Calculator.js

/**
 * @Author: Lycofuture
 * @Date: 2023-05-02 16:07:32
 * @LastEditors: Lycofuture 
 * @LastEditTime: 2023-07-29 10:21:13
 */
import plugin from '../../lib/plugins/plugin.js'
export class Calculator extends plugin {
  constructor() {
    super({
      /** 功能名称 */
      name: '计算器',
      /** 功能描述 */
      dsc: '加减乘除计算器',
      /** https://oicqjs.github.io/oicq/#events */
      event: 'message',
      /** 优先级，数字越小等级越高 */
      priority: 1000,
      rule: [
        {
          /** 命令正则匹配 */
          reg: '^[0-9()（）%]+(:?[\\+\\-\\*\\x\\/\\÷()（）.][0-9()（）%]+)+$',
          /** 执行方法 */
          fnc: 'calc'
        }
      ]
    })
  }
  /**
   *
   * @param e oicq传递的事件参数e
   */
  async calc(e) {
    let emsg = this.e.msg.replace(/#|＃|计算|=/g, '')
    var regk = /[\（]/g,
      regk2 = /[\）]/g
    emsg = emsg
      .replace(regk, '(')
      .replace(regk2, ')')
      .replace('%', '/100')
      .replace('÷', '/')
      .replace('x', '*')
      .replace(/“|”/g, '"')
    let res
    try {
      if (!emsg.match(/[a-zA-Z]/g) || this.e.isMaster) {
        if (!emsg.match(/[\(\)\*\/]/g)) {
          res = jisuan(emsg)
        } else {
          res = await eval(emsg)
        }
      } else {
        this.e.reply('含有非法字符，无法计算')
        return true
      }
    } catch (errorall) {
      this.e.reply(errorall.toString())
      return true
    }
    if (res == emsg) {
      return true
    }
    await this.e.reply(`计算结果：${JSON.stringify(res)}`)
    return true //返回true 阻挡消息不再往下
  }
}
function jisuan(emsg) {
  var preNum = ''
  var nextNum = ''
  var str = ''
  for (let i = 0; i < emsg.length; i++) {
    if (emsg[i] != '+' && emsg[i] != '-') {
      nextNum = nextNum + '' + emsg[i]
    } else if (preNum != '') {
      if (str == '+') {
        preNum = accAdd(preNum, nextNum)
      } else {
        preNum = accSub(preNum, nextNum)
      }
      str = emsg[i]
      nextNum = ''
    } else {
      var preNum = nextNum
      var nextNum = ''
      str = emsg[i]
    }
    console.log(preNum + ' ' + nextNum + ' ' + str)
  }
  if (preNum == '') {
    console.log(preNum + ' ' + nextNum + ' ' + str)
    preNum = nextNum
  } else {
    if (str == '+') {
      preNum = accAdd(preNum, nextNum)
    } else {
      preNum = accSub(preNum, nextNum)
    }
  }
  return preNum
}
/**
 * 数字相加
 * @param {*} arg1
 * @param {*} arg2
 * @returns
 */
function accAdd(arg1, arg2) {
  return changeNum(arg1, arg2)
}
/**
 * 数字相减
 * @param {*} arg1
 * @param {*} arg2
 * @returns
 */
function accSub(arg1, arg2) {
  return changeNum(arg1, arg2, false)
}
/**
 * 数字相乘
 * @param {*} arg1
 * @param {*} arg2
 * @returns
 */
function accMul(arg1, arg2) {
  let m = 0
  m = accAdd(m, getDecimalLength(arg1))
  m = accAdd(m, getDecimalLength(arg2))
  return (getNum(arg1) * getNum(arg2)) / Math.pow(10, m)
}
/**
 * 数字相除
 * @param {*} arg1
 * @param {*} arg2
 * @returns
 */
function accDiv(arg1, arg2) {
  let t1, t2
  t1 = getDecimalLength(arg1)
  t2 = getDecimalLength(arg2)
  if (t1 - t2 > 0) {
    return getNum(arg1) / getNum(arg2) / Math.pow(10, t1 - t2)
  } else {
    return (getNum(arg1) / getNum(arg2)) * Math.pow(10, t2 - t1)
  }
}
function changeNum(arg1 = '', arg2 = '', isAdd = true) {
  function changeInteger(arg, r, maxR) {
    if (r != maxR) {
      let addZero = ''
      for (let i = 0; i < maxR - r; i++) {
        addZero += '0'
      }
      arg = Number(arg.toString().replace('.', '') + addZero)
    } else {
      arg = getNum(arg)
    }
    return arg
  }
  let r1, r2, maxR, m
  r1 = getDecimalLength(arg1)
  r2 = getDecimalLength(arg2)
  maxR = Math.max(r1, r2)
  arg1 = changeInteger(arg1, r1, maxR)
  arg2 = changeInteger(arg2, r2, maxR)
  m = Math.pow(10, maxR)
  if (isAdd) {
    return (arg1 + arg2) / m
  } else {
    return (arg1 - arg2) / m
  }
}
function getDecimalLength(arg = '') {
  try {
    return arg.toString().split('.')[1].length
  } catch (e) {
    return 0
  }
}
function getNum(arg = '') {
  return Number(arg.toString().replace('.', ''))
}