option selection limit

server/src/interfaces/survey.ts

@@ -63,6 +63,7 @@ export interface DataItem {
 }
 
 export interface Option {
+  limit: number; //此选项总数限额， 0为无限
   text: string;
   others: boolean;
   mustOthers?: boolean;

server/src/modules/surveyResponse/services/surveyResponse.service.ts

@@ -2,13 +2,49 @@ import { Injectable } from '@nestjs/common';
 import { InjectRepository } from '@nestjs/typeorm';
 import { MongoRepository } from 'typeorm';
 import { SurveyResponse } from 'src/models/surveyResponse.entity';
+import { ResponseSchema } from 'src/models/responseSchema.entity';
+import { EXCEPTION_CODE } from 'src/enums/exceptionCode';
+import { HttpException } from 'src/exceptions/httpException';
 @Injectable()
 export class SurveyResponseService {
   constructor(
     @InjectRepository(SurveyResponse)
     private readonly surveyResponseRepository: MongoRepository<SurveyResponse>,
+    @InjectRepository(ResponseSchema)
+    private readonly responseSchemaRepository: MongoRepository<ResponseSchema>,
   ) {}
 
+  //homework: 找到此问卷的scheme
+  async getResponseSchemaByPath(surveyPath: string) {
+    return this.responseSchemaRepository.findOne({
+      where: { surveyPath },
+    });
+  }
+
+  //homework: 提交问卷之前，计算此问卷(surveyPath)的某选择题(field)里某选项(hash)被选的总数
+  async getOptionsInResponseByHash(
+    surveyPath: string,
+    field: string,
+    hash: string,
+  ) {
+    const myOptionsInResponse = await this.surveyResponseRepository.find({
+      where: {
+        surveyPath: surveyPath,
+        //[`data.${field}`]: { $or: [{ $eq: hash }, { $elemMatch: hash }] },
+        $or: [
+          {
+            [`data.${field}`]: hash,
+          },
+          {
+            [`data.${field}`]: { $elemMatch: { $eq: hash } },
+          },
+        ],
+      },
+    });
+    const myOptionsCount = myOptionsInResponse.length;
+    return myOptionsCount;
+  }
+
   async createSurveyResponse({
     data,
     clientTime,
@@ -27,11 +63,40 @@ export class SurveyResponseService {
       optionTextAndId,
     });
 
+    //homework: 根据提交的数据，判断每个选项是否超额
+    const myScheme = await this.getResponseSchemaByPath(
+      newSubmitData.surveyPath,
+    );
+    let myJudge = 1;
+    for (const eachDataItem of myScheme.code.dataConf.dataList) {
+      if (eachDataItem.type === 'radio') {
+        const myField = eachDataItem.field;
+        for (const eachOption of eachDataItem.options) {
+          const myOptionHash = eachOption.hash;
+          if (newSubmitData.data[myField] === myOptionHash) {
+            const temCount = await this.getOptionsInResponseByHash(
+              newSubmitData.surveyPath,
+              myField,
+              myOptionHash,
+            );
+            if (temCount + 1 > eachOption.limit) myJudge = 0;
+          }
+        }
+      }
+    }
+
     // 提交问卷
-    const res = await this.surveyResponseRepository.save(newSubmitData);
+    if (myJudge === 1) {
-    // res是加密后的数据，需要手动调用loaded才会触发解密
+      const res = await this.surveyResponseRepository.save(newSubmitData);
-    res.onDataLoaded();
+      // res是加密后的数据，需要手动调用loaded才会触发解密
-    return res;
+      res.onDataLoaded();
+      return res;
+    } else {
+      throw new HttpException(
+        '超出提交总数限制',
+        EXCEPTION_CODE.RESPONSE_OVER_LIMIT,
+      );
+    }
   }
 
   async getSurveyResponseTotalByPath(surveyPath: string) {