manager.rb
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class Noosfero::Plugin::Manager
attr_reader :environment
attr_reader :context
def initialize(environment, context)
@environment = environment
@context = context
end
delegate :each, :to => :enabled_plugins
include Enumerable
# Dispatches +event+ to each enabled plugin and collect the results.
#
# Returns an Array containing the objects returned by the event method in
# each plugin. This array is compacted (i.e. nils are removed) and flattened
# (i.e. elements of arrays are added to the resulting array). For example, if
# the enabled plugins return 1, 0, nil, and [1,2,3], then this method will
# return [1,0,1,2,3]
#
def dispatch(event, *args)
dispatch_without_flatten(event, *args).flatten
end
def fetch_plugins(event, *args)
map { |plugin| plugin.class if plugin.send(event, *args) }.compact.flatten
end
def dispatch_without_flatten(event, *args)
map { |plugin| plugin.send(event, *args) }.compact
end
alias :dispatch_scopes :dispatch_without_flatten
def dispatch_first(event, *args)
default = Noosfero::Plugin.new.send(event, *args)
result = default
each do |plugin|
result = plugin.send(event, *args)
break if result != default
end
result
end
def fetch_first_plugin(event, *args)
default = Noosfero::Plugin.new.send(event, *args)
result = nil
each do |plugin|
if plugin.send(event, *args) != default
result = plugin.class
break
end
end
result
end
def pipeline(event, *args)
each do |plugin|
result = Array(plugin.send event, *args)
result = result.kind_of?(Array) ? result : [result]
raise ArgumentError, "Pipeline broken by #{plugin.class.name} on #{event} with #{result.length} arguments instead of #{args.length}." if result.length != args.length
args = result
end
args.length < 2 ? args.first : args
end
def filter(property, data)
inject(data) {|data, plugin| data = plugin.send(property, data)}
end
def parse_macro(macro_name, macro, source = nil)
macro_instance = enabled_macros[macro_name] || default_macro
macro_instance.convert(macro, source)
end
def enabled_plugins
environment_enabled_plugins = environment.present? ? environment.enabled_plugins : []
@enabled_plugins ||= (Noosfero::Plugin.all & environment_enabled_plugins).map do |plugin|
Noosfero::Plugin.load_plugin_identifier(plugin).new context
end
end
def default_macro
@default_macro ||= Noosfero::Plugin::Macro.new(context)
end
def enabled_macros
@enabled_macros ||= dispatch(:macros).inject({}) do |memo, macro|
memo.merge!(macro.identifier => macro.new(context))
end
end
def [](class_name)
enabled_plugins.select do |plugin|
plugin.kind_of?(class_name.constantize)
end.first
end
end