online / offline webtag for htm

Darknstormy · Post by **Darknstormy** » Wed 29 Jun 2011 1:09 pm

Hey,

ok so let me explain... can you have a menu option in the program that's "Shutdown & offline" So it Uploads to your webpage before it shuts the program down setting the webtag to offline.

and when you open the program, the first upload will change the Offline webtag to online...

understand? lol

Cheers

Post by **steve** » Wed 29 Jun 2011 1:42 pm

Yes, I understand. It's a bit tricky, though, as the web update code runs asynchronously in the background, so I would have to try to co-ordinate that final web update with the close down. And what if it was already in the middle of a web update when it closed down?

This is really what the <#update> web tag is for, to tell the viewer when the last update occurred and hence whether the data is currently valid. To make it more obvious, a bit of javascript could compare the <#update> time with the current time and display a message based on how long ago the last update was - perhaps also using the <#interval> tag.

Darknstormy · Post by **Darknstormy** » Wed 29 Jun 2011 10:01 pm

Arrrr yeah I knew it prob wouldn't be the easiest thing.. Well since I know nothing about web page coding apart from the basics.. Ill put out there to everyone, how can I make a flashing light or online offline picture on my webpage so people know if its online or offline with out studying the last update time.. via javascript as Steve Suggested.

beteljuice · Post by **beteljuice** » Thu 30 Jun 2011 2:22 am

This is very awkward to do with JavaScript because Cumulus does not provide an UTC time code.
JS can look at the UTC time difference of a visitors browser, but you would have to enter your local GMT difference, and remember to change it when / if Daylight Savings are applied.

This is one of those things that PHP (serverside code) would be much better at, not least of which it can simply 'inspect' when the file was last modified and compare it eg. interval x 2 using the same (server) clock.

Post by **steve** » Thu 30 Jun 2011 7:24 am

beteljuice wrote:This is very awkward to do with JavaScript because Cumulus does not provide an UTC time code.

I've added <#timeUTC> to the next build. Formatting can be applied.

Darknstormy · Post by **Darknstormy** » Thu 30 Jun 2011 7:30 am

Awesome, Thanks Steve... now we just need a clever little cat to write a script up for it

beteljuice · Post by **beteljuice** » Fri 01 Jul 2011 1:09 am

EDIT: Doesn't work ! - For Information ONLY
See: https://cumulus.hosiene.co.uk/viewtopic.p ... 963#p46963

Unproven, untested, and unlikely to work first time

Don't forget you can't try it until Steve introduces the <#timeUTC> webtag !!!

Edit #1: missing hh (hours formating) added.
Edit #2: then - getTime corrected
Edit #3: now_utc - getUTCDate added
Edit #4: output code rewritten

In the <head> section of your xxxxT.htm

Code: Select all

<script type="text/javascript">
<!--
// Javascript Cumulus update checker - betejuice v1.4 (open) July 2011
// set these variables to suit
var missed = 2; // Number of updates to miss before deciding "offline"
var online_pic = "myimages/online.gif"; // location of ONline image
var online_txt = "Station ON-line"; // your ONline text
var offline_pic = "myimages/offline.gif"; // location of OFFline image
var offline_txt = "Station OFF-line"; // your OFFline text
// END user vars

var now = new Date();
var now_utc = Date.UTC(now.getUTCFullYear(), now.getUTCMonth(), now.getUTCDate(), now.getUTCHours(), now.getUTCMinutes(), now.getUTCSeconds());

var then_month = <#timeUTC format=mm> -1;
var then = new Date(<#timeUTC format=yyyy>, then_month, <#timeUTC format="dd', 'hh', 'mm', 'ss">);
then = then.getTime();
var timetodie = <#interval> * missed * 60000; // milliseconds per minute

if(now_utc - then < timetodie){
	status_pic = online_pic;
	status_txt = online_txt;
} else {
	status_pic = offline_pic;
	status_txt = offline_txt;
}
-->
</script>

