stream-chat-react-native-core/lib/module/contexts/channelsStateContext/useChannelState.js

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

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.useChannelState = useChannelState;
exports.useStateManager = useStateManager;
var _slicedToArray2 = _interopRequireDefault(require("@babel/runtime/helpers/slicedToArray"));
var _react = require("react");
var _ChannelsStateContext = require("./ChannelsStateContext");
function useStateManager({
  cid,
  key,
  setState,
  state
}, initialValue) {
  var _state$cid;
  var memoizedInitialValue = (0, _react.useMemo)(() => initialValue, []);
  var value = ((_state$cid = state[cid]) == null ? void 0 : _state$cid[key]) || memoizedInitialValue;
  var setValue = (0, _react.useCallback)(value => setState({
    cid,
    key,
    value
  }), [cid, key]);
  return [value, setValue];
}
function useChannelState(channel, threadId) {
  var _channel$state;
  var cid = (channel == null ? void 0 : channel.id) || 'id';
  var _useChannelsStateCont = (0, _ChannelsStateContext.useChannelsStateContext)(),
    setState = _useChannelsStateCont.setState,
    state = _useChannelsStateCont.state;
  var _useStateManager = useStateManager({
      cid,
      key: 'threadMessages',
      setState,
      state
    }, threadId && (channel == null || (_channel$state = channel.state) == null || (_channel$state = _channel$state.threads) == null ? void 0 : _channel$state[threadId]) || []),
    _useStateManager2 = (0, _slicedToArray2.default)(_useStateManager, 2),
    threadMessages = _useStateManager2[0],
    setThreadMessagesInternal = _useStateManager2[1];
  var setThreadMessages = (0, _react.useCallback)(value => setThreadMessagesInternal([...value]), [setThreadMessagesInternal]);
  return {
    setThreadMessages,
    threadMessages
  };
}
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