discourse/app/helpers/application_helper.rb

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require 'current_user'
require 'canonical_url'
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require_dependency 'guardian'
require_dependency 'unread'
require_dependency 'age_words'
require_dependency 'configurable_urls'
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module ApplicationHelper
include CurrentUser
include CanonicalURL::Helpers
include ConfigurableUrls
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def discourse_csrf_tags
# anon can not have a CSRF token cause these are all pages
# that may be cached, causing a mismatch between session CSRF
# and CSRF on page and horrible impossible to debug login issues
if current_user
csrf_meta_tags
end
end
def html_classes
"#{mobile_view? ? 'mobile-view' : 'desktop-view'} #{mobile_device? ? 'mobile-device' : 'not-mobile-device'}"
end
def escape_unicode(javascript)
if javascript
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javascript = javascript.dup.force_encoding("utf-8")
unless javascript.valid_encoding?
# work around bust string with a double conversion
javascript.encode!("utf-16","utf-8",:invalid => :replace)
javascript.encode!("utf-8","utf-16")
end
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javascript.gsub!(/\342\200\250/u, '
')
javascript.gsub!(/(<\/)/u, '\u003C/')
javascript.html_safe
else
''
end
end
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def with_format(format, &block)
old_formats = formats
self.formats = [format]
block.call
self.formats = old_formats
nil
end
def age_words(secs)
AgeWords.age_words(secs)
end
def guardian
@guardian ||= Guardian.new(current_user)
end
def mini_profiler_enabled?
defined?(Rack::MiniProfiler) && admin?
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end
def admin?
current_user.try(:admin?)
end
def moderator?
current_user.try(:moderator?)
end
def staff?
current_user.try(:staff?)
end
# Creates open graph and twitter card meta data
def crawlable_meta_data(opts=nil)
opts ||= {}
opts[:image] ||= "#{Discourse.base_url}#{SiteSetting.logo_small_url}"
opts[:url] ||= "#{Discourse.base_url}#{request.fullpath}"
# Add opengraph tags
result = tag(:meta, property: 'og:site_name', content: SiteSetting.title) << "\n"
result << tag(:meta, name: 'twitter:card', content: "summary")
[:image, :url, :title, :description, 'image:width', 'image:height'].each do |property|
if opts[property].present?
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escape = (property != :image)
result << tag(:meta, {property: "og:#{property}", content: opts[property]}, nil, escape) << "\n"
result << tag(:meta, {name: "twitter:#{property}", content: opts[property]}, nil, escape) << "\n"
end
end
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# Add workaround tag for old crawlers which ignores <noscript>
# (see https://developers.google.com/webmasters/ajax-crawling/docs/specification)
result << tag('meta', name: "fragment", content: "!") if SiteSetting.enable_escaped_fragments
result
end
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# Look up site content for a key. If the key is blank, you can supply a block and that
# will be rendered instead.
def markdown_content(key, replacements=nil)
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result = PrettyText.cook(SiteContent.content_for(key, replacements || {})).html_safe
if result.blank? && block_given?
yield
nil
else
result
end
end
def login_path
return "#{Discourse::base_uri}/login"
end
def mobile_view?
return false unless SiteSetting.enable_mobile_theme
if session[:mobile_view]
session[:mobile_view] == '1'
else
mobile_device?
end
end
def mobile_device?
# TODO: this is dumb. user agent matching is a doomed approach. a better solution is coming.
request.user_agent =~ /Mobile|webOS|Nexus 7/ and !(request.user_agent =~ /iPad/)
end
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end