module IncludeGoogleJs
require 'ping'
@@default_javascripts = ActionView::Helpers::AssetTagHelper::JAVASCRIPT_DEFAULT_SOURCES.dup
@@google_js_libs = %w[prototype scriptaculous jquery jquery-ui mootools dojo yui swfobject]
@@scriptaculous_files = %w[scriptaculous builder controls dragdrop effects slider sound unittest]
@@default_google_js_libs = %w[prototype scriptaculous]
def self.included(base)
base.alias_method_chain :javascript_include_tag, :google_js
end
def javascript_include_tag_with_google_js(*sources)
# split apart the sources, check for :cache, confirm that we're using :include_google_js, and grab :versions
options = sources.extract_options!.stringify_keys
use_cache = options.delete("cache")
javascript_versions = options.delete("versions") || {}
use_google_js = options.delete("include_google_js") && IncludeGoogleJs.confirm_internet_connection
if ActionController::Base.perform_caching && use_cache # Using the locally cached libraries
joined_javascript_name = (use_cache == true ? "all" : use_cache) + ".js"
joined_javascript_path = File.join(ActionView::Helpers::AssetTagHelper::JAVASCRIPTS_DIR, joined_javascript_name)
write_asset_file_contents(joined_javascript_path, compute_javascript_paths(sources))
return javascript_src_tag(joined_javascript_name, options)
else
libraries = IncludeGoogleJs.expand_javascript_sources(sources, use_google_js)
base_html = libraries["local"].collect { |source| javascript_src_tag(source, options) }.join("\n") # local JS files
if use_google_js
html = IncludeGoogleJs.google_script_tags(libraries["google"],javascript_versions)
html += base_html
else
html = base_html
end
return html
end
end
def self.expand_javascript_sources(sources,use_google_libraries)
local_javascript_files = []
google_javascript_files = []
if sources.include?(:all) # All libraries, get everything in the javascripts folder, see which are hosted by Google
if use_google_libraries
local_javascript_files += IncludeGoogleJs.all_non_hosted_local_javascript_files
google_javascript_files += IncludeGoogleJs.all_google_hosted_local_javascript_files
else
local_javascript_files += IncludeGoogleJs.all_local_javascript_files
google_javascript_files += []
end
elsif sources.include?(:defaults)
if use_google_libraries
local_javascript_files += %w[application]
google_javascript_files += IncludeGoogleJs.default_sources
else
local_javascript_files += @@default_javascripts + %w[application]
google_javascript_files += []
end
else
sources = IncludeGoogleJs.check_for_dependencies(sources)
sources.collect do |source|
if IncludeGoogleJs.does_google_host?(source) && use_google_libraries
google_javascript_files << source
else
local_javascript_files << source
end
end
end
return { "google" => google_javascript_files, "local" => local_javascript_files }
end
def self.check_for_dependencies(source)
if source.include?("scriptaculous") && !source.include?("prototype")
source.unshift("prototype")
elsif source.include?("jquery-ui") && !source.include?("jquery")
source.unshift("jquery")
end
return source
end
def self.determine_source(source, collection)
case source
when Symbol
collection[source] || raise(ArgumentError, "No expansion found for #{source.inspect}")
else
source
end
end
def self.google_script_tags(libraries,versions)
html = %Q{
<script src='http://www.google.com/jsapi'></script>
<script>
}
libraries.each do |js_lib|
version = versions.has_key?(js_lib.to_sym) ? versions.fetch(js_lib.to_sym) : IncludeGoogleJs.get_file_version(js_lib)
html += %Q{google.load("#{js_lib}", "#{version}");
}
end
html += %Q{</script>
}
end
def self.all_local_javascript_files
Dir[File.join(ActionView::Helpers::AssetTagHelper::JAVASCRIPTS_DIR, '*.js')].collect { |file| File.basename(file).gsub(/\.\w+$/, '') }.sort
end
def self.all_google_hosted_local_javascript_files
all_javascript_files = IncludeGoogleJs.all_local_javascript_files
all_javascript_files.delete_if { |file| !IncludeGoogleJs.does_google_host?(file) }
