test: refactor settings

src/adapters/web-server-adapter.ts

@@ -2,13 +2,14 @@ import { Duplex, EventEmitter } from 'stream'
 import { IncomingMessage, Server, ServerResponse } from 'http'
 import packageJson from '../../package.json'
 
+import { ISettings } from '../@types/settings'
 import { IWebServerAdapter } from '../@types/adapters'
-import { Settings } from '../utils/settings'
 
 export class WebServerAdapter extends EventEmitter implements IWebServerAdapter {
 
   public constructor(
     private readonly webServer: Server,
+    private readonly settings: () => ISettings,
   ) {
     super()
     this.webServer.on('request', this.onWebServerRequest.bind(this))
@@ -25,7 +26,7 @@ export class WebServerAdapter extends EventEmitter implements IWebServerAdapter
     if (request.method === 'GET' && request.headers['accept'] === 'application/nostr+json') {
       const {
         info: { name, description, pubkey, contact },
-      } = Settings
+      } = this.settings()
 
       const relayInformationDocument = {
         name,

src/adapters/web-socket-server-adapter.ts

@@ -5,6 +5,7 @@ import { IWebSocketAdapter, IWebSocketServerAdapter } from '../@types/adapters'
 import { WebSocketAdapterEvent, WebSocketServerAdapterEvent } from '../constants/adapter'
 import { Event } from '../@types/event'
 import { Factory } from '../@types/base'
+import { ISettings } from '../@types/settings'
 import { propEq } from 'ramda'
 import { WebServerAdapter } from './web-server-adapter'
 
@@ -22,9 +23,10 @@ export class WebSocketServerAdapter extends WebServerAdapter implements IWebSock
     private readonly createWebSocketAdapter: Factory<
       IWebSocketAdapter,
       [WebSocket, IncomingMessage, IWebSocketServerAdapter]
-    >
+    >,
+    settings: () => ISettings,
   ) {
-    super(webServer)
+    super(webServer, settings)
 
     this.webSocketsAdapters = new WeakMap()
 

src/factories/message-handler-factory.ts

@@ -1,4 +1,5 @@
 import { IncomingMessage, MessageType } from '../@types/messages'
+import { createSettings } from './settings-factory'
 import { DelegatedEventMessageHandler } from '../handlers/delegated-event-message-handler'
 import { delegatedEventStrategyFactory } from './delegated-event-strategy-factory'
 import { EventMessageHandler } from '../handlers/event-message-handler'
@@ -6,7 +7,6 @@ import { eventStrategyFactory } from './event-strategy-factory'
 import { IEventRepository } from '../@types/repositories'
 import { isDelegatedEvent } from '../utils/event'
 import { IWebSocketAdapter } from '../@types/adapters'
-import { Settings } from '../utils/settings'
 import { SubscribeMessageHandler } from '../handlers/subscribe-message-handler'
 import { UnsubscribeMessageHandler } from '../handlers/unsubscribe-message-handler'
 
@@ -17,13 +17,17 @@ export const messageHandlerFactory = (
     case MessageType.EVENT:
       {
         if (isDelegatedEvent(message[1])) {
-          return new DelegatedEventMessageHandler(adapter, delegatedEventStrategyFactory(eventRepository), Settings)
+          return new DelegatedEventMessageHandler(
+            adapter,
+            delegatedEventStrategyFactory(eventRepository),
+            createSettings
+          )
         }
 
