app/mailers/email_mailer.rb

+
+# Copyright (C) 2015 Centro de Computacao Cientifica e Software Livre
+# Departamento de Informatica - Universidade Federal do Parana
+#
+# This file is part of portalmec.
+#
+# portalmec is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# portalmec is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with portalmec.  If not, see <http://www.gnu.org/licenses/>.
+
+class EmailMailer < ApplicationMailer
+  default from: 'integrada.contato@mec.gov.br'
+
+  def new_email(email, to_address)
+    @email = email
+    mail(subject: @email.subject, to:to_address)
+  end
+end

app/mailers/suggestions_mailer.rb

+
+# Copyright (C) 2015 Centro de Computacao Cientifica e Software Livre
+# Departamento de Informatica - Universidade Federal do Parana
+#
+# This file is part of portalmec.
+#
+# portalmec is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# portalmec is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with portalmec.  If not, see <http://www.gnu.org/licenses/>.
+
+class SuggestionsMailer < ApplicationMailer
+
+    def new_suggestion_received(suggestion)
+        @suggestion = suggestion
+        @subject = "Sugestão de " + @suggestion.name
+        mail(subject: @subject)
+    end
+
+    def suggestion_updated(suggestion)
+        @suggestion = suggestion
+        @subject = "A sugestão de " + @suggestion.name + " foi atualizada"
+        mail(subject: @subject)
+    end
+end

app/mailers/teacher_mailer.rb

+
+# Copyright (C) 2015 Centro de Computacao Cientifica e Software Livre
+# Departamento de Informatica - Universidade Federal do Parana
+#
+# This file is part of portalmec.
+#
+# portalmec is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# portalmec is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with portalmec.  If not, see <http://www.gnu.org/licenses/>.
+
+class TeacherMailer < ApplicationMailer
+  default to: 'integrada.contato@mec.gov.br'
+
+  def new_teacher_received(teacher)
+    @teacher = teacher
+    mail(subject: "Novo professor cadastrado")
+  end
+
+  def teacher_update_received(teacher)
+    @teacher = teacher
+    mail(subject: "Professor cadastrado atualizado")
+  end
+
+  def new_teacher_approved(user)
+    @teacher = user
+    mail(from: "integrada.contato@mec.gov.br", to: @teacher.email, subject: "Cadastro como professor aprovado")
+  end
+
+  def new_teacher_rejected(user)
+    @teacher = user
+    mail(from: "integrada.contato@mec.gov.br", to: @teacher.email, subject: "Cadastro como professor rejeitado")
+  end
+end

app/models/answer.rb

+# Copyright (C) 2015 Centro de Computacao Cientifica e Software Livre
+# Departamento de Informatica - Universidade Federal do Parana
+#
+# This file is part of portalmec.
+#
+# portalmec is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# portalmec is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with portalmec.  If not, see <http://www.gnu.org/licenses/>.
+
+# == Schema Information
+#
+# Table name: answers
+
+# t.integer  "question_id"
+# t.integer  "submission_id"
+# t.boolean  "accepted"
+# t.datetime "created_at",    null: false
+# t.datetime "updated_at",    null: false
+
+class Answer < ApplicationRecord
+  belongs_to :question
+  belongs_to :submission
+
+  validates :submission, :question, presence: true
+end

app/models/application.rb

+
+# Copyright (C) 2015 Centro de Computacao Cientifica e Software Livre
+# Departamento de Informatica - Universidade Federal do Parana
+#
+# This file is part of portalmec.
+#
+# portalmec is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# portalmec is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with portalmec.  If not, see <http://www.gnu.org/licenses/>.
+
 class Application < ApplicationRecord
   belongs_to :user
 

app/models/application_record.rb

+
+# Copyright (C) 2015 Centro de Computacao Cientifica e Software Livre
+# Departamento de Informatica - Universidade Federal do Parana
+#
+# This file is part of portalmec.
+#
+# portalmec is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# portalmec is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with portalmec.  If not, see <http://www.gnu.org/licenses/>.
+
 class ApplicationRecord < ActiveRecord::Base
   self.abstract_class = true
 end

