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Regular expression for the full date syntax of ISO 8601

Update: A working solution has been reached while using multiple regular expressions

I am looking for a regular expression that covers the range of acceptable syntax for ISO 8601 dates. Most libraries and regular expressions cover only a subset or “simplified” version of 8601, such as RFC 3339, but the full code for 8601 includes ways to express duration and time intervals. The Wikipedia entry for ISO 8601 gives a good overview, but in short they should be valid dates:

var testDates = {
    'year' : "2013",        
    'date' : "2013-01-05",
    'datetime' : "2013-01-05T04:13:00+00:00",
    'Duration only' : "P1Y2M10DT2H30M",
    'Week Duration' : "P1W",
    'Range with start and end' : "2007-03-01T13:00:00Z/2008-05-11T15:30:00Z",
    'Range of Date/Duration' : "2007-03-01T13:00:00Z/P1Y2M10DT2H30M",
    'Range of Date/Duration 1 month' : "2012-10/P1M",
    'Range of Date/Duration 1 week' : "2012-10/P1W",
    'Range of Duration/Date' : "P1Y2M10DT2H30M/2007-03-01T13:00:00Z", 
    'Repeating interval 5 times' : "R5/2007-03-01T13:00:00Z/P1Y2M10DT2H30M", 
    'Repeating interval weekly indefinitely' : "R/2012-10/P1W",
    'Repeating interval monthly 5 times' : "R5/2012-10/P1M"
}

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var regex = {
    'Date' : /^([\+-]?\d{4}(?!\d{2}\b))((-?)((0[1-9]|1[0-2])(\3([12]\d|0[1-9]|3[01]))?|W([0-4]\d|5[0-2])(-?[1-7])?|(00[1-9]|0[1-9]\d|[12]\d{2}|3([0-5]\d|6[1-6])))([T\s]((([01]\d|2[0-3])((:?)[0-5]\d)?|24\:?00)([\.,]\d+(?!:))?)?(\17[0-5]\d([\.,]\d+)?)?([zZ]|([\+-])([01]\d|2[0-3]):?([0-5]\d)?)?)?)?$/,
    'Duration' : /^P(?=\w*\d)(?:\d+Y|Y)?(?:\d+M|M)?(?:\d+W|W)?(?:\d+D|D)?(?:T(?:\d+H|H)?(?:\d+M|M)?(?:\d+(?:\­.\d{1,2})?S|S)?)?$/,      
