Add latency to lobby listings

example/main.ts

@@ -80,7 +80,7 @@ n.on('ready', () => {
           lobbies.forEach(lobby => {
             const li = document.createElement('li')
             li.id = lobby.code
-            li.innerHTML = `<a href="javascript:void(0)" class="code">${lobby.code}</a> - <span class="map_name">${lobby.customData?.map as string ?? 'unknown map'}</span>  - <span class="players">${lobby.playerCount}</span> players`
+            li.innerHTML = `<a href="javascript:void(0)" class="code">${lobby.code}</a> - <span class="map_name">${lobby.customData?.map as string ?? 'unknown map'}</span>  - <span class="players">${lobby.playerCount}</span> players (${lobby.latency ?? '<unknown>'}ms)`
             el.appendChild(li)
             if (n.currentLobby === undefined) {
               li.querySelector('a.code')?.addEventListener('click', () => {

features/latency.feature

@@ -0,0 +1,174 @@
+Feature: Latency
+
+  Background:
+    Given the "signaling" backend is running
+    And the "testproxy" backend is running
+
+
+  Scenario: Lobby listings include the latency to the peer
+    Given the next peer's latency vector is set to:
+      """
+      10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10
+      """
+    And "green" is connected as "1u8fw4aph5ypt" and ready for game "b6f7fc97-8545-4ffd-b714-7cf339048556"
+    And "green" creates a lobby with these settings:
+      """json
+      {
+        "public": true
+      }
+      """
+    And "green" receives the network event "lobby" with the argument "h5yzwyizlwao"
+    And the next peer's latency vector is set to:
+      """
+      20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20
+      """
+    And "blue" is connected as "19yrzmetd2bn7" and ready for game "b6f7fc97-8545-4ffd-b714-7cf339048556"
+
+    When "blue" requests lobbies with:
+      """json
+      {}
+      """
+
+    Then "blue" should have received only these lobbies:
+      | code         | latency |
+      | h5yzwyizlwao | 24      |
+
+
+  Scenario: Lobby with multiple peers
+    Given the next peer's latency vector is set to:
+      """
+      99, 99, 99, 99, 10, 10, 10, 10, 10, 10, 10
+      """
+    And "blue" is connected as "1u8fw4aph5ypt" and ready for game "4307bd86-e1df-41b8-b9df-e22afcf084bd"
+    And the next peer's latency vector is set to:
+      """
+      10, 10, 10, 99, 99, 99, 99, 10, 10, 10, 10
+      """
+    And "yellow" is connected as "h5yzwyizlwao" and ready for game "4307bd86-e1df-41b8-b9df-e22afcf084bd"
+    And "blue,yellow" are joined in a public lobby
+    And the next peer's latency vector is set to:
+      """
+      10, 10, 10, 10, 10, 10, 99, 99, 99, 99, 10
+      """
+    And "green" is connected as "3t3cfgcqup9e" and ready for game "4307bd86-e1df-41b8-b9df-e22afcf084bd"
+
+    When "green" requests lobbies with:
+      """json
+      {}
+      """
+
+    Then "green" should have received only these lobbies:
+      | code          | latency |
+      | 19yrzmetd2bn7 | 89      |
+
+
+  Scenario: Sort lobbies by latency
+    Given the next peer's latency vector is set to:
+      """
+      30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30
+      """
+    And "blue" is connected as "1u8fw4aph5ypt" and ready for game "4307bd86-e1df-41b8-b9df-e22afcf084bd"
+    And "blue" creates a lobby with these settings:
+      """json
+      {
+        "public": true,
+        "customData": {
+          "map": "de_nuke"
+        }
+      }
+      """
+    And the next peer's latency vector is set to:
+      """
+      99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99
+      """
+    And "yellow" is connected as "19yrzmetd2bn7" and ready for game "4307bd86-e1df-41b8-b9df-e22afcf084bd"
