Add PollutantType enum and update AQI-related entities and services to use it

src/aqi/dto/get-aqi.dto.ts

@@ -1,3 +1,4 @@
+import { PollutantType } from '@app/common/constants/pollutants.enum';
 import { ApiProperty } from '@nestjs/swagger';
 import { Matches, IsNotEmpty, IsString } from 'class-validator';
 
@@ -16,8 +17,8 @@ export class GetAqiDailyBySpaceDto {
 export class GetAqiPollutantBySpaceDto {
   @ApiProperty({
     description: 'Pollutant Type',
-    enum: ['aqi', 'pm25', 'pm10', 'voc', 'co2', 'ch2o'],
-    example: 'aqi',
+    enum: PollutantType,
+    example: PollutantType.AQI,
     required: true,
   })
   @IsString()

src/aqi/services/aqi.service.ts

@@ -10,6 +10,7 @@ import { DataSource } from 'typeorm';
 import { SQL_PROCEDURES_PATH } from '@app/common/constants/sql-query-path';
 import { BaseResponseDto } from '@app/common/dto/base.response.dto';
 import { convertKeysToCamelCase } from '@app/common/helper/camelCaseConverter';
+import { PollutantType } from '@app/common/constants/pollutants.enum';
 
 @Injectable()
 export class AqiService {
@@ -24,15 +25,6 @@ export class AqiService {
     const { monthDate, pollutantType } = query;
     const { spaceUuid } = params;
 
-    // Validate pollutantType against the allowed values
-    const allowedPollutants = ['aqi', 'pm25', 'pm10', 'voc', 'co2', 'ch2o'];
-    if (!allowedPollutants.includes(pollutantType.toLowerCase())) {
-      throw new HttpException(
-        `Invalid pollutant type. Allowed values: ${allowedPollutants.join(', ')}`,
-        HttpStatus.BAD_REQUEST,
-      );
-    }
-
     try {
       const data = await this.executeProcedure(
         'fact_daily_space_aqi',
@@ -95,7 +87,7 @@ export class AqiService {
       );
 
       // Define pollutants dynamically
-      const pollutants = ['aqi', 'pm25', 'pm10', 'voc', 'co2', 'ch2o'];
+      const pollutants = Object.values(PollutantType);
 
       const transformedData = data.map((item) => {
         const date = new Date(item.event_date).toLocaleDateString('en-CA'); // YYYY-MM-DD