113 lines
5.6 KiB
JavaScript
113 lines
5.6 KiB
JavaScript
'use strict';
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const Service = require('../core/base_service');
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const { Op } = require('sequelize');
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const fileName = "Topic";
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class TopicService extends Service {
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// 学生抽取/读取题目
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async topic(uid, answerId) {
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const { ctx } = this;
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try {
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let contestTopic = await ctx.model4.Examination.findOne({ where: { user_uid: uid } });
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if (!contestTopic) {
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const result = await ctx.model4.ChoiceTopic.findAndCountAll();
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// 选择题一共10道，首先获取数据数目
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let bdCardMsg = [];
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// 若不满10道题，则直接将题目 id 放入数组中
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if (result.rows.length < 10 || result.rows.length == 10) {
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bdCardMsg = result.rows.map(item => item.id);
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} else {
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// 创建一个空数组来存储随机数
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let randomNumbers = [];
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// 循环，直到数组中的元素数量达到十个
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while (randomNumbers.length < 10) {
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let arrNum;
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do {
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// 获取一个随机数
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arrNum = Math.floor(Math.random() * result.count);
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} while (randomNumbers.includes(arrNum)); // 检查随机数是否已存在，如果存在则重新抽取
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// 将随机数添加到数组中
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randomNumbers.push(arrNum);
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// 将随机数作为下标，向 bdCardMsg 数组中添加对应题目数据
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bdCardMsg.push(result.rows[arrNum].id);
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}
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}
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const hanzi = "北斗航天科学教育科普导航定位通信";
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const randomCharIndex = Math.floor(Math.random() * hanzi.length);
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const randomChar = hanzi.charAt(randomCharIndex);
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const number = "0123456789";
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const randomNumIndex = Math.floor(Math.random() * number.length);
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const randomNum = number.charAt(randomNumIndex);
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const sensor = ["温度", "湿度", "超声波传感器", "光线"];
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const randomArrCharIndex = Math.floor(Math.random() * sensor.length);
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const randomArrChar = sensor[randomArrCharIndex];
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let sensorData, num;
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if (randomArrChar == "温度") {
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num = Math.floor(Math.random() * 899) + 100;
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num = num.toString().slice(0, -1) + "." + num.toString().slice(-1);
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sensorData = "温度" + num + "度";
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} else if (randomArrChar == "湿度") {
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num = Math.floor(Math.random() * 899) + 100;
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num = num.toString().slice(0, -1) + "." + num.toString().slice(-1);
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sensorData = "湿度" + num + "%";
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} else if (randomArrChar == "超声波传感器") {
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num = Math.floor(Math.random() * 89) + 10;
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sensorData = "距离" + num + "厘米";
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} else if (randomArrChar == "光线") {
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num = Math.floor(Math.random() * 3095) + 1000;
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sensorData = "光线强度" + num;
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}
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const user = await ctx.model4.Account.findOne({ attributes: ['contest_uid'], where: { uid } });
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if (!user) return { code: 404 };
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const contest = await ctx.model4.Contest.findOne({ attributes: ['type'], where: { uid: user.dataValues.contest_uid, status: 0 } });
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if (!contest) return { code: 404 };
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const form = {
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user_uid: uid,
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contest_uid: user.dataValues.contest_uid,
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exam_type: contest.dataValues.type,
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topic1: randomChar,
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topic2: randomNum,
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topic3: bdCardMsg.join(","),
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topic5: sensorData,
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created_at: new Date(),
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};
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contestTopic = await ctx.model4.Examination.create(form, { silent: true });
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if (!contestTopic) return { code: 404 };
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}
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contestTopic.dataValues.topic3.match(/[^a-zA-Z]/g).join('');
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let idArr;
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if (contestTopic.dataValues.updated_at != null) {
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idArr = contestTopic.dataValues.answer.split(",");
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} else {
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idArr = answerId;
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}
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let attributes = ['id', 'card_id', 'encode_type', 'msg_data', 'created_at'],
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where = { id: idArr, user_uid: uid },
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dbOptions = { attributes, where };
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const result = await ctx.model4.TShortMsg.findAndCountAll(dbOptions);
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return { code: 200, examination: contestTopic.dataValues, shortMsg: result.rows };
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} catch (error) {
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const blockName = fileName + "--" + "topic";
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ctx.app.middleware.log('../../serviceLog', blockName + ">>>>" + error);
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return 'error';
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}
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}
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// 系统读取单选题
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async radio(radioArr) {
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const { ctx } = this;
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try {
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const Radio = await ctx.model4.ChoiceTopic.findAll({ attributes: ['id', 'topic', 'options_a', 'options_b', 'options_c', 'options_d'], where: { id: radioArr } });
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return Radio.length == 0 ? false : Radio;
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} catch (error) {
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const blockName = fileName + "--" + "radio";
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ctx.app.middleware.log('../../serviceLog', blockName + ">>>>" + error);
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return 'error';
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}
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}
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}
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module.exports = TopicService; |