src/d2m/converters/message-to-event.js

@@ -769,7 +769,21 @@ async function messageToEvent(message, guild, options = {}, di) {
 	// Then scheduled events
 	if (message.content && di?.snow) {
 		for (const match of [...message.content.matchAll(/discord\.gg\/([A-Za-z0-9]+)\?event=([0-9]{18,})/g)]) { // snowflake has minimum 18 because the events feature is at least that old
-			const invite = await di.snow.invite.getInvite(match[1], {guild_scheduled_event_id: match[2]})
+			let invite
+			try {
+				invite = await di.snow.invite.getInvite(match[1], {guild_scheduled_event_id: match[2]})
+			} catch (e) {
+				// Skip expired events and invites
+				if (e.code === 10006 || e.httpStatus === 404) {
+					console.warn(`[Backfill] Skipped expired scheduled event: ${match[0]}`)
+					const fallbackBody = `[Expired Scheduled Event: ${match[0]}]`
+					const fallbackHtml = `<blockquote>Expired Scheduled Event: <a href="https://${match[0]}">${match[0]}</a></blockquote>`
+					await addTextEvent(fallbackBody, fallbackHtml, "m.notice")
+					continue
+				}
+				throw e
+			}
+
 			const event = invite.guild_scheduled_event
 			if (!event) continue // the event ID provided was not valid
 

src/d2m/converters/message-to-event.test.js

@@ -1538,6 +1538,38 @@ test("message2event: vc invite event renders embed with room link", async t => {
 	])
 })
 
+test("message2event: expired event invite renders fallback notice", async t => {
+	const events = await messageToEvent({content: "https://discord.gg/placeholder?event=1381190945646710824"}, {}, {}, {
+		snow: {
+			invite: {
+				getInvite: async () => {
+					const error = new Error("Unknown Invite")
+					error.code = 10006
+					throw error
+				}
+			}
+		}
+	})
+	t.deepEqual(events, [
+		{
+			$type: "m.room.message",
+			body: "https://discord.gg/placeholder?event=1381190945646710824",
+			format: "org.matrix.custom.html",
+			formatted_body: "<a href=\"https://discord.gg/placeholder?event=1381190945646710824\">https://discord.gg/placeholder?event=1381190945646710824</a>",
+			"m.mentions": {},
+			msgtype: "m.text",
+		},
+		{
+			$type: "m.room.message",
+			msgtype: "m.notice",
+			body: "[Expired Scheduled Event: discord.gg/placeholder?event=1381190945646710824]",
+			format: "org.matrix.custom.html",
+			formatted_body: "<blockquote>Expired Scheduled Event: <a href=\"https://discord.gg/placeholder?event=1381190945646710824\">discord.gg/placeholder?event=1381190945646710824</a></blockquote>",
+			"m.mentions": {}
+		}
+	])
+})
+
 test("message2event: channel links are converted even inside lists (parser post-processer descends into list items)", async t => {
 	let called = 0
 	const events = await messageToEvent({