Check if Layer Has Specific Effect Applied To It

[johnt53984649]

In extendscript, how can I check if a layer has a specific effect applied to it?  For example, suppose I want to check if a given layer has the "motion tile" effect applied to it.  Essentially, this is the pseudocode of what I want:

var layer_number = 1;
if (app.project.item(1).layer(layer_number) has motion tile applied)
{
  alert("It does!");
}
else
{
  add motion tile effect to app.project.item(1).layer(layer_number);
}

Can somebody please help me translate this pseudocode into real code that extendscript will recognize for After Effects?  Thanks.

[Dan Ebberts · Accepted solution]

Something like this:

var myLayer = app.project.activeItem.layer(1);

var hasEffect = false;

for (var i = 1; i <= myLayer.property("Effects").numProperties; i++){

  if (myLayer.property("Effects").property(i).matchName == "ADBE Tile"){

    alert ("It does!");

    hasEffect = true;

    break;

  }

}

if (! hasEffect){

  myLayer.property("Effects").addProperty("ADBE Tile");

}

Dan

[johnt53984649]

Perfect, thank you very much!