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module ContentHelper
# Returns the published_at attribute of a page if it is not nil, otherwise
# it returns the auto-filled value of the created_at attribute
def date_for_page page
page.published_at.to_s(:db) rescue page.created_at.to_s(:db)
end
# This method is an output filter for templates. It accepts any kind of text
# and checks for an <aggregate /> tag within it. If such a tag is found, its
# attributes are parsed and converted into parameters for the
# render_collection method. The <aggregate /> tag will then be replaced
# entirely with the output of the render_collection method.
#
# Syntax of the <aggregate /> tag:
#
# <aggregate
# flags="update, pressemitteilung"
# limit="20"
# order_by="published_at"
# order_direction="DESC"
# />
def aggregate? content
options = {}
begin
if content =~ /<aggregate([^<>]*)>/
tag = $~.to_s
matched_data = $1.scan(/\w+\=\"[a-zA-Z\s\/_\d,]*\"/)
matched_data.each do |data|
splitted_data = data.split("=")
options[splitted_data[0].to_sym] = splitted_data[1].gsub(/\"/, "")
end
content.sub(tag, render_collection(options))
else
content
end
rescue
content
end
end
# Takes the parameters from the aggregate? method and renders the collection
# from Page.aggregate(options) with a given partial
def render_collection options
render(
:partial => 'content/article',
:collection => Page.aggregate(options)
)
end
end
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