Add support for working with negative dates
See discussion https://groups.google.com/g/tiddlywiki/c/aHlyaHr93Io/m/vGcDa6lxAgAJ
This commit is contained in:
jeremy@jermolene.com
parent
dde4182830
commit
6a91dbfe2f
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@ -305,7 +305,12 @@ $tw.utils.stringifyDate = function(value) {
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// Parse a date from a UTC YYYYMMDDHHMMSSmmm format string
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$tw.utils.parseDate = function(value) {
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if(typeof value === "string") {
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var year = parseInt(value.substr(0,4),10),
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var negative = 1;
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if(value.charAt(0) === "-") {
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negative = -1;
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value = value.substr(1);
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}
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var year = parseInt(value.substr(0,4),10) * negative,
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d = new Date(Date.UTC(year,
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parseInt(value.substr(4,2),10)-1,
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parseInt(value.substr(6,2),10),
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@ -302,7 +302,7 @@ exports.formatDateString = function(date,template) {
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return $tw.utils.pad($tw.utils.getHours12(date));
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}],
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[/^wYYYY/, function() {
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return $tw.utils.getYearForWeekNo(date);
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return $tw.utils.pad($tw.utils.getYearForWeekNo(date),4);
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}],
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[/^hh12/, function() {
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return $tw.utils.getHours12(date);
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@ -311,7 +311,14 @@ exports.formatDateString = function(date,template) {
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return date.getDate() + $tw.utils.getDaySuffix(date);
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}],
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[/^YYYY/, function() {
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return date.getFullYear();
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return $tw.utils.pad(date.getFullYear(),4);
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}],
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[/^aYYYY/, function() {
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return $tw.utils.pad(Math.abs(date.getFullYear()),4);
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}],
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[/^\{era:([^,\|}]*)\|([^}\|]*)\|([^}]*)\}/, function(match) {
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var year = date.getFullYear();
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return year === 0 ? match[2] : (year < 0 ? match[1] : match[3]);
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}],
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[/^0hh/, function() {
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return $tw.utils.pad(date.getHours());
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@ -400,7 +407,7 @@ exports.formatDateString = function(date,template) {
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$tw.utils.each(matches, function(m) {
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var match = m[0].exec(t);
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if(match) {
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matchString = m[1].call();
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matchString = m[1].call(null,match);
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t = t.substr(match[0].length);
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return false;
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}
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@ -25,6 +25,16 @@ describe("Utility tests", function() {
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expect(psa(" [[Tidd\u00a0ler8]] two ")).toEqual(["Tidd\u00a0ler8","two"]);
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});
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it("should handle parsing a date", function() {
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var pd = function(v) {
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return $tw.utils.parseDate(v).toString();
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};
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expect(pd("20150428204930183")).toEqual("Tue Apr 28 2015 21:49:30 GMT+0100 (British Summer Time)");
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expect(pd("-20150428204930183")).toEqual("Sun Apr 28 -2015 20:48:15 GMT-0001 (British Summer Time)");
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expect(pd("00730428204930183")).toEqual("Fri Apr 28 0073 20:48:15 GMT-0001 (British Summer Time)");
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expect(pd("-00730428204930183")).toEqual("Thu Apr 28 -0073 20:48:15 GMT-0001 (British Summer Time)");
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});
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it("should handle base64 encoding emojis", function() {
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var booksEmoji = "📚";
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expect(booksEmoji).toBe(booksEmoji);
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@ -62,6 +72,8 @@ describe("Utility tests", function() {
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var fds = $tw.utils.formatDateString,
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// nov is month: 10!