-        return new EventMessageHandler(adapter, eventStrategyFactory(eventRepository), Settings)
+        return new EventMessageHandler(adapter, eventStrategyFactory(eventRepository), createSettings)
       }
     case MessageType.REQ:
-      return new SubscribeMessageHandler(adapter, eventRepository)
+      return new SubscribeMessageHandler(adapter, eventRepository, createSettings)
     case MessageType.CLOSE:
       return new UnsubscribeMessageHandler(adapter,)
     default:

src/factories/settings-factory.ts

@@ -0,0 +1,4 @@
+import { ISettings } from '../@types/settings'
+import { SettingsStatic } from '../utils/settings'
+
+export const createSettings = (): ISettings => SettingsStatic.createSettings()

src/handlers/event-message-handler.ts

@@ -13,7 +13,7 @@ export class EventMessageHandler implements IMessageHandler {
   public constructor(
     protected readonly webSocket: IWebSocketAdapter,
     protected readonly strategyFactory: Factory<IEventStrategy<Event, Promise<void>>, [Event, IWebSocketAdapter]>,
-    private readonly settings: ISettings
+    private readonly settings: () => ISettings
   ) { }
 
   public async handleMessage(message: IncomingEventMessage): Promise<void> {
@@ -49,7 +49,7 @@ export class EventMessageHandler implements IMessageHandler {
 
   protected canAcceptEvent(event: Event): string | undefined {
     const now = Math.floor(Date.now()/1000)
-    const limits = this.settings.limits.event
+    const limits = this.settings().limits.event
     if (limits.createdAt.maxPositiveDelta > 0) {
       if (event.created_at > now + limits.createdAt.maxPositiveDelta) {
         return `created_at is more than ${limits.createdAt.maxPositiveDelta} seconds in the future`

src/handlers/subscribe-message-handler.ts

@@ -8,8 +8,8 @@ import { streamEach, streamEnd, streamFilter, streamMap } from '../utils/stream'
 import { SubscriptionFilter, SubscriptionId } from '../@types/subscription'
 import { Event } from '../@types/event'
 import { IEventRepository } from '../@types/repositories'
+import { ISettings } from '../@types/settings'
 import { IWebSocketAdapter } from '../@types/adapters'
-import { Settings } from '../utils/settings'
 import { SubscribeMessage } from '../@types/messages'
 import { WebSocketAdapterEvent } from '../constants/adapter'
 
@@ -19,6 +19,7 @@ export class SubscribeMessageHandler implements IMessageHandler, IAbortable {
   public constructor(
     private readonly webSocket: IWebSocketAdapter,
     private readonly eventRepository: IEventRepository,
+    private readonly settings: () => ISettings,
   ) {
     this.abortController = new AbortController()
   }
@@ -66,7 +67,7 @@ export class SubscribeMessageHandler implements IMessageHandler, IAbortable {
   }
 
   private canSubscribe(subscriptionId: string, filters: SubscriptionFilter[]): string | undefined {
-    const maxSubscriptions = Settings.limits.client.subscription.maxSubscriptions
+    const maxSubscriptions = this.settings().limits.client.subscription.maxSubscriptions
     if (maxSubscriptions > 0) {
       const subscriptions = this.webSocket.getSubscriptions()
       if (!subscriptions.has(subscriptionId) && subscriptions.size + 1 > maxSubscriptions) {
@@ -74,7 +75,7 @@ export class SubscribeMessageHandler implements IMessageHandler, IAbortable {
       }
     }
 
-    const maxFilters = Settings.limits.client.subscription.maxFilters
+    const maxFilters = this.settings().limits.client.subscription.maxFilters
     if (maxFilters > 0) {
       if (filters.length > maxFilters) {
         return `Too many filters: Number of filters per susbscription must be less or equal to ${maxFilters}`

src/index.ts

@@ -4,6 +4,7 @@ import http from 'http'
 import process from 'process'
 import { WebSocketServer } from 'ws'
 
+import { createSettings } from './factories/settings-factory'
 import { EventRepository } from './repositories/event-repository'
 import { getDbClient } from './database/client'
 import packageJson from '../package.json'
@@ -64,7 +65,8 @@ if (cluster.isPrimary) {
   const adapter = new WebSocketServerAdapter(
     server,
     wss,
-    webSocketAdapterFactory(eventRepository)
+    webSocketAdapterFactory(eventRepository),
+    createSettings,
   )
 
   adapter.listen(port)

src/utils/settings.ts

@@ -1,4 +1,4 @@
-import { existsSync, readFileSync, writeFileSync } from 'fs'
+import fs from 'fs'
 import { homedir } from 'os'
 import { join } from 'path'
 import { mergeDeepRight } from 'ramda'
@@ -6,85 +6,94 @@ import { mergeDeepRight } from 'ramda'
 import { ISettings } from '../@types/settings'
 import packageJson from '../../package.json'
 
