diff --git a/docs/bikram.js b/docs/bikram.js index 695ee24..daee1fa 100644 --- a/docs/bikram.js +++ b/docs/bikram.js @@ -1,187 +1,73 @@ - - // JavaScript class and functions for date conversion - // Based on bikram.h from github.com/khumnath/nepdate - // Author khumnath cg - // Licence gpl v3 or higher - class Bikram { - constructor() { - this.Year = 0; - this.Month = 0; - this.Day = 0; - - this.YugaRotation_star = 1582237828; - this.YugaRotation_sun = 4320000; - this.YugaCivilDays = this.YugaRotation_star - this.YugaRotation_sun; - this.PlanetApogee_sun = 77 + 17 / 60; - this.PlanetCircumm_sun = 13 + 50 / 60; - this.rad = 57.2957795; // = 180/pi - } - - getSauraMasaDay(ahar) { - let tslong_tomorrow; - let month; - let day; - if (this.todaySauraMasaFirstP(ahar)) { - day = 1; - tslong_tomorrow = this.getTslong(ahar + 1); - month = Math.floor(tslong_tomorrow / 30) % 12; - month = (month + 12) % 12; - } else { - [month, day] = this.getSauraMasaDay(ahar - 1); - day = day + 1; - } - return [month, day]; - } - - todaySauraMasaFirstP(ahar) { - let tslong_today = this.getTslong(ahar); - let tslong_tomorrow = this.getTslong(ahar + 1); - tslong_today = tslong_today - Math.floor(tslong_today / 30) * 30; - tslong_tomorrow = tslong_tomorrow - Math.floor(tslong_tomorrow / 30) * 30; - return (25 < tslong_today) && (tslong_tomorrow < 5); - } - - getTslong(ahar) { - let mslong; - let t1 = (this.YugaRotation_sun * ahar / this.YugaCivilDays) % 1; - mslong = 360 * t1; - let x1 = mslong - this.PlanetApogee_sun; - let y1 = this.PlanetCircumm_sun / 360; - let y2 = Math.sin(x1 / this.rad); - let y3 = y1 * y2; - let x2 = Math.asin(y3) * this.rad; - let x3 = mslong - x2; - return x3; - } - - getJulianDate(year, month, day) { - if (month <= 2) { - year -= 1; - month += 12; - } - let a = Math.floor(year / 100.0); - let b = 2 - a + Math.floor(a / 4.0); - return Math.floor(365.25 * (year + 4716)) + Math.floor(30.6001 * (month + 1)) + day + b - 1524.5; - } - - fromJulianDate(julian_date) { - let a = Math.floor(julian_date + 0.5); - let b = a + 1537; - let c = Math.floor((b - 122.1) / 365.25); - let d = Math.floor(365.25 * c); - let e = Math.floor((b - d) / 30.6001); - let f = b - d - Math.floor(30.6001 * e) + (julian_date + 0.5 - a); - let day = Math.floor(f); - let month; - let year; - if (e < 14) { - month = e - 1; - } else { - month = e - 13; - } - if (month > 2) { - year = c - 4716; - } else { - year = c - 4715; - } - return { year, month, day }; - } - - // Public method to convert Gregorian to Bikram Sambat - fromGregorian(y, m, d) { - let julian = this.getJulianDate(y, m, d); - let ahar = julian - 588465.5; - let [saura_masa_num, saura_masa_day] = this.getSauraMasaDay(ahar); - let YearKali = Math.floor((ahar * this.YugaRotation_sun) / this.YugaCivilDays); - let YearSaka = YearKali - 3179; - let nepalimonth = saura_masa_num % 12; - this.Year = YearSaka + 135 + Math.floor((saura_masa_num - nepalimonth) / 12); - this.Month = (saura_masa_num +1 ) % 12; - this.Day = saura_masa_day +1 ; - } - - // Public method to convert Bikram Sambat to Gregorian - toGregorian(bsYear, bsMonth, bsDay) { - let YearSaka = bsYear - 135; - let YearKali = YearSaka + 3179; - let ahar = Math.floor((YearKali * this.YugaCivilDays) / this.YugaRotation_sun); - let [saura_masa_num, saura_masa_day] = this.getSauraMasaDay(ahar); - bsMonth = (bsMonth + 11) % 12; // Month is 0 indexed so last month 11 - while (saura_masa_num !== bsMonth || saura_masa_day !