140 lines
4.2 KiB
TypeScript
140 lines
4.2 KiB
TypeScript
/*
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Copyright 2015, 2016 OpenMarket Ltd
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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import React, { createRef } from "react";
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import { logger } from "matrix-js-sdk/src/logger";
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import { _t } from "../../../languageHandler";
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const DIV_ID = "mx_recaptcha";
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interface ICaptchaFormProps {
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sitePublicKey: string;
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onCaptchaResponse: (response: string) => void;
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}
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interface ICaptchaFormState {
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errorText?: string;
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}
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/**
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* A pure UI component which displays a captcha form.
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*/
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export default class CaptchaForm extends React.Component<ICaptchaFormProps, ICaptchaFormState> {
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public static defaultProps = {
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onCaptchaResponse: () => {},
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};
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private captchaWidgetId?: string;
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private recaptchaContainer = createRef<HTMLDivElement>();
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public constructor(props: ICaptchaFormProps) {
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super(props);
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this.state = {
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errorText: undefined,
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};
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}
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public componentDidMount(): void {
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// Just putting a script tag into the returned jsx doesn't work, annoyingly,
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// so we do this instead.
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if (this.isRecaptchaReady()) {
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// already loaded
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this.onCaptchaLoaded();
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} else {
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logger.log("Loading recaptcha script...");
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window.mxOnRecaptchaLoaded = () => {
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this.onCaptchaLoaded();
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};
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const scriptTag = document.createElement("script");
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scriptTag.setAttribute(
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"src",
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`https://www.recaptcha.net/recaptcha/api.js?onload=mxOnRecaptchaLoaded&render=explicit`,
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);
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this.recaptchaContainer.current?.appendChild(scriptTag);
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}
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}
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public componentWillUnmount(): void {
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this.resetRecaptcha();
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}
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// Borrowed directly from: https://github.com/codeep/react-recaptcha-google/commit/e118fa5670fa268426969323b2e7fe77698376ba
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private isRecaptchaReady(): boolean {
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return (
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typeof window !== "undefined" &&
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typeof global.grecaptcha !== "undefined" &&
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typeof global.grecaptcha.render === "function"
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);
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}
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private renderRecaptcha(divId: string): void {
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if (!this.isRecaptchaReady()) {
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logger.error("grecaptcha not loaded!");
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throw new Error("Recaptcha did not load successfully");
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}
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const publicKey = this.props.sitePublicKey;
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if (!publicKey) {
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logger.error("No public key for recaptcha!");
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throw new Error("This server has not supplied enough information for Recaptcha authentication");
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}
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logger.info("Rendering to %s", divId);
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this.captchaWidgetId = global.grecaptcha?.render(divId, {
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sitekey: publicKey,
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callback: this.props.onCaptchaResponse,
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});
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}
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private resetRecaptcha(): void {
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if (this.captchaWidgetId) {
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global?.grecaptcha?.reset(this.captchaWidgetId);
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}
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}
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private onCaptchaLoaded(): void {
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logger.log("Loaded recaptcha script.");
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try {
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this.renderRecaptcha(DIV_ID);
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// clear error if re-rendered
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this.setState({
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errorText: undefined,
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});
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} catch (e) {
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this.setState({
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errorText: e.toString(),
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});
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}
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}
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public render(): React.ReactNode {
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let error: JSX.Element | undefined;
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if (this.state.errorText) {
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error = <div className="error">{this.state.errorText}</div>;
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}
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return (
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<div ref={this.recaptchaContainer}>
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<p>{_t("This homeserver would like to make sure you are not a robot.")}</p>
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<div id={DIV_ID} />
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{error}
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</div>
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);
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}
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}
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