Class: ActiveStorageValidations::Analyzer::ImageAnalyzer

Inherits:
Analyzer
  • Object
show all
Defined in:
lib/active_storage_validations/analyzer/image_analyzer.rb

Overview

ActiveStorageValidations Image Analyzer

This is an abstract base class for image analyzers, which extract width and height from an image attachable.

If the image contains EXIF data indicating its angle is 90 or 270 degrees, its width and height are swapped for convenience.

Example:

ActiveStorageValidations::Analyzer::ImageAnalyzer::ImageMagick.new(attachable).metadata
# => { width: 4104, height: 2736 }

Direct Known Subclasses

ImageMagick, Vips

Defined Under Namespace

Classes: ImageMagick, Vips

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.reset_supported_analyzers_cache! ⇒ Object 



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# File 'lib/active_storage_validations/analyzer/image_analyzer.rb', line 16

def reset_supported_analyzers_cache!
  @supported_analyzers = {}
end

.supported_analyzers ⇒ Object 



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# File 'lib/active_storage_validations/analyzer/image_analyzer.rb', line 20

def supported_analyzers
  @supported_analyzers ||= {}
end

Instance Method Details

#metadata ⇒ Object 



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# File 'lib/active_storage_validations/analyzer/image_analyzer.rb', line 25

def metadata
  return {} unless analyzer_supported?

  read_media do |media|
    if rotated_image?(media)
      { width: media.height, height: media.width }
    else
      { width: media.width, height: media.height }
    end
  end
end