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95 Weekday - move date functions into DateStruct

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This commit is contained in:
Steve Bosman
2022-02-02 23:11:27 +00:00
parent 6311b6a785
commit 0434ac8fd4
1 changed files with 30 additions and 32 deletions
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62
95_Weekday/javascript/weekday.js
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@@ -51,6 +51,34 @@ class DateStruct {
this.month = month;
this.day = day;
}
/**
* Determine if the date could be a Gregorian date.
* Be aware the Gregorian calendar was not introduced in all places at once,
* see https://en.wikipedia.org/wiki/Gregorian_calendar
* @returns {boolean} true if date could be Gregorian; otherwise false.
*/
isGregorianDate() {
let result = false;
if (this.year > 1582) {
result = true;
} else if (this.year === 1582) {
if (this.month > 10) {
result = true;
} else if (this.month === 10 && this.day >= 15) {
result = true;
}
}
return result;
}
/**
* Returns a US formatted date, i.e. Month/Day/Year.
* @returns {string}
*/
getFormattedDate() {
return this.month + "/" + this.day + "/" + this.year;
}
}
class Duration {
@@ -88,15 +116,6 @@ async function readDateElements() {
return new DateStruct(year, month, day);
}
/**
* Returns a US formatted date, i.e. Month/Day/Year.
* @param {DateStruct} date
* @returns {string}
*/
function getFormattedDate(date) {
return date.month + "/" + date.day + "/" + date.year;
}
/**
* Calculate years, months and days as factor of days.
* This is a naive calculation which assumes all months are 30 days.
@@ -257,27 +276,6 @@ function difference(date1, date2) {
return new Duration(years, months, days);
}
/**
* Determine if the supplied date could be a Gregorian date.
* Be aware the Gregorian calendar was not introduced in all places at once,
* see https://en.wikipedia.org/wiki/Gregorian_calendar
* @param {DateStruct} date
* @returns {boolean} true if date could be Gregorian; otherwise false.
*/
function isGregorianDate(date) {
let result = false;
if (date.year > 1582) {
result = true;
} else if (date.year === 1582) {
if (date.month > 10) {
result = true;
} else if (date.month === 10 && date.day >= 15) {
result = true;
}
}
return result;
}
// Main control section
async function main() {
print(tab(32) + "WEEKDAY\n");
@@ -296,13 +294,13 @@ async function main() {
const dateOfBirth = await readDateElements();
print("\n");
// Test for date before current calendar.
if (!isGregorianDate(dateOfBirth)) {
if (!dateOfBirth.isGregorianDate()) {
print("NOT PREPARED TO GIVE DAY OF WEEK PRIOR TO X.XV.MDLXXXII.\n");
} else {
const normalisedToday = getNormalisedDay(today);
const normalisedDob = getNormalisedDay(dateOfBirth);
const dateOfBirthText = getFormattedDate(dateOfBirth);
const dateOfBirthText = dateOfBirth.getFormattedDate();
let dayOfWeekText = getDayOfWeekText(dateOfBirth);
if (normalisedToday < normalisedDob) {
print(dateOfBirthText + " WILL BE A " + dayOfWeekText + "\n");