app/models/bookmark.rb

+
+# Copyright (C) 2015 Centro de Computacao Cientifica e Software Livre
+# Departamento de Informatica - Universidade Federal do Parana
+#
+# This file is part of portalmec.
+#
+# portalmec is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# portalmec is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with portalmec.  If not, see <http://www.gnu.org/licenses/>.
+
 # == Schema Information
 #
 # Table name: bookmarks
@@ -20,4 +39,8 @@ class Bookmark < ApplicationRecord
 
   validates_presence_of :user, :bookmarkable
   validates :user_id, uniqueness: { scope: [:bookmarkable_id, :bookmarkable_type] }
+
+  def recipient
+    bookmarkable
+  end
 end

app/models/bug.rb

+
+# Copyright (C) 2015 Centro de Computacao Cientifica e Software Livre
+# Departamento de Informatica - Universidade Federal do Parana
+#
+# This file is part of portalmec.
+#
+# portalmec is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# portalmec is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with portalmec.  If not, see <http://www.gnu.org/licenses/>.
+
 ##Represents a software issue
 class Bug
   include ActiveModel::Model

app/models/carousel.rb

+
+# Copyright (C) 2015 Centro de Computacao Cientifica e Software Livre
+# Departamento de Informatica - Universidade Federal do Parana
+#
+# This file is part of portalmec.
+#
+# portalmec is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# portalmec is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with portalmec.  If not, see <http://www.gnu.org/licenses/>.
+
 # == Schema Information
 #
 # Table name: carousels
@@ -15,8 +34,8 @@
 
 class Carousel < ApplicationRecord
   has_attached_file :image, styles: {
-    larger: "600x600>",
-    thumbnail: "100x100>"
-    }, default_url: "/images/:style/missing.png"
+    larger: '600x600>',
+    thumbnail: '100x100>'
+  }
   validates_attachment_content_type :image, content_type: /\Aimage\/.*\Z/
 end

app/models/collection.rb

+
+# Copyright (C) 2015 Centro de Computacao Cientifica e Software Livre
+# Departamento de Informatica - Universidade Federal do Parana
+#
+# This file is part of portalmec.
+#
+# portalmec is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# portalmec is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with portalmec.  If not, see <http://www.gnu.org/licenses/>.
+
 # == Schema Information
 #
 # Table name: collections
@@ -25,47 +44,83 @@
 class Collection < ApplicationRecord
   include Reviewable
   include Sociable
+  include Downloadable
   include Followable
   include Scoreable
   include Thumbnailable
   include Taggable
+  include Subjectable
+  include Stageable
   include Trackable
   include Highlights
+  include Complainable
+
+  acts_as_paranoid
 
-  has_many :collection_items, as: :collectionable, dependent: :destroy
+  has_many :collection_items, -> { order("position ASC") }, as: :collectionable, dependent: :destroy
+  has_many :collection_items
   has_many :collections, through: :collection_items, source: :collectionable, source_type: 'Collection'
   has_many :learning_objects, through: :collection_items, source: :collectionable, source_type: 'LearningObject'
-  has_many :collection_items
 
-  belongs_to :owner, polymorphic: true
+  belongs_to :owner, polymorphic: true, counter_cache: true
 
   validates :name, :owner, presence: true
-  validates_inclusion_of :privacy, in: %w(public private), message: "Privacy must be public or private"
+  validates_inclusion_of :privacy, in: %w(public private), message: 'Privacy must be public or private'
+
+  before_destroy :delete_index
 
   scope :from_user, ->(user) { where(owner: user) }
 
-  searchkick language: 'brazilian', match: :word_start, searchable: [:name, :description, :author], callbacks: :async
+  searchkick language: 'brazilian', match: :word_start, searchable: [:name, :description, :author], callbacks: :async, index_prefix: Socket.gethostname.downcase, merge_mappings: true, mappings: {
+    collection: {
+      properties: {
+        created_at: {
+          type: "date"
+        }
+      }
+    }
+  }
 
-  acts_as_paranoid
   has_paper_trail
 
   def search_data
+    owner_name = (owner.nil? || owner.name.blank?) ? "" : owner.name
     {
       name: name,
       description: description,
       privacy: privacy,
-      owner: owner.name,
+      owner: owner_name,
+      tags: tags.map(&:name),
+      subjects: subjects.pluck(:id),
+      educational_stages: educational_stages.pluck(:id),
       score: score,
-      created_at: created_at
+      created_at: created_at,
+      likes: likes_count,
+      downloads: downloads_count,
+      review_average: review_ratings_average,
+      empty: collection_items.empty?
     }
   end
 
