@devexperts/dxcharts-lite
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JavaScript
/*
* Copyright (C) 2019 - 2025 Devexperts Solutions IE Limited
* This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
* If a copy of the MPL was not distributed with this file, You can obtain one at https://mozilla.org/MPL/2.0/.
*/
import { eachDayOfInterval, isSameDay, isMonday, isTuesday, isWednesday, isThursday, isFriday, isSaturday, isSunday, startOfMonth, endOfMonth, } from 'date-fns';
/**
* Factory that return a {@link TimeFormatMatcher} function for a given {@link ParsedTimeFormats}
* @see
* Detailed explanation you can find here {@link TimeFormatMatcher}
*/
export const timeFormatMatcherFactory = (timeFormat) => {
switch (timeFormat.key) {
case 'lessThanSecond':
return lessThanSecondMatcherFactory(timeFormat);
case 'month':
return monthMatcherFactory(timeFormat);
case 'second':
case 'minute':
case 'hour':
case 'day':
case 'year':
return commonMatcherFactory(timeFormat);
case 'week-weekday':
return weekWeekdayMatcherFactory(timeFormat);
default:
return () => false;
}
};
/**
* Returns a `number` for a given {@link Date} and {@link TimeFormat}
* @example
* const date = new Date('Fri Feb 14 2023 14:50:10 GMT+0500');
* const timeFormat: TimeFormat = 'day';
* // `getTimeFromDateByTimeFormat` will return days from given date and it will be 14, because `Feb 14`
* const days = getTimeFromDateByTimeFormat(date, timeFormat); // 14
*/
const getTimeFromDateByTimeFormat = (date, timeFormat) => {
switch (timeFormat) {
case 'lessThanSecond':
return date.getMilliseconds();
case 'month':
return date.getMonth();
case 'second':
return date.getSeconds();
case 'minute':
return date.getMinutes();
case 'hour':
return date.getHours();
case 'day':
return date.getDate();
case 'year':
return date.getFullYear();
case 'week-weekday':
return date.getDate();
}
};
/**
* Checks if the given dates are not the same for a given {@link TimeFormat}
* @example
* const date1 = new Date('Fri Feb 10 2023 14:50:10 GMT+0500');
* const date2 = new Date('Fri Feb 09 2023 14:50:10 GMT+0500');
* const timeFormat: TimeFormat = 'day';
* // `true` because it takes days from `Feb 10` and `Feb 09`, and 10 !== 9
* const notTheSame = datesNOTtheSame(timeFormat)(date1, date2); // true
*
*/
const datesNOTtheSame = (key) => (currentDate, prevDate) => {
const currentTime = getTimeFromDateByTimeFormat(currentDate, key);
const prevTime = getTimeFromDateByTimeFormat(prevDate, key);
return currentTime !== prevTime;
};
/**
* Checks if the given dates are are bigger or equal for a given {@link TimeFormat}
* @example
* const date1 = new Date('Fri Feb 10 2023 14:50:10 GMT+0500');
* const date2 = new Date('Fri Feb 10 2023 14:50:10 GMT+0500');
* const timeFormat: TimeFormat = 'day';
* // `true` because it takes days from `Feb 10` and `Feb 10`, and 10 === 10
* const areTheSame = datesAreTheSame(timeFormat)(date1, date2); // true
*/
const datesBiggerOrEqual = (key) => (currentDate, prevDate) => {
const currentTime = getTimeFromDateByTimeFormat(currentDate, key);
const prevTime = getTimeFromDateByTimeFormat(prevDate, key);
return currentTime >= prevTime;
};
//#region TimeFormat matchers
const weekdayCheckDict = {
1: isMonday,
2: isTuesday,
3: isWednesday,
4: isThursday,
5: isFriday,
6: isSaturday,
7: isSunday,
};
/**
* Checks if the given {@link Date} matches with `weekMatchValue` and `weekdayMatchValue`
* @example
* const date = new Date('Fri Feb 10 2023 14:50:10 GMT+0500');
* // '$' means last week of the month
* const weekMatchValue = '$';
* // 5 means Friday
* const weekdayMatchValue = 5;
* // to sum up '$' and 5 means `last Friday in month`
*
* // false, because `Feb 10` is 2nd Friday in Feb 2023
* const match = weekWeekdayMatch(date, weekMatchValue, weekdayMatchValue); // false
*
* @example
* const date = new Date('Tue Feb 7 2023 14:50:10 GMT+0500');
* // 1 means first week of the month
* const weekMatchValue = 1;
* // 2 means Tuesday
* const weekdayMatchValue = 2;
* // to sum up 1 and 2 means `first Tuesday in month`
*
* // true, but there's a tricky part:
* // Feb 2023 doesn't have a Tuesday on the first week, so for such cases
* // match function will take the next week, and search Tuesday on it.
