handmade-revolt/src/components/common/AgeGate.tsx

import { observer } from "mobx-react-lite";
import { useHistory } from "react-router-dom";
import { Channel } from "revolt.js";
import styled from "styled-components/macro";

import { Text } from "preact-i18n";
import { useEffect, useState } from "preact/hooks";

import { Button, Checkbox, Preloader } from "@revoltchat/ui";

import { useApplicationState } from "../../mobx/State";
import { SECTION_NSFW } from "../../mobx/stores/Layout";

const Base = styled.div`
    display: flex;
    flex-grow: 1;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    user-select: none;
    padding: 12px;

    img {
        height: 150px;
    }

    .subtext {
        color: var(--secondary-foreground);
        margin-bottom: 12px;
        font-size: 14px;
    }

    .actions {
        margin-top: 20px;
        display: flex;
        gap: 12px;
    }
`;

type Props = {
    gated: boolean;
    children: Children;
} & {
    type: "channel";
    channel: Channel;
};

let geoBlock:
    | undefined
    | {
          countryCode: string;
          isAgeRestrictedGeo: true;
      };

export default observer((props: Props) => {
    const history = useHistory();
    const layout = useApplicationState().layout;
    const [geoLoaded, setGeoLoaded] = useState(typeof geoBlock !== "undefined");
    const [ageGate, setAgeGate] = useState(false);

    useEffect(() => {
        if (!geoLoaded) {
            fetch("https://geo.revolt.chat")
                .then((res) => res.json())
                .then((data) => {
                    geoBlock = data;
                    setGeoLoaded(true);
                });
        }
    }, []);

    if (!geoBlock) return <Preloader type="spinner" />;

    if ((ageGate && !geoBlock.isAgeRestrictedGeo) || !props.gated) {
        return <>{props.children}</>;
    }

    if (
        !(
            props.channel.channel_type === "Group" ||
            props.channel.channel_type === "TextChannel"
        )
    )
        return <>{props.children}</>;

    return (
        <Base>
            <img
                loading="eager"
                src={"https://static.revolt.chat/emoji/mutant/26a0.svg"}
                draggable={false}
            />
            <h2>{props.channel.name}</h2>
            <span className="subtext">
                <Text id={`app.main.channel.nsfw.${props.type}.marked`} />{" "}
                <a href="#">
                    <Text id={`app.main.channel.nsfw.learn_more`} />
                </a>
            </span>

            {geoBlock.isAgeRestrictedGeo ? (
                <div style={{ maxWidth: "420px", textAlign: "center" }}>
                    {geoBlock.countryCode === "GB"
                        ? "This channel is not available in your region while we review options on legal compliance."
                        : "This content is not available in your region."}
                </div>
            ) : (
                <>
                    <Checkbox
                        title={<Text id="app.main.channel.nsfw.confirm" />}
                        value={layout.getSectionState(SECTION_NSFW, false)}
                        onChange={() =>
                            layout.toggleSectionState(SECTION_NSFW, false)
                        }
                    />
                    <div className="actions">
                        <Button
                            palette="secondary"
                            onClick={() => history.goBack()}>
                            <Text id="app.special.modals.actions.back" />
                        </Button>
                        <Button
                            palette="secondary"
                            onClick={() =>
                                layout.getSectionState(SECTION_NSFW) &&
                                setAgeGate(true)
                            }>
                            <Text
                                id={`app.main.channel.nsfw.${props.type}.confirm`}
                            />
                        </Button>
                    </div>
                </>
            )}
        </Base>
    );
});