Basic proposition creation mailer

app/mailers/proposition_mailer.rb

@@ -0,0 +1,7 @@
+# coding: utf-8
+class PropositionMailer < ActionMailer::Base
+  def new_proposition_notification(proposition)
+    @proposition = proposition
+    mail(to: proposition.proposable.conference.email, subject: "Ново предложение за #{@proposition.proposable_type}: #{@proposition.proposable_title}")
+  end
+end

app/models/concerns/proposable.rb

@@ -4,9 +4,25 @@ module Proposable
   included do
     has_one :proposition, as: :proposable
     has_one :proposer, through: :proposition
+    delegate :email, to: :proposer, prefix: true
 
     Proposition.defined_enums["status"].keys.each do |status|
       scope status.to_sym, -> { joins(:proposition).where(propositions: {status: Proposition.defined_enums["status"][status]}) }
     end
   end
+
+  def proposable_type
+    self.class.model_name.human
+  end
+
+  def notification_email
+    conference.email
+  end
+
+  def proposable_title
+    title
+  end
+
+  def proposable_description
+  end
 end

app/models/event.rb

@@ -33,6 +33,24 @@ class Event < ActiveRecord::Base
     read_attribute(:length) || event_type.try(:minimum_length)
   end
 
+  def proposable_type
+    event_type.name
+  end
+
+  def proposable_description
+    {
+      proposer_email: proposer_email,
+      title: title,
+      subtitle: subtitle,
+      track: track.name,
+      length: "#{length} m",
+      language: language,
+      abstract: abstract,
+      description: description,
+      notes: notes
+    }
+  end
+
   private
 
   def track_belongs_to_the_selected_conference

app/models/proposition.rb

@@ -3,4 +3,10 @@ class Proposition < ActiveRecord::Base
   belongs_to :proposable, polymorphic: true
 
   enum status: [:undecided, :approved, :rejected, :backup]
+
+  delegate :proposable_title, :proposable_type, :proposable_description, to: :proposable
+
+  def send_creation_notification
+    PropositionMailer.new_proposition_notification(self).deliver_later
+  end
 end

app/views/proposition_mailer/new_proposition_notification.text.erb

@@ -0,0 +1,8 @@
+Здравейте,
+
+Беше получено следното предложение за <%= @proposition.proposable_type %>:
+
+<% @proposition.proposable_description.each do |key, value| %>
+<%= @proposition.proposable.class.human_attribute_name(key) %>: <%= value %>
+
+<% end %>

app/views/proposition_mailer/new_proposition_notification.text.slim

@@ -0,0 +1,3 @@
+PropositionMailer#new_proposition_notification
+
+= @greeting + ", find me in app/views/proposition_mailer/new_proposition_notification.text.slim"