contact/lib/cli-view.js

private, one-to-one or many-to-many command line chat

import * as iterm from './iterm.js'
import * as readline from 'node:readline'
import ansi from 'ansi-escape-sequences'
import util from 'node:util'

class CliView extends EventTarget {
  rl
  roomId
  outputStream

  init (options = {}) {
    this.outputStream = options.output
    this.rl = readline.createInterface({
      input: options.input,
      output: options.output,
      completer: options.completer,
      history: options.history,
      removeHistoryDuplicates: true,
      tabSize: 2
    })
    this.rl.prompt()
    this.rl.on('line', line => {
      if (this.outputStream.isTTY) {
        this.outputStream.moveCursor(0, -1)
      }
      this.dispatchEvent(new CustomEvent('line', { detail: line.trim() }))
      this.rl.prompt()
    })
    this.rl.on('close', () => {
      this.dispatchEvent(new CustomEvent('close'))
    })
    this.rl.on('SIGCONT', () => {
      this.rl.resume()
    })
    this.rl.on('history', (history) => {
      this.dispatchEvent(new CustomEvent('history', { detail: history }))
    })
  }

  clearLine () {
    if (this.outputStream?.isTTY) {
      this.outputStream.clearLine(0)
      this.outputStream.cursorTo(0)
    }
  }

  setRoomId (roomId) {
    this.roomId = roomId
    this.rl.setPrompt(`[${roomId}] > `)
    iterm.badge(roomId)
  }

  async displayMessage (msg, options = {}) {
    this.clearLine()
    if (typeof msg === 'string') {
      this.outputStream.write(msg + '\n')
    } else {
      this.outputStream.write(util.inspect(msg, { colors: true }) + '\n')
    }
    if (!options.skipPrompt) {
      this?.rl?.prompt(true)
    }
  }

  async displayMessages (msgs, options = {}) {

  }

  async displayNotification (headers, options = {}) {
    this.clearLine()
    const subType = headers['sub-type']
    const roomId = headers['room-id']
    const from = headers.from
    let text = ''
    if (subType === 'join-room') {
      text = `${from} joined the room`
    } else if (subType === 'leave-room') {
      text = `${from} left the room`
    } else if (subType === 'unread-message') {
      text = `Unread message in room ${roomId} from ${from}`
    } else {
      text = `${subType} ${from}`
    }
    this.outputStream.write(ansi.format(text, ['yellow', 'italic']) + '\n')
    if (!options.skipPrompt) {
      this.rl.prompt(true)
    }
  }

  close () {
    this.clearLine()
    this.rl?.close()
    iterm.badge()
  }
}

export default CliView