北斗导航定位通信综合实践赛服务系统
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243
app/service/Exam.js
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243
app/service/Exam.js
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'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 = "Exam";
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class ExamService extends Service {
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// 学生获取历史消息
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async getHistoryMsg(uid, body) {
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const { ctx } = this;
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try {
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let { offset, limit, searchOptions, sortOptions } = body;
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offset = (offset - 1) * limit;
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let attributes = ['id', 'card_id', 'encode_type', 'msg_data', 'created_at'],
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where = { user_uid: uid }, order = [], dbOptions, joinSubstring = [],
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substring = ['card_id', 'msg_data'], key = ['encode_type'], between = ['created_at'];
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attributes.forEach(element => {
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if (searchOptions[element]) {
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if (searchOptions[element] == '*空') {
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if (joinSubstring.includes(element)) {
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where[element] = null;
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} else {
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where[element] = [null, ''];
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}
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} else if (substring.includes(element)) {
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where[element] = { [Op.substring]: searchOptions[element] };
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} else if (key.includes(element)) {
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where[element] = searchOptions[element] == "1" ? true : false;
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} else if (between.includes(element)) {
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where[element] = { [Op.between]: [searchOptions[element][0], searchOptions[element][1]] };
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}
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}
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if (sortOptions[element] == true) {
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order.push([element, 'ASC']);
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} else if (sortOptions[element] == false) {
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order.push([element, 'DESC']);
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}
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});
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dbOptions = { attributes, offset, limit, where, order };
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const result = await ctx.model4.TShortMsg.findAndCountAll(dbOptions);
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return result.rows.length == 0 ? false : result;
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} catch (error) {
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const blockName = fileName + "--" + "getHistoryMsg";
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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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// 学生删除历史消息
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async delHistoryMsg(uid, modelType, password, requestMsg) {
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const { ctx } = this;
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try {
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const result = await ctx.model4.Account.findOne({ where: { uid } });
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if (!result || result.dataValues.password !== this.shaForm(password, this.decryptRequest(result.dataValues.salt))) return false;
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let where = {};
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if (modelType == "single") {
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const { card_id, encode_type, msg_data, origin_time } = requestMsg;
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where = { user_uid: uid, card_id, encode_type, msg_data, created_at: origin_time };
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} else if (modelType == "multiple") {
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let card_id = [], encode_type = [], msg_data = [], created_at = [];
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for (const key in requestMsg) {
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requestMsg[key].forEach(element => {
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card_id.push(element.card_id),
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encode_type.push(element.encode_type),
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msg_data.push(element.msg_data),
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created_at.push(element.origin_time)
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});
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}
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where = { user_uid: uid, card_id, encode_type, msg_data, created_at };
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} else if (modelType == "all") {
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where = { user_uid: uid };
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}
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const resetList = await ctx.model4.TShortMsg.destroy({ where });
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return resetList.length == 0 ? false : resetList;
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} catch (error) {
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const blockName = fileName + "--" + "delHistoryMsg";
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ctx.app.middleware.utils.log('../../../serviceLog', blockName + ">>>>" + error);
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return 'error';
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}
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}
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// 学生完成答题
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async answer(uid, body) {
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const { ctx } = this;
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try {
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// 根据 updated_at 来判断是否已经完成过答题，确保只能提交一次答题，如果已经完成答题则不允许再次提交答案
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const userExam = await ctx.model4.Examination.findOne({ attributes: ['topic1', 'topic2', 'topic3', 'topic5'], where: { user_uid: uid, updated_at: null } });
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if (!userExam) return false;
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// 根据答案进行评分
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const shortMsg = await ctx.model4.TShortMsg.findAll({ attributes: ['id', 'msg_data'], where: { user_uid: uid } });
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if (shortMsg.length == 0) return false;
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const { answer1, answer2, answer3, answer4, answer5 } = body;
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const answerObj = {};
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const answerArr = [answer1, answer2, answer3, answer4, answer5];
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shortMsg.forEach(element => {
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if (element.dataValues.id == answer1) {
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if (element.dataValues.msg_data.length > 2) {
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answerObj.answer1 = element.dataValues.msg_data.slice(0, 2);
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} else {
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answerObj.answer1 = element.dataValues.msg_data;
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}
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}
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if (element.dataValues.id == answer2) {
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if (element.dataValues.msg_data.length > 2) {
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answerObj.answer2 = element.dataValues.msg_data.slice(0, 2);
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} else {
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answerObj.answer2 = element.dataValues.msg_data;
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}
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}
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if (element.dataValues.id == answer3) {
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if (element.dataValues.msg_data.length > 10) {
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answerObj.answer3 = element.dataValues.msg_data.slice(0, 10);
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} else {
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answerObj.answer3 = element.dataValues.msg_data;
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}
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}