+    And "yellow" creates a lobby with these settings:
+      """json
+      {
+        "public": true,
+        "customData": {
+          "map": "de_dust"
+        }
+      }
+      """
+    And the next peer's latency vector is set to:
+      """
+      10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10
+      """
+    And "green" is connected as "prb67ouj837u" and ready for game "4307bd86-e1df-41b8-b9df-e22afcf084bd"
+
+    When "green" requests lobbies with:
+      | filter | {}               |
+      | sort   | { "latency": 1 } |
+      | limit  | 1                |
+
+    Then "green" should have received only these lobbies:
+      | code         | latency | customData        |
+      | h5yzwyizlwao | 34      | {"map":"de_nuke"} |
+
+
+  Scenario: Latency to your own lobby
+    Given the next peer's latency vector is set to:
+      """
+      325, 523, 64, 21, 76, 23, 54, 235, 76, 23, 142
+      """
+    And "green" is connected as "1u8fw4aph5ypt" and ready for game "b6f7fc97-8545-4ffd-b714-7cf339048556"
+    And "green" creates a lobby with these settings:
+      """json
+      {
+        "public": true
+      }
+      """
+    And "green" receives the network event "lobby" with the argument "h5yzwyizlwao"
+
+    When "green" requests lobbies with:
+      """json
+      {}
+      """
+
+    Then "green" should have received only these lobbies:
+      | code         | latency |
+      | h5yzwyizlwao | 0       |
+
+
+  Scenario: Peers without latency vectors are not included in the estimate
+    Given "green" is connected as "1u8fw4aph5ypt" and ready for game "f666036d-d9e1-4d70-b0c3-4a68b24a9884"
+    And these lobbies exist:
+      | code          | game                                 | peers              | public |
+      | 1u8fw4aph5ypt | f666036d-d9e1-4d70-b0c3-4a68b24a9884 | {"peer1"}          | true   |
+      | 0qva9vyurwbbl | f666036d-d9e1-4d70-b0c3-4a68b24a9884 | {"peer2", "peer3"} | true   |
+    And these peers exist:
+      | peer  | game                                 | latency_vector                     |
+      | peer1 | f666036d-d9e1-4d70-b0c3-4a68b24a9884 | null                               |
+      | peer2 | f666036d-d9e1-4d70-b0c3-4a68b24a9884 | null                               |
+      | peer3 | f666036d-d9e1-4d70-b0c3-4a68b24a9884 | {10,10,10,10,10,10,10,10,10,10,10} |
+
+    When "green" requests lobbies with:
+      | filter | {}               |
+      | sort   | { "latency": 1 } |
+    Then "green" should have received only these lobbies:
+      | code          | latency   |
+      | 0qva9vyurwbbl | 10        |
+      | 1u8fw4aph5ypt | undefined |
+
+
+  Scenario: Client without latency vectors gives null latency estimates
+    Given the next peer's latency vector is set to:
+      """
+      null
+      """
+    Given "green" is connected as "1u8fw4aph5ypt" and ready for game "f666036d-d9e1-4d70-b0c3-4a68b24a9884"
+    And these lobbies exist:
+      | code          | game                                 | peers              | public |
+      | 0qva9vyurwbbl | f666036d-d9e1-4d70-b0c3-4a68b24a9884 | {"peer1", "peer2"} | true   |
+    And these peers exist:
+      | peer  | game                                 | latency_vector                     |
+      | peer1 | f666036d-d9e1-4d70-b0c3-4a68b24a9884 | {10,10,10,10,10,10,10,10,10,10,10} |
+
+    When "green" requests lobbies with:
+      """json
+      {}
+      """
+    Then "green" should have received only these lobbies:
+      | code          | latency   |
+      | 0qva9vyurwbbl | undefined |

features/support/steps/network.ts

@@ -19,7 +19,7 @@ Given('{string} is connected as {string} and ready for game {string}', async fun
   }
 })
 
