module ThumbnailHoverEffect
#
class Image
# image use if such is not specified
IMAGE_NOT_FOUND = '/images/no-image-found.jpg'
# class attributes
attr_accessor :url, # image source url
:attributes # data attributes
# validating input parameters and using defaults if necessary
def initialize(parameters = {})
@url = parameters.fetch(:url, IMAGE_NOT_FOUND)
@attributes = parameters.fetch(:attributes, {})
@url = IMAGE_NOT_FOUND unless File.extname(@url) =~/^(.png|.gif|.jpg|.jpeg|.bmp)$/
@attributes = {} unless @attributes.is_a?(Hash)
end
# rendering image without thumbnail effect
def to_s
"
"
end
# rendering image with thumbnail effect applied
def render(parameters = {})
has_thumbnail = parameters.fetch(:has_thumbnail, true)
effect_number = parameters.fetch(:effect_number, false)
thumbnail_template = self.get_template(effect_number)
if has_thumbnail
@attributes.map { |key, value| thumbnail_template["###{key}##"] &&= value }
thumbnail_template.gsub!('##url##', @url).html_safe
else
self.to_s.html_safe
end
end
# returns the html template
def get_template(effect_number)
"
##title##
##description##
"
end
end
end