    'Range of Date/Date' : /^([\+-]?\d{4}(?!\d{2}\b))((-?)((0[1-9]|1[0-2])(\3([12]\d|0[1-9]|3[01]))?|W([0-4]\d|5[0-2])(-?[1-7])?|(00[1-9]|0[1-9]\d|[12]\d{2}|3([0-5]\d|6[1-6])))([T\s]((([01]\d|2[0-3])((:?)[0-5]\d)?|24\:?00)([\.,]\d+(?!:))?)?(\17[0-5]\d([\.,]\d+)?)?([zZ]|([\+-])([01]\d|2[0-3]):?([0-5]\d)?)?)?)?(\/)([\+-]?\d{4}(?!\d{2}\b))((-?)((0[1-9]|1[0-2])(\3([12]\d|0[1-9]|3[01]))?|W([0-4]\d|5[0-2])(-?[1-7])?|(00[1-9]|0[1-9]\d|[12]\d{2}|3([0-5]\d|6[1-6])))([T\s]((([01]\d|2[0-3])((:?)[0-5]\d)?|24\:?00)([\.,]\d+(?!:))?)?(\17[0-5]\d([\.,]\d+)?)?([zZ]|([\+-])([01]\d|2[0-3]):?([0-5]\d)?)?)?)?$/,      
    'Range of Date/Duration' : /^([\+-]?\d{4}(?!\d{2}\b))((-?)((0[1-9]|1[0-2])(\3([12]\d|0[1-9]|3[01]))?|W([0-4]\d|5[0-2])(-?[1-7])?|(00[1-9]|0[1-9]\d|[12]\d{2}|3([0-5]\d|6[1-6])))([T\s]((([01]\d|2[0-3])((:?)[0-5]\d)?|24\:?00)([\.,]\d+(?!:))?)?(\17[0-5]\d([\.,]\d+)?)?([zZ]|([\+-])([01]\d|2[0-3]):?([0-5]\d)?)?)?)?(\/)P(?=\w*\d)(?:\d+Y|Y)?(?:\d+M|M)?(?:\d+W|W)?(?:\d+D|D)?(?:T(?:\d+H|H)?(?:\d+M|M)?(?:\d+(?:\­.\d{1,2})?S|S)?)?$/,
    'Range of Duration/Date' : /^P(?=\w*\d)(?:\d+Y|Y)?(?:\d+M|M)?(?:\d+W|W)?(?:\d+D|D)?(?:T(?:\d+H|H)?(?:\d+M|M)?(?:\d+(?:\­.\d{1,2})?S|S)?)?\/([\+-]?\d{4}(?!\d{2}\b))((-?)((0[1-9]|1[0-2])(\3([12]\d|0[1-9]|3[01]))?|W([0-4]\d|5[0-2])(-?[1-7])?|(00[1-9]|0[1-9]\d|[12]\d{2}|3([0-5]\d|6[1-6])))([T\s]((([01]\d|2[0-3])((:?)[0-5]\d)?|24\:?00)([\.,]\d+(?!:))?)?(\17[0-5]\d([\.,]\d+)?)?([zZ]|([\+-])([01]\d|2[0-3]):?([0-5]\d)?)?)?)?$/,
    'Repeating interval' : /^R\d*\/([\+-]?\d{4}(?!\d{2}\b))((-?)((0[1-9]|1[0-2])(\3([12]\d|0[1-9]|3[01]))?|W([0-4]\d|5[0-2])(-?[1-7])?|(00[1-9]|0[1-9]\d|[12]\d{2}|3([0-5]\d|6[1-6])))([T\s]((([01]\d|2[0-3])((:?)[0-5]\d)?|24\:?00)([\.,]\d+(?!:))?)?(\17[0-5]\d([\.,]\d+)?)?([zZ]|([\+-])([01]\d|2[0-3]):?([0-5]\d)?)?)?)?\/P(?=\w*\d)(?:\d+Y|Y)?(?:\d+M|M)?(?:\d+W|W)?(?:\d+D|D)?(?:T(?:\d+H|H)?(?:\d+M|M)?(?:\d+(?:\­.\d{1,2})?S|S)?)?$/
}