-export const getSettingsFilePath = (filename = 'settings.json'): string => join(
+export class SettingsStatic {
-  process.env.NOSTR_CONFIG_DIR ?? join(homedir(), '.nostr'),
+  static _settings: ISettings
-  filename,
-)
 
-let _settings: ISettings
+  public static getSettingsFilePath(filename = 'settings.json') {
+    return join(
+      process.env.NOSTR_CONFIG_DIR ?? join(homedir(), '.nostr'),
+      filename
+    )
+  }
 
-export const getDefaultSettings = (): ISettings => ({
+  public static getDefaultSettings(): ISettings {
-  info: {
+    return {
-    relay_url: `wss://${packageJson.name}.your-domain.com`,
+      info: {
-    name: `${packageJson.name}.your-domain.com`,
+        relay_url: 'wss://nostr-ts-relay.your-domain.com',
-    description: packageJson.description,
+        name: `${packageJson.name}.your-domain.com`,
-    pubkey: '',
+        description: packageJson.description,
-    contact: 'operator@your-domain.com',
+        pubkey: 'replace-with-your-pubkey',
-  },
+        contact: 'operator@your-domain.com',
-  limits: {
-    event: {
-      eventId: {
-        minLeadingZeroBits: 0,
       },
-      kind: {
+      limits: {
-        whitelist: [],
+        event: {
-        blacklist: [],
+          eventId: {
+            minLeadingZeroBits: 0,
+          },
+          kind: {
+            whitelist: [],
+            blacklist: [],
+          },
+          pubkey: {
+            minLeadingZeroBits: 0,
+            whitelist: [],
+            blacklist: [],
+          },
+          createdAt: {
+            maxPositiveDelta: 900,
+            maxNegativeDelta: 0, // disabled
+          },
+        },
+        client: {
+          subscription: {
+            maxSubscriptions: 10,
+            maxFilters: 10,
+          },
+        },
       },
-      pubkey: {
+    }
-        minLeadingZeroBits: 0,
+  }
-        whitelist: [],
-        blacklist: [],
-      },
-      createdAt: {
-        maxPositiveDelta: 900, // +15 min
-        maxNegativeDelta: 0, // disabled
-      },
-    },
-    client: {
-      subscription: {
-        maxSubscriptions: 10,
-        maxFilters: 10,
-      },
-    },
-  },
-})
 
-const loadSettings = (path: string) => {
+  public static loadSettings(path: string) {
-  return JSON.parse(
+    return JSON.parse(
-    readFileSync(
+      fs.readFileSync(
+        path,
+        { encoding: 'utf-8' }
+      )
+    )
+  }
+
+  public static createSettings(): ISettings {
+    if (SettingsStatic._settings) {
+      return SettingsStatic._settings
+    }
+    const path = SettingsStatic.getSettingsFilePath()
+    const defaults = SettingsStatic.getDefaultSettings()
+    try {
+
+      if (fs.existsSync(path)) {
+        SettingsStatic._settings = mergeDeepRight(
+          defaults,
+          SettingsStatic.loadSettings(path)
+        )
+      } else {
+        SettingsStatic.saveSettings(path, defaults)
+        SettingsStatic._settings = mergeDeepRight({}, defaults)
+      }
+
+      return SettingsStatic._settings
+    } catch (error) {
+      console.error('Unable to read config file. Reason: %s', error.message)
+
+      return defaults
+    }
+  }
+
+  public static saveSettings(path: string, settings: ISettings) {
+    return fs.writeFileSync(
       path,
-      { encoding: 'utf-8' },
+      JSON.stringify(settings, null, 2),
-    ),
+      { encoding: 'utf-8' }
-  )
+    )
-}
-
-const createSettings = (): ISettings => {
-  const path = getSettingsFilePath()
-  const defaults = getDefaultSettings()
-  try {
-    if (_settings) {
-      return _settings
-    }
-
-    if (!existsSync(path)) {
-      saveSettings(path, defaults)
-    }
-
-    _settings = mergeDeepRight(defaults, loadSettings(path))
-
-    return _settings
-  } catch (error) {
-    console.error('Unable to read config file. Reason: %s', error.message)
-
-    return defaults
   }
 }
-
-export const saveSettings = (path: string, settings: ISettings) => {
-  return writeFileSync(
-    path,
-    JSON.stringify(settings, null, 2),
-    { encoding: 'utf-8' }
-  )
-}
-export const Settings = createSettings()

