websocket cursor data broadcast

package.json

@@ -32,7 +32,9 @@
     "@nestjs/core": "^11.0.1",
     "@nestjs/passport": "^11.0.5",
     "@nestjs/platform-express": "^11.0.1",
+    "@nestjs/platform-socket.io": "^11.1.9",
     "@nestjs/swagger": "^11.2.3",
+    "@nestjs/websockets": "^11.1.9",
     "@prisma/adapter-pg": "^7.0.0",
     "@prisma/client": "^7.0.0",
     "class-transformer": "^0.5.1",
@@ -43,7 +45,8 @@
     "passport-jwt": "^4.0.1",
     "pg": "^8.16.3",
     "reflect-metadata": "^0.2.2",
-    "rxjs": "^7.8.1"
+    "rxjs": "^7.8.1",
+    "socket.io": "^4.8.1"
   },
   "devDependencies": {
     "@eslint/eslintrc": "^3.2.0",

pnpm-lock.yaml

@@ -16,16 +16,22 @@ importers:
         version: 4.0.2(@nestjs/common@11.1.9(class-transformer@0.5.1)(class-validator@0.14.2)(reflect-metadata@0.2.2)(rxjs@7.8.2))(rxjs@7.8.2)
       '@nestjs/core':
         specifier: ^11.0.1
-        version: 11.1.9(@nestjs/common@11.1.9(class-transformer@0.5.1)(class-validator@0.14.2)(reflect-metadata@0.2.2)(rxjs@7.8.2))(@nestjs/platform-express@11.1.9)(reflect-metadata@0.2.2)(rxjs@7.8.2)
+        version: 11.1.9(@nestjs/common@11.1.9(class-transformer@0.5.1)(class-validator@0.14.2)(reflect-metadata@0.2.2)(rxjs@7.8.2))(@nestjs/platform-express@11.1.9)(@nestjs/websockets@11.1.9)(reflect-metadata@0.2.2)(rxjs@7.8.2)
       '@nestjs/passport':
         specifier: ^11.0.5
         version: 11.0.5(@nestjs/common@11.1.9(class-transformer@0.5.1)(class-validator@0.14.2)(reflect-metadata@0.2.2)(rxjs@7.8.2))(passport@0.7.0)
       '@nestjs/platform-express':
         specifier: ^11.0.1
         version: 11.1.9(@nestjs/common@11.1.9(class-transformer@0.5.1)(class-validator@0.14.2)(reflect-metadata@0.2.2)(rxjs@7.8.2))(@nestjs/core@11.1.9)
+      '@nestjs/platform-socket.io':
+        specifier: ^11.1.9
+        version: 11.1.9(@nestjs/common@11.1.9(class-transformer@0.5.1)(class-validator@0.14.2)(reflect-metadata@0.2.2)(rxjs@7.8.2))(@nestjs/websockets@11.1.9)(rxjs@7.8.2)
       '@nestjs/swagger':
         specifier: ^11.2.3
         version: 11.2.3(@nestjs/common@11.1.9(class-transformer@0.5.1)(class-validator@0.14.2)(reflect-metadata@0.2.2)(rxjs@7.8.2))(@nestjs/core@11.1.9)(class-transformer@0.5.1)(class-validator@0.14.2)(reflect-metadata@0.2.2)
+      '@nestjs/websockets':
+        specifier: ^11.1.9
+        version: 11.1.9(@nestjs/common@11.1.9(class-transformer@0.5.1)(class-validator@0.14.2)(reflect-metadata@0.2.2)(rxjs@7.8.2))(@nestjs/core@11.1.9)(@nestjs/platform-socket.io@11.1.9)(reflect-metadata@0.2.2)(rxjs@7.8.2)
       '@prisma/adapter-pg':
         specifier: ^7.0.0
         version: 7.0.0
@@ -59,6 +65,9 @@ importers:
       rxjs:
         specifier: ^7.8.1
         version: 7.8.2
+      socket.io:
+        specifier: ^4.8.1
+        version: 4.8.1
     devDependencies:
       '@eslint/eslintrc':
         specifier: ^3.2.0
@@ -799,6 +808,13 @@ packages:
       '@nestjs/common': ^11.0.0
       '@nestjs/core': ^11.0.0
 
