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| // Some configrable constants we need to do our work: | |
| /** | |
| * Past this number of days we'll no longer display the | |
| * day of the week and instead we'll display the date | |
| * with the month | |
| */ | |
| const DATE_WITH_MONTH_THRESHOLD_IN_DAYS: number = 6; | |
| /** | |
| * Past this number of seconds it's now longer "now" when | |
| * we're displaying dates | |
| */ | |
| const NOW_THRESHOLD_IN_SECONDS: number = 10; | |
| /** | |
| * Past this number of hours we'll no longer display "hours | |
| * ago" and instead we'll display "today" | |
| */ | |
| const TODAY_AT_THRESHOLD_IN_HOURS: number = 12; | |
| // The actual work starts here: | |
| /** | |
| * Retrieve a human-friendly date string relative to now and in the | |
| * current locale e.g. "two minutes ago" | |
| */ | |
| function humanFriendlyDate(date: Date): string { | |
| const unixTimestamp: number = millisecondsToSeconds(date.valueOf()); | |
| const now: number = millisecondsToSeconds(Date.now()); | |
| const diffComponents: DateTimeComponents = | |
| getDateTimeComponents(now - unixTimestamp); | |
| const { years, months, days, hours, minutes, seconds } = diffComponents; | |
| if (years > 0) { | |
| return formatLocalizedDateWithOrdinal(currentLocale, | |
| date, | |
| { includeYear: true }); | |
| } | |
| if (months > 0 || days > DATE_WITH_MONTH_THRESHOLD_IN_DAYS) { | |
| return formatLocalizedDateWithOrdinal(currentLocale, | |
| date, | |
| { includeYear: false }); | |
| } | |
| if (days > 1) { | |
| return date.toLocaleDateString(currentLocale, { weekday: "long" }); | |
| } | |
| if (days === 1) { | |
| return __("yesterday"); | |
| } | |
| if (hours > TODAY_AT_THRESHOLD_IN_HOURS) { | |
| return __("today at") + " " + | |
| date.toLocaleTimeString(currentLocale, | |
| { hour: "numeric", minute: "2-digit" }); | |
| } | |
| if (hours > 0) { | |
| return _p("hours ago", hours); | |
| } | |
| if (minutes > 0) { | |
| return _p("minutes ago", minutes); | |
| } | |
| if (seconds > NOW_THRESHOLD_IN_SECONDS) { | |
| return _p("seconds ago", seconds); | |
| } | |
| return __("just now"); | |
| } |
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