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Suppenterrine/FirstAndLastDayFromMonth.js

Last active August 24, 2023 12:46
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JS Date from today and with the first and the last day of the specified month
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FirstAndLastDayFromMonth.js
const fs = require('fs');
class MonthRange {
/**
* @param {number} range - Range of months.
* @param {string} language - Language code.
* @param {string} hemisphere - Hemisphere.
* @param {Date} startDate - Start date.
* @param {Date} endDate - End date.
* @returns {object} - Object with month details.
* @example const monthRange = new MonthRange(4); // const monthRange = new MonthRange(4, 'en-GB', 'southern');
*/
constructor(range = 0, language = 'de-DE', hemisphere = 'northern', startDate = new Date(), endDate = new Date('2020-12-31')) {
this.range = range;
this.startDate = startDate;
this.endDate = endDate;
this.language = language;
this.hemisphere = hemisphere;
this.translations = JSON.parse(fs.readFileSync('translations.json'))[language];
}
getRelativeDate(date) {
const diffInDays = Math.round((this.startDate - date) / (1000 * 60 * 60 * 24));
const isCurrentMonth = this.startDate.getMonth() === date.getMonth() && this.startDate.getFullYear() === date.getFullYear();
if (isCurrentMonth) return this.translations.relativeDates.thisMonth;
if (diffInDays < 30) return this.translations.relativeDates.daysAgo.replace('{days}', diffInDays);
if (diffInDays < 60) return this.translations.relativeDates.lastMonth;
return this.translations.relativeDates.monthsAgo.replace('{months}', Math.round(diffInDays / 30));
}
generateMonths() {
const result = [];
for (let i = 0; i < this.range; i++) {
const completeMonth = new Date(this.startDate.getFullYear(), this.startDate.getMonth() - i);
const sortDate = new Date(completeMonth.getFullYear(), completeMonth.getMonth() + 1); // Create a copy for sorting
if (completeMonth > this.endDate) {
const firstDay = `${completeMonth.getFullYear()}-${String(completeMonth.getMonth() + 1).padStart(2, '0')}-01`;
const lastDay = new Date(Date.UTC(completeMonth.getFullYear(), completeMonth.getMonth() + 1, 0)).toISOString().slice(0, 10);
const currentMonthName = new Intl.DateTimeFormat(this.language, { month: 'long' }).format(completeMonth);
const totalDays = (new Date(completeMonth.getFullYear(), completeMonth.getMonth() + 1, 0)).getDate();
const firstDayName = new Intl.DateTimeFormat(this.language, { weekday: 'long' }).format(new Date(firstDay));
const lastDayName = new Intl.DateTimeFormat(this.language, { weekday: 'long' }).format(new Date(lastDay));
// Determine the season (Northern Hemisphere)
const season = this.getSeason(completeMonth);
// Calculate the number of weekends
const weekendDays = this.getWeekendCount(completeMonth);
const weekendPairs = this.getWeekendCount(completeMonth) / 2;
result.push({
sortDate: sortDate,
month: currentMonthName.charAt(0).toUpperCase() + currentMonthName.slice(1),
year: completeMonth.getFullYear(),
days: { first: firstDay, last: lastDay, today: this.startDate.toISOString().slice(0, 10), totalDays, firstDayName, lastDayName },
relativeDate: this.getRelativeDate(completeMonth),
season,
weekendDays,
weekendPairs,
isLeapYear: (completeMonth.getFullYear() % 4 === 0 && (completeMonth.getFullYear() % 100 !== 0 || completeMonth.getFullYear() % 400 === 0))
});
}
}
return result;
}
getSeason(date) {
const month = date.getMonth();
if (this.hemisphere === 'northern') {
// Determine the season in English
let season = "Winter";
if (month < 2 || month === 11) season = 'Winter';
if (month < 5) season = 'Spring';
if (month < 8) season = 'Summer';
if (month < 11) season = 'Autumn';
// Translate to the chosen language
return this.translations.seasons[season];
} else {
// Determine the season in English
let season = "Spring";
if (month < 2 || month === 11) season = 'Summer';
if (month < 5) season = 'Autumn';
if (month < 8) season = 'Winter';
// Translate to the chosen language
return this.translations.seasons[season];
}
}
getWeekendCount(date) {
let count = 0;
for (let i = 1; i <= (new Date(date.getFullYear(), date.getMonth() + 1, 0)).getDate(); i++) {
const dayOfWeek = new Date(date.getFullYear(), date.getMonth(), i).getDay();
if (dayOfWeek === 0 || dayOfWeek === 6) count++;
}
return count;
}
getMonthDetails(targetDate) {
const completeMonth = targetDate;
const firstDay = `${completeMonth.getFullYear()}-${String(completeMonth.getMonth() + 1).padStart(2, '0')}-01`;
const lastDay = new Date(Date.UTC(completeMonth.getFullYear(), completeMonth.getMonth() + 1, 0)).toISOString().slice(0, 10);
const currentMonthName = new Intl.DateTimeFormat(this.language, { month: 'long' }).format(completeMonth);
const totalDays = (new Date(completeMonth.getFullYear(), completeMonth.getMonth() + 1, 0)).getDate();
const firstDayName = new Intl.DateTimeFormat(this.language, { weekday: 'long' }).format(new Date(firstDay));
const lastDayName = new Intl.DateTimeFormat(this.language, { weekday: 'long' }).format(new Date(lastDay));
const season = this.getSeason(completeMonth);
const weekendDays = this.getWeekendCount(completeMonth);
const weekendPairs = this.getWeekendCount(completeMonth) / 2;
return {
sortDate: completeMonth,
month: currentMonthName.charAt(0).toUpperCase() + currentMonthName.slice(1),
year: completeMonth.getFullYear(),
days: { first: firstDay, last: lastDay, today: this.startDate.toISOString().slice(0, 10), totalDays, firstDayName, lastDayName },
relativeDate: this.getRelativeDate(completeMonth),
season,
weekendDays,
weekendPairs,
isLeapYear: (completeMonth.getFullYear() % 4 === 0 && (completeMonth.getFullYear() % 100 !== 0 || completeMonth.getFullYear() % 400 === 0))
};
}
}
const monthRange = new MonthRange(4);
// const monthRange = new MonthRange(4, 'en-GB', 'southern'); // englische version
const months = monthRange.generateMonths();
console.log(months);
const specificDateDetails = monthRange.getMonthDetails(new Date('2023-08-02'));
console.log("\nDETAILS\n=======");
console.log(specificDateDetails);
const languageFile = JSON.parse(fs.readFileSync('translations.json'));
const keys = Object.keys(languageFile);
console.log("\nPOSSIBLE LANGUAGES\n==================");
console.log(keys);
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