Question: Conditional modern extends

[marconett]

I am currently working on integrating support for the Philips EasyAir SNS212/w MC and functionally similar devices.

Here's my current code for this, it generally works fine:

const m = require('zigbee-herdsman-converters/lib/modernExtend');
const philips = require('zigbee-herdsman-converters/lib/philips');

const definition = {
  zigbeeModel: [
    'EasyAir SNS212/w MC',
    'EasyAir SNS212/g MC',
    'EasyAir SNS212/b MC',
    'EasyAir SNS210/w MC',
    'EasyAir SNS210/g MC',
    'EasyAir SNS210/b MC',
    'Xitanium 36W/m 0.15-1.05A 48V MC',
  ],
  model: 'EasyAir SNS21x / Xitanium',
  vendor: 'Philips',
  description: 'Presence detector / Light sensor / Lighting control / Power meter',
  extend: [
    m.deviceEndpoints({ endpoints: { '64': 64, '65': 65, '66': 66, '80': 80, '144': 144 } }),

    m.occupancy({
      endpointNames: ['66'],
      pirConfig: ['otu_delay'],
    }),
    m.electricityMeter({
      endpointNames: ['64'],
      cluster: 'metering',
      power: false
    }),

    // philips.m.light(),
    philips.m.light({ colorTemp: { range: [153, 367] } }),

    m.illuminance({ endpointNames: ['65'] }),
    m.commandsOnOff({ endpointNames: ['144'] }),
    m.commandsLevelCtrl({ endpointNames: ['144'] }),
    m.commandsColorCtrl({ endpointNames: ['144'] })
  ],
  meta: { multiEndpoint: true },
  ota: true
};

module.exports = definition;

The issue I run into, is that if a single channel LED driver is connected to the device, it only supports "Brightness" and if a dual channel LED driver is connected, it additionally supports "Color temp" as well.

I am struggling to find out how to implement this behaviour with modern extends.

It would work like the following pseudo code:

if (endpoint with id 64 has cluster "LColorCtrl") {
  extend.push(philips.m.light({ colorTemp: { range: [153, 367] } }))
} else {
  extend.push(philips.m.light())
}

I know that the configure function of the definition provides the parameter device with which I can access endpoints/clusters, but I couldn't find a way to push to the extend array from there.

Is there a way to do what I'm trying to do with modern extends? Do I maybe need to use non-modern extends?

One more note: The generated_external_definition button in the Webinterface does detect this correctly and generates either philips.m.light() or philips.m.light({ colorTemp: { range: [153, 367] } }), depending on what's connected to the device. Maybe there's a way to leverage this detection mechanism inside my device definition?