sjs/strftime
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support Ruby extensions: %- %_ and %0 (closes #18)

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Sami Samhuri 2013-03-07 19:43:57 -08:00
parent a5e2d305db
commit 71af5de2e3
2 changed files with 52 additions and 15 deletions
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58
lib/index.js
View file

@ -70,45 +70,68 @@
d = new Date(d.getTime() + msDelta);
}
// Most of the specifiers supported by C's strftime, and one from Ruby (%L)
return fmt.replace(/%(.)/g, function(_, c) {
// Most of the specifiers supported by C's strftime, and some from Ruby.
// Some other syntax extensions from Ruby are supported: %-, %_, and %0
// to pad with nothing, space, or zero (respectively).
return fmt.replace(/%([-_0]?.)/g, function(_, c) {
var mod, padding;
if (c.length == 2) {
mod = c[0];
// omit padding
if (mod == '-') {
padding = '';
}
// pad with space
else if (mod == '_') {
padding = ' ';
}
// pad with zero
else if (mod == '0') {
padding = '0';
}
else {
// unrecognized, return the format
return _;
}
c = c[1];
}
switch (c) {
case 'A': return locale.days[d.getDay()];
case 'a': return locale.shortDays[d.getDay()];
case 'B': return locale.months[d.getMonth()];
case 'b': return locale.shortMonths[d.getMonth()];
case 'C': return pad(Math.floor(d.getFullYear() / 100));
case 'C': return pad(Math.floor(d.getFullYear() / 100), padding);
case 'D': return _strftime(locale.formats.D || '%m/%d/%y', d, locale);
case 'd': return pad(d.getDate());
case 'd': return pad(d.getDate(), padding);
case 'e': return d.getDate();
case 'F': return _strftime(locale.formats.F || '%Y-%m-%d', d, locale);
case 'H': return pad(d.getHours());
case 'H': return pad(d.getHours(), padding);
case 'h': return locale.shortMonths[d.getMonth()];
case 'I': return pad(hours12(d));
case 'I': return pad(hours12(d), padding);
case 'j':
var y=new Date(d.getFullYear(), 0, 1);
var day = Math.ceil((d.getTime() - y.getTime()) / (1000*60*60*24));
return day;
case 'k': return pad(d.getHours(), ' ');
case 'k': return pad(d.getHours(), padding == null ? ' ' : padding);
case 'L': return pad(Math.floor(d.getTime() % 1000), 3);
case 'l': return pad(hours12(d), ' ');
case 'M': return pad(d.getMinutes());
case 'm': return pad(d.getMonth() + 1);
case 'l': return pad(hours12(d), padding == null ? ' ' : padding);
case 'M': return pad(d.getMinutes(), padding);
case 'm': return pad(d.getMonth() + 1, padding);
case 'n': return '\n';
case 'P': return d.getHours() < 12 ? locale.am : locale.pm;
case 'p': return d.getHours() < 12 ? locale.AM : locale.PM;
case 'R': return _strftime(locale.formats.R || '%H:%M', d, locale);
case 'r': return _strftime(locale.formats.r || '%I:%M:%S %p', d, locale);
case 'S': return pad(d.getSeconds());
case 'S': return pad(d.getSeconds(), padding);
case 's': return Math.floor((d.getTime() - msDelta) / 1000);
case 'T': return _strftime(locale.formats.T || '%H:%M:%S', d, locale);
case 't': return '\t';
case 'U': return pad(weekNumber(d, 'sunday'));
case 'U': return pad(weekNumber(d, 'sunday'), padding);
case 'u':
var day = d.getDay();
return day == 0 ? 7 : day; // 1 - 7, Monday is first day of the week
case 'v': return _strftime(locale.formats.v || '%e-%b-%Y', d, locale);
case 'W': return pad(weekNumber(d, 'monday'));
case 'W': return pad(weekNumber(d, 'monday'), padding);
case 'w': return d.getDay(); // 0 - 6, Sunday is first day of the week
case 'Y': return d.getFullYear();
case 'y':
@ -157,11 +180,16 @@
}
// Defaults handle pad(n) and pad(n, <padding>)
padding = padding || '0';
if (padding == null) {
padding = '0';
}
length = length || 2;
var s = String(n);
while (s.length < length) s = padding + s;
// padding may be an empty string, don't loop forever if it is
if (padding) {
while (s.length < length) s = padding + s;
}
return s;
}

9
test/test.js
View file

@ -60,15 +60,24 @@ assert.format('%b', 'Jun')
assert.format('%C', '20')
assert.format('%D', '06/07/11')
assert.format('%d', '07')
assert.format('%-d', '7')
assert.format('%_d', ' 7')
assert.format('%0d', '07')
assert.format('%e', '7')
assert.format('%F', '2011-06-07')
assert.format('%H', null, '18')
assert.format('%h', 'Jun')
assert.format('%I', null, '06')
assert.format('%-I', null, '6')
assert.format('%_I', null, ' 6')
assert.format('%0I', null, '06')
assert.format('%j', null, '158')
assert.format('%k', null, '18')
assert.format('%L', '067')
assert.format('%l', null, ' 6')
assert.format('%-l', null, '6')
assert.format('%_l', null, ' 6')
assert.format('%0l', null, '06')
assert.format('%M', null, '51')
assert.format('%m', '06')
assert.format('%n', '\n')