Initial multiplayer feature

2025-03-01 10:36:34 +00:00 · 2024-03-27 17:30:44 +00:00
parent 068b93befa
commit 014f206e9c
11 changed files with 404 additions and 1 deletions
--- a/packages/node_modules/@node-red/runtime/lib/multiplayer/index.js
+++ b/packages/node_modules/@node-red/runtime/lib/multiplayer/index.js
@@ -0,0 +1,119 @@
+let runtime
+
+/**
+ * Active sessions, mapped by multiplayer session ids
+ */
+const sessions = new Map()
+
+/**
+ * Active connections, mapping comms session to multiplayer session
+ */
+const connections = new Map()
+
+
+function getSessionsList() {
+    return Array.from(sessions.values()).filter(session => session.active)
+}
+
+module.exports = {
+    init: function(_runtime) {
+        runtime = _runtime
+        runtime.events.on('comms:connection-removed', (opts) => {
+            const existingSessionId = connections.get(opts.session)
+            if (existingSessionId) {
+                connections.delete(opts.session)
+                const session = sessions.get(existingSessionId)
+                session.active = false
+                session.idleTimeout = setTimeout(() => {
+                    sessions.delete(existingSessionId)
+                }, 30000)
+                runtime.events.emit('comms', {
+                    topic: "multiplayer/connection-removed",
+                    data: { session: existingSessionId }
+                })
+            }
+        })
+        runtime.events.on('comms:message:multiplayer/connect', (opts) => {
+            let session
+            if (!sessions.has(opts.data.session)) {
+                // Brand new session
+                let user = opts.user
+                if (!user || user.anonymous) {
+                    user = user || { anonymous: true }
+                    user.username = `Anon ${Math.floor(Math.random()*100)}`
+                }
+                session = {
+                    session: opts.data.session,
+                    user,
+                    active: true
+                }
+                sessions.set(opts.data.session, session)
+                connections.set(opts.session, opts.data.session)
+                runtime.log.trace(`multiplayer new session:${opts.data.session} user:${user.username}`)
+            } else {
+                // Reconnected connection - keep existing state
+                connections.set(opts.session, opts.data.session)
+                // const existingConnection  = connections.get(opts.data.session)
+                session = sessions.get(opts.data.session)
+                session.active = true
+                runtime.log.trace(`multiplayer reconnected session:${opts.data.session} user:${session.user.username}`)
+                clearTimeout(session.idleTimeout)
+            }
+            // Tell existing sessions about the new connection
+            runtime.events.emit('comms', {
+                topic: "multiplayer/connection-added",
+                excludeSession: opts.session,
+                data: session
+            })
+
+            // Send init info to new connection
+            const initPacket = {
+                topic: "multiplayer/init",
+                data: getSessionsList(),
+                session: opts.session
+            }
+            // console.log('<<', initPacket)
+            runtime.events.emit('comms', initPacket)
+        })
+        runtime.events.on('comms:message:multiplayer/disconnect', (opts) => {
+            const existingSessionId = connections.get(opts.session)
+            connections.delete(opts.session)
+            sessions.delete(existingSessionId)
+
+            runtime.events.emit('comms', {
+                topic: "multiplayer/connection-removed",
+                data: { session: existingSessionId, disconnected: true }
+            })
+        })
+        runtime.events.on('comms:message:multiplayer/location', (opts) => {
+            // console.log('>>>', opts.user, opts.data)
+
+            const sessionId = connections.get(opts.session)
+            const session = sessions.get(sessionId)
+
+            if (opts.user) {
+                if (session.user.anonymous !== opts.user.anonymous) {
+                    session.user = opts.user
+                    runtime.events.emit('comms', {
+                        topic: 'multiplayer/connection-added',
+                        excludeSession: opts.session,
+                        data: session
+                    })
+                }
+            }
+
+            session.location = opts.data
+
+            const payload = {
+                session: sessionId,
+                workspace: opts.data.workspace,
+                node: opts.data.node
+            }
+            runtime.events.emit('comms', {
+                topic: 'multiplayer/location',
+                data: payload,
+                excludeSession: opts.session
+            })
+        })
+    }
+}