86 lines
2.9 KiB
Ruby
86 lines
2.9 KiB
Ruby
# This model handles a user (subscriber) subscribing to another user (author).
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# We also record the source of the subscription (Article, Comment, etc.) via a
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# polymorphic association (user_subscription_source/able).
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class UserSubscription < ApplicationRecord
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ALLOWED_TYPES = %w[Article].freeze
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counter_culture :subscriber, column_name: "subscribed_to_user_subscriptions_count"
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counter_culture :user_subscription_sourceable, column_name: "user_subscriptions_count"
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belongs_to :author, class_name: "User", inverse_of: :source_authored_user_subscriptions
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belongs_to :subscriber, class_name: "User", inverse_of: :subscribed_to_user_subscriptions
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belongs_to :user_subscription_sourceable, polymorphic: true
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validates :author_id, presence: true
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validates :subscriber_email, presence: true
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validates :subscriber_id, presence: true, uniqueness: { scope: %i[subscriber_email user_subscription_sourceable_type
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user_subscription_sourceable_id] }
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validates :user_subscription_sourceable_id, presence: true
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validates :user_subscription_sourceable_type, presence: true, inclusion: { in: ALLOWED_TYPES }
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validate :tag_enabled
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validate :non_apple_auth_subscriber
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validate :active_user_subscription_source
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def self.build(source:, subscriber:)
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new(build_attributes(source, subscriber))
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end
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def self.make(source:, subscriber:)
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create(build_attributes(source, subscriber))
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end
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def self.build_attributes(source, subscriber)
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{
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user_subscription_sourceable: source,
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author_id: source&.user_id,
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subscriber_id: subscriber&.id,
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subscriber_email: subscriber&.email
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}
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end
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private
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def tag_enabled
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return unless user_subscription_sourceable
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return if liquid_tags_used.include?(UserSubscriptionTag)
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errors.add(:base, "User subscriptions are not enabled for the source.")
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end
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def liquid_tags_used
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MarkdownParser.new(
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user_subscription_sourceable.body_markdown,
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source: user_subscription_sourceable,
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user: user_subscription_sourceable.user,
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).tags_used
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rescue StandardError # Can occur during parsing for improper tags or bad args
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[]
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end
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def non_apple_auth_subscriber
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return unless subscriber_email&.end_with?("@privaterelay.appleid.com")
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errors.add(:subscriber_email, "Can't subscribe with an Apple private relay. Please update email.")
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end
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def active_user_subscription_source
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return unless user_subscription_sourceable
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source_active =
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# Don't create new user subscriptions for inactive sources
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# (i.e. unpublished Articles, deleted Comments, etc.)
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case user_subscription_sourceable_type
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when "Article"
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user_subscription_sourceable.published?
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when "Comment"
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!user_subscription_sourceable.deleted?
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else
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false
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end
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return if source_active
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errors.add(:base, "Source not found.")
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end
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end
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