-async function areJoinedInALobby (this: World, playerNamesRaw: string): Promise<void> {
+async function areJoinedInALobby (this: World, playerNamesRaw: string, publc: boolean): Promise<void> {
   const playerNames = playerNamesRaw.split(',').map(s => s.trim())
   if (playerNames.length < 2) {
     throw new Error('need at least 2 players to join a lobby')
@@ -29,7 +29,9 @@ async function areJoinedInALobby (this: World, playerNamesRaw: string): Promise<
     throw new Error(`player ${playerNames[0]} not found`)
   }
 
-  void first.network.create()
+  void first.network.create({
+    public: publc
+  })
   const lobbyEvent = await first.waitForEvent('lobby')
   const lobbyCode = lobbyEvent.eventPayload[0] as string
 
@@ -55,7 +57,13 @@ async function areJoinedInALobby (this: World, playerNamesRaw: string): Promise<
   }
 }
 
-Given('{string} are joined in a lobby', areJoinedInALobby)
+Given('{string} are joined in a lobby', async function (this: World, playerNamesRaw: string) {
+  await areJoinedInALobby.call(this, playerNamesRaw, false)
+})
+
+Given('{string} are joined in a public lobby', async function (this: World, playerNamesRaw: string) {
+  await areJoinedInALobby.call(this, playerNamesRaw, true)
+})
 
 Given('{string} are joined in a lobby for game {string}', async function (this: World, playerNamesRaw: string, gameID: string) {
   const playerNames = playerNamesRaw.split(',').map(s => s.trim())
@@ -72,7 +80,7 @@ Given('{string} are joined in a lobby for game {string}', async function (this:
     }
   }
 
-  await areJoinedInALobby.call(this, playerNamesRaw)
+  await areJoinedInALobby.call(this, playerNamesRaw, false)
 })
 
 Given('these lobbies exist:', async function (this: World, lobbies: DataTable) {
@@ -123,6 +131,41 @@ Given('these lobbies exist:', async function (this: World, lobbies: DataTable) {
   })
 })
 
+Given('these peers exist:', async function (this: World, peers: DataTable) {
+  if (this.testproxyURL === undefined) {
+    throw new Error('testproxy not active')
+  }
+
+  const columns: string[] = []
+  const values: string[] = []
+
+  peers.hashes().forEach(row => {
+    const v: string[] = []
+
+    Object.keys(row).forEach(key => {
+      const value = row[key]
+      if (!columns.includes(key)) {
+        columns.push(key)
+      }
+
+      if (value === 'null') {
+        v.push('NULL')
+      } else if (key === 'latency_vector') {
+        v.push(`ARRAY[${value.substring(1, value.length - 1)}]::vector(11)`)
+      } else {
+        v.push(`'${value}'`)
+      }
+    })
+
+    values.push(`(${v.join(', ')})`)
+  })
+
+  await fetch(`${this.testproxyURL}/sql`, {
+    method: 'POST',
+    body: 'INSERT INTO peers (' + columns.join(', ') + ') VALUES ' + values.join(', ')
+  })
+})
+
 When('{string} creates a network for game {string}', async function (this: World, playerName: string, gameID: string) {
   await this.createPlayer(playerName, gameID)
 })
@@ -307,7 +350,7 @@ Then('{string} should have received only these lobbies:', function (this: World,
   expectedLobbies.hashes().forEach(row => {
     const correctCodeLobby = player.lastReceivedLobbies.filter(lobby => lobby.code === row.code)
     if (correctCodeLobby.length !== 1) {
-      throw new Error(`expected to find one lobby with code ${row.code} but found ${correctCodeLobby.length}`)
+      throw new Error(`expected to find one lobby with code ${row.code} but found ${correctCodeLobby.length} in [${player.lastReceivedLobbies.map(l => l.code).join(', ')}]`)
     }
     const lobby = correctCodeLobby[0] as any
     Object.keys(lobby).forEach(key => {
@@ -318,8 +361,14 @@ Then('{string} should have received only these lobbies:', function (this: World,
     })
     const want = row as any
     Object.keys(row).forEach(key => {
-      if (`${lobby[key] as string}` !== `${want[key] as string}`) {
-        throw new Error(`expected ${key} to be ${want[key] as string} but got ${lobby[key] as string}`)
+      if (typeof lobby[key] === 'object') {
+        if (JSON.stringify(lobby[key]) !== `${want[key] as string}`) {
+          throw new Error(`expected ${key} to be ${want[key] as string} but got ${JSON.stringify(lobby[key])}`)
+        }
+      } else {
+        if (`${lobby[key] as string}` !== `${want[key] as string}`) {
+          throw new Error(`expected ${key} to be ${want[key] as string} but got ${lobby[key] as string}`)
+        }
       }
     })
   })
@@ -435,3 +484,16 @@ Then('{string} failed to join the lobby', function (playerName: string) {
     throw new Error(`player is in lobby ${player.network.currentLobby as string}`)
   }
 })
+
+When('the next peer\'s latency vector is set to:', function (latencies: string) {
+  if (latencies === 'null') {
+    this.latencyVector = null
+    return
+  }
+
+  const lv = latencies.split(',').map(s => parseInt(s.trim(), 10))
+  if (lv.length !== 11) {
+    throw new Error('latency vector must have 11 elements')
+  }
+  this.latencyVector = lv
+})

