function _participantJoinedOrUpdated()

in react/features/base/participants/middleware.js [458:506]

• 30 lines of code
• 15 McCabe index (conditional complexity)

function _participantJoinedOrUpdated(store, next, action) {
    const { dispatch, getState } = store;
    const { participant: { avatarURL, email, id, local, name, raisedHandTimestamp } } = action;

    // Send an external update of the local participant's raised hand state
    // if a new raised hand state is defined in the action.
    if (typeof raisedHandTimestamp !== 'undefined') {

        if (local) {
            const { conference } = getState()['features/base/conference'];
            const rHand = parseInt(raisedHandTimestamp, 10);

            // Send raisedHand signalling only if there is a change
            if (conference && rHand !== getLocalParticipant(getState()).raisedHandTimestamp) {
                conference.setLocalParticipantProperty('raisedHand', rHand);
            }
        }
    }

    // Allow the redux update to go through and compare the old avatar
    // to the new avatar and emit out change events if necessary.
    const result = next(action);

    // Only run this if the config is populated, otherwise we preload external resources
    // even if disableThirdPartyRequests is set to true in config
    if (Object.keys(getState()['features/base/config']).length) {
        const { disableThirdPartyRequests } = getState()['features/base/config'];

        if (!disableThirdPartyRequests && (avatarURL || email || id || name)) {
            const participantId = !id && local ? getLocalParticipant(getState()).id : id;
            const updatedParticipant = getParticipantById(getState(), participantId);

            getFirstLoadableAvatarUrl(updatedParticipant, store)
                .then(url => {
                    dispatch(setLoadableAvatarUrl(participantId, url));
                });
        }
    }

    // Notify external listeners of potential avatarURL changes.
    if (typeof APP === 'object') {
        const currentKnownId = local ? APP.conference.getMyUserId() : id;

        // Force update of local video getting a new id.
        APP.UI.refreshAvatarDisplay(currentKnownId);
    }

    return result;
}