period === 'PM' && hour < close);
const getOpeningHours = (day, dataHour) => {
if (empty(day, dataHour)) return hours;
const adjustedDay = `${day[0].toUpperCase()}${day.slice(1).toLowerCase()}`;
validateDay(adjustedDay);
validateHour(dataHour);
const { open, close } = hours[adjustedDay];
if (empty(close, open)) return 'The zoo is closed';
const period = dataHour.split('-')[1].toUpperCase();
const hour = Number(dataHour.split(':')[0]);
let message = 'The zoo is ';
message += openOrClosed(period, hour, open, close) ? 'open' : 'closed';
return message;
};
module.exports = getOpeningHours;