From 8cfdf845683157b756f485ea91c3fc3f2a2697c6 Mon Sep 17 00:00:00 2001
From: Adam Chlipala <adam@chlipala.net>
Date: Thu, 24 Nov 2011 11:27:51 -0500
Subject: Client-side timef

---
 lib/js/urweb.js  | 200 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 src/settings.sml |   1 +
 tests/timef.ur   |  12 ++++
 3 files changed, 213 insertions(+)
 create mode 100644 tests/timef.ur

diff --git a/lib/js/urweb.js b/lib/js/urweb.js
index 8664ec9a..3829cdb2 100644
--- a/lib/js/urweb.js
+++ b/lib/js/urweb.js
@@ -157,6 +157,206 @@ function stringToTime(string) {
     }
 }
 
+/*
+ strftime for Javascript
+ Copyright (c) 2008, Philip S Tellis <philip@bluesmoon.info>
+ All rights reserved.
+ 
+ This code is distributed under the terms of the BSD licence
+ 
+ Redistribution and use of this software in source and binary forms, with or without modification,
+ are permitted provided that the following conditions are met:
+
+   * Redistributions of source code must retain the above copyright notice, this list of conditions
+     and the following disclaimer.
+   * Redistributions in binary form must reproduce the above copyright notice, this list of
+     conditions and the following disclaimer in the documentation and/or other materials provided
+     with the distribution.
+   * The names of the contributors to this file may not be used to endorse or promote products
+     derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
+WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+Date.ext = {};
+Date.ext.util = {};
+Date.ext.util.xPad=function(x, pad, r)
+{
+	if(typeof(r) == 'undefined')
+	{
+		r=10;
+	}
+	for( ; parseInt(x, 10)<r && r>1; r/=10)
+		x = pad.toString() + x;
+	return x.toString();
+};
+Date.prototype.locale = 'en-US';
+if(document.getElementsByTagName('html') && document.getElementsByTagName('html')[0].lang)
+{
+	Date.prototype.locale = document.getElementsByTagName('html')[0].lang;
+}
+Date.ext.locales = { };
+Date.ext.locales.en = {
+	a: ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'],
+	A: ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'],
+	b: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'],
+	B: ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'],
+	c: '%a %d %b %Y %T %Z',
+	p: ['AM', 'PM'],
+	P: ['am', 'pm'],
+	x: '%d/%m/%y',
+	X: '%T'
+};
+Date.ext.locales['en-US'] = Date.ext.locales.en;
+Date.ext.locales['en-US'].c = '%a %d %b %Y %r %Z';
+Date.ext.locales['en-US'].x = '%D';
+Date.ext.locales['en-US'].X = '%r';
+Date.ext.locales['en-GB'] = Date.ext.locales.en;
+Date.ext.locales['en-AU'] = Date.ext.locales['en-GB'];
+Date.ext.formats = {
+	a: function(d) { return Date.ext.locales[d.locale].a[d.getDay()]; },
+	A: function(d) { return Date.ext.locales[d.locale].A[d.getDay()]; },
+	b: function(d) { return Date.ext.locales[d.locale].b[d.getMonth()]; },
+	B: function(d) { return Date.ext.locales[d.locale].B[d.getMonth()]; },
+	c: 'toLocaleString',
+	C: function(d) { return Date.ext.util.xPad(parseInt(d.getFullYear()/100, 10), 0); },
+	d: ['getDate', '0'],
+	e: ['getDate', ' '],
+	g: function(d) { return Date.ext.util.xPad(parseInt(Date.ext.util.G(d)/100, 10), 0); },
+	G: function(d) {
+			var y = d.getFullYear();
+			var V = parseInt(Date.ext.formats.V(d), 10);
+			var W = parseInt(Date.ext.formats.W(d), 10);
+
+			if(W > V) {
+				y++;
+			} else if(W===0 && V>=52) {
+				y--;
+			}
+
+			return y;
+		},
+	H: ['getHours', '0'],
+	I: function(d) { var I=d.getHours()%12; return Date.ext.util.xPad(I===0?12:I, 0); },
+	j: function(d) {
+			var ms = d - new Date('' + d.getFullYear() + '/1/1 GMT');
+			ms += d.getTimezoneOffset()*60000;
+			var doy = parseInt(ms/60000/60/24, 10)+1;
+			return Date.ext.util.xPad(doy, 0, 100);
+		},
+	m: function(d) { return Date.ext.util.xPad(d.getMonth()+1, 0); },
+	M: ['getMinutes', '0'],
+	p: function(d) { return Date.ext.locales[d.locale].p[d.getHours() >= 12 ? 1 : 0 ]; },
+	P: function(d) { return Date.ext.locales[d.locale].P[d.getHours() >= 12 ? 1 : 0 ]; },
+	S: ['getSeconds', '0'],