+
+  def name=(name)
+    write_attribute(:name, name.strip) if !name.blank?
+  end
+
+  def should_index?
+      deleted_at.nil?
+  end
+
+  def delete_index
+    Collection.searchkick_index.remove(self) 
+  end
+
   def owner?(candidate)
     owner == candidate
   end
 
   def user_own?(user)
-    return true if user.is_a? Institution and owner.users.include?(user)
+    return true if user.is_a?(Institution) && owner.users.include?(user)
     return false unless user.is_a? User
     user.is_admin? || owner?(user)
   end
@@ -74,8 +129,48 @@ class Collection < ApplicationRecord
     privacy == 'private'
   end
 
+  def add_items(items)
+    errors = []
+    items.each do |item|
+      col_item = CollectionItem.where(collection: self, collectionable_id: item[:id], collectionable_type: item[:type])
+      if col_item.blank?
+        i = item[:type].constantize.where(id: item[:id]).first
+        unless i.blank?
+          col_item = CollectionItem.create(collection: self, collectionable: i)
+          col_item.set_list_position(item[:position]) unless item[:position].nil?
+        else
+          errors << {error_type:"inexistent", id: item[:id], type: item[:type]}
+        end
+      else
+        errors << {error_type:"repeated", id: item[:id], type: item[:type]}
+      end
+    end
+
+    return errors
+  end
+
+  def delete_items(items)
+    items.each do |item|
+      CollectionItem.find(item[:id]).destroy
+    end
+  end
+
+  def really_delete_items(items)
+    items.each do |item|
+      CollectionItem.find(item[:id]).really_destroy!
+    end
+  end
+
   ## score methods
   def user_category
     owner.try('user_category')
   end
+
+  def download_link
+    '/'+PackageService.link(self)
+  end
+
+  def ignore_changes
+    super + %w(score views_count downloads_count likes_count shares_count follows_count)
+  end
 end

app/models/collection_item.rb

+
+# Copyright (C) 2015 Centro de Computacao Cientifica e Software Livre
+# Departamento de Informatica - Universidade Federal do Parana
+#
+# This file is part of portalmec.
+#
+# portalmec is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# portalmec is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with portalmec.  If not, see <http://www.gnu.org/licenses/>.
+
 # == Schema Information
 #
 # Table name: collection_items
@@ -19,5 +38,24 @@ class CollectionItem < ApplicationRecord
   belongs_to :collectionable, polymorphic: true
 
   validates :collection, :collectionable, presence: true
-  validates :order, uniqueness: true, allow_blank: true
+  acts_as_list scope: :collection
+
+  acts_as_paranoid
+
+  def recipient
+    collection
+  end
+
+  def public?
+    collectionable.privacy == 'public'
+  end
+
+  def owner?(candidate)
+    collectionable.owner == candidate
+  end
+
+  def thumbnail
+    collectionable_type == 'LearningObject' ?  LearningObject.find(collectionable_id).default_thumbnail : Collection.find(collectionable_id).thumbnail
+  end
+
 end

app/models/complaint.rb

+
+# Copyright (C) 2015 Centro de Computacao Cientifica e Software Livre
+# Departamento de Informatica - Universidade Federal do Parana
+#
+# This file is part of portalmec.
+#
+# portalmec is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# portalmec is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with portalmec.  If not, see <http://www.gnu.org/licenses/>.
+
 # == Schema Information
 #
 # Table name: complaints
@@ -5,8 +24,8 @@
 #  id                  :integer          not null, primary key
 #  description         :text
 #  user_id             :integer
-#  complaintable_id    :integer
-#  complaintable_type  :string
+#  complainable_id    :integer
+#  complainable_type  :string
 #  complaint_reason_id :integer
 #  created_at          :datetime         not null
 #  updated_at          :datetime         not null
@@ -18,15 +37,21 @@ class Complaint < ApplicationRecord
 
   belongs_to :complaint_reason
   belongs_to :user
-  belongs_to :complaintable, polymorphic: true
+  belongs_to :complainable, polymorphic: true
 
