@vlsergey/react-promise/lib/esm/PromiseComponent.js

React wrappers for Promises

var __extends = (this && this.__extends) || (function () {
    var extendStatics = function (d, b) {
        extendStatics = Object.setPrototypeOf ||
            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
            function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
        return extendStatics(d, b);
    };
    return function (d, b) {
        if (typeof b !== "function" && b !== null)
            throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
        extendStatics(d, b);
        function __() { this.constructor = d; }
        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
    };
})();
var __assign = (this && this.__assign) || function () {
    __assign = Object.assign || function(t) {
        for (var s, i = 1, n = arguments.length; i < n; i++) {
            s = arguments[i];
            for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
                t[p] = s[p];
        }
        return t;
    };
    return __assign.apply(this, arguments);
};
import { PureComponent } from 'react';
import * as memoize from './memoize';
var PromiseComponent = /** @class */ (function (_super) {
    __extends(PromiseComponent, _super);
    function PromiseComponent(props) {
        var _this = _super.call(this, props) || this;
        _this.mounted = false;
        _this.state = {
            error: undefined,
            completed: false,
            value: undefined,
        };
        _this.resetValue = function () {
            /* eslint react/no-direct-mutation-state: 0 */
            if (_this.mounted) {
                _this.setState({ error: null, completed: false, value: undefined });
            }
            else {
                _this.state = __assign(__assign({}, _this.state), { error: null, completed: false, value: undefined });
            }
        };
        _this.setValue = function (value) {
            if (_this.mounted) {
                _this.setState({ error: null, completed: true, value: value });
            }
            else {
                /* eslint-disable-next-line react/no-direct-mutation-state */
                _this.state = __assign(__assign({}, _this.state), { error: null, completed: true, value: value });
            }
        };
        _this.subscribe();
        return _this;
    }
    PromiseComponent.prototype.componentDidMount = function () {
        this.mounted = true;
        this.subscribe();
    };
    PromiseComponent.prototype.componentDidUpdate = function () {
        this.subscribe();
    };
    PromiseComponent.prototype.componentWillUnmount = function () {
        this.unsubscribe();
        this.mounted = false;
    };
    PromiseComponent.prototype.subscribe = function () {
        var _this = this;
        var _a = this.props, cleanOnChange = _a.cleanOnChange, promise = _a.promise;
        if (this.prevPromise !== promise) {
            if (cleanOnChange) {
                this.resetValue();
            }
            this.prevPromise = promise;
            if (promise !== undefined && promise !== null) {
                var cachedResult = memoize.find(promise);
                if (cachedResult)
                    this.setValue(cachedResult);
                promise.then(function (value) {
                    // cache promise result
                    memoize.set(promise, value);
                    if (_this.prevPromise === promise) {
                        _this.setValue(value);
                    }
                })
                    .catch(function (error) {
                    if (_this.prevPromise === promise) {
                        _this.setState({ error: error, completed: true, value: undefined });
                    }
                });
            }
        }
    };
    PromiseComponent.prototype.unsubscribe = function () {
        this.prevPromise = undefined;
    };
    PromiseComponent.prototype.render = function () {
        var _a = this.props, children = _a.children, fallback = _a.fallback;
        var _b = this.state, error = _b.error, completed = _b.completed, value = _b.value;
        if (!completed) {
            return fallback || null;
        }
        if (error !== null) {
            throw error;
        }
        return children(value);
    };
    return PromiseComponent;
}(PureComponent));
export default PromiseComponent;