transferred Code Ocean from original repository to GitHub

app/models/code_ocean/file.rb

@@ -0,0 +1,84 @@
+require File.expand_path('../../../uploaders/file_uploader', __FILE__)
+
+module CodeOcean
+  class File < ActiveRecord::Base
+    DEFAULT_WEIGHT = 1.0
+    ROLES = %w[main_file reference_implementation regular_file teacher_defined_test user_defined_file user_defined_test]
+    TEACHER_DEFINED_ROLES = ROLES - %w[user_defined_file]
+
+    after_initialize :set_default_values
+    before_validation :set_ancestor_values, if: :incomplete_descendent?
+    before_validation :hash_content, if: :content_present?
+
+    belongs_to :context, polymorphic: true
+    belongs_to :execution_environment
+    belongs_to :file
+    alias_method :ancestor, :file
+    belongs_to :file_type
+
+    has_many :files
+    alias_method :descendants, :files
+
+    mount_uploader :native_file, FileUploader
+
+    scope :editable, -> { where(read_only: false) }
+    scope :visible, -> { where(hidden: false) }
+
+    validates :feedback_message, if: :teacher_defined_test?, presence: true
+    validates :feedback_message, absence: true, unless: :teacher_defined_test?
+    validates :file_type_id, presence: true
+    validates :hashed_content, if: :content_present?, presence: true
+    validates :hidden, inclusion: {in: [true, false]}
+    validates :name, presence: true
+    validates :read_only, inclusion: {in: [true, false]}
+    validates :role, inclusion: {in: ROLES}
+    validates :weight, if: :teacher_defined_test?, numericality: true, presence: true
+    validates :weight, absence: true, unless: :teacher_defined_test?
+
+    ROLES.each do |role|
+      define_method("#{role}?") { self.role == role }
+    end
+
+    def ancestor_id
+      file_id || id
+    end
+
+    def content_present?
+      content? || native_file?
+    end
+    private :content_present?
+
+    def hash_content
+      self.hashed_content = Digest::MD5.new.hexdigest(file_type.binary? ? ::File.new(native_file.file.path, 'r').read : content)
+    end
+    private :hash_content
+
+    def incomplete_descendent?
+      file_id.present? && file_type_id.blank?
+    end
+    private :incomplete_descendent?
+
+    def name_with_extension
+      name + (file_type.file_extension || '')
+    end
+
+    def set_ancestor_values
+      [:feedback_message, :file_type_id, :hidden, :name, :path, :read_only, :role, :weight].each do |attribute|
+        send(:"#{attribute}=", ancestor.send(attribute))
+      end
+    end
+    private :set_ancestor_values
+
+    def set_default_values
+      self.content ||= ''
+      self.hidden ||= false
+      self.read_only ||= false
+      self.weight ||= DEFAULT_WEIGHT if teacher_defined_test?
+    end
+    private :set_default_values
+
+    def visible
+      !hidden
+    end
+  end
+end