stream-chat-react-native-core/lib/module/hooks/useSelectedChannelState.js

The official React Native and Expo components for Stream Chat, a service for building chat applications

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.useSelectedChannelState = useSelectedChannelState;
var _react = require("react");
var _shim = require("use-sync-external-store/shim");
var noop = () => {};
function useSelectedChannelState({
  channel,
  selector,
  stateChangeEventKeys = ['all']
}) {
  var subscribe = (0, _react.useCallback)(onStoreChange => {
    if (!channel) {
      return noop;
    }
    var subscriptions = stateChangeEventKeys.map(et => channel.on(et, () => {
      onStoreChange(selector(channel));
    }));
    return () => subscriptions.forEach(subscription => subscription.unsubscribe());
  }, [channel, selector, stateChangeEventKeys]);
  var getSnapshot = (0, _react.useCallback)(() => {
    if (!channel) {
      return undefined;
    }
    return selector(channel);
  }, [channel, selector]);
  return (0, _shim.useSyncExternalStore)(subscribe, getSnapshot);
}
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