+  '@nestjs/platform-socket.io@11.1.9':
+    resolution: {integrity: sha512-OaAW+voXo5BXbFKd9Ot3SL05tEucRMhZRdw5wdWZf/RpIl9hB6G6OHr8DDxNbUGvuQWzNnZHCDHx3EQJzjcIyA==}
+    peerDependencies:
+      '@nestjs/common': ^11.0.0
+      '@nestjs/websockets': ^11.0.0
+      rxjs: ^7.1.0
+
   '@nestjs/schematics@11.0.9':
     resolution: {integrity: sha512-0NfPbPlEaGwIT8/TCThxLzrlz3yzDNkfRNpbL7FiplKq3w4qXpJg0JYwqgMEJnLQZm3L/L/5XjoyfJHUO3qX9g==}
     peerDependencies:
@@ -834,6 +850,18 @@ packages:
       '@nestjs/platform-express':
         optional: true
 
+  '@nestjs/websockets@11.1.9':
+    resolution: {integrity: sha512-kkkdeTVcc3X7ZzvVqUVpOAJoh49kTRUjWNUXo5jmG+27OvZoHfs/vuSiqxidrrbIgydSqN15HUsf1wZwQUrxCQ==}
+    peerDependencies:
+      '@nestjs/common': ^11.0.0
+      '@nestjs/core': ^11.0.0
+      '@nestjs/platform-socket.io': ^11.0.0
+      reflect-metadata: ^0.1.12 || ^0.2.0
+      rxjs: ^7.1.0
+    peerDependenciesMeta:
+      '@nestjs/platform-socket.io':
+        optional: true
+
   '@noble/hashes@1.8.0':
     resolution: {integrity: sha512-jCs9ldd7NwzpgXDIf6P3+NrHh9/sD6CQdxHyjQI+h/6rDNo88ypBxxz45UDuZHz9r3tNz7N/VInSVoVdtXEI4A==}
     engines: {node: ^14.21.3 || >=16}
@@ -936,6 +964,9 @@ packages:
   '@sinonjs/fake-timers@13.0.5':
     resolution: {integrity: sha512-36/hTbH2uaWuGVERyC6da9YwGWnzUZXuPro/F2LfsdOsLnCojz/iSH8MxUt/FD2S5XBSVPhmArFUXcpCQ2Hkiw==}
 
+  '@socket.io/component-emitter@3.1.2':
+    resolution: {integrity: sha512-9BCxFwvbGg/RsZK9tjXd8s4UcwR0MWeFQ1XEKIQVVvAGJyINdrqKMcTRyLoK8Rse1GjzLV9cwjWV1olXRWEXVA==}
+
   '@standard-schema/spec@1.0.0':
     resolution: {integrity: sha512-m2bOd0f2RT9k8QJx1JN85cZYyH1RqFBdlwtkSlf4tBDYLCiiZnv1fIIwacK6cqwXavOydf0NPToMQgpKq+dVlA==}
 
@@ -982,6 +1013,9 @@ packages:
   '@types/cookiejar@2.1.5':
     resolution: {integrity: sha512-he+DHOWReW0nghN24E1WUqM0efK4kI9oTqDm6XmK8ZPe2djZ90BSNdGnIyCLzCPw7/pogPlGbzI2wHGGmi4O/Q==}
 
+  '@types/cors@2.8.19':
+    resolution: {integrity: sha512-mFNylyeyqN93lfe/9CSxOGREz8cpzAhH+E93xJ4xWQf62V8sQ/24reV2nyzUWM6H6Xji+GGHpkbLe7pVoUEskg==}
+
   '@types/eslint-scope@3.7.7':
     resolution: {integrity: sha512-MzMFlSLBqNF2gcHWO0G1vP/YQyfvrxZ0bF+u7mzUdZ1/xK4A4sru+nraZz5i3iEIk1l1uyicaDVTB4QbbEkAYg==}
 
@@ -1292,6 +1326,10 @@ packages:
   '@xtuc/long@4.2.2':
     resolution: {integrity: sha512-NuHqBY1PB/D8xU6s/thBgOAiAP7HOYDQ32+BFZILJ8ivkUkAHQnWfn6WhL79Owj1qmUnoN/YPhktdIoucipkAQ==}
 
+  accepts@1.3.8:
+    resolution: {integrity: sha512-PYAthTa2m2VKxuvSD3DPC/Gy+U+sOA1LAuT8mkmRuvw+NACSaeXEQ+NHcVF7rONl6qcaxV3Uuemwawk+7+SJLw==}
+    engines: {node: '>= 0.6'}
+
   accepts@2.0.0:
     resolution: {integrity: sha512-5cvg6CtKwfgdmVqY1WIiXKc3Q1bkRqGLi+2W/6ao+6Y7gu/RCwRuAhGEzh5B4KlszSuTLgZYuqFqo5bImjNKng==}
     engines: {node: '>= 0.6'}
@@ -1440,6 +1478,10 @@ packages:
   base64-js@1.5.1:
     resolution: {integrity: sha512-AKpaYlHn8t4SVbOHCy+b5+KKgvR4vrsD8vbvrbiQJps7fKDTkjkDry6ji0rUJjC0kzbNePLwzxq8iypo41qeWA==}
 
