add error handler and message deleter

d2m/actions/delete-message.js

@@ -0,0 +1,29 @@
+// @ts-check
+
+const passthrough = require("../../passthrough")
+const { sync, db } = passthrough
+/** @type {import("../converters/edit-to-changes")} */
+const editToChanges = sync.require("../converters/edit-to-changes")
+/** @type {import("../../matrix/api")} */
+const api = sync.require("../../matrix/api")
+
+/**
+ * @param {import("discord-api-types/v10").GatewayMessageDeleteDispatchData} data
+ */
+async function deleteMessage(data) {
+	/** @type {string?} */
+	const roomID = db.prepare("SELECT channel_id FROM channel_room WHERE channel_id = ?").pluck().get(data.channel_id)
+	if (!roomID) return
+
+	/** @type {string[]} */
+	const eventsToRedact = db.prepare("SELECT event_id FROM event_message WHERE message_id = ?").pluck().all(data.id)
+
+	for (const eventID of eventsToRedact) {
+		// Unfortuately, we can't specify a sender to do the redaction as, unless we find out that info via the audit logs
+		await api.redactEvent(roomID, eventID)
+		db.prepare("DELETE from event_message WHERE event_id = ?").run(eventID)
+		// TODO: Consider whether this code could be reused between edited messages and deleted messages.
+	}
+}
+
+module.exports.deleteMessage = deleteMessage