== bsDay) { - if (saura_masa_num < bsMonth || (saura_masa_num === bsMonth && saura_masa_day < bsDay)) { - ahar++; - } else { - ahar--; - } - [saura_masa_num, saura_masa_day] = this.getSauraMasaDay(ahar); - } - let julian_date = ahar + 588465.5; - return this.fromJulianDate(julian_date); - } - - fromNepali(bsYear, bsMonth, bsDay) { - let { year, month, day } = this.toGregorian(bsYear, bsMonth, bsDay); - this.Year = year; - this.Month = month; - this.Day = day +1; // Day Index Starts from 0, This is same as this.Day = saura_masa_day +1 ; - } - - getDayOfWeek() { - let date = new Date(this.Year, this.Month - 1, this.Day); - return date.getDay(); - } - - getYear() { - return this.Year; - } - - getMonth() { - return (this.Month + 12) % 12 || 12; -} - - - getDay() { - return this.Day -1; - } -getNepaliWeekdayName() { - const weekdayNepali = ["आइतबार", "सोमबार", "मङ्गलबार", "बुधबार", "बिहिबार", "शुक्रबार", "शनिबार"]; - let weekdayIndex = this.getDayOfWeek(); // Using existing getDayOfWeek method - return weekdayNepali[weekdayIndex]; - } - - getWeekdayName(year, month, day) { - let date = new Date(year, month - 1, day); - const weekday = ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"]; - return weekday[date.getDay()]; - } -getBikramMonthName() { - const bsMonths = [ - { value: 1, name: 'बैशाख' }, { value: 2, name: 'जेठ' }, { value: 3, name: 'असार' }, - { value: 4, name: 'साउन' }, { value: 5, name: 'भदौ' }, { value: 6, name: 'असोज' }, - { value: 7, name: 'कार्तिक' }, { value: 8, name: 'मंसिर' }, { value: 9, name: 'पुष' }, - { value: 10, name: 'माघ' }, { value: 11, name: 'फाल्गुन' }, { value: 12, name: 'चैत' } - ]; - return bsMonths[this.getMonth() - 1].name; -} - -getGregorianMonthName() { - const gregorianMonths = [ - { value: 1, name: 'January' }, { value: 2, name: 'February' }, { value: 3, name: 'March' }, - { value: 4, name: 'April' }, { value: 5, name: 'May' }, { value: 6, name: 'June' }, - { value: 7, name: 'July' }, { value: 8, name: 'August' }, { value: 9, name: 'September' }, - { value: 10, name: 'October' }, { value: 11, name: 'November' }, { value: 12, name: 'December' } - ]; - return gregorianMonths[this.getMonth() - 1].name; - } - - // Method to get Nepali day name for Gregorian date - getGregorianDayName(year, month, day) { - let date = new Date(year, month, day); - const weekdayNepali = ["sunday", "monday", "tuesday", "wednesday", "thursday", "friday", "saturday"]; - return weekdayNepali[date.getDay()]; - } - - daysInMonth(bsYear, bsMonth) { + class Bikram { + constructor() { + this.Year = 0; + this.Month = -1; + this.Day = 0; + this.YugaRotation_star = 1582237828; + this.YugaRotation_sun = 4320000; + this.YugaCivilDays = this.YugaRotation_star - this.YugaRotation_sun; + this.PlanetApogee_sun = 77 + (17 / 60); + this.PlanetCircumm_sun = 13 + (50 / 60); + this.rad = 57.2957795; // = 180/pi + } + + getJulianDate(year, month, day) { + if (month <= 2) { + year -= 1; + month += 12; + } + const a = Math.floor(year / 100); + const b = 2 - a + Math.floor(a / 4); + return Math.floor(365.25 * (year + 4716)) + Math.floor(30.6001 * (month + 1)) + day + b - 1524.5; + } + + fromJulianDate(julian_date) { + const a = Math.floor(julian_date + 0.5); + const b = a + 1537; + const c = Math.floor((b - 122.1) / 365.25); + const d = Math.floor(365.25 * c); + const e = Math.floor((b - d) / 30.6001); + const f = b - d - Math.floor(30.6001 * e) + (julian_date + 0.5 - a); + const day = Math.floor(f); + const month = e < 14 ? e - 1 : e - 13; + const year = month > 2 ? c - 4716 : c - 4715; + return { year, month, day }; + } + + getSauraMasaDay(ahar) { + let month , day; + if (this.todaySauraMasaFirstP(ahar)) { + day = 1; + const tslong_tomorrow = this.getTslong(ahar + 1); + month = (Math.floor(tslong_tomorrow / 30) % 12 + 12) % 12; + } else { + const previous = this.getSauraMasaDay(ahar - 1); + day = previous.day + 1; + month = previous.month; + } + return { month, day }; + } + + todaySauraMasaFirstP(ahar) { + const tslong_today = this.getTslong(ahar); + const tslong_tomorrow = this.getTslong(ahar + 1); + const today_mod = tslong_today - Math.floor(tslong_today / 30) * 30; + const tomorrow_mod = tslong_tomorrow - Math.floor(tslong_tomorrow / 30) * 30; + return (25 < today_mod && tomorrow_mod < 5) ? 