Refactor pet image hash loading into the Pet model, not PetType
Just a small thing, I guess when I was a kid I did a weird thing where I attached `origin_pet` to `PetType`, then upon saving `PetType` I loaded the image hash for the pet to save as the pet type's new image hash. I guess this does have the nice property of not bothering to load that stuff until we need it? But whatever, I'm moving this into `Pet` both to simplify the relationship between the models, and to prepare for another potential refactor: using `PetService.getPet` for this instead!
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2 changed files with 45 additions and 46 deletions
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@ -43,7 +43,9 @@ class Pet < ApplicationRecord
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species_id: pet_data[:species_id].to_i,
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color_id: pet_data[:color_id].to_i
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)
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self.pet_type.origin_pet = self
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new_image_hash = Pet.fetch_image_hash(self.name)
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self.pet_type.image_hash = new_image_hash if new_image_hash.present?
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# With an alt style, `body_id` in the biology data refers to the body ID of
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# the *alt* style, not the usual pet type. (We have `original_biology` for
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@ -158,6 +160,48 @@ class Pet < ApplicationRecord
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HashWithIndifferentAccess.new(envelope.messages[0].data.body)
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end
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# Given a pet's name, load its image hash, for use in `pets.neopets.com`
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# image URLs. (This corresponds to its current biology and items.)
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IMAGE_CPN_FORMAT = 'https://pets.neopets.com/cpn/%s/1/1.png';
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IMAGE_CP_LOCATION_REGEX = %r{^/cp/(.+?)/[0-9]+/[0-9]+\.png$};
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IMAGE_CPN_ACCEPTABLE_NAME = /^[A-Za-z0-9_]+$/
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def self.fetch_image_hash(name)
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return nil unless name.match?(IMAGE_CPN_ACCEPTABLE_NAME)
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cpn_uri = URI.parse sprintf(IMAGE_CPN_FORMAT, CGI.escape(name))
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begin
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res = Net::HTTP.get_response(cpn_uri, {
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'User-Agent' => Rails.configuration.user_agent_for_neopets
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})
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rescue Exception => e
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raise DownloadError, e.message
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end
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unless res.is_a? Net::HTTPFound
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begin
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res.error!
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rescue Exception => e
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Rails.logger.warn "Error loading CPN image at #{cpn_uri}: #{e.message}"
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return
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else
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Rails.logger.warn "Error loading CPN image at #{cpn_uri}. Response: #{res.inspect}"
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return
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end
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end
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new_url = res['location']
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new_image_hash = get_hash_from_cp_path(new_url)
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if new_image_hash
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Rails.logger.info "Successfully loaded #{cpn_uri}, with image hash #{new_image_hash}"
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new_image_hash
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else
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Rails.logger.warn "CPN image pointed to #{new_url}, which does not match CP image format"
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end
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end
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def self.get_hash_from_cp_path(path)
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match = path.match(IMAGE_CP_LOCATION_REGEX)
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match ? match[1] : nil
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end
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class PetNotFound < RuntimeError;end
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class DownloadError < RuntimeError;end
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class UnexpectedDataFormat < RuntimeError;end
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@ -1,8 +1,4 @@
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class PetType < ApplicationRecord
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IMAGE_CPN_FORMAT = 'https://pets.neopets.com/cpn/%s/1/1.png';
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IMAGE_CP_LOCATION_REGEX = %r{^/cp/(.+?)/[0-9]+/[0-9]+\.png$};
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IMAGE_CPN_ACCEPTABLE_NAME = /^[a-z0-9_]+$/
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# NOTE: While a pet type does always functionally belong to a color and
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# species, sometimes we don't have that record yet, in which case color_id
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# or species_id will refer to a nonexistant record, and the site should
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@ -13,8 +9,6 @@ class PetType < ApplicationRecord
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has_many :pet_states
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has_many :pets
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attr_writer :origin_pet
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BasicHashes = YAML::load_file(Rails.root.join('config', 'basic_type_hashes.yml'))
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scope :matching_name, ->(color_name, species_name) {
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@ -23,8 +17,6 @@ class PetType < ApplicationRecord
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where(color_id: color.id, species_id: species.id)
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}
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before_save :load_image_hash
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def self.special_color_or_basic(special_color)
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color_ids = special_color ? [special_color.id] : Color.basic.select([:id]).map(&:id)
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where(color_id: color_ids)
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@ -41,11 +33,6 @@ class PetType < ApplicationRecord
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random_pet_types
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end
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def self.get_hash_from_cp_path(path)
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match = path.match(IMAGE_CP_LOCATION_REGEX)
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match ? match[1] : nil
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end
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def as_json(options={})
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super({
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only: [:id],
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@ -112,38 +99,6 @@ class PetType < ApplicationRecord
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pet_state
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end
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def load_image_hash
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if @origin_pet && @origin_pet.name =~ IMAGE_CPN_ACCEPTABLE_NAME
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cpn_uri = URI.parse sprintf(IMAGE_CPN_FORMAT, CGI.escape(@origin_pet.name))
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begin
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res = Net::HTTP.get_response(cpn_uri, {
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'User-Agent' => Rails.configuration.user_agent_for_neopets
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})
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rescue Exception => e
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raise DownloadError, e.message
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end
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unless res.is_a? Net::HTTPFound
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begin
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res.error!
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rescue Exception => e
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Rails.logger.warn "Error loading CPN image at #{cpn_uri}: #{e.message}"
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return
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else
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Rails.logger.warn "Error loading CPN image at #{cpn_uri}. Response: #{res.inspect}"
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return
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end
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end
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new_url = res['location']
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new_image_hash = PetType.get_hash_from_cp_path(new_url)
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if new_image_hash
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self.image_hash = new_image_hash
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Rails.logger.info "Successfully loaded #{cpn_uri}, saved image hash #{new_image_hash}"
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else
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Rails.logger.warn "CPN image pointed to #{new_url}, which does not match CP image format"
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end
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end
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end
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def canonical_pet_state
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# For consistency (randomness is always scary!), we use the PetType ID to
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# determine which gender to prefer. That way, it'll be stable, but we'll
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