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script:

+4
3

, ISO 8601. gist .

var regex = {
    'Date' : /^([\+-]?\d{4}(?!\d{2}\b))((-?)((0[1-9]|1[0-2])(\3([12]\d|0[1-9]|3[01]))?|W([0-4]\d|5[0-2])(-?[1-7])?|(00[1-9]|0[1-9]\d|[12]\d{2}|3([0-5]\d|6[1-6])))([T\s]((([01]\d|2[0-3])((:?)[0-5]\d)?|24\:?00)([\.,]\d+(?!:))?)?(\17[0-5]\d([\.,]\d+)?)?([zZ]|([\+-])([01]\d|2[0-3]):?([0-5]\d)?)?)?)?$/,
    'Duration' : /^P(?=\w*\d)(?:\d+Y|Y)?(?:\d+M|M)?(?:\d+W|W)?(?:\d+D|D)?(?:T(?:\d+H|H)?(?:\d+M|M)?(?:\d+(?:\­.\d{1,2})?S|S)?)?$/,      
    'Range of Date/Date' : /^([\+-]?\d{4}(?!\d{2}\b))((-?)((0[1-9]|1[0-2])(\3([12]\d|0[1-9]|3[01]))?|W([0-4]\d|5[0-2])(-?[1-7])?|(00[1-9]|0[1-9]\d|[12]\d{2}|3([0-5]\d|6[1-6])))([T\s]((([01]\d|2[0-3])((:?)[0-5]\d)?|24\:?00)([\.,]\d+(?!:))?)?(\17[0-5]\d([\.,]\d+)?)?([zZ]|([\+-])([01]\d|2[0-3]):?([0-5]\d)?)?)?)?(\/)([\+-]?\d{4}(?!\d{2}\b))((-?)((0[1-9]|1[0-2])(\3([12]\d|0[1-9]|3[01]))?|W([0-4]\d|5[0-2])(-?[1-7])?|(00[1-9]|0[1-9]\d|[12]\d{2}|3([0-5]\d|6[1-6])))([T\s]((([01]\d|2[0-3])((:?)[0-5]\d)?|24\:?00)([\.,]\d+(?!:))?)?(\17[0-5]\d([\.,]\d+)?)?([zZ]|([\+-])([01]\d|2[0-3]):?([0-5]\d)?)?)?)?$/,      
    'Range of Date/Duration' : /^([\+-]?\d{4}(?!\d{2}\b))((-?)((0[1-9]|1[0-2])(\3([12]\d|0[1-9]|3[01]))?|W([0-4]\d|5[0-2])(-?[1-7])?|(00[1-9]|0[1-9]\d|[12]\d{2}|3([0-5]\d|6[1-6])))([T\s]((([01]\d|2[0-3])((:?)[0-5]\d)?|24\:?00)([\.,]\d+(?!:))?)?(\17[0-5]\d([\.,]\d+)?)?([zZ]|([\+-])([01]\d|2[0-3]):?([0-5]\d)?)?)?)?(\/)P(?=\w*\d)(?:\d+Y|Y)?(?:\d+M|M)?(?:\d+W|W)?(?:\d+D|D)?(?:T(?:\d+H|H)?(?:\d+M|M)?(?:\d+(?:\­.\d{1,2})?S|S)?)?$/,
    'Range of Duration/Date' : /^P(?=\w*\d)(?:\d+Y|Y)?(?:\d+M|M)?(?:\d+W|W)?(?:\d+D|D)?(?:T(?:\d+H|H)?(?:\d+M|M)?(?:\d+(?:\­.\d{1,2})?S|S)?)?\/([\+-]?\d{4}(?!\d{2}\b))((-?)((0[1-9]|1[0-2])(\3([12]\d|0[1-9]|3[01]))?|W([0-4]\d|5[0-2])(-?[1-7])?|(00[1-9]|0[1-9]\d|[12]\d{2}|3([0-5]\d|6[1-6])))([T\s]((([01]\d|2[0-3])((:?)[0-5]\d)?|24\:?00)([\.,]\d+(?!:))?)?(\17[0-5]\d([\.,]\d+)?)?([zZ]|([\+-])([01]\d|2[0-3]):?([0-5]\d)?)?)?)?$/,
    'Repeating interval' : /^R\d*\/([\+-]?\d{4}(?!\d{2}\b))((-?)((0[1-9]|1[0-2])(\3([12]\d|0[1-9]|3[01]))?|W([0-4]\d|5[0-2])(-?[1-7])?|(00[1-9]|0[1-9]\d|[12]\d{2}|3([0-5]\d|6[1-6])))([T\s]((([01]\d|2[0-3])((:?)[0-5]\d)?|24\:?00)([\.,]\d+(?!:))?)?(\17[0-5]\d([\.,]\d+)?)?([zZ]|([\+-])([01]\d|2[0-3]):?([0-5]\d)?)?)?)?\/P(?=\w*\d)(?:\d+Y|Y)?(?:\d+M|M)?(?:\d+W|W)?(?:\d+D|D)?(?:T(?:\d+H|H)?(?:\d+M|M)?(?:\d+(?:\­.\d{1,2})?S|S)?)?$/
}
+4

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+1

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My suggestion would be to simplify the regular expressions matching each pattern mixed with some if / then code, or use / create a full parser.

Remember that regular expressions were intended for pattern matching, not for parsing. They are great for pulling quick values ​​from a string, but not for more complex things.

0
source

Source: https://habr.com/ru/post/1526232/

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