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import { parseISO8601, timeNowFrame } from '../utils/algorithms/time.utils.js'
import { getDurationBetweenTimestamps } from '../utils/algorithms/duration.js'
/** @type {FormatCall} */
const formatAsIs = (text) => text
/** @type {Record<string, Formatter>} */
const baseFormatter = {
'as is': {
format: formatAsIs,
},
number: {
format: (text, locale) => Intl.NumberFormat(locale.baseName).format(Number(text)),
},
date: {
format: (text, locale) => {
const date = isNumeric(text) ? new Date((+text) * 1000) : parseISO8601(text)
return Intl.DateTimeFormat(locale.baseName, defaultDateFormatOptions).format(date)
},
},
datetime: {
format: (text, locale) => {
const date = isNumeric(text) ? new Date((+text) * 1000) : parseISO8601(text)
return Intl.DateTimeFormat(locale.baseName, defaultDateTimeFormatOptions).format(date)
},
},
timestamp: {
format: (text, locale) => {
const date = isNumeric(text) ? new Date(+text) : parseISO8601(text)
return Intl.DateTimeFormat(locale.baseName, timestampFormatOptions).format(date)
},
},
'long date': {
format: (text, locale) => {
const date = isNumeric(text) ? new Date((+text) * 1000) : parseISO8601(text)
return Intl.DateTimeFormat(locale.baseName, longDateFormatOptions).format(date)
},
},
'long datetime': {
format: (text, locale) => {
const date = isNumeric(text) ? new Date((+text) * 1000) : parseISO8601(text)
return Intl.DateTimeFormat(locale.baseName, longDateTimeFormatOptions).format(date)
},
},
}
/** @satisfies {[Intl.RelativeTimeFormatUnit, number][]} */
const durationUnitsEntries = [
['year', 1000 * 60 * 60 * 24 * 365],
['month', 1000 * 60 * 60 * 24 * 365 / 12],
['day', 1000 * 60 * 60 * 24],
['hour', 1000 * 60 * 60],
['minute', 1000 * 60],
['second', 1000],
]
export const durationUnits = Object.freeze(/** @type {const} */(['years', 'months', 'days', 'hours', 'minutes', 'seconds']))
/** @type {Record<string, Formatter>} */
const baseRelativeTimeFormatter = {
'relative time': {
format: (text, locale) => {
const date = isNumeric(text) ? new Date((+text) * 1000) : parseISO8601(text)
return relativeTimeFormat(locale, date.valueOf())
},
},
}
/** @type {Record<string, Formatter>} */
const relativeTimeDurationFormatter = {
'relative time duration': {
format: (text, locale) => {
const date = isNumeric(text) ? new Date((+text) * 1000) : parseISO8601(text)
return relativeTimeDurationFormat(locale, date.valueOf())
},
},
}
/** @type {Record<string, Formatter>} */
const baseInUnitRelativeTimeFormatter = Object.fromEntries(
durationUnitsEntries.map(([unit]) => {
return [`in ${unit}s`, {
format: (text, locale) => {
const date = isNumeric(text) ? new Date((+text) * 1000) : parseISO8601(text)
return relativeTimeFormatInUnit(locale, unit, date.valueOf())
},
}]
})
)
/** @type {Record<string, Formatter>} */
const baseDurationInUnitRelativeTimeFormatter = Object.fromEntries(
durationUnitsEntries.map(([unit]) => {
return [`in ${unit}s`, {
format: (text, locale) => {
const date = isNumeric(text) ? new Date((+text) * 1000) : parseISO8601(text)
return relativeTimeDurationFormatInUnit(locale, unit, date.valueOf())
},
}]
})
)
/** @type {Record<string, Formatter>} */
const baseToUnitRelativeTimeFormatter = Object.fromEntries(
durationUnitsEntries.map(([unit, duration]) => {
return [`to ${unit}s`, {
format: (text, locale) => {
const date = isNumeric(text) ? new Date((+text) * 1000) : parseISO8601(text)
return relativeTimeFormatToUnit(locale, unit, date.valueOf())
},
}]
})
)
const relativeTimeFormatters = (() => {
const result = {
...baseRelativeTimeFormatter,
...relativeTimeDurationFormatter,
}
for (const [baseKey] of Object.entries(baseRelativeTimeFormatter)) {
for (const [unitPostfix, unitParams] of Object.entries(baseInUnitRelativeTimeFormatter)) {
result[`${baseKey} ${unitPostfix}`] = unitParams
}
}
for (const [baseKey] of Object.entries(relativeTimeDurationFormatter)) {
for (const [unitPostfix, unitParams] of Object.entries(baseDurationInUnitRelativeTimeFormatter)) {
result[`${baseKey} ${unitPostfix}`] = unitParams
}
for (const [unitPostfix, unitParams] of Object.entries(baseToUnitRelativeTimeFormatter)) {
result[`${baseKey} ${unitPostfix}`] = unitParams
}
}
return result
})()
/** @type {Intl.DateTimeFormatOptions} */
const defaultDateTimeFormatOptions = {
dateStyle: 'short',
timeStyle: 'medium',
}
/** @type {Intl.DateTimeFormatOptions} */
const defaultDateFormatOptions = {
dateStyle: 'short',
}
/** @type {Intl.DateTimeFormatOptions} */
const timestampFormatOptions = {
year: 'numeric',
month: 'numeric',
day: 'numeric',
hour: 'numeric',
minute: 'numeric',
second: 'numeric',
fractionalSecondDigits: 3,
hour12: false,
}
/** @type {Intl.DateTimeFormatOptions} */
const longDateFormatOptions = {
dateStyle: 'long',
}
/** @type {Intl.DateTimeFormatOptions} */
const longDateTimeFormatOptions = {
dateStyle: 'long',
timeStyle: 'long',
}
/**
* Shows relative time based on locale
