Question

我正在尝试计算机票上的危险因素

如果票证是作者的唯一票证，请加10％如果门票价格低于该事件的平均门票价格，则存在风险如果机票的价格比平均价格便宜X％，请在风险中加上X％如果机票的价格比平均价格贵X％，请从风险中扣除X％，最高扣除10％如果票是在工作时间（9-17）添加的，则从风险中扣除10％；否则，将10％添加到风险如果票证上有> 3条评论，则增加5％的风险最小风险为5％（没有任何风险），最大风险为95％。

以下算法应该起作用但是try-catch可以使控制台记录错误

import Moment from 'moment'

export function getRiskfactor(tickets, ticket, users, comments) {
  var riskFactor = 5,
    counter = 0,
    filterTickets = [],
    date,
    ticketPrice = ticket.price,
    sum = 0,
    percentage = 0;

  try {
    const userId = ticket.users.id;
    filterTickets = tickets.filter(ticket => ticket.users.id == userId);
    filterTickets = Object.values(filterTickets);
    counter = filterTickets.length;
    date = Moment(ticket.createdAt).format("H");
  } catch (err) {
    console.log("error");
  }

  // add 10%
  if (counter === 1) riskFactor = 10;

  // ticket lower and higher
  filterTickets.forEach(function (ticket) {
    sum = sum + ticket.price;
  });

  let average = parseInt(sum / counter, 10);
  percentage = Math.abs(parseInt((average - ticketPrice) * 100 / average, 10));
  if (ticketPrice < average) {
    if (percentage > 10) riskFactor += 10;
    else riskFactor += percentage;
  } else {
    if (percentage > 10) riskFactor -= 10;
    else riskFactor -= percentage;
  }

  // business hours
  if (date >= 9 && date <= 17) riskFactor -= 10;
  else riskFactor += 10;

  // comments more than 3
  const filterComments = comments.filter(comment => comment.tickets.id == ticket.id)
  if (filterComments.length > 3) riskFactor += 5;

  // check if its les than 5% or more than 95%
  if (riskFactor < 5) riskFactor = 5;
  if (riskFactor > 95) riskFactor = 95;

  return riskFactor;
}

我将算法加载到票证组件中所有正确的数据都输入到这里

  import React, { PureComponent } from "react";
  import { connect } from "react-redux";
  import Card from "material-ui/Card";
  import CommentForm from "../comments/CommentForm";
  import DisplayComments from "../comments/DisplayComments";
  import { addComment, getAllComments } from "../../actions/comments";
  import { getRiskfactor } from "../logic/calcRisk";

  class TicketDetails extends PureComponent {
    componentWillMount() {
      this.props.getAllComments(); 
    }
    addComment = comment => {
      this.props.addComment(comment);
    };


    render() {
      const { ticket, tickets, comments } = this.props;
      const { users } = ticket;


      return <div>
          <Card className="outer-card">
            <h1>Ticket: {ticket.id}</h1>
            <h2>Price: €{ticket.price}</h2>
            <p>Description: {ticket.description}</p>
            <h2>Image: {ticket.image}</h2>
            <p>Risk: {getRiskfactor(tickets, ticket, users, comments)}%</p>
            <hr />
          </Card>
        <DisplayComments data={this.props}  />
          <CommentForm onSubmit={this.addComment} />
        </div>;
    }
  }


const mapStateToProps = state => {
  return {
    ticket: state.ticket,
    users: state.users,
    tickets: state.tickets,
    comments: state.comments
  };
};
    const mapDispatchToProps = (dispatch) => {
      return {
        addComment: (comment) => dispatch(addComment(comment)),
        getAllComments: () => dispatch(getAllComments())
      };
    };
    export default connect(
      mapStateToProps,
      mapDispatchToProps 
    )(TicketDetails);

计算风险因素

0 个答案: