Module: Potion::Helpers

Included in:
Renderable
Defined in:
lib/potion.rb,
lib/potion/extensions/photo_helper.rb,
lib/potion/extensions/link_to_helper.rb,
lib/potion/extensions/category_helper.rb

Instance Method Summary collapse

Instance Method Details

#category(name) ⇒ Object 



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# File 'lib/potion/extensions/category_helper.rb', line 2

def category(name)
  posts = @site.posts.select do |post|
    post.relative_output_path.split("/").select {|chunk| chunk != ""}[0] == name
  end
  
  posts.sort {|a,b| a.relative_output_path <=> b.relative_output_path}
end

#link_to(arg1, arg2 = nil, &block) ⇒ Object 



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# File 'lib/potion/extensions/link_to_helper.rb', line 2

def link_to(arg1, arg2 = nil, &block)
  raise "link_to requires either an item and a block, or a content string and an item" if arg2.nil? && block.nil?
  
  if block
    content = block.call
    item = arg1
  else
    content = arg1
    item = arg2
  end
  
  "<a href=\"#{item.relative_output_path}\">#{content}</a>"
end

#photo(identifier, attributes = {}) ⇒ Object 



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# File 'lib/potion/extensions/photo_helper.rb', line 2

def photo(identifier, attributes = {})
  raise "\n\nERROR: The 'photo' helper only works for posts.\n\n" unless self.is_a?(Potion::Post)
  
  extensions = [".jpg", ".jpeg", ".png", ".gif"]
  photos = @static_files.select {|file| extensions.include?(File.extname(file.path).downcase)}
  
  if identifier.is_a?(Integer)
    photo = photos.sort {|a,b| a.path <=> b.path }[identifier - 1]
  else
    candidates = photos.select{|photo| File.split(photo.path)[1].include?(identifier)}
    raise "\n\nERROR: '#{identifier}' could refer to more than one photo: #{candidates.map{|x|File.split(x.path)[1]}.inspect} in #{self.path}\n\n" unless candidates.length == 1
    photo = candidates.first
  end
  
  raise "\n\nERROR: No photo matching '#{identifier}' was found in: #{@path}\n\n" if photo.nil?
  attributes_string = ""
  attributes.each_pair {|k,v| attributes_string << "#{k}=\"#{v}\" "}
  "<img #{attributes_string} src=\"#{photo.relative_output_path}\"/>"
end