* @param {Intl.Locale} locale - target locale
* @param {number} d1 target timestamp
* @param {number} d2 timestamp to compare, if not defined uses current time
* @returns {string} formatted relative time
*/
function relativeTimeFormat (locale, d1, d2 = timeNowFrame()) {
const formatter = new Intl.RelativeTimeFormat(locale.baseName, { numeric: 'auto' })
const duration = getDurationBetweenTimestamps(d1, d2)
for (const unit of durationUnits) {
if (duration[unit] > 0) {
return formatter.format(duration[unit] * Math.sign(d1 - d2), unit)
}
}
return formatter.format(0, 'seconds')
}
/**
* Shows relative time based on locale, without any time adverbs such as "ago" (2 minutes ago), "in" (in 5 minutes), tomorrow, yesterday, etc
* @param {Intl.Locale} locale - target locale
* @param {number} d1 - target timestamp
* @param {number} d2 - timestamp to compare, if not defined uses current time
* @returns {string} formatted relative time
*/
function relativeTimeDurationFormat (locale, d1, d2 = timeNowFrame()) {
const duration = getDurationBetweenTimestamps(d1, d2)
for (const unit of durationUnits) {
if (duration[unit] > 0) {
return Intl.NumberFormat(locale.baseName, { style: 'unit', unit, unitDisplay: 'long' }).format(duration[unit])
}
}
return Intl.NumberFormat(locale.baseName, { style: 'unit', unit: 'seconds', unitDisplay: 'long' }).format(0)
}
/**
* Shows relative time based on locale in units
* @param {Intl.Locale} locale - target locale
* @param {Intl.RelativeTimeFormatUnit} unit - unit to use on the calc
* @param {number} d1 - target timestamp
* @param {number} d2 - timestamp to compare, if not defined uses current time
* @returns {string} formatted relative time
*/
function relativeTimeFormatInUnit (locale, unit, d1, d2 = timeNowFrame()) {
const elapsed = d1 - d2
const formatter = new Intl.RelativeTimeFormat(locale.baseName, { numeric: 'auto' })
for (const [durationUnit, duration] of durationUnitsEntries) {
// "Math.abs" accounts for both "past" & "future" scenarios
if (durationUnit === unit) {
return formatter.format(Math.floor(elapsed / duration), unit)
}
}
return relativeTimeFormat(locale, d1, d2)
}
/**
* Shows relative time based on locale in units, without any time adverbs such as "ago" (2 minutes ago), "in" (in 5 minutes), tomorrow, yesterday, etc...
*
* When the unit is zero it applies the value in the next unit where the value is above zero (0)
* @param {Intl.Locale} locale - target locale
* @param {Intl.RelativeTimeFormatUnit} unit unit to use on the calc
* @param {number} d1 - target timestamp
* @param {number} d2 - timestamp to compare, if not defined uses current time
* @returns {string} formatted relative time
*/
function relativeTimeDurationFormatInUnit (locale, unit, d1, d2 = timeNowFrame()) {
// "Math.abs" accounts for both "past" & "future" scenarios
const elapsed = Math.abs(d1 - d2)
for (const [durationUnit, duration] of durationUnitsEntries) {
if (durationUnit === unit) {
if (elapsed < duration) { break }
return Intl.NumberFormat(locale.baseName, { style: 'unit', unit, unitDisplay: 'long' }).format(Math.floor(elapsed / duration))
}
}
return relativeTimeDurationFormat(locale, d1, d2)
}
/**
* Shows relative time based on locale, from the longest unit that has a positive value to the selected unit, without any time adverbs such as "ago" (2 minutes ago), "in" (in 5 minutes), tomorrow, yesterday, etc
* @param {Intl.Locale} locale - target locale
* @param {Intl.RelativeTimeFormatUnit} toUnit unit to use on the calc
* @param {number} d1 - target timestamp
* @param {number} d2 - timestamp to compare, if not defined uses current time
* @returns {string} formatted relative time
*/
function relativeTimeFormatToUnit (locale, toUnit, d1, d2 = timeNowFrame()) {
// "Math.abs" accounts for both "past" & "future" scenarios
let elapsed = Math.abs(d1 - d2)
const listFormatter = new Intl.ListFormat(locale.baseName, { style: 'long', type: 'conjunction' })
const list = []
for (const [unit, duration] of durationUnitsEntries) {
if (elapsed > duration) {
const amount = Math.floor(elapsed / duration)
const timeUnitFormatter = Intl.NumberFormat(locale.baseName, { style: 'unit', unit, unitDisplay: 'long' })
list.push(timeUnitFormatter.format(amount))
elapsed -= amount * duration
}
if (unit === toUnit) {
if (list.length) {
break
}
return relativeTimeDurationFormat(locale, d1, d2)
}
}
return listFormatter.format(list)
}
/**
* @typedef {Record<string, Formatter>} FormatterMap
*/
/**
* @callback FormatCall
* @param {string} text - text input
* @param {Intl.Locale} locale - internationalization locale
* @returns {string} formatted text
*/
/**
* @typedef {object} Formatter
* @property {FormatCall} format - format function
* @property {boolean} [isConstant] - flag to tell if format function returns the same result given the same input
*/
export const formatters = {
...baseFormatter,
...relativeTimeFormatters,
}
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