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1 files changed, 68 insertions, 0 deletions

diff --git a/app.js b/app.js
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+import 'dotenv/config';
+import express from 'express';
+import cron from 'node-cron';
+import {
+  InteractionType,
+  InteractionResponseType,
+  verifyKeyMiddleware,
+} from 'discord-interactions';
+
+// Create an express app
+const app = express();
+// Get port, or default to 3000
+const PORT = process.env.PORT || 3000;
+
+/**
+ * Interactions endpoint URL where Discord will send HTTP requests
+ * Parse request body and verifies incoming requests using discord-interactions package
+ */
+app.post('/', verifyKeyMiddleware(process.env.PUBLIC_KEY), async function (req, res) {
+  // Interaction type and data
+  const { type, data } = req.body;
+
+  /**
+   * Handle verification requests
+   */
+  if (type === InteractionType.PING) {
+    return res.send({ type: InteractionResponseType.PONG });
+  }
+
+  /**
+   * Handle slash command requests
+   * See https://discord.com/developers/docs/interactions/application-commands#slash-commands
+   */
+  if (type === InteractionType.APPLICATION_COMMAND) {
+      const { name, options } = data;
+
+      if (name === 'schedule_message') {
+          const message = options[0].value;
+          const crontab = options[1].value;
+          const valid = cron.validate(crontab);
+
+          const content = valid ? 'registered message "' + message + '" with cron "' + crontab + '"' : 'invalid cron';
+
+          if (valid) {
+              cron.schedule(crontab, () => {
+                  console.log(message);
+              });
+          }
+
+          return res.send({
+              type: InteractionResponseType.CHANNEL_MESSAGE_WITH_SOURCE,
+              data: {
+                  content: content,
+              },
+          });
+      }
+
+    console.error(`unknown command: ${name}`);
+    return res.status(400).json({ error: 'unknown command' });
+  }
+
+  console.error('unknown interaction type', type);
+  return res.status(400).json({ error: 'unknown interaction type' });
+});
+
+app.listen(PORT, () => {
+  console.log('Listening on port', PORT);
+});