stream-chat-react-native-core/lib/commonjs/components/MessageList/hooks/useMessageList.js

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

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.useMessageList = void 0;
var _react = require("react");
var _PaginatedMessageListContext = require("../../../contexts/paginatedMessageListContext/PaginatedMessageListContext");
var _ThreadContext = require("../../../contexts/threadContext/ThreadContext");
var _hooks = require("../../../hooks");
function _createForOfIteratorHelperLoose(r, e) { var t = "undefined" != typeof Symbol && r[Symbol.iterator] || r["@@iterator"]; if (t) return (t = t.call(r)).next.bind(t); if (Array.isArray(r) || (t = _unsupportedIterableToArray(r)) || e && r && "number" == typeof r.length) { t && (r = t); var o = 0; return function () { return o >= r.length ? { done: !0 } : { done: !1, value: r[o++] }; }; } throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }
function _unsupportedIterableToArray(r, a) { if (r) { if ("string" == typeof r) return _arrayLikeToArray(r, a); var t = {}.toString.call(r).slice(8, -1); return "Object" === t && r.constructor && (t = r.constructor.name), "Map" === t || "Set" === t ? Array.from(r) : "Arguments" === t || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(t) ? _arrayLikeToArray(r, a) : void 0; } }
function _arrayLikeToArray(r, a) { (null == a || a > r.length) && (a = r.length); for (var e = 0, n = Array(a); e < a; e++) n[e] = r[e]; return n; }
var useMessageList = params => {
  var threadList = params.threadList,
    isLiveStreaming = params.isLiveStreaming,
    _params$isFlashList = params.isFlashList,
    isFlashList = _params$isFlashList === void 0 ? false : _params$isFlashList;
  var _usePaginatedMessageL = (0, _PaginatedMessageListContext.usePaginatedMessageListContext)(),
    messages = _usePaginatedMessageL.messages,
    viewabilityChangedCallback = _usePaginatedMessageL.viewabilityChangedCallback;
  var _useThreadContext = (0, _ThreadContext.useThreadContext)(),
    threadMessages = _useThreadContext.threadMessages;
  var messageList = threadList ? threadMessages : messages;
  var processedMessageList = (0, _react.useMemo)(() => {
    var newMessageList = [];
    for (var _iterator = _createForOfIteratorHelperLoose(messageList), _step; !(_step = _iterator()).done;) {
      var message = _step.value;
      if (isFlashList) {
        newMessageList.push(message);
      } else {
        newMessageList.unshift(message);
      }
    }
    return newMessageList;
  }, [messageList, isFlashList]);
  var data = (0, _hooks.useRAFCoalescedValue)(processedMessageList, isLiveStreaming);
  return (0, _react.useMemo)(() => ({
    processedMessageList: data,
    rawMessageList: messageList,
    viewabilityChangedCallback
  }), [data, messageList, viewabilityChangedCallback]);
};
exports.useMessageList = useMessageList;
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