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108 lines
4.5 KiB
108 lines
4.5 KiB
#-- encoding: UTF-8
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#-- copyright
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# OpenProject is a project management system.
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# Copyright (C) 2012-2015 the OpenProject Foundation (OPF)
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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 version 3.
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#
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# OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
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# Copyright (C) 2006-2013 Jean-Philippe Lang
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# Copyright (C) 2010-2013 the ChiliProject Team
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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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#
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# See doc/COPYRIGHT.rdoc for more details.
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#++
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################################################################################
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# This concern provides a general implementation of preview functionality #
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# found in different controllers. #
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# #
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# Nevertheless, this concern expects the controller to implement the function #
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# #parse_preview_data. #parse_preview_data must return a list of (wiki) texts, #
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# attachments required to render the texts, and the object. Attachments and #
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# object may be nil. #
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# #
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# You may use #parse_preview_data_helper to implement #parse_preview_data. #
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# Then, a minimal implementation of #parse_preview_data may looks as follows: #
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# #
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# def parse_preview_data #
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# parse_preview_data_helper :work_packages, [:description, :notes] #
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# end #
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# #
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# The first parameter 'param_name' specifies the key in the params object that #
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# contains the values. The second parameter 'attributes' specifies the value #
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# keys. Optionally, if 'param_name' is not equivalent to a class name, you #
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# can pass the objects class as third parameter. #
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# #
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# For object identification #parse_preview_data_helper uses the params #
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# object's 'id' key, if available. If 'id' needs some preprocessing or is not #
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# the id to the object instance, you may override #parse_preview_id to provide #
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# a different id. #
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################################################################################
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module OpenProject::Concerns::Preview
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extend ActiveSupport::Concern
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def preview
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texts, attachments, obj = parse_preview_data
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if obj.nil? || authorize_previewed_object(obj)
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render 'common/preview',
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layout: false,
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locals: { texts: texts, attachments: attachments, previewed: obj }
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end
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end
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protected
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def parse_preview_data_helper(param_name, attributes, klass = nil)
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klass ||= param_name.to_s.classify.constantize
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texts = Array(attributes).each_with_object({}) do |attribute, list|
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caption = (attribute == :notes) ? Journal.human_attribute_name(:notes) : klass.human_attribute_name(attribute)
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text = params[param_name][attribute]
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list[caption] = text
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end
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obj = parse_previewed_object(klass)
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attachments = previewed_object_attachments(obj)
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[texts, attachments, obj]
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end
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private
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def parse_previewed_object(klass)
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id = parse_previewed_id
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id ? klass.find_by(id: id) : nil
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end
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def parse_previewed_id
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params[:id]
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end
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def authorize_previewed_object(obj)
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@project = obj.project
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authorize
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end
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def previewed_object_attachments(obj)
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is_attachable = obj && (obj.respond_to?('attachable') || obj.respond_to?('attachments'))
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is_attachable ? obj.attachments : nil
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end
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end
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