+  base64id@2.0.0:
+    resolution: {integrity: sha512-lGe34o6EHj9y3Kts9R4ZYs/Gr+6N7MCaMlIFA3F1R2O5/m7K06AxfSeO5530PEERE6/WyEg3lsuyw4GHlPZHog==}
+    engines: {node: ^4.5.0 || >= 5.9}
+
   baseline-browser-mapping@2.8.30:
     resolution: {integrity: sha512-aTUKW4ptQhS64+v2d6IkPzymEzzhw+G0bA1g3uBRV3+ntkH+svttKseW5IOR4Ed6NUVKqnY7qT3dKvzQ7io4AA==}
     hasBin: true
@@ -1677,6 +1719,15 @@ packages:
   csstype@3.2.3:
     resolution: {integrity: sha512-z1HGKcYy2xA8AGQfwrn0PAy+PB7X/GSj3UVJW9qKyn43xWa+gl5nXmU4qqLMRzWVLFC8KusUX8T/0kCiOYpAIQ==}
 
+  debug@4.3.7:
+    resolution: {integrity: sha512-Er2nc/H7RrMXZBFCEim6TCmMk02Z8vLC2Rbi1KEBggpo0fS6l0S1nnapwmIi3yW/+GOJap1Krg4w0Hg80oCqgQ==}
+    engines: {node: '>=6.0'}
+    peerDependencies:
+      supports-color: '*'
+    peerDependenciesMeta:
+      supports-color:
+        optional: true
+
   debug@4.4.3:
     resolution: {integrity: sha512-RGwwWnwQvkVfavKVt22FGLw+xYSdzARwm0ru6DhTVA3umU5hZc28V3kO4stgYryrTlLpuvgI9GiijltAjNbcqA==}
     engines: {node: '>=6.0'}
@@ -1790,6 +1841,14 @@ packages:
     resolution: {integrity: sha512-Q0n9HRi4m6JuGIV1eFlmvJB7ZEVxu93IrMyiMsGC0lrMJMWzRgx6WGquyfQgZVb31vhGgXnfmPNNXmxnOkRBrg==}
     engines: {node: '>= 0.8'}
 
+  engine.io-parser@5.2.3:
+    resolution: {integrity: sha512-HqD3yTBfnBxIrbnM1DoD6Pcq8NECnh8d4As1Qgh0z5Gg3jRRIqijury0CL3ghu/edArpUYiYqQiDUQBIs4np3Q==}
+    engines: {node: '>=10.0.0'}
+
+  engine.io@6.6.4:
+    resolution: {integrity: sha512-ZCkIjSYNDyGn0R6ewHDtXgns/Zre/NT6Agvq1/WobF7JXgFff4SeDroKiCO3fNJreU9YG429Sc81o4w5ok/W5g==}
+    engines: {node: '>=10.2.0'}
+
   enhanced-resolve@5.18.3:
     resolution: {integrity: sha512-d4lC8xfavMeBjzGr2vECC3fsGXziXZQyJxD868h2M/mBI3PwAuODxAkLkq5HYuvrPYcUtiLzsTo8U3PgX3Ocww==}
     engines: {node: '>=10.13.0'}
@@ -2702,6 +2761,10 @@ packages:
   natural-compare@1.4.0:
     resolution: {integrity: sha512-OWND8ei3VtNC9h7V60qff3SVobHr996CTwgxubgyQYEpg290h9J0buyECNNJexkFm5sOajh5G116RYA1c8ZMSw==}
 
+  negotiator@0.6.3:
+    resolution: {integrity: sha512-+EUsqGPLsM+j/zdChZjsnX51g4XrHFOIXwfnCVPGlQk/k5giakcKsuxCObBRu6DSm9opw/O6slWbJdghQM4bBg==}
+    engines: {node: '>= 0.6'}
+
   negotiator@1.0.0:
     resolution: {integrity: sha512-8Ofs/AUQh8MaEcrlq5xOX0CQ9ypTF5dl78mjlMNfOK08fzpgTHQRQPBxcPlEtIw0yRpws+Zo/3r+5WRby7u3Gg==}
     engines: {node: '>= 0.6'}
@@ -2741,6 +2804,10 @@ packages:
     resolution: {integrity: sha512-rJgTQnkUnH1sFw8yT6VSU3zD3sWmu6sZhIseY8VX+GRu3P6F7Fu+JNDoXfklElbLJSnc3FUQHVe4cU5hj+BcUg==}
     engines: {node: '>=0.10.0'}
 
