Reverse Layer Order.sketchplugin

// This plugin reverses the positions of selected layers.

#import 'inventory.js'

var _selection = null;
var leftPositions = [];
var topPositions = [];
var layersMeta = [];

// Run
if (selection.count() > 1) {

    // remember the selection
    _selection = selection;

    // sort selected layers
    sortLayers(selection);
} else if (selection.count() == 1 && selection[0].children().count() > 0){

    // remember the selection
    _selection = selection;

    var group = _selection[0];
    // sort selected group
    sortLayers(group.layers().array());
} else {
    [doc showMessage:"Cannot sort single layers."]
}

// Main
inventory.layers.reverseLayerOrder(layersMeta);
inventory.layers.select(_selection);


// Sorting
function sortLayers (layers) {

    // Loop through all selected layers

    for (var i = 0; i < layers.count(); i++) {
        var layer = layers[i];

        layersMeta.push({
            "name": layer.name(),
            "layer": layer
        });

    }
}

// Sorts numbers. By default, sort would handle numbers as strings and thus not sort them as intended.
function sortNumber(a,b) {
    return a - b;
}