Zigbee groups handling

let allGroupMembers = null;

function getGroupMembers() {
    let groupMembers = {};
    let devsWithGroup = $('zigbee.0.*.groups');
    devsWithGroup.each(function(stateid) {
        if(stateid.indexOf('zigbee.0.info.') === 0) {
            return this;
        }

        let deviceGroups = getState(stateid).val;
        if(!deviceGroups) {
            return this;
        }
        deviceGroups = JSON.parse(deviceGroups);
        if(!deviceGroups) {
            return this;
        }
        let deviceId = stateid.substr(0, stateid.length - 7);
        let groupIdx;
        for(let i = 0; i < deviceGroups.length; i++) {
            groupIdx = 'group_' + deviceGroups[i];
            if(!groupMembers[groupIdx]) {
                groupMembers[groupIdx] = [];
            }
            groupMembers[groupIdx].push(deviceId);
        }
    });

    return groupMembers;
}

function checkDeviceGroups(deviceId, attribute, keepMembers) {
    if(!keepMembers) {
        // (re-)read group members
        allGroupMembers = getGroupMembers();
    }

    let groupsToCheck = [];

    log('checkDeviceGroups(' + deviceId + ', ' + attribute + ')', 'debug');

    if(deviceId.indexOf('zigbee.0.group_') === 0) {
        // this is a group
        let groupIdx = deviceId.replace(/^zigbee\.0\./, '');
        for(let m = 0; m < allGroupMembers[groupIdx].length; m++) {
            checkDeviceGroups(allGroupMembers[groupIdx][m], attribute, true);
        }
    } else {
        // this is a device
        let deviceGroups = getState(deviceId + '.groups').val;
        deviceGroups = JSON.parse(deviceGroups);
        for(let i = 0; i < deviceGroups.length; i++) {
            log('Need to check group ' + deviceGroups[i] + ' which I am a member of.', 'debug');
            groupsToCheck.push(deviceGroups[i]);
        }
    }

    for(let i = 0; i < groupsToCheck.length; i++) {
        let group = groupsToCheck[i];
        let groupIdx = 'group_' + group;

        if(!allGroupMembers[groupIdx]) {
            log('Group ' + groupIdx + ' checked has no members. This should not happen.', 'warn');
        } else {
            let sameStates = true;
            let sameStateValue = null;
            let stateValue;
            let curDevice;
            for(let m = 0; m < allGroupMembers[groupIdx].length; m++) {
                curDevice = allGroupMembers[groupIdx][m];
                stateValue = getState(curDevice + '.' + attribute).val;
                if(sameStateValue === null || sameStateValue === stateValue) {
                    sameStateValue = stateValue;
                } else {
                    sameStates = false;
                    break;
                }
            }

            if(sameStates === true && sameStateValue !== null) {
                setState('zigbee.0.' + groupIdx + '.' + attribute, sameStateValue, true);
                log('checkDeviceGroups: All members of ' + groupIdx + ' have same state. Setting group attribute ' + attribute + ' to ' + sameStateValue);
            }
        }
    }
}

on({id: /^zigbee\.0\..*\.(state|brightness|transition_time)$/, change: 'any', ack: false}, function(obj) {
    let match = obj.id.match(/^(zigbee\.0\..*)\.(state|brightness|transition_time)$/);
    if(!match) {
        return;
    }

    let deviceId = match[1];
    let deviceAttr = match[2];

    if(deviceAttr === 'state') {
        // handle switch on/off
        if(obj.state.val === true) {
            let curBright = getState(deviceId + '.brightness').val;
            if(curBright < 10) {
                setState(deviceId + '.brightness', 100);
            }
        }
    } else if(deviceAttr === 'brightness') {
        // handle brightness changes
        let curState = getState(deviceId + '.state').val;
        if(obj.state.val < 10 && curState) {
            setState(deviceId + '.state', false); // need ack = false to trigger group check
        } else if(obj.state.val >= 10 && !curState) {
            setState(deviceId + '.state', true); // need ack = false to trigger group check
        }
    }

    checkDeviceGroups(deviceId, deviceAttr);
});