Can Extendscript see if an effect is missing?

Question

My coworkers asked me to write a script that finds which layers have missing effects. I can search through every layer > every comp > Effects property > return every effect. I was hoping the name value would match how it's displayed in the timeline (e.g., "Missing: Edge Blur"), but it just displays the effect's name ("Edge Blur"). Is there any property that would return a value that would tell you whether the effect is missing or not?

Tomas Sinkunas · Answer

One way to go about it is to collect all installed effects and then loop through to see if effects in question is in the array;

var effectInQuesstion = "ADBE Blend";
var installedEffects = getInstalledEffects();
if (contains(installedEffects, effectInQuesstion)) {
    alert("Effect " + effectInQuesstion + " is installed");
} else {
    alert("Effect " + effectInQuesstion + " is not installed");
}
function getInstalledEffects() {
    var installedEffects = [];
    for (var i = 0, il = app.effects.length; i < il; i ++) {
        installedEffects.push(app.effects.matchName);
    }
    return installedEffects;
}
function contains(array, string) {
    for (var i = 0, il = array.length; i < il; i ++) {
        if (array === string) {
            return true;
        }
    }
    return false;
}

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