+  object-hash@3.0.0:
+    resolution: {integrity: sha512-RSn9F68PjH9HqtltsSnqYC1XXoWe9Bju5+213R98cNGttag9q9yAOTzdbsqvIa7aNm5WffBZFpWYr2aWrklWAw==}
+    engines: {node: '>= 6'}
+
   object-inspect@1.13.4:
     resolution: {integrity: sha512-W67iLl4J2EXEGTbfeHCffrjDfitvLANg0UlX3wFUUSTx92KXRFegMHUVgSqE+wvhAbi4WqjGg9czysTV2Epbew==}
     engines: {node: '>= 0.4'}
@@ -3157,6 +3224,17 @@ packages:
     resolution: {integrity: sha512-g9Q1haeby36OSStwb4ntCGGGaKsaVSjQ68fBxoQcutl5fS1vuY18H3wSt3jFyFtrkx+Kz0V1G85A4MyAdDMi2Q==}
     engines: {node: '>=8'}
 
+  socket.io-adapter@2.5.5:
+    resolution: {integrity: sha512-eLDQas5dzPgOWCk9GuuJC2lBqItuhKI4uxGgo9aIV7MYbk2h9Q6uULEh8WBzThoI7l+qU9Ast9fVUmkqPP9wYg==}
+
+  socket.io-parser@4.2.4:
+    resolution: {integrity: sha512-/GbIKmo8ioc+NIWIhwdecY0ge+qVBSMdgxGygevmdHj24bsfgtCmcUUcQ5ZzcylGFHsN3k4HB4Cgkl96KVnuew==}
+    engines: {node: '>=10.0.0'}
+
+  socket.io@4.8.1:
+    resolution: {integrity: sha512-oZ7iUCxph8WYRHHcjBEc9unw3adt5CmSNlppj/5Q4k2RIrhl8Z5yY2Xr4j9zj0+wzVZ0bxmYoGSzKJnRl6A4yg==}
+    engines: {node: '>=10.2.0'}
+
   source-map-support@0.5.13:
     resolution: {integrity: sha512-SHSKFHadjVA5oR4PPqhtAVdcBWwRYVd6g6cAXnIbRiIwc2EhPrTuKUBdSLvlEKyIP3GCf89fltvcZiP9MMFA1w==}
 
@@ -3548,6 +3626,18 @@ packages:
     resolution: {integrity: sha512-+QU2zd6OTD8XWIJCbffaiQeH9U73qIqafo1x6V1snCWYGJf6cVE0cDR4D8xRzcEnfI21IFrUPzPGtcPf8AC+Rw==}
     engines: {node: ^14.17.0 || ^16.13.0 || >=18.0.0}
 
+  ws@8.17.1:
+    resolution: {integrity: sha512-6XQFvXTkbfUOZOKKILFG1PDK2NDQs4azKQl26T0YS5CxqWLgXajbPZ+h4gZekJyRqFU8pvnbAbbs/3TgRPy+GQ==}
+    engines: {node: '>=10.0.0'}
+    peerDependencies:
+      bufferutil: ^4.0.1
+      utf-8-validate: '>=5.0.2'
+    peerDependenciesMeta:
+      bufferutil:
+        optional: true
+      utf-8-validate:
+        optional: true
+
   xtend@4.0.2:
     resolution: {integrity: sha512-LKYU1iAXJXUgAXn9URjiu+MWhyUXHsvfp7mcuYm9dSUKK0/CjtrUwFAxD82/mCWbtLsGjFIad0wIsod4zrTAEQ==}
     engines: {node: '>=0.4'}
@@ -4379,7 +4469,7 @@ snapshots:
       lodash: 4.17.21
       rxjs: 7.8.2
 