features/support/world.ts

@@ -7,6 +7,7 @@ import ws from 'ws'
 import wrtc from '@roamhq/wrtc'
 
 import { Player } from './types'
+import { PeerConfiguration } from '../../lib/types'
 
 import { Network } from '../../lib'
 
@@ -35,6 +36,7 @@ export class World extends CucumberWorld {
   public testproxyURL?: string
   public useTestProxy: boolean = false
   public databaseURL?: string
+  public latencyVector: number[] = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
 
   public players: Map<string, Player> = new Map<string, Player>()
   public lastError: Map<string, Error> = new Map<string, Error>()
@@ -49,7 +51,13 @@ export class World extends CucumberWorld {
 
   public async createPlayer (playerName: string, gameID: string): Promise<Player> {
     return await new Promise((resolve) => {
-      const config = this.useTestProxy ? { testproxyURL: this.testproxyURL } : undefined
+      const config: PeerConfiguration = {}
+      if (this.useTestProxy) {
+        config.testproxyURL = this.testproxyURL
+      }
+      config.testLatency = {
+        vector: this.latencyVector
+      }
       const network = new Network(gameID, config, this.signalingURL)
       const player = new Player(playerName, network)
       this.players.set(playerName, player)
@@ -100,6 +108,7 @@ AfterAll(function () {
 
 Before(function (this: World) {
   this.scenarioRunning = true
+  this.latencyVector = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
 })
 After(function (this: World, { result }) {
   this.scenarioRunning = false

go.mod

@@ -8,6 +8,7 @@ require (
 	github.com/jackc/pgx/v5 v5.7.6
 	github.com/koenbollen/logging v0.0.0-20230520102501-e01d64214504
 	github.com/ory/dockertest/v3 v3.12.0
+	github.com/pgvector/pgvector-go v0.3.0
 	github.com/poki/mongodb-filter-to-postgres v1.0.7
 	github.com/rs/cors v1.11.1
 	github.com/rs/xid v1.6.0
@@ -44,6 +45,7 @@ require (
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/rogpeppe/go-internal v1.14.1 // indirect
 	github.com/sirupsen/logrus v1.9.3 // indirect
+	github.com/x448/float16 v0.8.4 // indirect
 	github.com/xeipuuv/gojsonpointer v0.0.0-20190905194746-02993c407bfb // indirect
 	github.com/xeipuuv/gojsonreference v0.0.0-20180127040603-bd5ef7bd5415 // indirect
 	github.com/xeipuuv/gojsonschema v1.2.0 // indirect