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d = new Date(2014,10,9,17,41,28,542);
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expect(fds(d,"{era:bce||ce}")).toBe("ce");
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expect(fds(d,"YYYY")).toBe("2014");
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expect(fds(d,"DDD DD MMM YYYY")).toBe("Sunday 9 November 2014");
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expect(fds(d,"ddd hh mm ssss")).toBe("Sun 17 41 2828");
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expect(fds(d,"MM0DD")).toBe("1109");
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@ -92,6 +104,19 @@ describe("Utility tests", function() {
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d = new Date(2014,11,29,23,59,59);
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expect(fds(d,"WW")).toBe("1");
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expect(fds(d,"wYYYY")).toBe("2015");
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// Negative years
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d = new Date(-2014,10,9,17,41,28,542);
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expect(fds(d,"YYYY")).toBe("-2014");
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expect(fds(d,"aYYYY")).toBe("2014");
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expect(fds(d,"{era:bce||ce}")).toBe("bce");
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// Zero years
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d = new Date(0,10,9,17,41,28,542);
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d.setUTCFullYear(0); // See https://stackoverflow.com/a/5870822
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expect(fds(d,"YYYY")).toBe("0000");
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expect(fds(d,"aYYYY")).toBe("0000");
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expect(fds(d,"{era:bce|z|ce}")).toBe("z");
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});
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it("should parse text references", function() {
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@ -1,28 +0,0 @@
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created: 20150117190213631
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modified: 20150124214537000
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tags: Concepts
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title: Date Fields
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type: text/vnd.tiddlywiki
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Certain [[fields|TiddlerFields]] of a tiddler are used to store dates and times.
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The two standard date fields are <<.field created>> and <<.field modified>>.
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Values of date fields are 17-character strings:
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* 4 digits for the year
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* 2 digits for the month
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* 2 digits for the day
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* 2 digits for the hour
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* 2 digits for the minute
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* 2 digits for the second
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* 3 digits for the millisecond
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To avoid problems arising from differences of time zone, TiddlyWiki always uses [[UTC|https://en.wikipedia.org/wiki/Coordinated_Universal_Time]].
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As an example, the <<.field created>> field of this tiddler has the value <<.value """<$view field="created"/>""">>.
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Dates can be [[converted to other formats|DateFormat]] for display:
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<$macrocall $name="wikitext-example-without-html"
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src="""<$view field="created" format="date" template="DDD DDth MMM YYYY"/>""">
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@ -1,48 +0,0 @@
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created: 20140418142957325
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modified: 20180730201626985
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tags: Features
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title: DateFormat
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type: text/vnd.tiddlywiki
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When used to display date values (with the `format` attribute set to ''date''), the ViewWidget accepts a `template` attribute that allows the format of the date values to be specified. The format string is processed with the following substitutions:
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|!Token |!Substituted Value |
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|`DDD` |Day of week in full (eg, "Monday") |
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|`ddd` |Short day of week (eg, "Mon") |
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|`DD` |Day of month |
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|`0DD` |Adds a leading zero |
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|`DDth` |Adds a suffix |
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|`WW` |ISO-8601 week number of year |
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|`0WW` |Adds a leading zero |
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|`MMM` |Month in full (eg, "July") |
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|`mmm` |Short month (eg, "Jul") |
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|`MM` |Month number |
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|`0MM` |Adds leading zero |
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|`YYYY` |Full year |
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|`YY` |Two digit year |
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|`wYYYY` |Full year with respect to week number |
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|`wYY` |Two digit year with respect to week number |
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|`hh` |Hours |
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|`0hh` |Adds a leading zero |
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|`hh12` |Hours in 12 hour clock |
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|`0hh12` |Hours in 12 hour clock with leading zero |
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|`mm` |Minutes |
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|`0mm` |Minutes with leading zero |
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|`ss` |Seconds |
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|`0ss` |Seconds with leading zero |
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|`XXX` |Milliseconds |
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|`0XXX` |Milliseconds with leading zero |
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|`am` or `pm` |Lower case AM/PM indicator |
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|`AM` or `PM` |Upper case AM/PM indicator |
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|`TZD` |Timezone offset |
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|`\x` |Used to escape a character that would otherwise have special meaning |
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|`[UTC]`|Time-shift the represented date to UTC. Must be at very start of format string|
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Note that other text is passed through unchanged, allowing commas, colons or other separators to be used.
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! Examples
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|!Template |!Output |
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|`DDth MMM YYYY` |16th February 2011 |
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|`DDth MMM \M\M\M YYYY` |16th February MMM 2011 |
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|`DDth mmm YYYY 0hh:0mm:0ss` |16th Feb 2011 11:38:42 |
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