/**
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* calendar.js
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*
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*/
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/**
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* 1 → Januar, 2 → Februar, ... , 12 → Dezember
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*
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* 0 → Sontag, 1 → Montag, ..., 6 → Samstag
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* */
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import {terminal} from "./dfhi.js";
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let Calendar = {
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months: [undefined,
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"JAN", "FEB", "MÄR", "APR",
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"MAI", "JUN", "JUL", "AUG",
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"SEP", "OKT", "NOV", "DEZ"],
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days: ["SO","MO", "DI", "MI", "DO", "FR", "SA"],
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daysInMonth : [undefined,
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31, 28, 31, 40,
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31, 30, 31, 31,
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30, 31, 30, 31
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],
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firstDay: 1,
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// current date
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date: 1,
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month: 1,
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year: 2021,
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toString: function() {
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return `${this.date}. ${this.month}. ${this.year}`;
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},
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showCalendar: function() {
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let title = `<span class="calendar-title">${this.months[this.month]} ${this.year}</span><br/>\n`;
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let table = `${title}<table><tr>\n`
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// print header
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for(let i = 0; i < this.days.length; ++i) {
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let nameOfDay = this.days[(i+this.firstDay)%7];
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table += `<th>${nameOfDay}</th>`;
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}
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table += "</tr>\n"
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// print (empty) days of last month
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let firstDateOfMonth = new Date(this.year, this.month-1, 1);
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let dayOfFirstDate = firstDateOfMonth.getDay();
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let diff = dayOfFirstDate - this.firstDay;
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let space = "",
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countSpace = diff;
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while(countSpace > 0) {
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--countSpace;
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space += "<td> </td>"
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}
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let firstWeek = "";
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let d = 1;
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for (; d + diff <= 7; d++) {
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firstWeek += `<td>${d}</td>`
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}
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table += `<tr>${space}${firstWeek}</tr>`;
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// append weeks to table
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let week = "";
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let lastDateOfMonth = this.daysInMonth[this.month];
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if (isLeapYear(this.year)) {
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lastDateOfMonth = 29;
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}
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for(;d <= lastDateOfMonth; ++d) {
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week += `<td>${d}</td>`;
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if ( (d + diff) % 7 === 0 ) {
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table += `<tr>${week}</tr>\n`;
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week = "";
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}
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}
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if (week !== "") {
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table += `<tr>${week}</tr>\n`;
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}
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return table;
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},
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};
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function isLeapYear(year) {
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let leapYear = (year % 4 === 0);
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leapYear = leapYear && (year % 100 !== 0);
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leapYear = leapYear || (year % 400 === 0);
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return leapYear;
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}
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window.main = function(...argv) {
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let month = Number.parseInt(argv[0]);
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let year = Number.parseInt( argv[1] || 2021 );
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Calendar.month = month;
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Calendar.year = year;
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let cal = Calendar.showCalendar();
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terminal.printh(cal);
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};
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