return all_javascript_files
end
def self.all_non_hosted_local_javascript_files
all_javascript_files = IncludeGoogleJs.all_local_javascript_files
all_javascript_files.delete_if { |file| IncludeGoogleJs.does_google_host?(file) }
all_javascript_files.delete_if { |file| @@scriptaculous_files.include?(file) }
return all_javascript_files
end
def self.remove_google_hosted_libraries_from(array)
google_libraries = []
array.each do |library|
google_libraries << library if IncludeGoogleJs.does_google_host?(library)
end
google_libraries.each do |library|
array.delete(library)
end
return array
end
def self.does_google_host?(file)
@@google_js_libs.include?(file)
end
def self.default_sources
sources = []
sources += @@default_google_js_libs
return sources
end
def self.confirm_internet_connection(url="ajax.googleapis.com")
Ping.pingecho(url,5,80) # --> true or false
end
def self.get_file_version(file)
version = "1"
return IncludeGoogleJs.send("parse_#{file.gsub("-","_")}")
end
def self.parse_prototype(file="prototype")
if File.exist?(File.join(ActionView::Helpers::AssetTagHelper::JAVASCRIPTS_DIR, "#{file}.js"))
File.open(File.join(ActionView::Helpers::AssetTagHelper::JAVASCRIPTS_DIR, "#{file}.js")).each do |line|
return line.match(/[\d.]+/)[0] if line.include?("Version")
end
else
return nil
end
end
def self.parse_scriptaculous(file="scriptaculous")
if File.exist?(File.join(ActionView::Helpers::AssetTagHelper::JAVASCRIPTS_DIR, "#{file}.js"))
File.open(File.join(ActionView::Helpers::AssetTagHelper::JAVASCRIPTS_DIR, "#{file}.js")).each do |line|
return line.match(/scriptaculous.js v([\d.]+)/i)[1]
end
else
return nil
end
end
def self.parse_jquery(file="jquery")
if File.exist?(File.join(ActionView::Helpers::AssetTagHelper::JAVASCRIPTS_DIR, "#{file}.js"))
File.open(File.join(ActionView::Helpers::AssetTagHelper::JAVASCRIPTS_DIR, "#{file}.js")).each do |line|
version_array = line.scan(/jquery:\W?"([\d.]+)"/x).to_s
return version_array.to_s unless version_array.blank?
end
else
return nil
end
end
def self.parse_jquery_ui(file="jquery-ui")
if File.exist?(File.join(ActionView::Helpers::AssetTagHelper::JAVASCRIPTS_DIR, "#{file}.js"))
File.open(File.join(ActionView::Helpers::AssetTagHelper::JAVASCRIPTS_DIR, "#{file}.js")).each do |line|
version_array = line.scan(/version:\W?"([\d.]+)"/x).to_s
return version_array.to_s unless version_array.blank?
end
else
return nil
end
end
def self.parse_mootools(file="mootools")
if File.exist?(File.join(ActionView::Helpers::AssetTagHelper::JAVASCRIPTS_DIR, "#{file}.js"))
File.open(File.join(ActionView::Helpers::AssetTagHelper::JAVASCRIPTS_DIR, "#{file}.js")).each do |line|
return line.match(/version:["|']([\d\.]+)["|']/i)[1] if line.include?("version")
end
else
return nil
end
end
def self.parse_dojo(file="dojo")
if File.exist?(File.join(ActionView::Helpers::AssetTagHelper::JAVASCRIPTS_DIR, "#{file}.js"))
version = nil
File.open(File.join(ActionView::Helpers::AssetTagHelper::JAVASCRIPTS_DIR, "#{file}.js")).each do |line|
match = line.scan(/\b[major|minor|patch]{5,}:([\d]+)/i)
if match.size > 0
version = match.shift.to_s
match.each do |x|
version += "."+x.to_s
end
return version
end
end
else
return nil
end
end
def self.parse_yui
if File.exist?(File.join(ActionView::Helpers::AssetTagHelper::JAVASCRIPTS_DIR, "yui/build/yuiloader/yuiloader-min.js"))
File.open(File.join(ActionView::Helpers::AssetTagHelper::JAVASCRIPTS_DIR, "yui/build/yuiloader/yuiloader-min.js")).each do |line|
return line.match(/^version: ([\d.]+)/i)[1] if line.match(/^version: ([\d.]+)/i)
end
else
return nil
end
end
def self.parse_swfobject
if File.exist?(File.join(ActionView::Helpers::AssetTagHelper::JAVASCRIPTS_DIR, "yui/build/yuiloader/yuiloader-min.js"))
File.open(File.join(ActionView::Helpers::AssetTagHelper::JAVASCRIPTS_DIR, "swfobject/swfobject.js")).each do |line|
return line.match(/SWFObject v([\d\.]+)/i)[1] if line.match(/SWFObject v([\d\.]+)/i)
end
else
return nil
end
end
end