-  '@nestjs/core@11.1.9(@nestjs/common@11.1.9(class-transformer@0.5.1)(class-validator@0.14.2)(reflect-metadata@0.2.2)(rxjs@7.8.2))(@nestjs/platform-express@11.1.9)(reflect-metadata@0.2.2)(rxjs@7.8.2)':
+  '@nestjs/core@11.1.9(@nestjs/common@11.1.9(class-transformer@0.5.1)(class-validator@0.14.2)(reflect-metadata@0.2.2)(rxjs@7.8.2))(@nestjs/platform-express@11.1.9)(@nestjs/websockets@11.1.9)(reflect-metadata@0.2.2)(rxjs@7.8.2)':
     dependencies:
       '@nestjs/common': 11.1.9(class-transformer@0.5.1)(class-validator@0.14.2)(reflect-metadata@0.2.2)(rxjs@7.8.2)
       '@nuxt/opencollective': 0.4.1
@@ -4392,6 +4482,7 @@ snapshots:
       uid: 2.0.2
     optionalDependencies:
       '@nestjs/platform-express': 11.1.9(@nestjs/common@11.1.9(class-transformer@0.5.1)(class-validator@0.14.2)(reflect-metadata@0.2.2)(rxjs@7.8.2))(@nestjs/core@11.1.9)
+      '@nestjs/websockets': 11.1.9(@nestjs/common@11.1.9(class-transformer@0.5.1)(class-validator@0.14.2)(reflect-metadata@0.2.2)(rxjs@7.8.2))(@nestjs/core@11.1.9)(@nestjs/platform-socket.io@11.1.9)(reflect-metadata@0.2.2)(rxjs@7.8.2)
 
   '@nestjs/mapped-types@2.1.0(@nestjs/common@11.1.9(class-transformer@0.5.1)(class-validator@0.14.2)(reflect-metadata@0.2.2)(rxjs@7.8.2))(class-transformer@0.5.1)(class-validator@0.14.2)(reflect-metadata@0.2.2)':
     dependencies:
@@ -4409,7 +4500,7 @@ snapshots:
   '@nestjs/platform-express@11.1.9(@nestjs/common@11.1.9(class-transformer@0.5.1)(class-validator@0.14.2)(reflect-metadata@0.2.2)(rxjs@7.8.2))(@nestjs/core@11.1.9)':
     dependencies:
       '@nestjs/common': 11.1.9(class-transformer@0.5.1)(class-validator@0.14.2)(reflect-metadata@0.2.2)(rxjs@7.8.2)
-      '@nestjs/core': 11.1.9(@nestjs/common@11.1.9(class-transformer@0.5.1)(class-validator@0.14.2)(reflect-metadata@0.2.2)(rxjs@7.8.2))(@nestjs/platform-express@11.1.9)(reflect-metadata@0.2.2)(rxjs@7.8.2)
+      '@nestjs/core': 11.1.9(@nestjs/common@11.1.9(class-transformer@0.5.1)(class-validator@0.14.2)(reflect-metadata@0.2.2)(rxjs@7.8.2))(@nestjs/platform-express@11.1.9)(@nestjs/websockets@11.1.9)(reflect-metadata@0.2.2)(rxjs@7.8.2)
       cors: 2.8.5
       express: 5.1.0
       multer: 2.0.2
@@ -4418,6 +4509,18 @@ snapshots:
     transitivePeerDependencies:
       - supports-color
 
