Check if layer is selected

Question

Hello guys i'm currently facing a problem here, i want to check if photoshop is currently selected a group , if yes run the function, if not alert the feedback but i don't know why it not working this is the code i wrote

#target photoshop

// Function to check if a layer is selected
function isLayerSelected() {
    var ref = new ActionReference();
    ref.putEnumerated(charIDToTypeID("Dcmn"), charIDToTypeID("Ordn"), charIDToTypeID("Trgt"));
    return executeActionGet(ref).hasKey(stringIDToTypeID("targetLayers"));
}

// Main function
function main() {
    if (isLayerSelected()) {
        // Call your function here if a layer is selected
        loadFunction();
    } else {
        // Display a warning if no layer is selected
        alert("No layer is currently selected.");
    }
}

// Function to be called when a layer is selected
function loadFunction() {
     app.doAction("Test", "CGIBA");
}
app.activeDocument.suspendHistory("Test", "func2()");

Stephen Marsh · Accepted Answer

Is there a possibility that no layers or groups would be selected? I ask because there is a scripting limitation (bug) that reports the top layer as selected when no layers are selected!

alert(activeDocument.activeLayer.name);

@jazz-y offered a solution:

// by jazz-y
s2t = stringIDToTypeID;
(r = new ActionReference()).putProperty(s2t('property'), p = s2t('targetLayers'));
r.putEnumerated(s2t("document"), s2t("ordinal"), s2t("targetEnum"));
if (executeActionGet(r).getList(p).count) {
    alert('layers selected');
} else {
    alert('no layers selected');
}

Therefore, combining the code from both @jazz-y and @c.pfaffenbichler –

s2t = stringIDToTypeID;
(r = new ActionReference()).putProperty(s2t('property'), p = s2t('targetLayers'));
r.putEnumerated(s2t("document"), s2t("ordinal"), s2t("targetEnum"));
if (executeActionGet(r).getList(p).count) {
    if (activeDocument.activeLayer.typename == "LayerSet") {
        alert("is group");
    } else {
        alert("is layer");
    }
} else {
    alert('no layers selected');
}

c.pfaffenbichler · Answer

One can even use DOM code to determine if the active layer is a group. if (activeDocument.activeLayer.typename == "LayerSet") {alert ("is group")}else {alert ("is not group")}

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