test/unit/factories/settings-factory.spec.ts

@@ -0,0 +1,24 @@
+import { expect } from 'chai'
+import Sinon from 'sinon'
+
+import { createSettings } from '../../../src/factories/settings-factory'
+import { SettingsStatic } from '../../../src/utils/settings'
+
+describe('getSettings', () => {
+ let createSettingsStub: Sinon.SinonStub
+
+  beforeEach(() => {
+    createSettingsStub = Sinon.stub(SettingsStatic, 'createSettings')
+  })
+
+  afterEach(() => {
+    createSettingsStub.restore()
+  })
+
+  it('calls createSettings and returns', () => {
+    const settings = Symbol()
+    createSettingsStub.returns(settings)
+
+    expect(createSettings()).to.equal(settings)
+  })
+})

test/unit/handlers/event-message-handler.spec.ts

@@ -64,7 +64,7 @@ describe('EventMessageHandler', () => {
       handler = new EventMessageHandler(
         webSocket as any,
         strategyFactoryStub,
-        {} as any,
+        () => ({}) as any,
       )
     })
 
@@ -168,7 +168,7 @@ describe('EventMessageHandler', () => {
       handler = new EventMessageHandler(
         {} as any,
         () => null,
-        settings,
+        () => settings,
       )
     })
 

test/unit/utils/settings.spec.ts

@@ -1,11 +1,13 @@
 import { expect } from 'chai'
+import fs from 'fs'
 import { homedir } from 'os'
 import { join } from 'path'
+import Sinon from 'sinon'
 
-import { getDefaultSettings, getSettingsFilePath } from '../../../src/utils/settings'
+import { SettingsStatic } from '../../../src/utils/settings'
 
-describe('Settings', () => {
+describe('SettingsStatic', () => {
-  describe('getSettingsFilePath', () => {
+  describe('.getSettingsFilePath', () => {
     let originalEnv: NodeJS.ProcessEnv
 
     beforeEach(() => {
@@ -18,40 +20,39 @@ describe('Settings', () => {
     })
 
     it('returns string ending with settings.json by default', () => {
-      expect(getSettingsFilePath()).to.be.a('string').and.to.match(/settings\.json$/)
+      expect(SettingsStatic.getSettingsFilePath()).to.be.a('string').and.to.match(/settings\.json$/)
     })
 
     it('returns string ending with given string', () => {
-      expect(getSettingsFilePath('ending')).to.be.a('string').and.to.match(/ending$/)
+      expect(SettingsStatic.getSettingsFilePath('ending')).to.be.a('string').and.to.match(/ending$/)
     })
 
     it('returns path begins with user\'s home dir by default', () => {
-      expect(getSettingsFilePath()).to.be.a('string').and.equal(`${join(homedir(), '.nostr')}/settings.json`)
+      expect(SettingsStatic.getSettingsFilePath()).to.be.a('string').and.equal(`${join(homedir(), '.nostr')}/settings.json`)
     })
 
     it('returns path with NOSTR_CONFIG_DIR if set', () => {
       process.env.NOSTR_CONFIG_DIR = '/some/path'
 