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if (element.dataValues.id == answer4) {
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if (element.dataValues.msg_data.length > 20) {
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answerObj.answer4 = element.dataValues.msg_data.slice(0, 20);
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} else {
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answerObj.answer4 = element.dataValues.msg_data;
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}
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}
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if (element.dataValues.id == answer5) {
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if (element.dataValues.msg_data.length > 10) {
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answerObj.answer5 = element.dataValues.msg_data.slice(0, 10);
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} else {
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answerObj.answer5 = element.dataValues.msg_data;
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}
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}
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});
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let score = 0;
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let scoreCollection = [];
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if (this.toHalfWidth(answerObj.answer1) == userExam.dataValues.topic1) {
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score = score + 1;
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scoreCollection.push(1);
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} else {
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scoreCollection.push(0);
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}
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if (this.toHalfWidth(answerObj.answer2) == userExam.dataValues.topic2) {
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score = score + 1;
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scoreCollection.push(1);
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} else{
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scoreCollection.push(0);
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}
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let topic3Arr = userExam.dataValues.topic3.split(",");
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const radioAnswer = await ctx.model4.ChoiceTopic.findAll({ attributes: ['id', 'answer'], where: { id: topic3Arr } });
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if (radioAnswer.length == 0) return false;
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let answer3Str = "";
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const radioAnswerObj = {};
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radioAnswer.forEach(item => {
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radioAnswerObj[item.dataValues.id] = item.dataValues.answer;
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});
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topic3Arr.forEach(element => {
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answer3Str = answer3Str + radioAnswerObj[element];
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});
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if (this.toHalfWidth(answerObj.answer3) == answer3Str) {
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score = score + 3;
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scoreCollection.push(1);
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} else {
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scoreCollection.push(0);
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}
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if (this.toHalfWidth(answerObj.answer4).length == 17) {
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const longitude = parseFloat(this.toHalfWidth(answerObj.answer4).slice(0, 3) + "." + this.toHalfWidth(answerObj.answer4).slice(3, 9));
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const latitude = parseFloat(this.toHalfWidth(answerObj.answer4).slice(9, 11) + "." + this.toHalfWidth(answerObj.answer4).slice(11));
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if (-180 <= longitude && longitude <= 180 && -90 <= latitude && latitude <= 90) {
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score = score + 3;
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scoreCollection.push(1);
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} else {
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scoreCollection.push(0);
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}
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}
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if (this.toHalfWidth(answerObj.answer5) == userExam.dataValues.topic5) {
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score = score + 2;
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scoreCollection.push(1);
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} else {
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scoreCollection.push(0);
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}
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const updateMsg = {
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answer: answerArr.join(","),
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answer1: answerObj.answer1,
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answer2: answerObj.answer2,
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answer3: answerObj.answer3,
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answer4: answerObj.answer4,
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answer5: answerObj.answer5,
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score,
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score_collection: scoreCollection.join(","),
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updated_at: new Date(),
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};
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const result = await ctx.model4.Examination.update(updateMsg, { where: { user_uid: uid, updated_at: null } });
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return !result[0] == 0;
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} catch (error) {
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const blockName = fileName + "--" + "answer";
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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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// 学生查看成绩信息
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async grades(uid) {
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const { ctx } = this;
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try {
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let include = [{
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model: ctx.model4.Account,
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attributes: ['account_name'],
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}];
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ctx.model4.Examination.belongsTo(ctx.model4.Account, { foreignKey: 'user_uid', targetKey: 'uid' });
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const userExam = await ctx.model4.Examination.findOne({
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attributes: ['score', 'score_collection', 'created_at', 'updated_at'],
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where: { user_uid: uid, updated_at: { [Op.ne]: null } },
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include
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});
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if (!userExam) return false;
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// 查找得分比当前得分高的数据数目
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const higherScoresCount = await ctx.model4.Examination.findAndCountAll({
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where: {
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score: { [Op.gt]: userExam.dataValues.score },
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updated_at: { [Op.ne]: null }
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}
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});
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// 查找相同得分的所有数据
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const sameScores = await ctx.model4.Examination.findAndCountAll({
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where: {
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score: userExam.dataValues.score,
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created_at: { [Op.lt]: userExam.dataValues.created_at },
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updated_at: { [Op.ne]: null }
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}
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});
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// 计算总排名（比当前得分高的数目 + 相同得分的数目 + 1（当前用户自己））
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const totalRank = higherScoresCount.count + sameScores.count + 1;
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userExam.dataValues.totalRank = totalRank;
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return userExam;
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} catch (error) {
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const blockName = fileName + "--" + "grades";
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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 = ExamService;
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