IKEA Shortcut Button

// This function is for use in Node-Red within Home Assistant for the IKEA
// Trafdri Shortcut Button (or similar device from other manufacturers). The
// function can turn toggle a light (or group of lights) based on how the
// button was pressed: single press, double press, or press and hold.

// Usage: An Events: All node with an Event Type of zha_event is used to handle
// the events. It is connected to a Switch node with a Property of
// msg.payload.event.device_ieee. The outputs correspond to the device_ieee of
// the remote being used. This allows for multiple remotes to use different
// functions. The output is connected to this Function node. Multiple outputs
// can be connected to this function. The output is connected to an empty
// Service Call node.

// The function requires an entities to be defined. A group defined in Home
// Assistant can also be used to control multiple lights simultaneously. To
// disable a specific button press, replace the entity name with double quotes
// ("").

var single_press_entity = "light.stove";
var double_press_entity = "light.kitchen";
var push_and_hold_entity = "group.kitchen";

// Assign output variable based on how the button was pressed
var output_entity = "";
switch(msg.payload.event.command) {
    case "toggle":
        output_entity = single_press_entity;
        break;
    case "on":
        output_entity = double_press_entity;
        break;
    case "off":
        output_entity = push_and_hold_entity;
        break;
}

// Payload to be passed to service call node
msg.payload = {domain: "light", service: "toggle",
    data: {
        entity_id: output_entity, }
    };

return msg;