first commit

src/modules/posts/dto/update-post.dto.ts

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+import { ApiPropertyOptional } from '@nestjs/swagger';
+import { IsEnum, IsOptional, IsString, IsUrl, Length } from 'class-validator';
+import { PostVisibility } from '../../../common/enums/post-visibility.enum';
+
+export class UpdatePostDto {
+  @ApiPropertyOptional({ maxLength: 2200 })
+  @IsOptional()
+  @IsString()
+  @Length(1, 2200)
+  content?: string;
+
+  @ApiPropertyOptional({ description: 'Set video URL. If provided, audioUrl will be cleared.' })
+  @IsOptional()
+  @IsUrl({ require_tld: false })
+  videoUrl?: string;
+
+  @ApiPropertyOptional({ description: 'Set audio URL. If provided, videoUrl will be cleared.' })
+  @IsOptional()
+  @IsUrl({ require_tld: false })
+  audioUrl?: string;
+
+  @ApiPropertyOptional({ enum: PostVisibility })
+  @IsOptional()
+  @IsEnum(PostVisibility)
+  visibility?: PostVisibility;
+}