carrierwave_uploader.rb

# frozen_string_literal: true

class ImageUploader < CarrierWave::Uploader::Base
  # Include RMagick or MiniMagick support:
  # include CarrierWave::RMagick
  include CarrierWave::MiniMagick

  # Choose what kind of storage to use for this uploader:
  storage :file
  # storage :fog

  # Override the directory where uploaded files will be stored.
  # This is a sensible default for uploaders that are meant to be mounted:
  def store_dir
    "uploads/#{model.class.to_s.underscore}/#{mounted_as}/#{model.id}"
  end

  # Provide a default URL as a default if there hasn't been a file uploaded:
  # def default_url(*args)
  #   # For Rails 3.1+ asset pipeline compatibility:
  #   # ActionController::Base.helpers.asset_path("fallback/" + [version_name, "default.png"].compact.join('_'))
  #
  #   "/images/fallback/" + [version_name, "default.png"].compact.join('_')
  # end

  # Create different versions of your uploaded files:
  version :small, if: :image? do
    process resize_to_fit: [100, 100]
  end

  version :medium, if: :image? do
    process resize_to_fit: [500, 500]
  end

  version :large, if: :image? do
    process resize_to_fit: [100, 100]
  end

  # Add an allowlist of extensions which are allowed to be uploaded.
  # For images you might use something like this:
  def extension_allowlist
    %w[jpg jpeg png webp mp4 avi webm]
  end

  def content_type_allowlist
    %w[image/jpg image/jpeg image/png image/webp video/mp4 video/x-msvideo video/webm]
  end

  def size_range
    1.byte..10.megabytes
  end

  # Override the filename of the uploaded files:
  # Avoid using model.id or version_name here, see uploader/store.rb for details.
  def filename
    "#{secure_token}.#{file.extension}" if original_filename.present?
  end

  protected

  def secure_token
    var = :"@#{mounted_as}_secure_token"
    model.instance_variable_get(var) or model.instance_variable_set(var, SecureRandom.uuid)
  end

  def image?(file)
    file.content_type.start_with? 'image'
  end

  def video?(file)
    status = file.content_type.start_with? 'video'
    model.content_type = :video if status
    status
  end
end