entities

{
    "ha:system:peer-interface": {
        "config": {
            "name": "peer-interface",
            "id": "peer-interface",
            "zone": "Home"
        },
        "platform": "ha",
        "type": "system",
        "features": {
            "info": {
                "state": null,
                "primary": true,
                "record": false,
                "icon": "eye",
                "type": "sensor",
                "name": "info",
                "label": "peer-interface: info"
            }
        },
        "primaryFeature": "info"
    },
    "ha:system:clock": {
        "config": {
            "module": "clock",
            "zone": "Main",
            "id": "clock"
        },
        "platform": "ha",
        "type": "system",
        "features": {
            "dateTime12": {
                "state": "Sep 4th 21, 11:40 AM",
                "primary": true,
                "record": false,
                "icon": "eye",
                "type": "sensor",
                "name": "dateTime12",
                "label": "undefined: dateTime12"
            },
            "dateTime24": {
                "state": "Sep 4th 21, 11:40 AM",
                "primary": false,
                "record": false,
                "icon": "eye",
                "type": "sensor",
                "name": "dateTime24",
                "label": "undefined: dateTime24"
            },
            "year": {
                "state": "2021",
                "primary": false,
                "record": false,
                "icon": "eye",
                "type": "sensor",
                "name": "year",
                "label": "undefined: year"
            },
            "month": {
                "state": "September",
                "primary": false,
                "record": false,
                "icon": "eye",
                "type": "sensor",
                "name": "month",
                "label": "undefined: month"
            },
            "day": {
                "state": "4",
                "primary": false,
                "record": false,
                "icon": "eye",
                "type": "sensor",
                "name": "day",
                "label": "undefined: day"
            },
            "weekday": {
                "state": "Saturday",
                "primary": false,
                "record": false,
                "icon": "eye",
                "type": "sensor",
                "name": "weekday",
                "label": "undefined: weekday"
            },
            "hour24": {
                "state": "11",
                "primary": false,
                "record": false,
                "icon": "eye",
                "type": "sensor",
                "name": "hour24",
                "label": "undefined: hour24"
            },
            "hour12": {
                "state": "11",
                "primary": false,
                "record": false,
                "icon": "eye",
                "type": "sensor",
                "name": "hour12",
                "label": "undefined: hour12"
            },
            "minute": {
                "state": "40",
                "primary": false,
                "record": false,
                "icon": "eye",
                "type": "sensor",
                "name": "minute",
                "label": "undefined: minute"
            },
            "period12": {
                "state": "AM",
                "primary": false,
                "record": false,
                "icon": "eye",
                "type": "sensor",
                "name": "period12",
                "label": "undefined: period12"
            }
        },
        "primaryFeature": "dateTime12"
    }
}

@notato8 please write a function to extract only the unique zones.

function getZones(entities = {}) {
    return ( 
        Object.values(entities)
        .map(entity => {
            return entity.config.zone;
        }).filter((zone, i, self) => {
            return self.indexOf(zone) == i;
        })
    )
}

function getEntitiesByZone(entities = {}, zone = "") {
    return (
        Object.fromEntries(
            Object.entries(entities)
            .filter(([key, value]) => {
                return value.config.zone == zone;
            })
        )
    )
}