From 6e55e6d1b358707821f08b251940c2385757b204 Mon Sep 17 00:00:00 2001
From: Cadence Ember <cadence@disroot.org>
Date: Mon, 3 Jul 2023 01:06:05 +1200
Subject: [PATCH] preparing for m2d

---
 m2d/actions/send-message.js             |  2 +-
 m2d/converters/event-to-message.js      | 30 +++++++++++++++++++++++
 m2d/converters/event-to-message.test.js | 32 +++++++++++++++++++++++++
 m2d/event-dispatcher.js                 |  4 ++++
 test/test.js                            |  1 +
 types.d.ts                              | 12 ++++++++++
 6 files changed, 80 insertions(+), 1 deletion(-)
 create mode 100644 m2d/converters/event-to-message.js
 create mode 100644 m2d/converters/event-to-message.test.js

diff --git a/m2d/actions/send-message.js b/m2d/actions/send-message.js
index 9c611071..3505b601 100644
--- a/m2d/actions/send-message.js
+++ b/m2d/actions/send-message.js
@@ -10,7 +10,7 @@ const registerWebhook = sync.require("./register-webhook")
 
 /**
  * @param {string} channelID
- * @param {DiscordTypes.RESTPostAPIWebhookWithTokenJSONBody & {name: string, file: Buffer}[]} data
+ * @param {DiscordTypes.RESTPostAPIWebhookWithTokenJSONBody & {files?: {name: string, file: Buffer}[]}[]} data
  */
 // param {DiscordTypes.RESTPostAPIWebhookWithTokenQuery & {wait: true, disableEveryone?: boolean}} options
 async function sendMessage(channelID, data) {
diff --git a/m2d/converters/event-to-message.js b/m2d/converters/event-to-message.js
new file mode 100644
index 00000000..f48b5daa
--- /dev/null
+++ b/m2d/converters/event-to-message.js
@@ -0,0 +1,30 @@
+// @ts-check
+
+const assert = require("assert").strict
+const DiscordTypes = require("discord-api-types/v10")
+const markdown = require("discord-markdown")
+
+const passthrough = require("../../passthrough")
+const { sync, db, discord } = passthrough
+/** @type {import("../../matrix/file")} */
+const file = sync.require("../../matrix/file")
+
+/**
+ * @param {import("../../types").Event.Outer<import("../../types").Event.M_Room_Message>} event
+ */
+function eventToMessage(event) {
+	/** @type {(DiscordTypes.RESTPostAPIWebhookWithTokenJSONBody & {files?: {name: string, file: Buffer}[]})[]} */
+	const messages = []
+
+	if (event.content.msgtype === "m.text") {
+		messages.push({
+			content: event.content.body,
+			username: event.sender.replace(/^@/, ""),
+			avatar_url: undefined, // TODO: provide the URL to the avatar from the homeserver's content repo
+		})
+	}
+
+	return messages
+}
+
+module.exports.eventToMessage = eventToMessage
diff --git a/m2d/converters/event-to-message.test.js b/m2d/converters/event-to-message.test.js
new file mode 100644
index 00000000..a41beef7
--- /dev/null
+++ b/m2d/converters/event-to-message.test.js
@@ -0,0 +1,32 @@
+// @ts-check
+
+const {test} = require("supertape")
+const assert = require("assert")
+const {eventToMessage} = require("./event-to-message")
+const data = require("../../test/data")
+
+test("event2message: janky test", t => {
+	t.deepEqual(
+		eventToMessage({
+			age: 405299,
+			content: {
+				body: "test",
+				msgtype: "m.text"
+			},
+			event_id: "$g07oYSZFWBkxohNEfywldwgcWj1hbhDzQ1sBAKvqOOU",
+			origin_server_ts: 1688301929913,
+			room_id: "!kLRqKKUQXcibIMtOpl:cadence.moe",
+			sender: "@cadence:cadence.moe",
+			type: "m.room.message",
+			unsigned: {
+				age: 405299
+			},
+			user_id: "@cadence:cadence.moe"
+		}),
+		[{
+			username: "cadence:cadence.moe",
+			content: "test",
+			avatar_url: undefined
+		}]
+	)
+})
diff --git a/m2d/event-dispatcher.js b/m2d/event-dispatcher.js
index 136aae0c..789d9edc 100644
--- a/m2d/event-dispatcher.js
+++ b/m2d/event-dispatcher.js
@@ -1,3 +1,5 @@
+// @ts-check
+
 const assert = require("assert").strict
 const {sync, as} = require("../passthrough")
 
@@ -5,4 +7,6 @@ const {sync, as} = require("../passthrough")
 
 sync.addTemporaryListener(as, "type:m.room.message", event => {
 	console.log(event)
+	// TODO: filter out events that were bridged discord messages (i.e. sent by OOYE)
+	// TODO: call sendMessage
 })
diff --git a/test/test.js b/test/test.js
index 5f06ae41..f2f0912d 100644
--- a/test/test.js
+++ b/test/test.js
@@ -18,3 +18,4 @@ require("../d2m/converters/message-to-event.test")
 require("../d2m/actions/create-room.test")
 require("../d2m/converters/user-to-mxid.test")
 require("../d2m/actions/register-user.test")
+require("../m2d/converters/event-to-message.test")
diff --git a/types.d.ts b/types.d.ts
index aaa8db16..2181793d 100644
--- a/types.d.ts
+++ b/types.d.ts
@@ -15,6 +15,18 @@ export type WebhookCreds = {
 }
 
 namespace Event {
+	export type Outer<T> = {
+		type: string
+		room_id: string
+		sender: string
+		content: T
+		origin_server_ts: number
+		unsigned: any
+		event_id: string
+		user_id: string
+		age: number
+	}
+
 	export type BaseStateEvent = {
 		type: string
 		room_id: string