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# app/helpers/application_helper.rb:
# Methods added to this helper will be available to all views (i.e. templates)
# in the application.
#
# Copyright (c) 2007 UK Citizens Online Democracy. All rights reserved.
# Email: francis@mysociety.org; WWW: http://www.mysociety.org/
#
# $Id: application_helper.rb,v 1.22 2008-07-09 07:24:50 francis Exp $
require 'languages'
module ApplicationHelper
# URL generating functions are needed by all controllers (for redirects),
# views (for links) and mailers (for use in emails), so include them into
# all of all.
include LinkToHelper
# Site-wide access to configuration settings
include ConfigHelper
# Copied from error_messages_for in active_record_helper.rb
def foi_error_messages_for(*params)
options = params.last.is_a?(Hash) ? params.pop.symbolize_keys : {}
objects = params.collect {|object_name| instance_variable_get("@#{object_name}") }.compact
count = objects.inject(0) {|sum, object| sum + object.errors.count }
unless count.zero?
html = {}
[:id, :class].each do |key|
if options.include?(key)
value = options[key]
html[key] = value unless value.blank?
else
html[key] = 'errorExplanation'
end
end
error_messages = []
for object in objects
object.errors.each do |attr, message|
error_messages << content_tag(:li, message)
end
end
content_tag(:div,
content_tag(:ul, error_messages),
html
)
else
''
end
end
# Highlight words, also escapes HTML (other than spans that we add)
def highlight_words(t, words, html = true)
if html
t = h(t)
end
if html
t = highlight(t, words, '<span class="highlight">\1</span>')
else
t = highlight(t, words, '*\1*')
end
return t
end
def highlight_and_excerpt(t, words, excount, html = true)
newt = excerpt(t, words[0], excount)
if not newt
newt = excerpt(t, '', excount)
end
t = newt
t = highlight_words(t, words, html)
return t
end
def locale_name(locale)
return LanguageNames::get_language_name(locale)
end
# Use our own algorithm for finding path of cache
def foi_cache(name = {}, options = nil, &block)
if @controller.perform_caching
key = name.merge(:only_path => true)
key_path = @controller.foi_fragment_cache_path(key)
if @controller.foi_fragment_cache_exists?(key_path)
cached = @controller.foi_fragment_cache_read(key_path)
output_buffer.concat(cached)
return
end
pos = output_buffer.length
content = block.call
@controller.foi_fragment_cache_write(key_path, output_buffer[pos..-1])
else
block.call
end
end
# (unfortunately) ugly way of getting id of generated form element
# ids
# see http://chrisblunt.com/2009/10/12/rails-getting-the-id-of-form-fields-inside-a-fields_for-block/
def sanitized_object_name(object_name)
object_name.gsub(/\]\[|[^-a-zA-Z0-9:.]/,"_").sub(/_$/,"")
end
def sanitized_method_name(method_name)
method_name.sub(/\?$/, "")
end
def form_tag_id(object_name, method_name, locale=nil)
if locale.nil?
return "#{sanitized_object_name(object_name.to_s)}_#{sanitized_method_name(method_name.to_s)}"
else
return "#{sanitized_object_name(object_name.to_s)}_#{sanitized_method_name(method_name.to_s)}__#{locale.to_s}"
end
end
end
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