mirror of
https://github.com/tag1consulting/d7_to_d10_migration.git
synced 2024-11-26 07:53:25 +00:00
67 lines
2.5 KiB
JavaScript
67 lines
2.5 KiB
JavaScript
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(function ($) {
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/**
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* Set the client's system time zone as default values of form fields.
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*/
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Drupal.behaviors.setTimezone = {
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attach: function (context, settings) {
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$('select.timezone-detect', context).once('timezone', function () {
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var dateString = Date();
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// In some client environments, date strings include a time zone
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// abbreviation, between 3 and 5 letters enclosed in parentheses,
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// which can be interpreted by PHP.
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var matches = dateString.match(/\(([A-Z]{3,5})\)/);
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var abbreviation = matches ? matches[1] : 0;
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// For all other client environments, the abbreviation is set to "0"
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// and the current offset from UTC and daylight saving time status are
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// used to guess the time zone.
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var dateNow = new Date();
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var offsetNow = dateNow.getTimezoneOffset() * -60;
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// Use January 1 and July 1 as test dates for determining daylight
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// saving time status by comparing their offsets.
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var dateJan = new Date(dateNow.getFullYear(), 0, 1, 12, 0, 0, 0);
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var dateJul = new Date(dateNow.getFullYear(), 6, 1, 12, 0, 0, 0);
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var offsetJan = dateJan.getTimezoneOffset() * -60;
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var offsetJul = dateJul.getTimezoneOffset() * -60;
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var isDaylightSavingTime;
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// If the offset from UTC is identical on January 1 and July 1,
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// assume daylight saving time is not used in this time zone.
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if (offsetJan == offsetJul) {
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isDaylightSavingTime = '';
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}
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// If the maximum annual offset is equivalent to the current offset,
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// assume daylight saving time is in effect.
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else if (Math.max(offsetJan, offsetJul) == offsetNow) {
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isDaylightSavingTime = 1;
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}
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// Otherwise, assume daylight saving time is not in effect.
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else {
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isDaylightSavingTime = 0;
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}
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// Submit request to the system/timezone callback and set the form field
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// to the response time zone. The client date is passed to the callback
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// for debugging purposes. Submit a synchronous request to avoid database
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// errors associated with concurrent requests during install.
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var path = 'system/timezone/' + abbreviation + '/' + offsetNow + '/' + isDaylightSavingTime;
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var element = this;
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$.ajax({
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async: false,
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url: settings.basePath,
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data: { q: path, date: dateString },
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dataType: 'json',
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success: function (data) {
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if (data) {
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$(element).val(data);
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}
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}
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});
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});
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}
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};
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})(jQuery);
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