+  '@nestjs/platform-socket.io@11.1.9(@nestjs/common@11.1.9(class-transformer@0.5.1)(class-validator@0.14.2)(reflect-metadata@0.2.2)(rxjs@7.8.2))(@nestjs/websockets@11.1.9)(rxjs@7.8.2)':
+    dependencies:
+      '@nestjs/common': 11.1.9(class-transformer@0.5.1)(class-validator@0.14.2)(reflect-metadata@0.2.2)(rxjs@7.8.2)
+      '@nestjs/websockets': 11.1.9(@nestjs/common@11.1.9(class-transformer@0.5.1)(class-validator@0.14.2)(reflect-metadata@0.2.2)(rxjs@7.8.2))(@nestjs/core@11.1.9)(@nestjs/platform-socket.io@11.1.9)(reflect-metadata@0.2.2)(rxjs@7.8.2)
+      rxjs: 7.8.2
+      socket.io: 4.8.1
+      tslib: 2.8.1
+    transitivePeerDependencies:
+      - bufferutil
+      - supports-color
+      - utf-8-validate
+
   '@nestjs/schematics@11.0.9(chokidar@4.0.3)(typescript@5.9.3)':
     dependencies:
       '@angular-devkit/core': 19.2.17(chokidar@4.0.3)
@@ -4433,7 +4536,7 @@ snapshots:
     dependencies:
       '@microsoft/tsdoc': 0.16.0
       '@nestjs/common': 11.1.9(class-transformer@0.5.1)(class-validator@0.14.2)(reflect-metadata@0.2.2)(rxjs@7.8.2)
-      '@nestjs/core': 11.1.9(@nestjs/common@11.1.9(class-transformer@0.5.1)(class-validator@0.14.2)(reflect-metadata@0.2.2)(rxjs@7.8.2))(@nestjs/platform-express@11.1.9)(reflect-metadata@0.2.2)(rxjs@7.8.2)
+      '@nestjs/core': 11.1.9(@nestjs/common@11.1.9(class-transformer@0.5.1)(class-validator@0.14.2)(reflect-metadata@0.2.2)(rxjs@7.8.2))(@nestjs/platform-express@11.1.9)(@nestjs/websockets@11.1.9)(reflect-metadata@0.2.2)(rxjs@7.8.2)
       '@nestjs/mapped-types': 2.1.0(@nestjs/common@11.1.9(class-transformer@0.5.1)(class-validator@0.14.2)(reflect-metadata@0.2.2)(rxjs@7.8.2))(class-transformer@0.5.1)(class-validator@0.14.2)(reflect-metadata@0.2.2)
       js-yaml: 4.1.1
       lodash: 4.17.21
@@ -4447,11 +4550,23 @@ snapshots:
   '@nestjs/testing@11.1.9(@nestjs/common@11.1.9(class-transformer@0.5.1)(class-validator@0.14.2)(reflect-metadata@0.2.2)(rxjs@7.8.2))(@nestjs/core@11.1.9)(@nestjs/platform-express@11.1.9)':
     dependencies:
       '@nestjs/common': 11.1.9(class-transformer@0.5.1)(class-validator@0.14.2)(reflect-metadata@0.2.2)(rxjs@7.8.2)
-      '@nestjs/core': 11.1.9(@nestjs/common@11.1.9(class-transformer@0.5.1)(class-validator@0.14.2)(reflect-metadata@0.2.2)(rxjs@7.8.2))(@nestjs/platform-express@11.1.9)(reflect-metadata@0.2.2)(rxjs@7.8.2)
+      '@nestjs/core': 11.1.9(@nestjs/common@11.1.9(class-transformer@0.5.1)(class-validator@0.14.2)(reflect-metadata@0.2.2)(rxjs@7.8.2))(@nestjs/platform-express@11.1.9)(@nestjs/websockets@11.1.9)(reflect-metadata@0.2.2)(rxjs@7.8.2)
       tslib: 2.8.1
     optionalDependencies:
       '@nestjs/platform-express': 11.1.9(@nestjs/common@11.1.9(class-transformer@0.5.1)(class-validator@0.14.2)(reflect-metadata@0.2.2)(rxjs@7.8.2))(@nestjs/core@11.1.9)
 
+  '@nestjs/websockets@11.1.9(@nestjs/common@11.1.9(class-transformer@0.5.1)(class-validator@0.14.2)(reflect-metadata@0.2.2)(rxjs@7.8.2))(@nestjs/core@11.1.9)(@nestjs/platform-socket.io@11.1.9)(reflect-metadata@0.2.2)(rxjs@7.8.2)':
+    dependencies:
+      '@nestjs/common': 11.1.9(class-transformer@0.5.1)(class-validator@0.14.2)(reflect-metadata@0.2.2)(rxjs@7.8.2)
+      '@nestjs/core': 11.1.9(@nestjs/common@11.1.9(class-transformer@0.5.1)(class-validator@0.14.2)(reflect-metadata@0.2.2)(rxjs@7.8.2))(@nestjs/platform-express@11.1.9)(@nestjs/websockets@11.1.9)(reflect-metadata@0.2.2)(rxjs@7.8.2)
+      iterare: 1.2.1
+      object-hash: 3.0.0
+      reflect-metadata: 0.2.2
+      rxjs: 7.8.2
+      tslib: 2.8.1
+    optionalDependencies:
+      '@nestjs/platform-socket.io': 11.1.9(@nestjs/common@11.1.9(class-transformer@0.5.1)(class-validator@0.14.2)(reflect-metadata@0.2.2)(rxjs@7.8.2))(@nestjs/websockets@11.1.9)(rxjs@7.8.2)
+
   '@noble/hashes@1.8.0': {}
 
   '@nodelib/fs.scandir@2.1.5':
@@ -4578,6 +4693,8 @@ snapshots:
     dependencies:
       '@sinonjs/commons': 3.0.1
 
+  '@socket.io/component-emitter@3.1.2': {}
+
   '@standard-schema/spec@1.0.0': {}
 
   '@tokenizer/inflate@0.3.1':
@@ -4635,6 +4752,10 @@ snapshots:
 
