109 lines
3.9 KiB
JavaScript
109 lines
3.9 KiB
JavaScript
import React, { Component } from 'react';
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import ExecutionEnvironment from 'exenv';
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import shallowEqual from 'shallowequal';
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function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
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function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }
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function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }
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function withSideEffect(reducePropsToState, handleStateChangeOnClient, mapStateOnServer) {
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if (typeof reducePropsToState !== 'function') {
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throw new Error('Expected reducePropsToState to be a function.');
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}
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if (typeof handleStateChangeOnClient !== 'function') {
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throw new Error('Expected handleStateChangeOnClient to be a function.');
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}
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if (typeof mapStateOnServer !== 'undefined' && typeof mapStateOnServer !== 'function') {
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throw new Error('Expected mapStateOnServer to either be undefined or a function.');
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}
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function getDisplayName(WrappedComponent) {
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return WrappedComponent.displayName || WrappedComponent.name || 'Component';
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}
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return function wrap(WrappedComponent) {
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if (typeof WrappedComponent !== 'function') {
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throw new Error('Expected WrappedComponent to be a React component.');
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}
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var mountedInstances = [];
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var state = void 0;
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function emitChange() {
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state = reducePropsToState(mountedInstances.map(function (instance) {
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return instance.props;
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}));
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if (SideEffect.canUseDOM) {
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handleStateChangeOnClient(state);
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} else if (mapStateOnServer) {
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state = mapStateOnServer(state);
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}
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}
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var SideEffect = function (_Component) {
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_inherits(SideEffect, _Component);
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function SideEffect() {
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_classCallCheck(this, SideEffect);
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return _possibleConstructorReturn(this, _Component.apply(this, arguments));
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}
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// Try to use displayName of wrapped component
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SideEffect.peek = function peek() {
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return state;
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};
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// Expose canUseDOM so tests can monkeypatch it
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SideEffect.rewind = function rewind() {
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if (SideEffect.canUseDOM) {
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throw new Error('You may only call rewind() on the server. Call peek() to read the current state.');
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}
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var recordedState = state;
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state = undefined;
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mountedInstances = [];
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return recordedState;
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};
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SideEffect.prototype.shouldComponentUpdate = function shouldComponentUpdate(nextProps) {
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return !shallowEqual(nextProps, this.props);
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};
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SideEffect.prototype.componentWillMount = function componentWillMount() {
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mountedInstances.push(this);
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emitChange();
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};
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SideEffect.prototype.componentDidUpdate = function componentDidUpdate() {
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emitChange();
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};
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SideEffect.prototype.componentWillUnmount = function componentWillUnmount() {
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var index = mountedInstances.indexOf(this);
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mountedInstances.splice(index, 1);
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emitChange();
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};
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SideEffect.prototype.render = function render() {
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return React.createElement(WrappedComponent, this.props);
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};
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return SideEffect;
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}(Component);
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SideEffect.displayName = 'SideEffect(' + getDisplayName(WrappedComponent) + ')';
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SideEffect.canUseDOM = ExecutionEnvironment.canUseDOM;
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return SideEffect;
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};
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}
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export default withSideEffect;
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