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podcast_container.rb
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podcast_container.rb
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# frozen_string_literal: true
module Apple
class PodcastContainer < ApplicationRecord
include Apple::ApiResponse
serialize :api_response, JSON
default_scope { includes(:apple_sync_log) }
has_one :apple_sync_log, -> { podcast_containers }, foreign_key: :feeder_id, class_name: "SyncLog", dependent: :destroy
has_many :podcast_deliveries, dependent: :destroy
has_many :podcast_delivery_files, through: :podcast_deliveries
belongs_to :episode, -> { with_deleted }, class_name: "::Episode"
alias_attribute :deliveries, :podcast_deliveries
alias_attribute :delivery_files, :podcast_delivery_files
FILE_STATUS_SUCCESS = "In Asset Repository"
FILE_ASSET_ROLE_PODCAST_AUDIO = "PodcastSourceAudio"
SOURCE_URL_EXP_BUFFER = 10.minutes
def self.reset_source_file_metadata(episodes)
episodes = episodes.select { |ep| ep.podcast_container.present? }
episodes = episodes.select { |ep| ep.needs_delivery? }
episodes.map do |episode|
container = episode.container
Rails.logger.info("Resetting source url for podcast container",
podcast_container_id: container.id,
source_size: container.source_size,
source_url: container.source_url)
# Back to DTR to pick up fresh arrangements:
container.reset_source_metadata!(episode)
end.compact
end
def self.probe_source_file_metadata(api, episodes)
containers = episodes.map(&:podcast_container)
raise "Missing podcast container for episode" if containers.any?(&:nil?)
containers = containers.filter(&:needs_file_metadata?)
containers_by_id = containers.map { |c| [c.id, c] }.to_h
api.bridge_remote_and_retry!("headFileSizes", containers.map(&:head_file_size_bridge_params))
.map do |row|
content_length = row.dig("api_response", "val", "data", "headers", "content-length")
cdn_url = row.dig("api_response", "val", "data", "redirect_chain_end_url")
raise "Missing content-length in response" if content_length.blank?
raise "Missing cdn_url in response" if cdn_url.blank?
podcast_container_id = row["request_metadata"]["podcast_container_id"]
container = containers_by_id.fetch(podcast_container_id)
container.source_size = content_length
container.source_url = cdn_url
container.save!
container
end
end
def self.poll_podcast_container_state(api, episodes)
results = get_podcast_containers_via_episodes(api, episodes)
join_on_apple_episode_id(episodes, results, left_join: true).each do |(ep, row)|
next if row.nil?
apple_id = row.dig("api_response", "val", "data", "id")
raise "missing apple id!" unless apple_id.present?
upsert_podcast_container(ep, row)
end
end
def self.create_podcast_containers(api, episodes)
# There is a 1:1 relationship between episodes and podcast containers w/
# key contraints on the episodes vendorId -- and you cannot destroy a
# podcast container.
# We should have a local record of the podcast container, per the poll
# method above.
episodes_to_create = episodes.reject { |ep| ep.has_container? }
new_containers_response =
api.bridge_remote_and_retry!("createPodcastContainers",
create_podcast_containers_bridge_params(api, episodes_to_create), batch_size: Api::DEFAULT_WRITE_BATCH_SIZE)
join_on_apple_episode_id(episodes_to_create, new_containers_response).each do |ep, row|
upsert_podcast_container(ep, row)
end
episodes_to_create
end
def self.upsert_podcast_container(episode, row)
external_id = row.dig("api_response", "val", "data", "id")
raise "Missing external_id in response" if external_id.blank?
