Add experimental update stream

package-lock.json

@@ -2738,8 +2738,8 @@
       "integrity": "sha512-q0M/9eZHzmr0AulXyPwNfZjtwZ/RBZlbN3K3CErVrk50T2ASYI7Bye0EvekFY3IP1Nt2DHu0re+V2ZHIpMkuWg=="
     },
     "pinski": {
-      "version": "github:cloudrac3r/pinski#64e588416e27da406711d853778dfcd729138397",
+      "version": "github:cloudrac3r/pinski#0ac730907da8f3a644bc9d50063b6367b15b7944",
-      "from": "github:cloudrac3r/pinski#64e588416e27da406711d853778dfcd729138397",
+      "from": "github:cloudrac3r/pinski#0ac730907da8f3a644bc9d50063b6367b15b7944",
       "requires": {
         "mime": "^2.4.4",
         "pug": "^2.0.3",

package.json

@@ -19,7 +19,7 @@
     "mixin-deep": "^2.0.1",
     "node-dir": "^0.1.17",
     "node-fetch": "^2.6.0",
-    "pinski": "github:cloudrac3r/pinski#64e588416e27da406711d853778dfcd729138397",
+    "pinski": "github:cloudrac3r/pinski#0ac730907da8f3a644bc9d50063b6367b15b7944",
     "pug": "^2.0.4",
     "semver": "^7.2.1",
     "sharp": "^0.25.2",

src/site/api/update_stream.js

@@ -0,0 +1,30 @@
+const {Readable} = require("stream")
+
+const streams = new Set()
+
+setInterval((new (function() {
+	const payload = `:keepalive ${Date.now()}\n\n`
+	for (const stream of streams.values()) {
+		stream.push(payload)
+	}
+})).constructor, 50000)
+
+module.exports = [
+	{
+		route: "/api/update_stream", methods: ["GET"], code: async () => {
+			const stream = new Readable({
+				read: function() {},
+				destroy: function() {
+					streams.delete(stream)
+				}
+			})
+			streams.add(stream)
+
+			return {
+				statusCode: 200,
+				contentType: "text/event-stream",
+				stream
+			}
+		}
+	}
+]