-      expect(getSettingsFilePath()).to.be.a('string').and.equal('/some/path/settings.json')
+      expect(SettingsStatic.getSettingsFilePath()).to.be.a('string').and.equal('/some/path/settings.json')
     })
   })
 
-  describe('getDefaultSettings', () => {
+  describe('.getDefaultSettings', () => {
     it('returns object with info', () => {
-      expect(getDefaultSettings())
+      expect(SettingsStatic.getDefaultSettings())
         .to.have.property('info')
         .and.to.deep.equal({
           relay_url: 'wss://nostr-ts-relay.your-domain.com',
           name: 'nostr-ts-relay.your-domain.com',
           description: 'A nostr relay written in Typescript.',
-          pubkey: '',
+          pubkey: 'replace-with-your-pubkey',
           contact: 'operator@your-domain.com',
         })
     })
 
-
     it('returns object with default limits', () => {
-      expect(getDefaultSettings())
+      expect(SettingsStatic.getDefaultSettings())
         .to.have.property('limits')
         .and.to.deep.equal({
           event: {
@@ -82,15 +83,156 @@ describe('Settings', () => {
     })
   })
 
-  // describe('loadSettings', () => {
+  describe('.loadSettings', () => {
+    let readFileSyncStub: Sinon.SinonStub
 
-  // })
+    beforeEach(() => {
+      readFileSyncStub = Sinon.stub(fs, 'readFileSync')
+    })
 
-  // describe('createSettings', () => {
+    afterEach(() => {
+      readFileSyncStub.restore()
+    })
 
-  // })
+    it('loads settings from given path', () => {
+      readFileSyncStub.returns('"content"')
 
-  // describe('saveSettings', () => {
+      expect(SettingsStatic.loadSettings('/some/path')).to.equal('content')
 
