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Code Issues Releases Wiki Activity

Add Timestamp to DateFormat (#7043)

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* add Timestamp to DateFormat

* improve TIMESTAMP documentation
This commit is contained in:
Maurycy Zarzycki 2022-11-21 17:13:34 +01:00 committed by GitHub
parent 8ead7e0624
commit d32d559f93
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3 changed files with 29 additions and 1 deletions
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3
core/modules/utils/utils.js
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@ -354,6 +354,9 @@ exports.formatDateString = function(date,template) {
var result = "",
t = template,
matches = [
[/^TIMESTAMP/, function() {
return date.getTime();
}],
[/^0hh12/, function() {
return $tw.utils.pad($tw.utils.getHours12(date));
}],

1
editions/test/tiddlers/tests/test-utils.js
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@ -78,6 +78,7 @@ describe("Utility tests", function() {
expect(fds(d,"ddd hh mm ssss")).toBe("Sun 17 41 2828");
expect(fds(d,"MM0DD")).toBe("1109");
expect(fds(d,"MM0\\D\\D")).toBe("110DD");
expect(fds(d,"TIMESTAMP")).toBe(d.getTime().toString());
const day = d.getUTCDate();
const dayStr = ("" + day).padStart(2, '0');
const hours = d.getUTCHours();

26
editions/tw5.com/tiddlers/features/DateFormat.tid
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@ -1,5 +1,5 @@
created: 20140418142957325
modified: 20210912115121622
modified: 20221121131150032
tags: Features
title: DateFormat
type: text/vnd.tiddlywiki
@ -46,6 +46,7 @@ The date string is processed with the following substitutions:
|`am` or `pm` |Lower case AM/PM indicator |
|`AM` or `PM` |Upper case AM/PM indicator |
|`TZD` |Timezone offset |
|`TIMESTAMP` |<<.from-version "5.2.4">> Number of milliseconds since the [[ECMAScript epoch|https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date#the_ecmascript_epoch_and_timestamps]], 1 January 1970. |
|`\x` |Used to escape a character that would otherwise have special meaning |
|`[UTC]`|Time-shift the represented date to UTC. Must be at very start of format string|
@ -59,3 +60,26 @@ The `{era:BCE||CE}` notation can specify different strings for years that are ne
|`DDth MMM YYYY` |16th February 2011 |
|`DDth MMM \M\M\M YYYY` |16th February MMM 2011 |
|`DDth mmm YYYY 0hh:0mm:0ss` |16th Feb 2011 11:38:42 |
!! Using `TIMESTAMP` to calculate time difference
You can calculate the difference between two dates by doing the following:
# Convert both dates to timestamps
# Subtract the later date from the earlier one -- if you don't know which one is earlier use the <<.olink "abs">> operator to get an absolute value after subtraction
# Divide the resulting number by the number of milliseconds in your chosen interval
Here is an example of calculating the number of days that passed between creation and last modification of current tiddler:
* Fields `modified` and `created` contain their respective datetimes in the format `YYYYMMDDHHMMSSmmm` so convert them to timestamps
* `86400000` is the number of milliseconds in a day (1000 * 60 * 60 * 24)
<$macrocall $name=".example" n="0" eg="""<$let
timestamp-modified={{{ [{!!modified}format:date[TIMESTAMP]] }}}
timestamp-created={{{ [{!!created}format:date[TIMESTAMP]] }}}
difference-days={{{ [<timestamp-modified>subtract<timestamp-created>divide[86400000]floor[]] }}}>
* ''Modified date:'' <$text text={{{ [{!!modified}format:date[YYYY-0MM-0DD]] }}}/>
* ''Created date:'' <$text text={{{ [{!!created}format:date[YYYY-0MM-0DD]] }}}/>
* ''Difference in days:'' <<difference-days>> days
</$let>"""/>