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import { AutoRouter } from 'itty-router';
import {
InteractionResponseType,
InteractionType,
verifyKey,
} from 'discord-interactions';
import { HOT_COMMAND, ROLEPLAY_COMMAND } from './commands.js';
import { getCutePost, getRoleplayPost } from './reddit.js';
class JSONResponse extends Response {
constructor(body, init) {
const jsonBody = JSON.stringify(body);
init = init || {
headers: {
'content-type': 'application/json;charset=UTF-8',
},
};
super(jsonBody, init);
}
}
const router = AutoRouter();
function createPostEmbed(post) {
const mediaUrl =
post.media?.reddit_video?.fallback_url ||
post.secure_media?.reddit_video?.fallback_url ||
post.url;
let description = post.selftext || '';
if (description.length > 1000)
description = description.substring(0, 997).trim() + ' ...';
const embed = {
title: post.title,
description: description,
url: `https://reddit.com${post.permalink}`,
color: 0xff4500,
author: {
name: `u/${post.author}`,
url: `https://reddit.com/u/${post.author}`,
},
fields: [
{
name: 'Score',
value: `${post.score} ⬆️`,
inline: true,
},
{
name: 'Comments',
value: `${post.num_comments} 💬`,
inline: true,
},
],
timestamp: new Date(post.created_utc * 1000).toISOString(),
footer: {
text: 'r/okbuddyumamusume',
},
};
if (mediaUrl)
if (post.media?.reddit_video || post.secure_media?.reddit_video)
embed.video = { url: mediaUrl };
else embed.image = { url: mediaUrl };
return embed;
}
router.get('/', (_request, environment) => {
return new Response(`👋 ${environment.DISCORD_APPLICATION_ID}`);
});
router.post('/', async (request, environment) => {
const { isValid, interaction } = await server.verifyDiscordRequest(
request,
environment,
);
if (!isValid || !interaction)
return new Response('Bad request signature.', { status: 401 });
if (interaction.type === InteractionType.PING)
return new JSONResponse({
type: InteractionResponseType.PONG,
});
if (interaction.type === InteractionType.APPLICATION_COMMAND) {
switch (interaction.data.name.toLowerCase()) {
case HOT_COMMAND.name.toLowerCase(): {
const post = await getCutePost();
const embed = createPostEmbed(post);
return new JSONResponse({
type: InteractionResponseType.CHANNEL_MESSAGE_WITH_SOURCE,
data: {
embeds: [embed],
},
});
}
case ROLEPLAY_COMMAND.name.toLowerCase(): {
const post = await getRoleplayPost();
const embed = createPostEmbed(post);
return new JSONResponse({
type: InteractionResponseType.CHANNEL_MESSAGE_WITH_SOURCE,
data: {
embeds: [embed],
},
});
}
default:
return new JSONResponse({ error: 'Unknown Type' }, { status: 400 });
}
}
console.error('Unknown Type');
return new JSONResponse({ error: 'Unknown Type' }, { status: 400 });
});
router.all('*', () => new Response('Not Found.', { status: 404 }));
async function verifyDiscordRequest(request, environment) {
const signature = request.headers.get('x-signature-ed25519');
const timestamp = request.headers.get('x-signature-timestamp');
const body = await request.text();
const isValidRequest =
signature &&
timestamp &&
(await verifyKey(
body,
signature,
timestamp,
environment.DISCORD_PUBLIC_KEY,
));
if (!isValidRequest) return { isValid: false };
return { interaction: JSON.parse(body), isValid: true };
}
const server = {
verifyDiscordRequest,
fetch: router.fetch,
};
export default server;
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