swtc-lib/tssrc/request.ts

websocket access for jingtum blockchain

"use strict"

import { EventEmitter } from "events"
import { utils } from "@swtc/utils"

/**
 * request server and account info without secret
 * @param remote
 * @param command
 * @constructor
 */
class Request extends EventEmitter {
  public message
  private _remote
  private _command
  private _filter
  constructor(remote, command = null, filter = v => v) {
    super()
    this._remote = remote
    this._command = command
    this._filter = filter
    // directly modify message is supported
    this.message = {}
  }

  public async submitPromise() {
    return new Promise((resolve, reject) => {
      for (const key in this.message) {
        if (this.message[key] instanceof Error) {
          reject(this.message[key].message)
        }
      }
      this._remote._submit(
        this._command,
        this.message,
        this._filter,
        (error, result) => {
          if (error) {
            reject(error)
          } else {
            resolve(result)
          }
        }
      )
    })
  }

  public submit(callback = m => m) {
    for (const key in this.message) {
      if (this.message[key] instanceof Error) {
        return callback(this.message[key].message)
      }
    }
    this._remote._submit(this._command, this.message, this._filter, callback)
  }

  public selectLedger(ledger) {
    if (typeof ledger === "string" && ~utils.LEDGER_STATES.indexOf(ledger)) {
      this.message.ledger_index = ledger
    } else if (Number(ledger)) {
      this.message.ledger_index = Number(ledger)
    } else if (/^[A-F0-9]+$/.test(ledger)) {
      this.message.ledger_hash = ledger
    } else {
      this.message.ledger_index = "validated"
    }
    return this
  }
}

export { Request }