MEDIASTAK

// Arrow functions with types
const processMedia = (media: MediaItem): Promise => {
  return mediaService.process(media);
};

// Destructuring with types
const { title, format, quality } = media;
const [first, ...rest] = mediaItems;

// Parameter destructuring
const createMedia = ({
  title,
  format,
  quality = 'good'
}: Partial): MediaItem => ({
  id: generateId(),
  title,
  format,
  quality,
  createdAt: new Date()
});

// Template literals
const mediaPath = `${basePath}/${format}/${quality}/${filename}`;

// Multiline strings
const query = `
  SELECT * FROM media 
  WHERE format = '${format}' 
  AND quality >= '${minQuality}'
  ORDER BY created_at DESC
`;

// Tagged templates for SQL safety
const sql = (strings: TemplateStringsArray, ...values: any[]) => {
  return strings.reduce((result, string, i) => {
    const value = values[i] ? sanitize(values[i]) : '';
    return result + string + value;
  }, '');
};

// Named exports
export { MediaService, MediaItem };
export const DEFAULT_QUALITY = 'good';

// Default export
export default class MediaProcessor {
  async process(item: MediaItem): Promise {
    // processing logic
  }
}

// Dynamic imports
const loadProcessor = async (format: MediaFormat) => {
  const module = await import(`./processors/${format}`);
  return new module.default();
};

// Import with types
import type { MediaItem, ProcessingResult } from './types';
import { MediaService } from './services';

// Async function with error handling
async function preserveMediaBatch(
  items: MediaItem[]
): Promise {
  const results: ProcessingResult[] = [];
  
  for await (const item of items) {
    try {
      const result = await processMedia(item);
      results.push(result);
    } catch (error) {
      results.push({ 
        item, 
        error: error.message,
        status: 'failed' 
      });
    }
  }
  
  return { results, total: items.length };
}

// Advanced type definitions
type MediaFormat = 'vinyl' | 'vhs' | 'cassette' | 'film';
type QualityLevel = 'poor' | 'fair' | 'good' | 'excellent';

interface MediaItem {
  id: string;
  title: string;
  format: T;
  quality: QualityLevel;
  metadata: FormatMetadata;
}

type FormatMetadata = T extends 'vinyl' 
  ? { rpm: 33 | 45 | 78; size: '7"' | '12"' }
  : T extends 'vhs'
  ? { duration: number; system: 'NTSC' | 'PAL' }
  : T extends 'cassette'
  ? { type: 'I' | 'II' | 'IV'; length: number }
  : { format: '8mm' | '16mm' | '35mm' };

// Utility type examples
type RequiredMedia = Required>;
type PartialUpdate = Partial, 'title' | 'quality'>>;
type MediaKeys = keyof MediaItem<'vinyl'>;

// Custom utility types
type DeepReadonly = {
  readonly [P in keyof T]: T[P] extends object 
    ? DeepReadonly 
    : T[P];
};

type NonNullable = T extends null | undefined ? never : T;

// Mapped types
type MediaValidation = {
  [K in keyof T]: (value: T[K]) => boolean;
};

// Class decorators
@Serializable
@ValidateSchema
class MediaPreservationService {
  @Log('info')
  @Cache(300) // 5 minutes
  async preserveMedia(
    @Validate('required') media: MediaItem
  ): Promise {
    return this.processMedia(media);
  }

  @Deprecated('Use preserveMedia instead')
  @Throttle(1000)
  async oldPreserveMethod(media: any) {
    return this.preserveMedia(media);
  }
}

// Abstract base class
abstract class MediaProcessor {
  protected abstract validateFormat(item: T): boolean;
  
  async process(item: T): Promise {
    if (!this.validateFormat(item)) {
      throw new Error('Invalid format');
    }
    return this.doProcess(item);
  }
  
  protected abstract doProcess(item: T): Promise;
}

// Concrete implementation
class VinylProcessor extends MediaProcessor {
  #settings: ProcessingSettings; // Private field
  
  constructor(settings: ProcessingSettings) {
    super();
    this.#settings = settings;
  }
}

@Component({
  selector: 'media-player',
  templateUrl: './player.html',
  styleUrls: ['./player.css']
})
export class MediaPlayerComponent {
  @Input() mediaUrl: string;
  @Output() playComplete = new EventEmitter();
}

@Injectable()
export class MediaService {
  constructor(
    private http: HttpClient,
    private storage: StorageService
  ) {}
  
  preserveMedia(media: Media) {
    return this.http.post('/api/preserve', media);
  }
}

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