Exporter added and rake task to generate the files

lib/events_exporter.rb

@@ -0,0 +1,65 @@
+class EventsExporter
+  FIELDS = ['title', 'description', 'scheduled', 'user_id', 'position_id', 'location', 'status',
+            'notes', 'reasons', 'published_at', 'canceled_at',
+            'organization_name', 'lobby_scheduled', 'general_remarks', 'lobby_contact_firstname',
+            'lobby_contact_lastname', 'lobby_contact_email', 'lobby_contact_phone', 'manager_general_remarks'].freeze
+
+  def headers
+    FIELDS.map { |f| I18n.t("events_exporter.#{f}") }
+  end
+
+  def event_to_row(event)
+    FIELDS.map do |f|
+      event.send(f)
+    end
+  end
+
+  def windows_headers
+    windows_array headers
+  end
+
+  def windows_event_row(event)
+    windows_array event_to_row(event)
+  end
+
+  def save_csv(path)
+    CSV.open(path, 'w', col_sep: ';', force_quotes: true, encoding: "ISO-8859-1") do |csv|
+      csv << windows_headers
+      Event.with_lobby_activity_active.find_each do |event|
+        csv << windows_event_row(event)
+      end
+    end
+  end
+
+  def save_xls(path)
+    book = Spreadsheet::Workbook.new
+    sheet = book.create_worksheet
+    sheet.row(0).default_format = Spreadsheet::Format.new color: :blue, weight: :bold
+    sheet.row(0).concat headers
+    index = 1
+    Event.with_lobby_activity_active.find_each do |event|
+      sheet.row(index).concat windows_event_row(event)
+      index += 1
+    end
+
+    book.write(path)
+  end
+
+  def save_json(path)
+    data = []
+    h = headers
+    Event.with_lobby_activity_active.find_each do |event|
+      data << h.zip(windows_event_row(event)).to_h
+    end
+    File.open(path, "w") do |f|
+      f.write(data.to_json)
+    end
+  end
+
+  private
+
+    def windows_array(values)
+      values.map { |v| v.to_s.encode("ISO-8859-1", invalid: :replace, undef: :replace, replace: '') }
+    end
+
+end

lib/tasks/export.rake

@@ -16,4 +16,18 @@ namespace :export do
     exporter.save_json(folder.join('public_organizations.json'))
   end
 
+  desc "Exports organizations' events to public/export/organizations_events.csv,
+        public/export/organizations_events.xls and public/export/organizations_events.json"
+  task events: :environment do
+    folder = Rails.root.join('public', 'export')
+    FileUtils.rm_rf folder
+    FileUtils.mkdir_p folder
+
+    exporter = EventsExporter.new
+
+    exporter.save_csv(folder.join('organizations_events.csv'))
+    exporter.save_xls(folder.join('organizations_events.xls'))
+    exporter.save_json(folder.join('organizations_events.json'))
+  end
+
 end