@appsemble/node-utils/server/routes/appRouter/robotsHandler.js

NodeJS utilities used by Appsemble internally.

import { assertKoaCondition, logger } from '@appsemble/node-utils';
export function createRobotsHandler({ getApp }) {
    return async (ctx) => {
        const app = await getApp({ context: ctx, query: { attributes: ['id', 'visibility'] } });
        assertKoaCondition(app != null, ctx, 404, 'App not found');
        switch (app.visibility) {
            case 'public':
                ctx.body = 'User-agent: *\nAllow: *\n';
                break;
            case 'unlisted':
            case 'private':
                ctx.body = 'User-agent: *\nDisallow: /\n';
                break;
            default:
                logger.error('Unknown visibility', { visibility: app.visibility });
                ctx.status = 500;
                break;
        }
    };
}
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