Convoluted way using .exec() and a loop:
var months = [ "January", "February", "March", "April", "May", "June",
"July", "August", "September", "October", "November", "December" ];
var isoRegex = /(\[\[)?\b([12]\d\d\d)(\]\])?-(\[\[)?(0[1-9]|1[0-2])-([0-3]\d)\b(?!-)(\]\])?/;
var lastIsoRegexFoundAt = 0;
var isoRegexResult = isoRegex.exec(pageSource);
while (isoRegexResult)
{
if (formattingAmericanStyle)
reformattedDate = months[isoRegexResult[5] - 1] + " " + (isoRegexResult[6] - 0) + ", " + isoRegexResult[2];
else
reformattedDate = (isoRegexResult[6] - 0) + " " + months[isoRegexResult[5] - 1] + " " + isoRegexResult[2];
var regexFoundAt = pageSource.search(isoRegex, lastIsoRegexFoundAt);
if (regexFoundAt != -1)
{
pageSource = pageSource.substr(0, regexFoundAt) + reformattedDate + pageSource.substr(regexFoundAt + isoRegexResult[0].length);
isoRegexResult = isoRegex.exec(pageSource.substr(regexFoundAt + reformattedDate.length));
}
else
{
isoRegexResult = null;
}
lastIsoRegexFoundAt = regexFoundAt;
}
Simpler way using .replace() with a function:
var months = [ "January", "February", "March", "April", "May", "June",
"July", "August", "September", "October", "November", "December" ];
var isoRegex = /(\[\[)?\b([12]\d\d\d)(\]\])?-(\[\[)?(0[1-9]|1[0-2])-([0-3]\d)\b(?!-)(\]\])?/g;
pageSource = pageSource.replace( isoRegex, function(date, a,year,b,c,month,day,d)
{
if (formattingAmericanStyle)
return months[month-1] + " " + (day-0) + ", " + year;
else
return (day-0) + " " + months[month-1] + " " + year;
});
Adding some "look-behind" to ensure dates in links aren't changed:
var months = [ "January", "February", "March", "April", "May", "June",
"July", "August", "September", "October", "November", "December" ];
var isoRegex = /(\[\[)?\b([12]\d\d\d)(\]\])?-(\[\[)?(0[1-9]|1[0-2])-([0-3]\d)\b(?!-)(\]\])?/g;
pageSource = pageSource.replace( isoRegex, function(date, a,year,b,c,month,day,d, pos,string)
{
// Don't touch dates inside links, template names, URLs, or HTML tags.
// Or if "date" ends a longer ID number like 33-2539-55-1987-10-25.
//
var pat = /\[\[[^|\]]*$|\{\{[^|}]*$|[:\/%][^\s|>]+$|<[^>]*$|-$/;
if (string.substring(pos-260,pos).search(pat) >= 0)
return date;
if (formattingAmericanStyle)
return months[month-1] + " " + (day-0) + ", " + year;
else
return (day-0) + " " + months[month-1] + " " + year;
});