(pc, action) =
if (pc = where(apple_episode_id: episode.apple_id,
external_id: external_id,
episode_id: episode.feeder_id,
vendor_id: episode.audio_asset_vendor_id).first)
pc.touch
[pc, :updated]
else
pc = create!(apple_episode_id: episode.apple_id,
external_id: external_id,
vendor_id: episode.audio_asset_vendor_id,
episode_id: episode.feeder_id)
[pc, :created]
end
Rails.logger.info("#{action} local podcast container",
{podcast_container_id: pc.id,
action: action,
external_id: external_id,
feeder_episode_id: episode.feeder_id})
SyncLog.log!(feeder_id: pc.id, feeder_type: :podcast_containers, external_id: external_id, api_response: row)
# reset the episode's podcast container cached value
pc.reload if action == :updated
episode.feeder_episode.reload
pc
end
def self.get_podcast_containers_via_episodes(api, episodes)
# Fetch the podcast containers from the episodes side of the API
response =
api.bridge_remote_and_retry!("getPodcastContainers", get_podcast_containers_bridge_params(api, episodes), batch_size: 1)
# Rather than mangling and persisting the enumerated view of the containers in the episodes,
# just re-fetch the podcast containers from the non-list podcast container endpoint
formatted_bridge_params =
join_on_apple_episode_id(episodes, response).map do |(episode, row)|
get_urls_for_episode_podcast_containers(api, row).map do |url|
get_podcast_containers_bridge_param(episode.apple_id, url)
end
end
formatted_bridge_params = formatted_bridge_params.flatten
api.bridge_remote_and_retry!("getPodcastContainers", formatted_bridge_params, batch_size: 2)
end
def self.get_urls_for_episode_podcast_containers(api, episode_podcast_containers_json)
containers_json = episode_podcast_containers_json["api_response"]["val"]["data"]
raise "Unsupported number of podcast containers for episode: #{ep.feeder_id}" if containers_json.length > 1
containers_json.map do |podcast_container_json|
api.join_url("podcastContainers/#{podcast_container_json["id"]}").to_s
end
end
def self.get_podcast_containers_bridge_params(api, episodes)
episodes.map do |ep|
get_podcast_containers_bridge_param(ep.apple_id, podcast_container_url(api, ep))
end
end
def self.get_podcast_containers_bridge_param(apple_episode_id, api_url)
{
request_metadata: {apple_episode_id: apple_episode_id},
api_url: api_url,
api_parameters: {}
}
end
def self.create_podcast_containers_bridge_params(api, episodes)
episodes
.map do |ep|
{
request_metadata: {apple_episode_id: ep.apple_id},
api_url: api.join_url("podcastContainers").to_s,
api_parameters: podcast_container_create_parameters(ep)
}
end
end
def self.podcast_container_create_parameters(episode)
{
data: {
type: "podcastContainers",
attributes: {
vendorId: episode.audio_asset_vendor_id
}
}
}
end
def self.podcast_containers_parameters(episode)
{
data: {
type: "podcastContainers",
attributes: {
vendorId: episode.audio_asset_vendor_id,
id: episode.podcast_container.external_id
}
}
}
end
def self.podcast_container_url(api, episode)
raise "Missing episode audio vendor id" unless episode.audio_asset_vendor_id.present?
api.join_url("podcastContainers?filter[vendorId]=#{episode.audio_asset_vendor_id}").to_s
end
def head_file_size_bridge_params
{
request_metadata: {
apple_episode_id: apple_episode_id,
podcast_container_id: id
},
api_url: source_url || enclosure_url,
api_parameters: {}
}
end
def podcast_deliveries_url
apple_data.dig("relationships", "podcastDeliveries", "links", "related")
end
def podcast_container_id
id
end
def files
apple_attributes.dig("files")
end
def has_podcast_audio?
return false if files.empty?
files.all? do |file|
# Retrieve the file status from the podcast container's files attribute
file["status"] == FILE_STATUS_SUCCESS && file["assetRole"] == FILE_ASSET_ROLE_PODCAST_AUDIO
end
end
def missing_podcast_audio?
!has_podcast_audio?
end
def delivered?
# because we cannot infer if the podcast delivery files have expired
return true if podcast_delivery_files.length == 0
(podcast_delivery_files.all?(&:delivered?) &&
podcast_delivery_files.all?(&:processed?))
end
def processed_errors?
return false if podcast_delivery_files.length == 0
podcast_delivery_files.all?(&:processed_errors?)
end
def delivery_settled?
delivered? && !processed_errors?
end
def container_upload_satisfied?
# Sets us up for a retry if something prevented the audio from being
# marked as uploaded and then processed and validated. Assuming that we
# get to that point and the audio is still missing, we should be able to
# retry.
has_podcast_audio?
end
def skip_delivery?
container_upload_satisfied?
end
def needs_delivery?
!skip_delivery?
end
def filename_prefix(ct)
ct.zero? ? "" : "#{ct}_"
end
def reset_source_metadata!(apple_ep)
count = source_fetch_count + 1
update!(
source_fetch_count: count,
source_url: nil,
source_size: nil,
source_filename: filename_prefix(count) + apple_ep.enclosure_filename,
enclosure_url: apple_ep.enclosure_url
)
end
def needs_file_metadata?
source_url.nil? || source_size.nil? || source_filename.nil?
end
end
end