'sendCmd('save "' + playlistname + '"')' return? (Solved)

irishwill2008

Hi there,

If i add a playlist that already exists. I.E: I add a playlist with the name test, i then try to add another playlist forgetting i already named one test but when i try add test it doesnt add it or replaces, not sure.

But i want it to display a message saying it already exists!
Thing is, it doesnt return true or false.. Not sure what it returns and cant find the save command reference. I checked command/index.php but not in there.

My code:

$('#modal-pl-save-btn').click(function(){
	var playlistname = $('#pl-save-name').val();
	if (playlistname != "")
	{
		if (sendCmd('save "' + playlistname + '"'))
		{
		        new PNotify({
			          title: 'Success',
			          text: 'Playlist Added',
			          icon: 'fa fa-check',
			          delay: 3000
		       });
		}
		else
		{
			new PNotify({
				title: 'Error',
				text: 'Playlist Exists!',
				icon: 'fa fa-exclamation-circle',
				delay: 3000
			});
		}
	}
	else
	{
		new PNotify({
			title: 'Warning',
			text: 'Please Input A Name',
			icon: 'fa fa-exclamation-circle',
			delay: 3000
		});
	}
});

surfninja

I don't know python but a quick google found this.

you might want to check if the playlist exists before calling sendCmd to create a new list.

irishwill2008

SurfNinja, didnt think of that! What a great idea xD Will give that a shot, i could use some JS to check if it exists or not anyway

Great call on the file check!

I was just doing a simple fail / success check guessing the system knows it encounters the issue - failing the command but honestly dont know what it returns so..

Thanks!

hondagx35

Hi,

Rune Audio is a client server application and nearly all is done asynchronous.

An example to explain synchronous versus asynchronous:
You are calling your local dealer to ask him if a special product is available.

synchronous:
- you: "Hello, do you have that green round shiny thing available?"
- he: "Sorry i have to check this, please wait"
- you: waiting, waiting ............... hmm .... waiting
- he: "Sorry we only have a blue round dull thing."

asynchronous:
- you: "Hello, do you have that green round shiny thing available?"
- he: "Sorry i have to check this, please wait. Will call you back soon!"
- you: doing something else until he calls back
- he: "Sorry we only have a blue round dull thing."

Saving a playlist is done by passing "mpc save playlistname" to

function sendCmd(inputcmd) {
    $.ajax({
        type: 'GET',
        url: '/command/?cmd=' + inputcmd + '&clientUUID=' + GUI.clientUUID,
        cache: false
    });
}

You have to use the callback mechanism to get a response.
This may look like this

function notify_user(result) {
	if (!result.match("^OK")) {
        new PNotify({
            title: 'Error',
            text: result,
            icon: 'fa fa-exclamation-circle',
            delay: 3000
        });
    }
}

// send a MPD playback control command
function sendCmd(inputcmd) {
    $.ajax({
        type: 'GET',
        url: '/command/?cmd=' + inputcmd + '&clientUUID=' + GUI.clientUUID,
        cache: false,
        success: notify_user
    });
}

Frank

surfninja

Frank, your example is very, very good. Danke! It is always good to know that how the asynchronous communications work through mpc (mpd's client) and not through the file system.