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Diffstat (limited to 'media/admin_media/js/dateparse.js')
| -rw-r--r-- | media/admin_media/js/dateparse.js | 233 |
1 files changed, 233 insertions, 0 deletions
diff --git a/media/admin_media/js/dateparse.js b/media/admin_media/js/dateparse.js new file mode 100644 index 0000000..e1c870e --- /dev/null +++ b/media/admin_media/js/dateparse.js @@ -0,0 +1,233 @@ +/* 'Magic' date parsing, by Simon Willison (6th October 2003) + http://simon.incutio.com/archive/2003/10/06/betterDateInput + Adapted for 6newslawrence.com, 28th January 2004 +*/ + +/* Finds the index of the first occurence of item in the array, or -1 if not found */ +if (typeof Array.prototype.indexOf == 'undefined') { + Array.prototype.indexOf = function(item) { + var len = this.length; + for (var i = 0; i < len; i++) { + if (this[i] == item) { + return i; + } + } + return -1; + }; +} +/* Returns an array of items judged 'true' by the passed in test function */ +if (typeof Array.prototype.filter == 'undefined') { + Array.prototype.filter = function(test) { + var matches = []; + var len = this.length; + for (var i = 0; i < len; i++) { + if (test(this[i])) { + matches[matches.length] = this[i]; + } + } + return matches; + }; +} + +var monthNames = gettext("January February March April May June July August September October November December").split(" "); +var weekdayNames = gettext("Sunday Monday Tuesday Wednesday Thursday Friday Saturday").split(" "); + +/* Takes a string, returns the index of the month matching that string, throws + an error if 0 or more than 1 matches +*/ +function parseMonth(month) { + var matches = monthNames.filter(function(item) { + return new RegExp("^" + month, "i").test(item); + }); + if (matches.length == 0) { + throw new Error("Invalid month string"); + } + if (matches.length > 1) { + throw new Error("Ambiguous month"); + } + return monthNames.indexOf(matches[0]); +} +/* Same as parseMonth but for days of the week */ +function parseWeekday(weekday) { + var matches = weekdayNames.filter(function(item) { + return new RegExp("^" + weekday, "i").test(item); + }); + if (matches.length == 0) { + throw new Error("Invalid day string"); + } + if (matches.length > 1) { + throw new Error("Ambiguous weekday"); + } + return weekdayNames.indexOf(matches[0]); +} + +/* Array of objects, each has 're', a regular expression and 'handler', a + function for creating a date from something that matches the regular + expression. Handlers may throw errors if string is unparseable. +*/ +var dateParsePatterns = [ + // Today + { re: /^tod/i, + handler: function() { + return new Date(); + } + }, + // Tomorrow + { re: /^tom/i, + handler: function() { + var d = new Date(); + d.setDate(d.getDate() + 1); + return d; + } + }, + // Yesterday + { re: /^yes/i, + handler: function() { + var d = new Date(); + d.setDate(d.getDate() - 1); + return d; + } + }, + // 4th + { re: /^(\d{1,2})(st|nd|rd|th)?$/i, + handler: function(bits) { + var d = new Date(); + d.setDate(parseInt(bits[1], 10)); + return d; + } + }, + // 4th Jan + { re: /^(\d{1,2})(?:st|nd|rd|th)? (\w+)$/i, + handler: function(bits) { + var d = new Date(); + d.setDate(parseInt(bits[1], 10)); + d.setMonth(parseMonth(bits[2])); + return d; + } + }, + // 4th Jan 2003 + { re: /^(\d{1,2})(?:st|nd|rd|th)? (\w+),? (\d{4})$/i, + handler: function(bits) { + var d = new Date(); + d.setDate(parseInt(bits[1], 10)); + d.setMonth(parseMonth(bits[2])); + d.setYear(bits[3]); + return d; + } + }, + // Jan 4th + { re: /^(\w+) (\d{1,2})(?:st|nd|rd|th)?$/i, + handler: function(bits) { + var d = new Date(); + d.setDate(parseInt(bits[2], 10)); + d.setMonth(parseMonth(bits[1])); + return d; + } + }, + // Jan 4th 2003 + { re: /^(\w+) (\d{1,2})(?:st|nd|rd|th)?,? (\d{4})$/i, + handler: function(bits) { + var d = new Date(); + d.setDate(parseInt(bits[2], 10)); + d.setMonth(parseMonth(bits[1])); + d.setYear(bits[3]); + return d; + } + }, + // next Tuesday - this is suspect due to weird meaning of "next" + { re: /^next (\w+)$/i, + handler: function(bits) { + var d = new Date(); + var day = d.getDay(); + var newDay = parseWeekday(bits[1]); + var addDays = newDay - day; + if (newDay <= day) { + addDays += 7; + } + d.setDate(d.getDate() + addDays); + return d; + } + }, + // last Tuesday + { re: /^last (\w+)$/i, + handler: function(bits) { + throw new Error("Not yet implemented"); + } + }, + // mm/dd/yyyy (American style) + { re: /(\d{1,2})\/(\d{1,2})\/(\d{4})/, + handler: function(bits) { + var d = new Date(); + d.setYear(bits[3]); + d.setDate(parseInt(bits[2], 10)); + d.setMonth(parseInt(bits[1], 10) - 1); // Because months indexed from 0 + return d; + } + }, + // yyyy-mm-dd (ISO style) + { re: /(\d{4})-(\d{1,2})-(\d{1,2})/, + handler: function(bits) { + var d = new Date(); + d.setYear(parseInt(bits[1])); + d.setMonth(parseInt(bits[2], 10) - 1); + d.setDate(parseInt(bits[3], 10)); + return d; + } + }, +]; + +function parseDateString(s) { + for (var i = 0; i < dateParsePatterns.length; i++) { + var re = dateParsePatterns[i].re; + var handler = dateParsePatterns[i].handler; + var bits = re.exec(s); + if (bits) { + return handler(bits); + } + } + throw new Error("Invalid date string"); +} + +function fmt00(x) { + // fmt00: Tags leading zero onto numbers 0 - 9. + // Particularly useful for displaying results from Date methods. + // + if (Math.abs(parseInt(x)) < 10){ + x = "0"+ Math.abs(x); + } + return x; +} + +function parseDateStringISO(s) { + try { + var d = parseDateString(s); + return d.getFullYear() + '-' + (fmt00(d.getMonth() + 1)) + '-' + fmt00(d.getDate()) + } + catch (e) { return s; } +} +function magicDate(input) { + var messagespan = input.id + 'Msg'; + try { + var d = parseDateString(input.value); + input.value = d.getFullYear() + '-' + (fmt00(d.getMonth() + 1)) + '-' + + fmt00(d.getDate()); + input.className = ''; + // Human readable date + if (document.getElementById(messagespan)) { + document.getElementById(messagespan).firstChild.nodeValue = d.toDateString(); + document.getElementById(messagespan).className = 'normal'; + } + } + catch (e) { + input.className = 'error'; + var message = e.message; + // Fix for IE6 bug + if (message.indexOf('is null or not an object') > -1) { + message = 'Invalid date string'; + } + if (document.getElementById(messagespan)) { + document.getElementById(messagespan).firstChild.nodeValue = message; + document.getElementById(messagespan).className = 'error'; + } + } +} |