+	u: function(d) { var dow = d.getDay(); return dow===0?7:dow; },
+	U: function(d) {
+			var doy = parseInt(Date.ext.formats.j(d), 10);
+			var rdow = 6-d.getDay();
+			var woy = parseInt((doy+rdow)/7, 10);
+			return Date.ext.util.xPad(woy, 0);
+		},
+	V: function(d) {
+			var woy = parseInt(Date.ext.formats.W(d), 10);
+			var dow1_1 = (new Date('' + d.getFullYear() + '/1/1')).getDay();
+			var idow = woy + (dow1_1 > 4 || dow1_1 <= 1 ? 0 : 1);
+			if(idow == 53 && (new Date('' + d.getFullYear() + '/12/31')).getDay() < 4)
+			{
+				idow = 1;
+			}
+			else if(idow === 0)
+			{
+				idow = Date.ext.formats.V(new Date('' + (d.getFullYear()-1) + '/12/31'));
+			}
+
+			return Date.ext.util.xPad(idow, 0);
+		},
+	w: 'getDay',
+	W: function(d) {
+			var doy = parseInt(Date.ext.formats.j(d), 10);
+			var rdow = 7-Date.ext.formats.u(d);
+			var woy = parseInt((doy+rdow)/7, 10);
+			return Date.ext.util.xPad(woy, 0, 10);
+		},
+	y: function(d) { return Date.ext.util.xPad(d.getFullYear()%100, 0); },
+	Y: 'getFullYear',
+	z: function(d) {
+			var o = d.getTimezoneOffset();
+			var H = Date.ext.util.xPad(parseInt(Math.abs(o/60), 10), 0);
+			var M = Date.ext.util.xPad(o%60, 0);
+			return (o>0?'-':'+') + H + M;
+		},
+	Z: function(d) { return d.toString().replace(/^.*\(([^)]+)\)$/, '$1'); },
+	'%': function(d) { return '%'; }
+};
+Date.ext.aggregates = {
+	c: 'locale',
+	D: '%m/%d/%y',
+	h: '%b',
+	n: '\n',
+	r: '%I:%M:%S %p',
+	R: '%H:%M',
+	t: '\t',
+	T: '%H:%M:%S',
+	x: 'locale',
+	X: 'locale'
+};
+Date.ext.aggregates.z = Date.ext.formats.z(new Date());
+Date.ext.aggregates.Z = Date.ext.formats.Z(new Date());
+Date.ext.unsupported = { };
+function strftime(fmt, thisTime)
+{
+    var thisDate = new Date();
+    thisDate.setTime(thisTime / 1000);
+
+    if(!(thisDate.locale in Date.ext.locales))
+    {
+	if(thisDate.locale.replace(/-[a-zA-Z]+$/, '') in Date.ext.locales)
+	{
+	    thisDate.locale = thisDate.locale.replace(/-[a-zA-Z]+$/, '');
+	}
+	else
+	{
+	    thisDate.locale = 'en-US';
+	}
+    }
+
+    var d = thisDate;
+    while(fmt.match(/%[cDhnrRtTxXzZ]/))
+    {
+	fmt = fmt.replace(/%([cDhnrRtTxXzZ])/g, function(m0, m1)
+        {
+	    var f = Date.ext.aggregates[m1];
+	    return (f == 'locale' ? Date.ext.locales[d.locale][m1] : f);
+	});
+    }
+
+    var str = fmt.replace(/%([aAbBCdegGHIjmMpPSuUVwWyY%])/g, function(m0, m1) 
+    {
+	var f = Date.ext.formats[m1];
+	if(typeof(f) == 'string') {
+	    return d[f]();
+	} else if(typeof(f) == 'function') {
+	    return f.call(d, d);
+	} else if(typeof(f) == 'object' && typeof(f[0]) == 'string') {
+	    return Date.ext.util.xPad(d[f[0]](), f[1]);
+	} else {
+	    return m1;
+	}
+    });
+    d=null;
+    return str;
+};
+
+// End of code from Philip S Tellis
+
 
 // Error handling
 
diff --git a/src/settings.sml b/src/settings.sml
index 4d0e289f..23860b31 100644
--- a/src/settings.sml
+++ b/src/settings.sml
@@ -206,6 +206,7 @@ val basisM = foldl (fn ((k, v : string), m) => M.insert (m, ("Basis", k), v)) M.
 val jsFuncsBase = basisM [("alert", "alert"),
                           ("stringToTime", "stringToTime"),
                           ("stringToTime_error", "stringToTime_error"),
+                          ("timef", "strftime"),
                           ("confirm", "confrm"),
                           ("get_client_source", "sg"),
                           ("current", "scur"),
diff --git a/tests/timef.ur b/tests/timef.ur
new file mode 100644
index 00000000..1e473482
--- /dev/null
+++ b/tests/timef.ur
@@ -0,0 +1,12 @@
+fun main () : transaction page =
+    date <- source "";
+    format <- source "";
+    return <xml><body>
+      <ctextbox source={date}/>
+      <ctextbox source={format}/>
+      <dyn signal={d <- signal date;
+                   f <- signal format;
+                   return (case read d of
+                               None => <xml/>
+                             | Some d => <xml>{[timef f d]}</xml>)}/>
+    </body></xml>
-- 
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