-  validates_presence_of :user, :complaintable, :description, :complaint_reason
-  validates :user_id, uniqueness: { scope: [:complaintable_id, :complaintable_type] }
+  validates_presence_of :user, :complainable, :description, :complaint_reason
+  validates :user_id, uniqueness: { scope: [:complainable_id, :complainable_type] }
 
   acts_as_paranoid
   has_paper_trail
+  
+  enum state: { complained: 0, rejected: 1, accepted: 2}
 
   def reason
     complaint_reason.reason
   end
+
+  def recipient
+    complainable
+  end
 end

app/models/complaint_reason.rb

+
+# Copyright (C) 2015 Centro de Computacao Cientifica e Software Livre
+# Departamento de Informatica - Universidade Federal do Parana
+#
+# This file is part of portalmec.
+#
+# portalmec is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# portalmec is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with portalmec.  If not, see <http://www.gnu.org/licenses/>.
+
 # == Schema Information
 #
 # Table name: complaint_reasons
@@ -13,6 +32,8 @@ class ComplaintReason < ApplicationRecord
   # Only admins can create complaint reasons
   include Trackable
 
+  enum status:[:inactive, :active]
+  
   has_many :complaints
 
   validates_presence_of :reason

app/models/concerns/complainable.rb

+
+# Copyright (C) 2015 Centro de Computacao Cientifica e Software Livre
+# Departamento de Informatica - Universidade Federal do Parana
+#
+# This file is part of portalmec.
+#
+# portalmec is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# portalmec is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with portalmec.  If not, see <http://www.gnu.org/licenses/>.
+
+module Complainable
+  extend ActiveSupport::Concern
+
+  included do
+    has_many :complaints, as: :complainable
+  end
+
+  def complained?(user)
+    !complaints.where(user: user).blank?
+  end
+  
+  def treat_complaintment
+    raise NotImplementedError
+  end
+
+  def complaint_accept(params)
+    raise NotImplementedError
+  end
+
+  def complaint_reject(params)
+    raise NotImplementedError
+  end
+
+end

app/models/concerns/downloadable.rb

+
+# Copyright (C) 2015 Centro de Computacao Cientifica e Software Livre
+# Departamento de Informatica - Universidade Federal do Parana
+#
+# This file is part of portalmec.
+#
+# portalmec is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# portalmec is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with portalmec.  If not, see <http://www.gnu.org/licenses/>.
+
+module Downloadable
+  extend ActiveSupport::Concern
+
+  included do
+    has_many :downloads, as: :downloadable, dependent: :destroy
+    has_many :package_items, as: :packageable, dependent: :destroy
+    has_many :packages, through: :package_items, dependent: :destroy
+  end
+
+  def download(user, ip)
+    Download.where(user: user, ip: ip, downloadable: self).first_or_create
+  end
+
+  def downloaded?(user, ip)
+    !Download.where(user: user, ip: ip, downloadable: self).blank?
+  end
+
+  def download_link
+    raise NotImplementedError
+  end
+end

app/models/concerns/followable.rb

+
+# Copyright (C) 2015 Centro de Computacao Cientifica e Software Livre
+# Departamento de Informatica - Universidade Federal do Parana
+#
+# This file is part of portalmec.
+#
+# portalmec is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# portalmec is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with portalmec.  If not, see <http://www.gnu.org/licenses/>.
+
 module Followable
   extend ActiveSupport::Concern
 
@@ -10,11 +29,14 @@ module Followable
     Follow.where(followable: self)
   end
 
+  def followed?(user)
+    !follows.where(user: user).blank?
+  end
+
   ## get all activities from user
   # return an array of PublicActivity::Activity
   def activities
     condition = '(owner_type = :type AND owner_id = :id) OR (recipient_type = :type AND recipient_id = :id)'
-    PublicActivity::Activity.order('created_at DESC').where(condition, {type: self.class.to_s, id: self.id}).all
+    PublicActivity::Activity.order('created_at DESC').where(condition, type: self.class.to_s, id: id).all
   end
-
 end

