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# frozen_string_literal: true
class ActivityPub::FetchFeaturedTagsCollectionService < BaseService
include JsonLdHelper
def call(account, url)
return if url.blank? || account.suspended? || account.local?
@account = account
@json = fetch_resource(url, true, local_follower)
return unless supported_context?(@json)
process_items(collection_items(@json))
end
private
def collection_items(collection)
all_items = []
collection = fetch_collection(collection['first']) if collection['first'].present?
while collection.is_a?(Hash)
items = case collection['type']
when 'Collection', 'CollectionPage'
collection['items']
when 'OrderedCollection', 'OrderedCollectionPage'
collection['orderedItems']
end
break if items.blank?
all_items.concat(items)
break if all_items.size >= FeaturedTag::LIMIT
collection = collection['next'].present? ? fetch_collection(collection['next']) : nil
end
all_items
end
def fetch_collection(collection_or_uri)
return collection_or_uri if collection_or_uri.is_a?(Hash)
return if invalid_origin?(collection_or_uri)
fetch_resource_without_id_validation(collection_or_uri, local_follower, true)
end
def process_items(items)
names = items.filter_map { |item| item['type'] == 'Hashtag' && item['name']&.delete_prefix('#') }.take(FeaturedTag::LIMIT)
tags = names.index_by { |name| HashtagNormalizer.new.normalize(name) }
normalized_names = tags.keys
FeaturedTag.includes(:tag).references(:tag).where(account: @account).where.not(tag: { name: normalized_names }).delete_all
FeaturedTag.includes(:tag).references(:tag).where(account: @account, tag: { name: normalized_names }).each do |featured_tag|
featured_tag.update(name: tags.delete(featured_tag.tag.name))
end
tags.each_value do |name|
FeaturedTag.create!(account: @account, name: name)
end
end
def local_follower
return @local_follower if defined?(@local_follower)
@local_follower = @account.followers.local.without_suspended.first
end
end
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