Use file_validators instead of Papeclip validations

Since we're going to remove Paperclip and Active Storage doesn't provide
any validations, we have to either write our own validation rules or use
a different gem.

We're using the file_validators gem instead of the
`active_storage_validations` gem because the latter doesn't support
proc/lambda objects in size and content type definitions. We need to use
them because in our case these values depend on settings stored in the
database.

Gemfile

@@ -19,6 +19,7 @@ gem "dalli", "~> 2.7.11"
 gem "delayed_job_active_record", "~> 4.1.6"
 gem "devise", "~> 4.8.0"
 gem "devise-security", "~> 0.16.0"
+gem "file_validators", "~> 3.0.0"
 gem "font-awesome-sass", "~> 5.15.1" # Remember to update vendor/assets/images/fontawesome when updating this gem
 gem "foundation-rails", "~> 6.6.2.0"
 gem "foundation_rails_helper", "~> 4.0.0"

Gemfile.lock

@@ -250,6 +250,9 @@ GEM
     faraday-patron (1.0.0)
     faraday-rack (1.0.0)
     ffi (1.15.4)
+    file_validators (3.0.0)
+      activemodel (>= 3.2)
+      mime-types (>= 1.0)
     font-awesome-sass (5.15.1)
       sassc (>= 1.11)
     foundation-rails (6.6.2.0)
@@ -723,6 +726,7 @@ DEPENDENCIES
   erb_lint (~> 0.0.37)
   factory_bot_rails (~> 6.2.0)
   faker (~> 2.18.0)
+  file_validators (~> 3.0.0)
   font-awesome-sass (~> 5.15.1)
   foundation-rails (~> 6.6.2.0)
   foundation_rails_helper (~> 4.0.0)

app/models/ckeditor/picture.rb

@@ -6,11 +6,19 @@ class Ckeditor::Picture < Ckeditor::Asset
                  path: ":rails_root/public/ckeditor_assets/pictures/:id/:style_:basename.:extension",
                  styles: { content: "800>", thumb: "118x100#" }
 
-  validates_attachment_presence :data
-  validates_attachment_size :data, less_than: 2.megabytes
-  validates_attachment_content_type :data, content_type: /\Aimage/
+  do_not_validate_attachment_file_type :data
+  validate :attachment_presence
+  validates :data, file_content_type: { allow: /^image\/.*/ }, file_size: { less_than: 2.megabytes }
 
   def url_content
     url(:content)
   end
+
+  private
+
+    def attachment_presence
+      unless data.present?
+        errors.add(:data, I18n.t("errors.messages.blank"))
+      end
+    end
 end

app/models/site_customization/image.rb

@@ -14,7 +14,9 @@ class SiteCustomization::Image < ApplicationRecord
   has_attachment :image
 
   validates :name, presence: true, uniqueness: true, inclusion: { in: VALID_IMAGES.keys }
-  validates_attachment_content_type :image, content_type: ["image/png", "image/jpeg"]
+  do_not_validate_attachment_file_type :image
+  validates :image, file_content_type: { allow: ["image/png", "image/jpeg"] }
+
   validate :check_image
 
   def self.all_images

config/i18n-tasks.yml

@@ -169,6 +169,7 @@ ignore_unused:
   - "admin.dashboard.administrator_tasks.index.filter*"
   - "admin.dashboard.actions.index.default.*"
   - "admin.users.index.filter*"
+  - "errors.messages.allowed_file_content_types"
   - "moderation.comments.index.filter*"
   - "moderation.comments.index.orders.*"
   - "moderation.debates.index.filter*"

config/locales/en/general.yml

@@ -150,6 +150,7 @@ en:
         submit_button: Save changes
   errors:
     messages:
+      allowed_file_content_types: "content type must be one of %{types}"
       user_not_found: User not found
       invalid_date_range: "Invalid date range"
   form:

config/locales/es/general.yml

@@ -150,6 +150,7 @@ es:
         submit_button: Guardar cambios
   errors:
     messages:
+      allowed_file_content_types: "el tipo de contenido debe ser uno de los siguientes: %{types}"
       user_not_found: Usuario no encontrado
       invalid_date_range: "El rango de fechas no es válido"
   form: