Module: CloudhdrHelper

Defined in:
app/helpers/cloudhdr_helper.rb

Instance Method Summary collapse

Instance Method Details

#cloudhdr_image_offline(image_upload, thumbnail = "small", options = {}) ⇒ Object 



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# File 'app/helpers/cloudhdr_helper.rb', line 52

def cloudhdr_image_offline(image_upload,thumbnail="small",options={})
  if !image_upload.web_safe?
    error_div "#{image_upload.filename} can not be displayed directly because it is not web safe. Content type = #{image_upload.content_type}"
  elsif thumbnail.blank? 
    image_tag(image_upload.public_url,options)   
  else
    begin
      # since we're in offline mode here we don't actually have files created for the thumbnail
      # so we return an image with the path to the original, we don't care about cloudhdr_status
      thumbnail = find_thumbnail_attributes(image_upload,thumbnail,options)
      image_tag image_upload.public_url, {:width => thumbnail[:width],:height => thumbnail[:height]}.merge(options)
    rescue ActsAsCloudhdr::ThumbnailAttributesNotFoundError
      error_div "'#{thumbnail}' is not a valid thumbnail name or size string."
    end
  end
end

#cloudhdr_image_online(image_upload, thumbnail = "small", options = {}) ⇒ Object 



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# File 'app/helpers/cloudhdr_helper.rb', line 69

def cloudhdr_image_online(image_upload,thumbnail="small",options={})
  if thumbnail.blank? and !image_upload.web_safe?
    error_div "#{image_upload.filename} can not be displayed directly because it is not web safe. Content type = #{image_upload.content_type}"
  elsif thumbnail.blank? and !image_upload.ready?
    # don't know width and height yet
    image_tag(image_upload.public_url,options)
  elsif thumbnail.blank?
    # now we have width and height
    image_tag(image_upload.public_url,options.merge(:width => image_upload.width, :height => image_upload.height))
  elsif !image_upload.ready?
    begin 
      # We can only look for attributes now to show a pending message with the correct dimensions
      thumb_atts = find_thumbnail_attributes(image_upload,thumbnail,options)
      pending_cloudhdr_thumbnail(image_upload,thumb_atts,options)
    rescue ActsAsCloudhdr::ThumbnailAttributesNotFoundError
      error_div "'#{thumbnail}' is not a valid thumbnail name or size string."
    end
  else
    begin
      thumb = find_or_create_thumbnail(image_upload,thumbnail,options)
      if thumb.ready?
        image_tag thumb.public_url, {:width => thumb[:width],:height => thumb[:height]}.merge(options)
      else
        pending_cloudhdr_thumbnail(image_upload,thumb,options)
      end
    rescue ActsAsCloudhdr::ThumbnailNotFoundError
      error_div "'#{thumbnail}' is not a valid thumbnail name or size string."
    end
  end
end

#cloudhdr_image_thumbnail(image_upload, thumbnail = "small", options = {}) ⇒ Object

Passing a thumbnail is STRONGLY ADVISED Unless you are abosultely sure that you are only accepting web safe image formats you’ll want to supply a thumbnail arg



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# File 'app/helpers/cloudhdr_helper.rb', line 40

def cloudhdr_image_thumbnail(image_upload,thumbnail="small",options={})
  if ActsAsCloudhdr.storeage_mode == "offline"
    cloudhdr_image_offline(image_upload,thumbnail,options)
  else
    cloudhdr_image_online(image_upload,thumbnail,options)
  end
  #return display_image(image_upload,options) if thumbnail.blank?
  #thumbnail = find_or_create_thumbnail(image_upload,thumbnail,options)
  #return display_image_thumbnail(image_upload,thumbnail,options) if thumbnail
  #return error_div "Could not find a thumbnail for: class=#{image_upload.class} thumbnail=#{thumbnail.to_json}"
end

#cloudhdr_link(text, file) ⇒ Object 



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# File 'app/helpers/cloudhdr_helper.rb', line 16

def cloudhdr_link(text,file)
  if file.cloudhdr_status == "ready" or file.cloudhdr_status == "s3"
    link_to text, file.public_filename
  else
    text
  end
end

#cloudhdr_thumbnail(image, thumbnail = "small", options = {}) ⇒ Object

for now we’ll assume that a thumbnail is needed some files aren’t displayable in a native way (NEF etc…)



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# File 'app/helpers/cloudhdr_helper.rb', line 28

def cloudhdr_thumbnail(image,thumbnail="small",options={})
  if image.image?
    return cloudhdr_image_thumbnail(image,thumbnail,options)  
  else
    return error_div("This #{image.class} is not an image.")
  end
end

#error_div(msg) ⇒ Object 



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# File 'app/helpers/cloudhdr_helper.rb', line 208

def error_div(msg)
  %[<div class="cloudhdr_error">#{msg}</div>].html_safe
end

#find_or_create_thumbnail(image_upload, thumbnail = "small", options = {}) ⇒ Object 



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# File 'app/helpers/cloudhdr_helper.rb', line 114

def find_or_create_thumbnail(image_upload,thumbnail="small",options={})
  if thumbnail.is_a? String
    thumb = image_upload.thumbnail_for(thumbnail)
  end
  thumb
end

#find_thumbnail_attributes(image_upload, thumbnail, options) ⇒ Object

def display_image(image_upload,options={})

  if ActsAsCloudhdr.storeage_mode == "offline"
    offline_cloudhdr_image_thumbnail(image_upload,image_upload,options)
  end
end



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# File 'app/helpers/cloudhdr_helper.rb', line 105

def find_thumbnail_attributes(image_upload,thumbnail,options)
   if thumbnail.is_a? String
     thumb_atts = image_upload.thumbnail_attributes_for(thumbnail)
   elsif thumbnail.is_a? Hash
     thumb_atts = thumbnail
   end
   thumb_atts
end

#pending_cloudhdr_thumbnail(photo, thumbnail, options, spinner = 'waiting') ⇒ Object

Thumbnail should either be an ActiveRecord or a Hash



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# File 'app/helpers/cloudhdr_helper.rb', line 154

def pending_cloudhdr_thumbnail(photo,thumbnail,options,='waiting')
  random = SecureRandom.hex(16)
  Rails.logger.debug "======================================================"
  Rails.logger.debug "building pending thumbnail for #{thumbnail.class} #{thumbnail.to_json}"
  if thumbnail.is_a? Hash
    thumb_name = thumbnail[:label]
   else
    thumb_name = thumbnail.thumbnail
  end
  width = thumbnail[:width]
  height = thumbnail[:height]
 
  elemId = "#{photo.class.to_s}_#{photo.id.to_s}_#{thumb_name}_#{random}"

  tag = image_tag "#{}.gif", :size=>"#{width}x#{height}", :id => elemId, "data-cloudhdr-waiting" => true
end

#preview_reload_timeout ⇒ Object 



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# File 'app/helpers/cloudhdr_helper.rb', line 3

def preview_reload_timeout
  #time in ms between preview reloading
  10000
end