* // Therefore weekMatchValue becomes 2, and 2nd weeks' Tuesday in Feb 2023 is Feb 7
* const match = weekWeekdayMatch(date, weekMatchValue, weekdayMatchValue); // true
*/
const weekWeekdayMatch = (date, weekMatchValue, weekdayMatchValue) => {
var _a;
const fullMonthInterval = eachDayOfInterval({
start: startOfMonth(date),
end: endOfMonth(date),
});
const weekdayCheckFn = (_a = weekdayCheckDict[weekdayMatchValue]) !== null && _a !== void 0 ? _a : (() => false);
if (weekMatchValue === '$') {
for (const dateOfInterval of fullMonthInterval.reverse()) {
if (weekdayCheckFn(dateOfInterval)) {
return isSameDay(date, dateOfInterval);
}
}
}
else {
let week = 1;
for (const dateOfInterval of fullMonthInterval) {
if (weekdayCheckFn(dateOfInterval)) {
if (week === weekMatchValue) {
return isSameDay(date, dateOfInterval);
}
else {
week++;
}
}
}
}
return false;
};
/**
* Checks if the given `value` and `matchValue` match exactly
* @example
* const match = exactMatch(10, 10); // true
* const match = exactMatch(10, 5); // false
**/
const exactMatch = (value, matchValue) => {
return matchValue === 1 ? value === 1 : value / matchValue === 1;
};
/**
* Checks if the given `value` is divisible by `matchValue`
* const match = looseMatch(10, 5); // true
* const match = looseMatch(11, 5); // false
*/
const looseMatch = (value, matchValue) => {
return matchValue === 1 ? true : value % matchValue === 0;
};
//#endregion TimeFormat matchers
//#region TimeFormat matchers factories
const lessThanSecondMatcherFactory = (timeFormat) => (currentDate, prevDate) => datesBiggerOrEqual(timeFormat.key)(currentDate, prevDate);
const monthMatcherFactory = (timeFormat) => (currentDate, prevDate) => {
const datesNotMatch = datesNOTtheSame(timeFormat.key)(currentDate, prevDate);
const valueMatch = timeFormat.exact
? exactMatch(getTimeFromDateByTimeFormat(currentDate, timeFormat.key) + 1, timeFormat.value)
: looseMatch(getTimeFromDateByTimeFormat(currentDate, timeFormat.key) + 1, timeFormat.value);
return datesNotMatch && valueMatch;
};
const commonMatcherFactory = (timeFormat) => (currentDate, prevDate) => {
const datesNotMatch = datesNOTtheSame(timeFormat.key)(currentDate, prevDate);
const valueMatch = timeFormat.exact
? exactMatch(getTimeFromDateByTimeFormat(currentDate, timeFormat.key), timeFormat.value)
: looseMatch(getTimeFromDateByTimeFormat(currentDate, timeFormat.key), timeFormat.value);
return datesNotMatch && valueMatch;
};
const weekWeekdayMatcherFactory = (timeFormat) => (currentDate, prevDate) => {
const datesNotMatch = datesNOTtheSame(timeFormat.key)(currentDate, prevDate);
const valueMatch = weekWeekdayMatch(currentDate, timeFormat.week, timeFormat.weekday);
return datesNotMatch && valueMatch;
};
//#endregion TimeFormat matchers factories