Per-guild presence sync settings

On by default for existing and small guilds.
Off for new large guilds.
Can be toggled either way.

src/web/pug/guild.pug

@@ -102,6 +102,17 @@ block body
       #autocreate-loading
 
   if space_id
+    h3.mt32.fs-category Presence
+    .s-card
+      form.d-flex.ai-center.g8
+        label.s-label.fl-grow1(for="presence")
+          | Show online statuses on Matrix
+          p.s-description This might cause lag on really big Discord servers.
+        - let value = !!select("guild_space", "presence", {guild_id}).pluck().get()
+        input(type="hidden" name="guild_id" value=guild_id)
+        input.s-toggle-switch.order-last#autocreate(name="presence" type="checkbox" hx-post="/api/presence" hx-indicator="#presence-loading" hx-disabled-elt="this" checked=value autocomplete="off")
+        #presence-loading
+
     h3.mt32.fs-category Privacy level
     .s-card
       form(hx-post="/api/privacy-level" hx-trigger="change" hx-indicator="#privacy-level-loading" hx-disabled-elt="input")

src/web/routes/guild-settings.js

@@ -8,6 +8,8 @@ const {as, db, sync, select} = require("../../passthrough")
 
 /** @type {import("../auth")} */
 const auth = sync.require("../auth")
+/** @type {import("../../d2m/actions/set-presence")} */
+const setPresence = sync.require("../../d2m/actions/set-presence")
 
 /**
  * @param {H3Event} event
@@ -25,6 +27,10 @@ const schema = {
 		guild_id: z.string(),
 		autocreate: z.string().optional()
 	}),
+	presence: z.object({
+		guild_id: z.string(),
+		presence: z.string().optional()
+	}),
 	privacyLevel: z.object({
 		guild_id: z.string(),
 		level: z.enum(levels)
@@ -51,6 +57,17 @@ as.router.post("/api/autocreate", defineEventHandler(async event => {
 	return null // 204
 }))
 
+as.router.post("/api/presence", defineEventHandler(async event => {
+	const parsedBody = await readValidatedBody(event, schema.presence.parse)
+	const managed = await auth.getManagedGuilds(event)
+	if (!managed.has(parsedBody.guild_id)) throw createError({status: 403, message: "Forbidden", data: "Can't change settings for a guild you don't have Manage Server permissions in"})
+
+	db.prepare("UPDATE guild_space SET presence = ? WHERE guild_id = ?").run(+!!parsedBody.presence, parsedBody.guild_id)
+	setPresence.checkPresenceEnabledGuilds()
+
+	return null // 204
+}))
+
 as.router.post("/api/privacy-level", defineEventHandler(async event => {
 	const parsedBody = await readValidatedBody(event, schema.privacyLevel.parse)
 	const managed = await auth.getManagedGuilds(event)