zooboard/main.js

const { app, BrowserWindow, ipcMain } = require('electron')
const Path = require('node:path')
const URL = require('node:url')
const p = require('node:util').promisify
const Keypair = require('ppppp-keypair')

// WARNING monkey patch! --------------------------------------
const na = require('sodium-native')
na.sodium_malloc = function sodium_malloc_monkey_patched(n) {
  return Buffer.alloc(n)
}
na.sodium_free = function sodium_free_monkey_patched() {}
// Electron > 20.3.8 breaks a napi method that `sodium_malloc`
// depends on to create external buffers. (see v8 memory cage)
//
// This crashes electron when called by various libraries, so
// we monkey-patch this particular function.
// ------------------------------------------------------------

process.env.ZOOBOARD_DATA ??= Path.join(app.getPath('appData'), 'zooboard')
app.setPath('userData', process.env.ZOOBOARD_DATA)
const path = Path.resolve(app.getPath('userData'), 'ppppp')

const keypairPath = Path.join(path, 'keypair.json')
const keypair = Keypair.loadOrCreateSync(keypairPath)
let mainWindow
let globalAccountID = null
let globalAccountName = null

const peer = require('secret-stack/bare')()
  .use(require('secret-stack/plugins/net'))
  .use(require('secret-handshake-ext/secret-stack'))
  .use(require('ppppp-net'))
  .use(require('ppppp-db'))
  .use(require('ppppp-set'))
  .use(require('ppppp-dict'))
  .use(require('ppppp-goals'))
  .use(require('ppppp-sync'))
  .use(require('ppppp-gc'))
  .use(require('ppppp-conductor'))
  .use(require('ppppp-hub-client'))
  .use(require('ppppp-promise'))
  .use(require('ppppp-invite'))
  .call(null, {
    shse: {
      caps: require('ppppp-caps'),
    },
    global: {
      keypair,
      path,
      timers: {
        inactivity: 10 * 60e3,
      },
      connections: {
        incoming: {
          tunnel: [{ transform: 'shse', scope: 'public' }],
        },
        outgoing: {
          net: [{ transform: 'shse' }],
          tunnel: [{ transform: 'shse' }],
        },
      },
    },
    net: {
      autostart: true,
    },
  })

function createWindow() {
  mainWindow = new BrowserWindow({
    width: 1200,
    height: 1200,
    title: 'Zooboard',
    webPreferences: {
      preload: Path.join(__dirname, 'preload.js'),
    },
  })

  const startUrl =
    process.env.ELECTRON_START_URL ??
    URL.format({
      pathname: Path.join(__dirname, '/../build/index.html'),
      protocol: 'file:',
      slashes: true,
    })
  mainWindow.loadURL(startUrl)

  mainWindow.webContents.openDevTools({ mode: 'bottom', activate: true })

  // open Web URLs in the default system browser
  mainWindow.webContents.on('new-window', (ev, url) => {
    ev.preventDefault()
    shell.openExternal(url)
  })
}

async function loadAccount() {
  if (globalAccountID !== null) {
    return { id: globalAccountID, name: globalAccountName }
  }
  await peer.db.loaded()
  const id = await p(peer.db.account.findOrCreate)({ subdomain: 'account' })
  globalAccountID = id
  await p(peer.set.load)(id)
  await p(peer.dict.load)(id)
  const profile = peer.dict.read(id, 'profile')
  const name = profile?.name ?? ''
  globalAccountName = name
  return { id, name }
}

async function setProfileName(ev, name) {
  await p(peer.dict.update)('profile', { name })
  return name
}

async function writeElements(ev, actions) {
  if (globalAccountID === null) throw new Error('account not loaded')
  for (const action of actions) {
    await p(peer.db.feed.publish)({
      account: globalAccountID,
      domain: 'zooboardElements',
      data: action,
    })
  }
}

function subscribeToReadElements() {
  const elementsByID = new Map()
  for (const msg of peer.db.msgs()) {
    if (msg.data && msg.metadata.domain === 'zooboardElements') {
      const { id, isDeleted } = msg.data
      if (isDeleted) {
        elementsByID.delete(id)
      } else {
        elementsByID.set(id, msg.data)
      }
    }
  }
  const initialElements = [...elementsByID.values()]
  mainWindow.webContents.send('readElements', initialElements)

  peer.db.onRecordAdded(({ msg }) => {
    if (msg.data && msg.metadata.domain === 'zooboardElements') {
      mainWindow.webContents.send('readElements', [msg.data])
    }
  })
}

app.whenReady().then(() => {
  ipcMain.handle('loadAccount', loadAccount)
  ipcMain.handle('setProfileName', setProfileName)
  ipcMain.handle('writeElements', writeElements)
  ipcMain.handle('subscribeToReadElements', subscribeToReadElements)
  createWindow()

  app.on('activate', function () {
    if (BrowserWindow.getAllWindows().length === 0) createWindow()
  })
})

app.on('window-all-closed', function () {
  if (process.platform !== 'darwin') app.quit()
})