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PERF: remove superflous queries from initial page loads

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stop doing expensive work to figure out discourse style sheet
This commit is contained in:
Sam
2014-11-11 15:32:44 +11:00
parent 23ad68678e
commit b2af49251d
3 changed files with 39 additions and 4 deletions
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32
lib/sass/discourse_stylesheets.rb
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@ -7,13 +7,37 @@ class DiscourseStylesheets
MANIFEST_FULL_PATH = "#{MANIFEST_DIR}/stylesheet-manifest"
@lock = Mutex.new
@links = {}
def self.ensure_subscribed!
unless @subscribed
@lock.synchronize do
MessageBus.subscribe("/discourse_stylesheet") do |message|
@lock.synchronize do
@links[message.site_id] = nil
end
end
@subscribed = true
end
end
end
def self.stylesheet_link_tag(target = :desktop)
builder = self.new(target)
ensure_subscribed!
@lock.synchronize do
builder.compile unless File.exists?(builder.stylesheet_fullpath)
builder.ensure_digestless_file
%[<link href="#{Rails.env.production? ? builder.stylesheet_relpath : builder.stylesheet_relpath_no_digest + '?body=1'}" media="all" rel="stylesheet" />].html_safe
links = (@links[RailsMultisite::ConnectionManagement.current_db] ||= {})
tag = links[target]
if !tag
builder = self.new(target)
builder.compile unless File.exists?(builder.stylesheet_fullpath)
builder.ensure_digestless_file
tag = %[<link href="#{Rails.env.production? ? builder.stylesheet_relpath : builder.stylesheet_relpath_no_digest + '?body=1'}" media="all" rel="stylesheet" />].html_safe
links[target] = tag
end
tag
end
end