ApiCore/ApiCore-Backend/src/site-settings/dto/update-site-settings.dto.ts

import { ApiPropertyOptional } from '@nestjs/swagger';
import { IsOptional, IsUrl, MaxLength, ValidateIf } from 'class-validator';

// An empty string clears the link (stored as null); anything else must be a
// real URL - ValidateIf skips the @IsUrl check only for the empty-string
// "clear" case so a genuinely malformed value still fails validation.
export class UpdateSiteSettingsDto {
  @ApiPropertyOptional({ description: 'Leerer String löscht den Link' })
  @IsOptional()
  @ValidateIf((_, value: string) => value !== '')
  @IsUrl({ require_protocol: true })
  @MaxLength(300)
  youtubeUrl?: string;

  @ApiPropertyOptional({ description: 'Leerer String löscht den Link' })
  @IsOptional()
  @ValidateIf((_, value: string) => value !== '')
  @IsUrl({ require_protocol: true })
  @MaxLength(300)
  instagramUrl?: string;

  @ApiPropertyOptional({ description: 'Leerer String löscht den Link' })
  @IsOptional()
  @ValidateIf((_, value: string) => value !== '')
  @IsUrl({ require_protocol: true })
  @MaxLength(300)
  tiktokUrl?: string;
}