Broadcast Google Home alarms & timers

const defaults = {
    timer: {
        items: 'timers',
        name: 'timer'
    },
    alarm: {
        items: 'alarms',
        name: 'alarms'
    }
}
const mediaPlayers = env.get('media_players');
const mode = env.get('mode');
let type = '';
let callService = {}

if(!msg.data || !mediaPlayers || !mode) {
    return null;
}

if(mode === 'tts') {
    callService = {
        domain: 'tts',
        service: 'google_translate_say',
        data: {
            entity_id: '',
            message: '',    
        }
    }
} else if (mode === 'mp3') {
    if(!env.get('file')) {
        return null;
    }
    callService = {
        domain: 'media_player',
        service: 'play_media',
        data: {
            entity_id: '',            
            media_content_id: env.get('file'),
            media_content_type: 'music',
        }
    }
}


// Determine type: alarm or timer
if(typeof msg.data.new_state.attributes.timers !== 'undefined' || typeof msg.data.old_state.attributes.timers !== 'undefined' ) {
    type = 'timer';
} else if (typeof msg.data.new_state.attributes.alarms !== 'undefined' || typeof msg.data.old_state.attributes.alarms !== 'undefined') {
    type = 'alarm';
} else {
    return null;
}

const typeValues = defaults[type];
const activeItem = (msg.data.new_state.attributes[typeValues.items] || []).find(item => item.status === 'ringing');
if (!activeItem) {
    return null;
}


mediaPlayers.trim().split(/,\s*/).forEach(player => {
    if(!player) return;
    callService.data.entity_id = player;
    if(mode === 'tts') {
        const deviceName = env.get('name') || msg.data.new_state.attributes.friendly_name;
        const ttsMsg = `${activeItem.label || ''} ${typeValues.name} RINGING on ${deviceName}`;
        callService.data.message = ttsMsg;
    }

    const message = {
        payload: callService
    };
    node.send(message);
});

// All done
node.done();