1 : 0; + } + + getTslong(ahar) { + const t1 = (this.YugaRotation_sun * ahar / this.YugaCivilDays) % 1; + const mslong = 360 * t1; + const x1 = mslong - this.PlanetApogee_sun; + const y1 = this.PlanetCircumm_sun / 360; + const y2 = Math.sin(x1 / this.rad); + const y3 = y1 * y2; + const x2 = Math.asin(y3) * this.rad; + return mslong - x2; + } + + daysInMonth(bsYear, bsMonth) { let { year: gYear, month: gMonth, day: gDay } = this.toGregorian(bsYear, bsMonth, 1); let julian_date_start = this.getJulianDate(gYear, gMonth, gDay); let nextMonth = (bsMonth % 12) + 1; @@ -191,126 +77,75 @@ getGregorianMonthName() { return Math.floor(julian_date_end - julian_date_start); } - daysInGregorianMonth(gYear, gMonth) { - const daysInMonth = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]; - if (gMonth === 2 && ((gYear % 4 === 0 && gYear % 100 !== 0) || (gYear % 400 === 0))) { - return 29; - } - return daysInMonth[gMonth - 1]; - } + fromGregorian(y, m, d) { + const julian = this.getJulianDate(y, m, d); + const ahar = julian - 588465.5; + const { month: saura_masa_num, day: saura_masa_day } = this.getSauraMasaDay(ahar); + const YearKali = Math.floor(ahar * this.YugaRotation_sun / this.YugaCivilDays); + const YearSaka = YearKali - 3179; + const nepalimonth = saura_masa_num % 12; + this.Year = YearSaka + 135 + Math.floor((saura_masa_num - nepalimonth) / 12); + this.Month = (saura_masa_num + 12) % 12; + this.Day = saura_masa_day; + } + + toGregorian(bsYear, bsMonth, bsDay) { + const YearSaka = bsYear - 135; + const YearKali = YearSaka + 3179; + let ahar = Math.floor((YearKali * this.YugaCivilDays) / this.YugaRotation_sun); + let { month: saura_masa_num, day: saura_masa_day } = this.getSauraMasaDay(ahar); + bsMonth = (bsMonth + 11) % 12; + + while (saura_masa_num !== bsMonth || saura_masa_day !== bsDay) { + ahar += (saura_masa_num < bsMonth || (saura_masa_num === bsMonth && saura_masa_day < bsDay)) ? 1 : -1; + ({ month: saura_masa_num, day: saura_masa_day } = this.getSauraMasaDay(ahar)); + } + + const julian_date = ahar + 588465.5; + return this.fromJulianDate(julian_date); + } + + fromNepali(bsYear, bsMonth, bsDay) { + const { year, month, day } = this.toGregorian(bsYear, bsMonth, bsDay); + this.Year = year; + this.Month = month - 1; // Adjust for 0-based month + this.Day = day; + } + + getYear() { + return this.Year; + } + + getMonth() { + return this.Month + 1; // Return 1-based month + } + + getDay() { + return this.Day; + } + + getWeekdayName(year, month, day) { + const days = ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"]; + const nepaliDays = ["आइतबार", "सोमबार", "मंगलबार", "बुधबार", "बिहीबार", "शुक्रबार", "शनिबार"]; + const timeinfo = new Date(year, month - 1, day); + const weekdayIndex = timeinfo.getDay(); + return document.getElementById("language").value === "nepali" ? nepaliDays[weekdayIndex] : days[weekdayIndex]; + } + + getMonthName(month) { + const englishMonths = ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"]; + const gregorianMonthsInNepali = ["जनवरी", "फेब्रुअरी", "मार्च", "अप्रिल", "मे", "जुन", "जुलाई", "अगस्ट", "सेप्टेम्बर", "अक्टोबर", "नोभेम्बर", "डिसेम्बर"]; + const romanizedNepaliMonths = ["Baishakh", "Jestha", "Ashadh", "Shravan", "Bhadra", "Ashwin", "Kartik", "Mangsir", "Poush", "Magh", "Falgun", "Chaitra"]; + const nepaliMonths = ["बैसाख", "जेष्ठ", "आषाढ", "श्रावण", "भाद्र", "आश्विन", "कार्तिक", "मंसिर", "पौष", "माघ", "फागुन", "चैत"]; + + const language = document.getElementById("language").value; + + if (language === "nepali") { + // Use the Nepali month index for Bikram Sambat + return nepaliMonths[month - 1]; // month is 1-based + } else { + // Use the Romanized month names for English + return romanizedNepaliMonths[month - 