User:Quarl/date canonicalize.js

// User:Quarl/date_canonicalize.js - canonicalizes date WikiLinks

// Example: July 17, 1982 becomes 1982-07-17

// requires: wikipage.js, util.js, addlilink.js, datetime.js

// quarl 2006-01-31 initial version

//

datez = new autoedit(
'datez',
'DateZ',
'ca-datez',
'Canonicalize dates',
'Date canonicalization');
// Return a string for a regexp that matches possibly wiki-linked dates in
// various date formats.  This is a monster regexp, the hardest part of this
// script!
datez.buildRegExp = function() {
var groupIfNeccessary = function(s) {
// I don't know a good way to check against e.g. "(foo)|(bar)"; for now just be conservative in adding grouping
if (s.match(/\|/) /*&& !s.match(/^\(/) */ ) {
return '(?:' + s + ')';
} else {
return s;
}
}
var joinRE = function() {
// desplice arguments
var args = Array.concat.apply(Array, arguments).map(groupIfNeccessary);
return '(?:' + args.join('|') + ')';
}
var linked = function(s) {
return '\\[\\[ *'+s+' *\\]\\]';
}
var maybelinked = function(s) {
return joinRE(linked(s), s);
}
var abbrevMonth = function(s) {
return s.substr(0,3);
}
var word = function(s) {
return '\\b' + s + '\\b';
}
var year4 = word('[012][0-9][0-9][0-9]');
var year42 = word(joinRE(year4, '[890][0-9]'));
var month = word(joinRE('0?[1-9]', '1[012]'));
// monthnames is in datetime.js
var monthS = word(joinRE(monthnames, monthnames.map(abbrevMonth)));
var day = word('[0123]?[0-9](?:\'?st|nd|th)?');
var delimz = '[ ,/-]+';
var all = joinRE(
// YYYY-MM-DD formats
linked( year4 + '-' + month + '-' + day ),
maybelinked(year4)+'-'+maybelinked(month+'-'+day),
maybelinked(year4)+'/'+month+'/'+day,
maybelinked(year4)+'\\.'+month+'\\.'+day,
year4 + ' ' + month + ' ' + day,
maybelinked(year4 + delimz + monthS + delimz + day),
// MM-DD-YYYY formats
month + '-' + day + '-' + year4,
month + '/' + day + '/' + year42,
linked(monthS + delimz + day + delimz + year42),
maybelinked(monthS + delimz + day) + delimz + maybelinked(year42),
linked(monthS) + delimz + linked(day) + delimz + '(?:of\s*)?' + linked(year42),
// DD-MM-YYYY formats: only support monthS, because it's ambiguous
// otherwise
linked( day + delimz + monthS + delimz + year4 ),
maybelinked(day + delimz + monthS) + delimz + maybelinked(year4)
);
return new RegExp(all, 'i');
}
datez.replaceRegExp = function(d, m) {
s = m[0];
s = s.replace(/[\[\]]/g, '');
s = s.replace(/[-.]/g, '/'); // Date only understands '/' as delimiter
var d = new Date(s); // parses date string
if (!d.getFullYear()) {
// couldn't parse
return null;
}
return '' + datestampUTCISO(d) + '';
}
datez._load = function() {
datez.addTab();
}
addOnloadHook(datez._load);
//