app/models/concerns/highlights.rb

+
+# Copyright (C) 2015 Centro de Computacao Cientifica e Software Livre
+# Departamento de Informatica - Universidade Federal do Parana
+#
+# This file is part of portalmec.
+#
+# portalmec is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# portalmec is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with portalmec.  If not, see <http://www.gnu.org/licenses/>.
+
 module Highlights
   extend ActiveSupport::Concern
 
   included do
-    scope :this_week, -> (limit = 1000) { where('created_at >= ?', 1.week.ago).order(score: :desc).limit(limit) }
-    scope :this_month, -> (limit = 1000) { where('created_at >= ?', 1.month.ago).order(score: :desc).limit(limit) }
+    scope :this_week, ->(limit = 1000) { where('created_at >= ?', 1.week.ago).order(score: :desc).limit(limit) }
+    scope :this_month, ->(limit = 1000) { where('created_at >= ?', 1.month.ago).order(score: :desc).limit(limit) }
   end
-
-end
\ No newline at end of file
+end

app/models/concerns/metadatable.rb

+
+# Copyright (C) 2015 Centro de Computacao Cientifica e Software Livre
+# Departamento de Informatica - Universidade Federal do Parana
+#
+# This file is part of portalmec.
+#
+# portalmec is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# portalmec is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with portalmec.  If not, see <http://www.gnu.org/licenses/>.
+
 ## Metadatable concern for models which have metadata
 # This concern will include some methods to handle @metadata attr of application models
 module Metadatable
@@ -12,6 +31,7 @@ module Metadatable
   end
 
   def get_metadata_values_of(key)
+    return [] if metadata.blank?
     metadata[key].blank? ? [] : metadata[key]
   end
 end

app/models/concerns/publisher.rb

+
+# Copyright (C) 2015 Centro de Computacao Cientifica e Software Livre
+# Departamento de Informatica - Universidade Federal do Parana
+#
+# This file is part of portalmec.
+#
+# portalmec is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# portalmec is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with portalmec.  If not, see <http://www.gnu.org/licenses/>.
+
+module Publisher
+  extend ActiveSupport::Concern
+
+  included do
+    has_many :learning_objects, as: :publisher
+    has_many :collections, as: :owner
+  end
+
+end

app/models/concerns/reputationable.rb

+
+# Copyright (C) 2015 Centro de Computacao Cientifica e Software Livre
+# Departamento de Informatica - Universidade Federal do Parana
+#
+# This file is part of portalmec.
+#
+# portalmec is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# portalmec is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with portalmec.  If not, see <http://www.gnu.org/licenses/>.
+
 module Reputationable
   extend ActiveSupport::Concern
 
@@ -10,18 +29,20 @@ module Reputationable
   end
 
   def reviews_score_average
-    scores = learning_objects.map(&:review_ratings_average)
+    scores = []
+    learning_objects.find_each(batch_size: 1000) do |object|
+      scores << object.review_ratings_average
+    end
 
     return 0.0 if scores.empty?
 
-    scores.inject(0.0) { |a, e| a + e }.to_f / scores.size.to_f
+    scores.inject(0.0) { |acc, elem| acc + elem }.to_f / scores.size.to_f
   end
 
   def learning_objects_in_best_collections
     return 0.0 if collections.nil?
 
-    average = Collection.average(:score)
-    collections.where('score >= ?', average).count
+    collections.where('score >= ?', collections_avg_score).count
   end
 
   def learning_objects_best_score
@@ -36,7 +57,7 @@ module Reputationable
     return 0.0 if reviews.nil? || reviews.size < 5
 
     array = reviews.map(&:rates_percentage)
-    array.inject(0.0) { |a, e| a + e } / array.size
+    array.inject(0.0) { |acc, elem| acc + elem } / array.size
   end
 
   def learning_objects_recently_submitted
@@ -46,8 +67,16 @@ module Reputationable
   end
 
   def collections_score_average
-    return 0.0 if collections.nil? || collections.where(privacy: 'public').count == 0
+    return 0.0 if collections.nil? || collections.where(privacy: 'public').count.zero?
 
     collections.where(privacy: 'public').average(:score)
   end
+
+  private
+
+  def collections_avg_score
+    Rails.cache.fetch("Collection/avg_score", expires_in: 23.hours) do
+      Collection.average(:score)
+    end
+  end
 end