import SeoFields from '../entity/SeoFields';
import SeoFieldsAdapterInterface from './SeoFieldsAdapterInterface';
import FileFactoryInterface from '../../File/factories/FileFactoryInterface';

export default class SeoFieldsAdapter implements SeoFieldsAdapterInterface {
  protected imageTransformer: FileFactoryInterface;
  
  constructor(imageTransformer: FileFactoryInterface) {
    this.imageTransformer = imageTransformer;
  }
  
  adapt(json: any, instance: SeoFields): SeoFields {
    instance.title = json.title;
    instance.description = json.description;
    
    // Ternary stuff because of split of empty string is array of empty string -> [""].
    instance.keywords = json.keywords ? json.keywords.split(',') : [];
    
    instance.images = (json.images || []).map(each => this.imageTransformer.transformToEntity(each));
    
    return instance;
  }
  
  prepare(instance: SeoFields) {
    const images = (instance.images || []).map(each => this.imageTransformer.transformToPayload(each));
  
    return {
      images,
      seo_title: instance.title,
      meta_description: instance.description,
      keywords: instance.keywords,
    };
  }
  
  transformToEntity(json: any): SeoFields {
    return this.adapt(json, new SeoFields());
  }
  
  transformToPayload(instance: SeoFields): any {
    return this.prepare(instance);
  }
}