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110 lines
3.6 KiB
110 lines
3.6 KiB
# Redmine - project management software
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# Copyright (C) 2006-2008 Jean-Philippe Lang
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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module Redmine
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module Hook
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@@listener_classes = []
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@@listeners = nil
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@@hook_listeners = {}
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class << self
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# Adds a listener class.
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# Automatically called when a class inherits from Redmine::Hook::Listener.
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def add_listener(klass)
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raise "Hooks must include Singleton module." unless klass.included_modules.include?(Singleton)
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@@listener_classes << klass
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clear_listeners_instances
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end
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# Returns all the listerners instances.
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def listeners
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@@listeners ||= @@listener_classes.collect {|listener| listener.instance}
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end
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# Returns the listeners instances for the given hook.
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def hook_listeners(hook)
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@@hook_listeners[hook] ||= listeners.select {|listener| listener.respond_to?(hook)}
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end
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# Clears all the listeners.
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def clear_listeners
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@@listener_classes = []
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clear_listeners_instances
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end
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# Clears all the listeners instances.
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def clear_listeners_instances
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@@listeners = nil
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@@hook_listeners = {}
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end
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# Calls a hook.
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# Returns the listeners response.
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def call_hook(hook, context={})
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response = ''
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hook_listeners(hook).each do |listener|
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response << listener.send(hook, context).to_s
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end
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response
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end
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end
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# Base class for hook listeners.
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class Listener
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include Singleton
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# Registers the listener
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def self.inherited(child)
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Redmine::Hook.add_listener(child)
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super
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end
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end
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# Listener class used for views hooks.
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# Listeners that inherit this class will include various helpers by default.
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class ViewListener < Listener
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include ERB::Util
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include ActionView::Helpers::TagHelper
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include ActionView::Helpers::FormHelper
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include ActionView::Helpers::FormTagHelper
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include ActionView::Helpers::FormOptionsHelper
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include ActionView::Helpers::JavaScriptHelper
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include ActionView::Helpers::PrototypeHelper
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include ActionView::Helpers::NumberHelper
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include ActionView::Helpers::UrlHelper
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include ActionView::Helpers::AssetTagHelper
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include ActionView::Helpers::TextHelper
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include ActionController::UrlWriter
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include ApplicationHelper
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end
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# Helper module included in ApplicationHelper so that hooks can be called
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# in views like this:
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# <%= call_hook(:some_hook) %>
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# <%= call_hook(:another_hook, :foo => 'bar' %>
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#
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# Current project is automatically added to the call context.
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module Helper
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def call_hook(hook, context={})
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Redmine::Hook.call_hook(hook, {:project => @project}.merge(context))
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end
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end
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end
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end
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ApplicationHelper.send(:include, Redmine::Hook::Helper)
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ActionController::Base.send(:include, Redmine::Hook::Helper)
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