function formatPattern()

in tapestry-framework/src/js/dojo-0.4.3-custom-4.1.6/dojo2.js.uncompressed.js [2002:2162]

• 160 lines of code
• 66 McCabe index (conditional complexity)

	function formatPattern(dateObject, pattern){
		return pattern.replace(/([a-z])\1*/ig, function(match){
			var s;
			var c = match.charAt(0);
			var l = match.length;
			var pad;
			var widthList = ["abbr", "wide", "narrow"];
			switch(c){
				case 'G':
					if(l>3){dojo.unimplemented("Era format not implemented");}
					s = bundle.eras[dateObject.getFullYear() < 0 ? 1 : 0];
					break;
				case 'y':
					s = dateObject.getFullYear();
					switch(l){
						case 1:
							break;
						case 2:
							s = String(s); s = s.substr(s.length - 2);
							break;
						default:
							pad = true;
					}
					break;
				case 'Q':
				case 'q':
					s = Math.ceil((dateObject.getMonth()+1)/3);
					switch(l){
						case 1: case 2:
							pad = true;
							break;
						case 3:
						case 4:
							dojo.unimplemented("Quarter format not implemented");
					}
					break;
				case 'M':
				case 'L':
					var m = dateObject.getMonth();
					var width;
					switch(l){
						case 1: case 2:
							s = m+1; pad = true;
							break;
						case 3: case 4: case 5:
							width = widthList[l-3];
							break;
					}
					if(width){
						var type = (c == "L") ? "standalone" : "format";
						var prop = ["months",type,width].join("-");
						s = bundle[prop][m];
					}
					break;
				case 'w':
					var firstDay = 0;
					s = dojo.date.getWeekOfYear(dateObject, firstDay); pad = true;
					break;
				case 'd':
					s = dateObject.getDate(); pad = true;
					break;
				case 'D':
					s = dojo.date.getDayOfYear(dateObject); pad = true;
					break;
				case 'E':
				case 'e':
				case 'c': // REVIEW: don't see this in the spec?
					var d = dateObject.getDay();
					var width;
					switch(l){
						case 1: case 2:
							if(c == 'e'){
								var first = dojo.date.getFirstDayOfWeek(options.locale);
								d = (d-first+7)%7;
							}
							if(c != 'c'){
								s = d+1; pad = true;
								break;
							}
							// else fallthrough...
						case 3: case 4: case 5:
							width = widthList[l-3];
							break;
					}
					if(width){
						var type = (c == "c") ? "standalone" : "format";
						var prop = ["days",type,width].join("-");
						s = bundle[prop][d];
					}
					break;
				case 'a':
					var timePeriod = (dateObject.getHours() < 12) ? 'am' : 'pm';
					s = bundle[timePeriod];
					break;
				case 'h':
				case 'H':
				case 'K':
				case 'k':
					var h = dateObject.getHours();
					// strange choices in the date format make it impossible to write this succinctly
					switch (c) {
						case 'h': // 1-12
							s = (h % 12) || 12;
							break;
						case 'H': // 0-23
							s = h;
							break;
						case 'K': // 0-11
							s = (h % 12);
							break;
						case 'k': // 1-24
							s = h || 24;
							break;
					}
					pad = true;
					break;
				case 'm':
					s = dateObject.getMinutes(); pad = true;
					break;
				case 's':
					s = dateObject.getSeconds(); pad = true;
					break;
				case 'S':
					s = Math.round(dateObject.getMilliseconds() * Math.pow(10, l-3));
					break;
				case 'v': // FIXME: don't know what this is. seems to be same as z?
				case 'z':
					// We only have one timezone to offer; the one from the browser
					s = dojo.date.getTimezoneName(dateObject);
					if(s){break;}
					l=4;
					// fallthrough... use GMT if tz not available
				case 'Z':
					var offset = dateObject.getTimezoneOffset();
					var tz = [
						(offset<=0 ? "+" : "-"),
						dojo.string.pad(Math.floor(Math.abs(offset)/60), 2),
						dojo.string.pad(Math.abs(offset)% 60, 2)
					];
					if(l==4){
						tz.splice(0, 0, "GMT");
						tz.splice(3, 0, ":");
					}
					s = tz.join("");
					break;
				case 'Y':
				case 'u':
				case 'W':
				case 'F':
				case 'g':
				case 'A':
//					dojo.debug(match+" modifier not yet implemented");
					s = "?";
					break;
				default:
					dojo.raise("dojo.date.format: invalid pattern char: "+pattern);
			}
			if(pad){ s = dojo.string.pad(s, l); }
			return s;
		});
	}