Then in the <body> section where / when required

Code: Select all

<script type="text/javascript">
<!--
// for the image (when / where required)
document.write("<img src=\"" + status_pic + "\" alt=\"test\" title=\"" + status_txt + "\" />");
// for the text (when / where required)
document.write(status_txt);
-->
</script>

Darknstormy · Post by **Darknstormy** » Fri 01 Jul 2011 1:21 am

You're a machine... thanks heaps... I shall give it a shot once the next release comes out

mcrossley · Post by **mcrossley** » Fri 01 Jul 2011 12:08 pm

I think there is a slight error in beteljuice's code.

Code: Select all

var then = getTime( new Date(<#timeUTC format=yyyy>, then_month, <#timeUTC format="dd', 'mm', 'ss">));

should be:

Code: Select all

var then = getTime( new Date(<#timeUTC format=yyyy>, then_month, <#timeUTC format="dd, hh, mm, ss">));

How about some alternative code (again untested):

Code: Select all

var now  = new Date();
var then = new Date();

then.setUTCFullYear(<#timeUTC format=yyyy>, (<#timeUTC format=mm> -1), <#timeUTC format=dd>);
then.setUTCHours(<#timeUTC format="hh, mm, ss">));

var timetodie = <#interval> * missed * 60000; // milliseconds per minute

if(now - then < timetodie){
   status_pic = online_pic;
   status_txt = online_txt;
} else {
   status_pic = offline_pic;
   status_txt = offline_txt;
}

beteljuice · Post by **beteljuice** » Fri 01 Jul 2011 3:24 pm

I haven't done any formating, but I believe I read somewhere:
" " if o/p contains spaces, and ' ' for anything you don't want parsed - so I think it might be right

In the alternative code nothing has been done to convert 'browser' now time to UTC ?

mcrossley · Post by **mcrossley** » Fri 01 Jul 2011 3:39 pm

Ah, OK, so the ', ' is still needed - I wondered why they were there! But the Hours are still missing?

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var then = getTime( new Date(<#timeUTC format=yyyy>, then_month, <#timeUTC format="dd', 'mm', 'ss">));

should be (EDIT: It was still wrong, minutes are nn!)

Code: Select all

var then = getTime( new Date(<#timeUTC format=yyyy>, then_month, <#timeUTC format="dd', 'hh', 'nn', 'ss">));

My version does not explicity set the now UTC, I don't believe you need to. The Date object contains the local time and the UTC offset. So..

Code: Select all

now = new Date();
yer = now.getUTCFullYear();
mon = now.getUTCMonth();
etc...

Will have the correct UTC values for 'yer', 'mon' etc.

I've had to use the Date() object far too much in the past for all my Moon position calculations which heavily rely on converting the users local time to UTC.

Post by **steve** » Fri 01 Jul 2011 3:54 pm

beteljuice wrote:" " if o/p contains spaces, and ' ' for anything you don't want parsed - so I think it might be right

The single quotes are optional in this case as the strings they are enclosing aren't formatting characters (the documentation doesn't state this explicitly, I simply copied it from the Delphi documentation). I think Mark's point is that you have missed out the hour specifier.

Post by **steve** » Fri 01 Jul 2011 3:56 pm

mcrossley wrote:It was still wrong, minutes are nn!

mm is minutes, after hh. Kind of stupid but clever at the same time.

mcrossley · Post by **mcrossley** » Fri 01 Jul 2011 3:58 pm

Doh! This formatting is all too complicated

I'll try and update the Wiki to reflect some of this - if I can find the right words

Edit: I'll try reading the Wiki first - its already in there

beteljuice · Post by **beteljuice** » Fri 01 Jul 2011 10:25 pm

Doh likewise missing the hh (hours) - code to be proven yet anyways

I can't check it because I'm not running my station, so not running Cumulus, so can't see if the processed formating / parsing is doing what I thought

The original code has been edited to include hh parsing - Thanks for the heads up.

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online / offline webtag for htm

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