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Viewing file:     queriesObserver.js (4.07 KB)      -rw-r--r--

import _inheritsLoose from "@babel/runtime/helpers/esm/inheritsLoose";
import { difference, replaceAt } from './utils';
import { notifyManager } from './notifyManager';
import { QueryObserver } from './queryObserver';
import { Subscribable } from './subscribable';
export var QueriesObserver = /*#__PURE__*/function (_Subscribable) {
  _inheritsLoose(QueriesObserver, _Subscribable);

  function QueriesObserver(client, queries) {
    var _this;

    _this = _Subscribable.call(this) || this;
    _this.client = client;
    _this.queries = [];
    _this.result = [];
    _this.observers = [];
    _this.observersMap = {};

    if (queries) {
      _this.setQueries(queries);
    }

    return _this;
  }

  var _proto = QueriesObserver.prototype;

  _proto.onSubscribe = function onSubscribe() {
    var _this2 = this;

    if (this.listeners.length === 1) {
      this.observers.forEach(function (observer) {
        observer.subscribe(function (result) {
          _this2.onUpdate(observer, result);
        });
      });
    }
  };

  _proto.onUnsubscribe = function onUnsubscribe() {
    if (!this.listeners.length) {
      this.destroy();
    }
  };

  _proto.destroy = function destroy() {
    this.listeners = [];
    this.observers.forEach(function (observer) {
      observer.destroy();
    });
  };

  _proto.setQueries = function setQueries(queries, notifyOptions) {
    this.queries = queries;
    this.updateObservers(notifyOptions);
  };

  _proto.getCurrentResult = function getCurrentResult() {
    return this.result;
  };

  _proto.getOptimisticResult = function getOptimisticResult(queries) {
    var _this3 = this;

    return queries.map(function (options) {
      var defaultedOptions = _this3.client.defaultQueryObserverOptions(options);

      return _this3.getObserver(defaultedOptions).getOptimisticResult(defaultedOptions);
    });
  };

  _proto.getObserver = function getObserver(options) {
    var defaultedOptions = this.client.defaultQueryObserverOptions(options);
    return this.observersMap[defaultedOptions.queryHash] || new QueryObserver(this.client, defaultedOptions);
  };

  _proto.updateObservers = function updateObservers(notifyOptions) {
    var _this4 = this;

    notifyManager.batch(function () {
      var hasIndexChange = false;
      var prevObservers = _this4.observers;
      var prevOberversMap = _this4.observersMap;
      var newResult = [];
      var newObservers = [];
      var newObserversMap = {};

      _this4.queries.forEach(function (options, i) {
        var defaultedOptions = _this4.client.defaultQueryObserverOptions(options);

        var queryHash = defaultedOptions.queryHash;

        var observer = _this4.getObserver(defaultedOptions);

        if (prevOberversMap[queryHash]) {
          observer.setOptions(defaultedOptions, notifyOptions);
        }

        if (observer !== prevObservers[i]) {
          hasIndexChange = true;
        }

        newObservers.push(observer);
        newResult.push(observer.getCurrentResult());
        newObserversMap[queryHash] = observer;
      });

      if (prevObservers.length === newObservers.length && !hasIndexChange) {
        return;
      }

      _this4.observers = newObservers;
      _this4.observersMap = newObserversMap;
      _this4.result = newResult;

      if (!_this4.hasListeners()) {
        return;
      }

      difference(prevObservers, newObservers).forEach(function (observer) {
        observer.destroy();
      });
      difference(newObservers, prevObservers).forEach(function (observer) {
        observer.subscribe(function (result) {
          _this4.onUpdate(observer, result);
        });
      });

      _this4.notify();
    });
  };

  _proto.onUpdate = function onUpdate(observer, result) {
    var index = this.observers.indexOf(observer);

    if (index !== -1) {
      this.result = replaceAt(this.result, index, result);
      this.notify();
    }
  };

  _proto.notify = function notify() {
    var _this5 = this;

    notifyManager.batch(function () {
      _this5.listeners.forEach(function (listener) {
        listener(_this5.result);
      });
    });
  };

  return QueriesObserver;
}(Subscribable);