   '@types/cookiejar@2.1.5': {}
 
+  '@types/cors@2.8.19':
+    dependencies:
+      '@types/node': 22.19.1
+
   '@types/eslint-scope@3.7.7':
     dependencies:
       '@types/eslint': 9.6.1
@@ -5007,6 +5128,11 @@ snapshots:
 
   '@xtuc/long@4.2.2': {}
 
+  accepts@1.3.8:
+    dependencies:
+      mime-types: 2.1.35
+      negotiator: 0.6.3
+
   accepts@2.0.0:
     dependencies:
       mime-types: 3.0.2
@@ -5156,6 +5282,8 @@ snapshots:
 
   base64-js@1.5.1: {}
 
+  base64id@2.0.0: {}
+
   baseline-browser-mapping@2.8.30: {}
 
   bl@4.1.0:
@@ -5394,6 +5522,10 @@ snapshots:
 
   csstype@3.2.3: {}
 
+  debug@4.3.7:
+    dependencies:
+      ms: 2.1.3
+
   debug@4.4.3:
     dependencies:
       ms: 2.1.3
@@ -5470,6 +5602,24 @@ snapshots:
 
   encodeurl@2.0.0: {}
 
+  engine.io-parser@5.2.3: {}
+
+  engine.io@6.6.4:
+    dependencies:
+      '@types/cors': 2.8.19
+      '@types/node': 22.19.1
+      accepts: 1.3.8
+      base64id: 2.0.0
+      cookie: 0.7.2
+      cors: 2.8.5
+      debug: 4.3.7
+      engine.io-parser: 5.2.3
+      ws: 8.17.1
+    transitivePeerDependencies:
+      - bufferutil
+      - supports-color
+      - utf-8-validate
+
   enhanced-resolve@5.18.3:
     dependencies:
       graceful-fs: 4.2.11
@@ -6599,6 +6749,8 @@ snapshots:
 
   natural-compare@1.4.0: {}
 
+  negotiator@0.6.3: {}
+
   negotiator@1.0.0: {}
 
   neo-async@2.6.2: {}
@@ -6631,6 +6783,8 @@ snapshots:
 
   object-assign@4.1.1: {}
 
+  object-hash@3.0.0: {}
+
   object-inspect@1.13.4: {}
 
   ohash@2.0.11: {}
@@ -7046,6 +7200,36 @@ snapshots:
 
   slash@3.0.0: {}
 
+  socket.io-adapter@2.5.5:
+    dependencies:
+      debug: 4.3.7
+      ws: 8.17.1
+    transitivePeerDependencies:
+      - bufferutil
+      - supports-color
+      - utf-8-validate
+
+  socket.io-parser@4.2.4:
+    dependencies:
+      '@socket.io/component-emitter': 3.1.2
+      debug: 4.3.7
+    transitivePeerDependencies:
+      - supports-color
+
+  socket.io@4.8.1:
+    dependencies:
+      accepts: 1.3.8
+      base64id: 2.0.0
+      cors: 2.8.5
+      debug: 4.3.7
+      engine.io: 6.6.4
+      socket.io-adapter: 2.5.5
+      socket.io-parser: 4.2.4
+    transitivePeerDependencies:
+      - bufferutil
+      - supports-color
+      - utf-8-validate
+
   source-map-support@0.5.13:
     dependencies:
       buffer-from: 1.1.2
@@ -7452,6 +7636,8 @@ snapshots:
       imurmurhash: 0.1.4
       signal-exit: 4.1.0
 
+  ws@8.17.1: {}
+
   xtend@4.0.2: {}
 
   y18n@5.0.8: {}

src/app.module.ts

@@ -5,6 +5,7 @@ import { AppService } from './app.service';
 import { UsersModule } from './users/users.module';
 import { AuthModule } from './auth/auth.module';
 import { DatabaseModule } from './database/database.module';
+import { WsModule } from './ws/ws.module';
 
