add entry requests, invite new users

app/models/entry.rb

@@ -1,15 +1,21 @@
 class Entry < ApplicationRecord
   belongs_to :created_by, class_name: "User", optional: true
   belongs_to :updated_by, class_name: "User", optional: true
+  belongs_to :requested_by, class_name: "User", optional: true
 
   has_many :suggested_meanings, dependent: :destroy
   has_many :comments, as: :commentable, dependent: :destroy
 
   enum :category, %i[word phrase proper_name title reference other]
+  enum :status, %i[requested approved active], default: :active
 
   validates :category, presence: true
+  validate :at_least_one_translation
 
   scope :with_category, ->(cat) { cat.present? ? where(category: cat) : all }
+  scope :requested, -> { where(status: :requested) }
+  scope :approved, -> { where(status: :approved) }
+  scope :active_entries, -> { where(status: :active) }
 
   def self.search(query, language_code: nil)
     return all if query.blank?
@@ -43,4 +49,10 @@ class Entry < ApplicationRecord
   def self.valid_lang?(code)
     SupportedLanguage.valid_codes.include?(code.to_s)
   end
+
+  def at_least_one_translation
+    if [fi, en, sv, no, ru, de].all?(&:blank?)
+      errors.add(:base, "At least one language translation is required")
+    end
+  end
 end