how to update template or campaign status to draft or programmed in mailjet

I use mailjet in my php program to send mails to my receivers. I use templates (or known as campaigns) as content of my mail. My code is ..

$ch         =   curl_init();
$content    =   "https://api.mailjet.com/v3/REST/newsletter/3594662/send";
curl_setopt($ch, CURLOPT_URL,$content);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_FTPLISTONLY, 1);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1); 
curl_setopt($ch, CURLOPT_USERPWD, "myapi:mypassword");
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: application/json')); 
$server_output1 = curl_exec ($ch);
# Close curl process
curl_close ($ch);

Note: I am hardcoding the template id (id:3594662) in my program. And the problem is .. Once i sent a mail , that template's status will change to "sent". So if i send another mail using the same template(id:3594662) i will get error message like this:

"errmessage": "Newsletter has to be in status draft or programmed",
"statuscode": "400

Please help me how to update the status of template to "draft or programmed".. Advance Thanks for the replies..

Solution

I'm leading Developers Relations at Mailjet. Thanks for having chosen us to power your email!

As far as I see, there is a confusion about the role of the newsletter API resource. This resource represents a single newsletter / campaign object in the system, not a re-usable template as you're expecting. This is a feature we're working on and which will be live in few weeks from now.

In your case, you will need to re-create the newsletter from scratch, following our API guide, like you're already doing I guess.

Sorry about the inconvenience. Please remain confident that we're working on improving this ASAP.

Hope this helps!