1]; // month is 1-based } - - // Initialize Bikram calendar object - const bikram = new Bikram(); - - // Function to update Gregorian date to Bikram Sambat -function updateBikramDate() { - let gYear = parseInt(document.getElementById('gYear').value); - let gMonth = parseInt(document.getElementById('gMonth').value); - let gDay = parseInt(document.getElementById('gDay').value); - - bikram.fromGregorian(gYear, gMonth, gDay); - - document.getElementById('bikramYear').textContent = convertToNepaliDigits(bikram.getYear()); - document.getElementById('bikramMonth').textContent = bikram.getBikramMonthName(); - document.getElementById('bikramDay').textContent = convertToNepaliDigits(bikram.getDay()); -} - -// Function to update Bikram Sambat date to Gregorian -function updateGregorianDate() { - let bsYear = parseInt(document.getElementById('bsYear').value); - let bsMonth = parseInt(document.getElementById('bsMonth').value); - let bsDay = parseInt(document.getElementById('bsDay').value); - - bikram.fromNepali(bsYear, bsMonth, bsDay); - - document.getElementById('gYearResult').textContent = bikram.getYear(); - document.getElementById('gMonthResult').textContent = bikram.getGregorianMonthName(); - document.getElementById('gDayResult').textContent = bikram.getDay(); } - - - // Populate dropdowns with years, months, and days - document.addEventListener('DOMContentLoaded', function () { - // For Gregorian to Bikram Sambat - let gYearSelect = document.getElementById('gYear'); - let gMonthSelect = document.getElementById('gMonth'); - let gDaySelect = document.getElementById('gDay'); - - // For Bikram Sambat to Gregorian - let bsYearSelect = document.getElementById('bsYear'); - let bsMonthSelect = document.getElementById('bsMonth'); - let bsDaySelect = document.getElementById('bsDay'); - - // Fill years (Gregorian) - for (let year = 1800; year <= new Date().getFullYear() + 200; year++) { - let gOption = document.createElement('option'); - gOption.value = year; - gOption.textContent = year; - gYearSelect.appendChild(gOption); - - let bsOption = document.createElement('option'); - bsOption.value = year + 56; // Adjusting BS Year - bsOption.textContent = convertToNepaliDigits(year + 56); - bsYearSelect.appendChild(bsOption); - } - - // Fill months (Gregorian) - const months = [ - { value: 1, name: 'January' }, { value: 2, name: 'February' }, { value: 3, name: 'March' }, - { value: 4, name: 'April' }, { value: 5, name: 'May' }, { value: 6, name: 'June' }, - { value: 7, name: 'July' }, { value: 8, name: 'August' }, { value: 9, name: 'September' }, - { value: 10, name: 'October' }, { value: 11, name: 'November' }, { value: 12, name: 'December' } - ]; - - for (let month of months) { - let gOption = document.createElement('option'); - gOption.value = month.value; - gOption.textContent = month.name; - gMonthSelect.appendChild(gOption); - } - - // Fill days (Gregorian and Bikram Sambat) - for (let day = 1; day <= 31; day++) { - let gOption = document.createElement('option'); - gOption.value = day; - gOption.textContent = day; - gDaySelect.appendChild(gOption); - - let bsOption = document.createElement('option'); - bsOption.value = day; - bsOption.textContent = convertToNepaliDigits(day); - bsDaySelect.appendChild(bsOption); - } - - // Fill months (Bikram Sambat) - const bsMonths = [ - { value: 1, name: 'बैशाख' }, { value: 2, name: 'जेठ' }, { value: 3, name: 'असार' }, - { value: 4, name: 'साउन' }, { value: 5, name: 'भदौ' }, { value: 6, name: 'असोज' }, - { value: 7, name: 'कार्तिक' }, { value: 8, name: 'मंसिर' }, { value: 9, name: 'पुष' }, - { value: 10, name: 'माघ' }, { value: 11, name: 'फाल्गुन' }, { value: 12, name: 'चैत' } -]; - - - for (let month of bsMonths) { - let bsOption = document.createElement('option'); - bsOption.value = month.value; - bsOption.textContent = month.name; - bsMonthSelect.appendChild(bsOption); - } - - - // Set initial date to today - const today = new Date(); - document.getElementById('gYear').value = today.getFullYear(); - document.getElementById('gMonth').value = today.getMonth() + 1; - document.getElementById('gDay').value = today.getDate(); - updateBikramDate(); - - // Set initial BS date to today - bikram.fromGregorian(today.getFullYear(), today.getMonth() + 1, today.getDate()); - document.getElementById('bsYear').value = bikram.getYear(); - document.getElementById('bsMonth').value = bikram.getMonth(); - document.getElementById('bsDay').value = bikram.getDay(); - updateGregorianDate(); - }); \ No newline at end of file + } diff --git a/docs/index.html b/docs/index.html index 7a07608..f034f57 100644 --- a/docs/index.html +++ b/docs/index.html @@ -1,402 +1,370 @@ - - - Date Converter: Gregorian <-> Bikram Sambat - - - - - + -
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Nepali Date Converter

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Gregorian to Bikram Sambat
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विक्रम सम्बत् : गते

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Date Converter

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calendar is still not working

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Bikram Sambat Calendar

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Gregorian to Bikram Sambat

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आइतसोममङ्गलबुधबिहिशुक्रशनि
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- + function updateDropdowns(gMonths, bsMonths) { + const gMonthSelect = document.getElementById("gMonth"); + const bsMonthSelect = document.getElementById("bsMonth"); + // Clear existing options + gMonthSelect.innerHTML = ''; + bsMonthSelect.innerHTML = ''; + // Populate Gregorian months + gMonths.forEach((month, index) => { + const option = document.createElement("option"); + option.value = index + 1; // Month value starts from 1 + option.text = month; + gMonthSelect.appendChild(option); + }); + // Populate Bikram Sambat months + bsMonths.forEach((month, index) => { + const option = document.createElement("option"); + option.value = index + 1; // Month value starts from 1 + option.text = month; + bsMonthSelect.appendChild(option); + }); + } - + // Display the result + document.getElementById("bikramResult").innerText = `${bikramYear} ${bikramMonthName} ${bikramDay} ${weekdayName} (${pakshaDisplay}, ${tithiDisplay})`; +} + function convertToGregorian() { + const bsYear = parseInt(document.getElementById("bsYear").value); + const bsMonth = parseInt(document.getElementById("bsMonth").value); + const bsDay = parseInt(document.getElementById("bsDay").value); + + const bikram = new Bikram(); + bikram.fromNepali(bsYear, bsMonth, bsDay); + const gYear = bikram.getYear(); + const gMonth = bikram.getMonth(); // Get the month number (1-based) + const gDay = bikram.getDay(); + + // Get the correct month name for the Gregorian date + const language = document.getElementById("language").value; + const gMonthName = language === "nepali" ? + translations.nepali.gMonths[gMonth - 1] : + translations.english.gMonths[gMonth - 1]; + + const weekdayName = bikram.getWeekdayName(gYear, gMonth, gDay); + document.getElementById("gregorianResult").innerText = ` ${gYear} ${gMonthName} ${gDay} ${weekdayName}`; +} + - + \ No newline at end of file diff --git a/docs/tithi.js b/docs/tithi.js index abc0e80..35e8143 100644 --- a/docs/tithi.js +++ b/docs/tithi.js @@ -2,7 +2,7 @@ function calculateTithi(year, month, day) { const tdays = calculateDaysSinceJ2000(year, month, day); const tithiIndex = calculateTithiIndex(tdays); return { - tithi: getTithiName(tithiIndex), + tithi: getTithiName(tithiIndex + 1), paksha: getPaksha(tithiIndex) }; }