softkave-js-utils/build/other/RefreshableResource.js

JavaScript & Typescript utility functions, types, and classes

export class RefreshableResource {
    constructor(props) {
        this.timeout = props.timeout;
        this.resource = props.resource;
        this.previous = null;
        this.refreshFn = props.refreshFn;
        this.onRefresh = props.onRefresh;
        this.onError = props.onError;
        this.intervalId = null;
    }
    start() {
        this.stop();
        this.intervalId = setInterval(() => {
            this.__refresh();
        }, this.timeout);
        return this;
    }
    stop() {
        if (this.intervalId) {
            clearInterval(this.intervalId);
            this.intervalId = null;
        }
        return this;
    }
    getValue() {
        return this.resource;
    }
    setValue(value) {
        this.previous = this.resource;
        this.resource = value;
        return this;
    }
    getPreviousValue() {
        return this.previous;
    }
    refresh() {
        this.stop();
        return this.__refresh().finally(() => this.start());
    }
    getRefreshTimeout() {
        return this.timeout;
    }
    setRefreshTimeout(timeout) {
        this.timeout = timeout;
        return this;
    }
    getRefreshFn() {
        return this.refreshFn;
    }
    setRefreshFn(refreshFn) {
        this.refreshFn = refreshFn;
        return this;
    }
    getOnRefresh() {
        return this.onRefresh;
    }
    setOnRefresh(onRefresh) {
        this.onRefresh = onRefresh;
        return this;
    }
    getOnError() {
        return this.onError;
    }
    setOnError(onError) {
        this.onError = onError;
        return this;
    }
    dispose() {
        this.stop();
    }
    __refresh() {
        return this.refreshFn(this.resource)
            .then(newResource => {
            this.previous = this.resource;
            this.resource = newResource;
            this.onRefresh(this.resource, this.previous);
        })
            .catch(error => {
            this.onError(error, this.resource);
        });
    }
}
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