Module: Elabs::ThumbnailsHelper

Defined in:
app/helpers/elabs/thumbnails_helper.rb

Constant Summary collapse

THUMBNAILS_DIMENSIONS = 
{
  small:  '50x50',
  medium: '300x300'
}.freeze
AVATAR_DIMENSIONS = 
{
  large:  '512',
  medium: '256',
  small:  '64'
}.freeze

Instance Method Summary collapse

Instance Method Details

#avatar_image(avatar, size = :medium) ⇒ Object 



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# File 'app/helpers/elabs/thumbnails_helper.rb', line 35

def avatar_image(avatar, size = :medium)
  resize_and_center_crop avatar, AVATAR_DIMENSIONS[size]
end

#image_resize_properties(size = :page) ⇒ Object 



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# File 'app/helpers/elabs/thumbnails_helper.rb', line 24

def image_resize_properties(size = :page)
  dimensions = case size
               when :large
                 '1920x1080'
               else
                 '960x540' # page size
               end

  { resize: dimensions }
end

#resize_and_center_crop(entity, size) ⇒ Object 



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# File 'app/helpers/elabs/thumbnails_helper.rb', line 39

def resize_and_center_crop(entity, size)
  x           = entity.blob.metadata[:width].to_f
  y           = entity.blob.metadata[:height].to_f
  bigger_size = x < y ? x : y

  options = { combine_options: { gravity: 'center', crop: "#{bigger_size}x#{bigger_size}+0+0", resize: size.to_s } }
  main_app.url_for(entity.representation(options).processed)
end

#thumbnail_center_crop(document, size = :medium) ⇒ Object 



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# File 'app/helpers/elabs/thumbnails_helper.rb', line 14

def thumbnail_center_crop(document, size = :medium)
  return resize_and_center_crop(document, AVATAR_DIMENSIONS[size]) if document.representable?

  thumbnail_preview_placeholder_file
end

#thumbnail_preview_placeholder_file ⇒ Object 



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# File 'app/helpers/elabs/thumbnails_helper.rb', line 20

def thumbnail_preview_placeholder_file
  '/assets/elabs/preview_placeholder.png'
end