-  // })
+      expect(readFileSyncStub).to.have.been.calledOnceWithExactly(
-})
+        '/some/path',
+        { encoding: 'utf-8' }
+      )
+    })
+  })
+
+  describe('.createSettings', () => {
+    let existsSyncStub: Sinon.SinonStub
+    let getSettingsFilePathStub: Sinon.SinonStub
+    let getDefaultSettingsStub: Sinon.SinonStub
+    let saveSettingsStub: Sinon.SinonStub
+    let loadSettingsStub: Sinon.SinonStub
+
+    let sandbox: Sinon.SinonSandbox
+
+    beforeEach(() => {
+      SettingsStatic._settings = undefined
+
+      sandbox = Sinon.createSandbox()
+
+      existsSyncStub = sandbox.stub(fs, 'existsSync')
+      getSettingsFilePathStub = sandbox.stub(SettingsStatic, 'getSettingsFilePath')
+      getDefaultSettingsStub = sandbox.stub(SettingsStatic, 'getDefaultSettings')
+      saveSettingsStub = sandbox.stub(SettingsStatic, 'saveSettings')
+      loadSettingsStub = sandbox.stub(SettingsStatic, 'loadSettings')
+    })
+
+    afterEach(() => {
+      sandbox.restore()
+    })
+
+    it('creates settings from default if settings file is missing', () => {
+      getDefaultSettingsStub.returns({})
+      getSettingsFilePathStub.returns('/some/path/settings.json')
+      existsSyncStub.returns(false)
+
+      expect(SettingsStatic.createSettings()).to.deep.equal({})
+
+      expect(existsSyncStub).to.have.been.calledOnceWithExactly('/some/path/settings.json')
+      expect(getSettingsFilePathStub).to.have.been.calledOnce
+      expect(getDefaultSettingsStub).to.have.been.calledOnce
+      expect(saveSettingsStub).to.have.been.calledOnceWithExactly(
+        '/some/path/settings.json',
+        {},
+      )
+      expect(loadSettingsStub).not.to.have.been.called
+    })
+
+    it('returns default settings if saving settings file throws', () => {
+      const error = new Error('mistakes were made')
+      const defaults = Symbol()
+      getSettingsFilePathStub.returns('/some/path/settings.json')
+      getDefaultSettingsStub.returns(defaults)
+      saveSettingsStub.throws(error)
+      existsSyncStub.returns(false)
+
+      expect(SettingsStatic.createSettings()).to.equal(defaults)
+
+      expect(existsSyncStub).to.have.been.calledOnceWithExactly('/some/path/settings.json')
+      expect(getSettingsFilePathStub).to.have.been.calledOnce
+      expect(getDefaultSettingsStub).to.have.been.calledOnce
+      expect(saveSettingsStub).to.have.been.calledOnceWithExactly(
+        '/some/path/settings.json',
+        defaults,
+      )
+      expect(loadSettingsStub).not.to.have.been.called
+    })
+
+    it('loads settings from file if settings file is exists', () => {
+      getDefaultSettingsStub.returns({})
+      loadSettingsStub.returns({})
+      getSettingsFilePathStub.returns('/some/path/settings.json')
+      existsSyncStub.returns(true)
+
+      expect(SettingsStatic.createSettings()).to.deep.equal({})
+
+      expect(existsSyncStub).to.have.been.calledOnceWithExactly('/some/path/settings.json')
+      expect(getSettingsFilePathStub).to.have.been.calledOnce
+      expect(getDefaultSettingsStub).to.have.been.calledOnce
+      expect(saveSettingsStub).not.to.have.been.called
+      expect(loadSettingsStub).to.have.been.calledOnceWithExactly('/some/path/settings.json')
+    })
+
+    it('returns defaults if loading settings file throws', () => {
+      const defaults = Symbol()
+      const error = new Error('mistakes were made')
+      getDefaultSettingsStub.returns(defaults)
+      loadSettingsStub.throws(error)
+      getSettingsFilePathStub.returns('/some/path/settings.json')
+      existsSyncStub.returns(true)
+
+      expect(SettingsStatic.createSettings()).to.equal(defaults)
+
+      expect(existsSyncStub).to.have.been.calledOnceWithExactly('/some/path/settings.json')
+      expect(getSettingsFilePathStub).to.have.been.calledOnce
+      expect(getDefaultSettingsStub).to.have.been.calledOnce
+      expect(saveSettingsStub).not.to.have.been.called
+      expect(loadSettingsStub).to.have.been.calledOnceWithExactly('/some/path/settings.json')
+    })
+
+    it('returns cached settings if set', () => {
+      const cachedSettings = Symbol()
+      SettingsStatic._settings = cachedSettings as any
+
+      expect(SettingsStatic.createSettings()).to.equal(cachedSettings)
+
+      expect(getSettingsFilePathStub).not.to.have.been.calledOnce
+      expect(getDefaultSettingsStub).not.to.have.been.calledOnce
+      expect(existsSyncStub).not.to.have.been.called
+      expect(saveSettingsStub).not.to.have.been.called
+      expect(loadSettingsStub).not.to.have.been.called
+    })
+  })
+
+  describe('.saveSettings', () => {
+    let writeFileSyncStub: Sinon.SinonStub
+
+    beforeEach(() => {
+      writeFileSyncStub = Sinon.stub(fs, 'writeFileSync')
+    })
+
+    afterEach(() => {
+      writeFileSyncStub.restore()
+    })
+
+    it('saves settings to given path', () => {
+      SettingsStatic.saveSettings('/some/path/settings.json', {key: 'value'} as any)
+
+      expect(writeFileSyncStub).to.have.been.calledOnceWithExactly(
+        '/some/path/settings.json',
+        '{\n  "key": "value"\n}',
+        { encoding: 'utf-8' }
+      )
+    })
+  })
+})