 /**
  * Validates required environment variables.
@@ -51,6 +52,7 @@ function validateEnvironment(config: Record<string, any>): Record<string, any> {
     DatabaseModule, // Global database module for Prisma
     UsersModule,
     AuthModule,
+    WsModule,
   ],
   controllers: [AppController],
   providers: [AppService],

src/ws/state/state.gateway.spec.ts

@@ -0,0 +1,97 @@
+import { Test, TestingModule } from '@nestjs/testing';
+import { StateGateway } from './state.gateway';
+import { Socket } from 'socket.io';
+
+describe('StateGateway', () => {
+  let gateway: StateGateway;
+  let mockLoggerLog: jest.SpyInstance;
+  let mockLoggerDebug: jest.SpyInstance;
+  let mockServer: any;
+
+  beforeEach(async () => {
+    mockServer = {
+      sockets: {
+        sockets: {
+          size: 5,
+        },
+      },
+    };
+
+    const module: TestingModule = await Test.createTestingModule({
+      providers: [StateGateway],
+    }).compile();
+
+    gateway = module.get<StateGateway>(StateGateway);
+    gateway.io = mockServer;
+
+    // Spy on logger methods
+    mockLoggerLog = jest
+      // gateway is private in `state.gateway.ts` so we have to
+      // eslint-disable-next-line @typescript-eslint/no-unsafe-member-access
+      .spyOn((gateway as any).logger, 'log')
+      .mockImplementation();
+    mockLoggerDebug = jest
+      // eslint-disable-next-line @typescript-eslint/no-unsafe-member-access
+      .spyOn((gateway as any).logger, 'debug')
+      .mockImplementation();
+  });
+
+  afterEach(() => {
+    jest.restoreAllMocks();
+  });
+
+  it('should be defined', () => {
+    expect(gateway).toBeDefined();
+  });
+
+  describe('afterInit', () => {
+    it('should log initialization message', () => {
+      gateway.afterInit();
+
+      expect(mockLoggerLog).toHaveBeenCalledWith('Initialized');
+    });
+  });
+
+  describe('handleConnection', () => {
+    it('should log client connection and number of connected clients', () => {
+      const mockClient = { id: 'client1' } as Socket;
+
+      gateway.handleConnection(mockClient);
+
+      expect(mockLoggerLog).toHaveBeenCalledWith(
+        `Client id: ${mockClient.id} connected`,
+      );
+      expect(mockLoggerDebug).toHaveBeenCalledWith(
+        'Number of connected clients: 5',
+      );
+    });
+  });
+
+  describe('handleDisconnect', () => {
+    it('should log client disconnection', () => {
+      const mockClient = { id: 'client1' } as Socket;
+
+      gateway.handleDisconnect(mockClient);
+
+      expect(mockLoggerLog).toHaveBeenCalledWith(
+        `Cliend id:${mockClient.id} disconnected`,
+      );
+    });
+  });
+
+  describe('handleCursorReportPosition', () => {
+    it('should log message received from client', () => {
+      const mockClient = { id: 'client1' } as Socket;
+      const data = { x: 100, y: 200 };
+
+      gateway.handleCursorReportPosition(mockClient, data);
+
+      expect(mockLoggerLog).toHaveBeenCalledWith(
+        `Message received from client id: ${mockClient.id}`,
+      );
+      expect(mockLoggerDebug).toHaveBeenCalledWith(
+        `Payload: ${JSON.stringify(data, null, 0)}`,
+      );
+    });
+  });
+});

src/ws/state/state.gateway.ts

@@ -0,0 +1,41 @@
+import { Logger } from '@nestjs/common';
+import {
+  OnGatewayConnection,
+  OnGatewayDisconnect,
+  OnGatewayInit,
+  SubscribeMessage,
+  WebSocketGateway,
+  WebSocketServer,
+} from '@nestjs/websockets';
+
+import { Server, Socket } from 'socket.io';
+
+@WebSocketGateway()
+export class StateGateway
+  implements OnGatewayInit, OnGatewayConnection, OnGatewayDisconnect
+{
+  private readonly logger = new Logger(StateGateway.name);
+
+  @WebSocketServer() io: Server;
+
+  afterInit() {
+    this.logger.log('Initialized');
+  }
+
+  handleConnection(client: Socket) {
+    const { sockets } = this.io.sockets;
+
+    this.logger.log(`Client id: ${client.id} connected`);
+    this.logger.debug(`Number of connected clients: ${sockets.size}`);
+  }
+
+  handleDisconnect(client: Socket) {
+    this.logger.log(`Cliend id:${client.id} disconnected`);
+  }
+
+  @SubscribeMessage('cursor-report-position')
+  handleCursorReportPosition(client: Socket, data: any) {
+    this.logger.log(`Message received from client id: ${client.id}`);
+    this.logger.debug(`Payload: ${JSON.stringify(data, null, 0)}`);
+  }
+}

src/ws/ws.module.ts

@@ -0,0 +1,7 @@
+import { Module } from '@nestjs/common';
+import { StateGateway } from './state/state.gateway';
+
+@Module({
+  providers: [StateGateway],
+})
+export class WsModule {}