add dto validation and swagger schemas

src/modules/auth/dto/request-otp.dto.ts

@@ -1,3 +1,11 @@
+import { ApiProperty } from '@nestjs/swagger';
+import { IsString, Matches } from 'class-validator';
+
 export class RequestOtpDto {
+  @ApiProperty({ example: '09122222222' })
+  @IsString()
+  @Matches(/^(\+?\d{10,15}|09\d{9})$/, {
+    message: 'mobile must be a valid mobile number',
+  })
   mobile!: string;
 }

src/modules/auth/dto/verify-otp.dto.ts

@@ -1,4 +1,18 @@
+import { ApiProperty } from '@nestjs/swagger';
+import { IsString, Matches } from 'class-validator';
+
 export class VerifyOtpDto {
+  @ApiProperty({ example: '09122222222' })
+  @IsString()
+  @Matches(/^(\+?\d{10,15}|09\d{9})$/, {
+    message: 'mobile must be a valid mobile number',
+  })
   mobile!: string;
+
+  @ApiProperty({ example: '123456' })
+  @IsString()
+  @Matches(/^\d{4,8}$/, {
+    message: 'code must be 4 to 8 digits',
+  })
   code!: string;
 }