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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,108 @@ | ||
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| format_time_ago <- local({ | ||
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| e <- expression | ||
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| `%s%` <- function(lhs, rhs) { | ||
| assert_string(lhs) | ||
| do.call( | ||
| sprintf, | ||
| c(list(lhs), as.list(rhs)) | ||
| ) | ||
| } | ||
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| assert_string <- function(x) { | ||
| stopifnot(is.character(x), length(x) == 1L) | ||
| } | ||
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| assert_diff_time <- function(x) { | ||
| stopifnot(inherits(x, "difftime")) | ||
| } | ||
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| vague_dt_default <- list( | ||
| list(c = e(seconds < 10), s = "moments ago"), | ||
| list(c = e(seconds < 45), s = "less than a minute ago"), | ||
| list(c = e(seconds < 90), s = "about a minute ago"), | ||
| list(c = e(minutes < 45), s = e("%d minutes ago" %s% round(minutes))), | ||
| list(c = e(minutes < 90), s = "about an hour ago"), | ||
| list(c = e(hours < 24), s = e("%d hours ago" %s% round(hours))), | ||
| list(c = e(hours < 42), s = "a day ago"), | ||
| list(c = e(days < 30), s = e("%d days ago" %s% round(days))), | ||
| list(c = e(days < 45), s = "about a month ago"), | ||
| list(c = e(days < 335), s = e("%d months ago" %s% round(days / 30))), | ||
| list(c = e(years < 1.5), s = "about a year ago"), | ||
| list(c = TRUE, s = e("%d years ago" %s% round(years))) | ||
| ) | ||
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| vague_dt_short <- list( | ||
| list(c = e(seconds < 50), s = "<1 min"), | ||
| list(c = e(minutes < 50), s = e("%d min" %s% round(minutes))), | ||
| list(c = e(hours < 1.5), s = "1 hour"), | ||
| list(c = e(hours < 18), s = e("%d hours" %s% round(hours))), | ||
| list(c = e(hours < 42), s = "1 day"), | ||
| list(c = e(days < 30), s = e("%d day" %s% round(days))), | ||
| list(c = e(days < 45), s = "1 mon"), | ||
| list(c = e(days < 335), s = e("%d mon" %s% round(days / 30))), | ||
| list(c = e(years < 1.5), s = "1 year"), | ||
| list(c = TRUE, s = e("%d years" %s% round(years))) | ||
| ) | ||
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| vague_dt_terse <- list( | ||
| list(c = e(seconds < 50), s = e("%2ds" %s% round(seconds))), | ||
| list(c = e(minutes < 50), s = e("%2dm" %s% round(minutes))), | ||
| list(c = e(hours < 18), s = e("%2dh" %s% round(hours))), | ||
| list(c = e(days < 30), s = e("%2dd" %s% round(days))), | ||
| list(c = e(days < 335), s = e("%2dM" %s% round(days / 30))), | ||
| list(c = TRUE, s = e("%2dy" %s% round(years))) | ||
| ) | ||
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| vague_dt_formats <- list( | ||
| "default" = vague_dt_default, | ||
| "short" = vague_dt_short, | ||
| "terse" = vague_dt_terse | ||
| ) | ||
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| time_ago <- function(date, format = c("default", "short", "terse")) { | ||
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| date <- as.POSIXct(date) | ||
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| if (length(date) > 1) return(sapply(date, time_ago, format = format)) | ||
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| seconds <- difftime(Sys.time(), date, units = "secs") | ||
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| vague_dt(seconds, format = format) | ||
| } | ||
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| vague_dt <- function(dt, format = c("default", "short", "terse")) { | ||
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| assert_diff_time(dt) | ||
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| units(dt) <- "secs" | ||
| seconds <- as.vector(dt) | ||
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| ## Simplest to quit here for empty input | ||
| if (!length(seconds)) return(character()) | ||
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| pieces <- list( | ||
| minutes = seconds / 60, | ||
| hours = seconds / 60 / 60, | ||
| days = seconds / 60 / 60 / 24, | ||
| years = seconds / 60 / 60 / 24 / 365.25 | ||
| ) | ||
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| format <- match.arg(format) | ||
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| for (p in vague_dt_formats[[format]]) { | ||
| if (eval(p$c, pieces)) return(eval(p$s, pieces)) | ||
| } | ||
| } | ||
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| structure( | ||
| list( | ||
| .internal = environment(), | ||
| time_ago = time_ago, | ||
| vague_dt = vague_dt | ||
| ), | ||
| class = c("standalone_time_ago", "standalone") | ||
| ) | ||
| }) |