Background:

• IO handler and IO service was originally made to handle this, but it implied user of Public API needed to create the files first and then pass the resulting file value to a binary fieldType, this had usability as well as legacy integration problems (image, files and media files all have slightly different needs and is stored in separate tables)
• In august binary filedTypes were fixed to work, however prior work was not reused, so the result is a fileService which does not know about cluster and is not a 100% good match for cluster

TODO:

• create a API\FieldType\FileService interface based on the best of IOService and Core\FieldType\FileService
  • Make sure it maps well with IOHandler, and make sure IOHandler maps well with what is available in 4.x cluster interface
    • Find a better way to expose image data (getMetaData), that can work with 4.x cluster
    • Change getFileSize to map well to stat api in 4.x cluster
    • Make sure it suits well for FieldType needs (as IOHandler / Service was originally ment for slightly different use case)
• remove IOService
• expose the new FileService via FieldTypeTools
• Refactor binary FieldTypes to use it

NOTE: Time limited to 2 days