158 lines
4.7 KiB
Ruby
158 lines
4.7 KiB
Ruby
# frozen_string_literal: true
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# == Schema Information
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#
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# Table name: preview_cards
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#
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# id :bigint(8) not null, primary key
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# url :string default(""), not null
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# title :string default(""), not null
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# description :string default(""), not null
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# image_file_name :string
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# image_content_type :string
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# image_file_size :integer
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# image_updated_at :datetime
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# type :integer default("link"), not null
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# html :text default(""), not null
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# author_name :string default(""), not null
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# author_url :string default(""), not null
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# provider_name :string default(""), not null
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# provider_url :string default(""), not null
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# width :integer default(0), not null
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# height :integer default(0), not null
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# created_at :datetime not null
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# updated_at :datetime not null
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# embed_url :string default(""), not null
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# image_storage_schema_version :integer
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# blurhash :string
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# language :string
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# max_score :float
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# max_score_at :datetime
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# trendable :boolean
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# link_type :integer
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# published_at :datetime
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# image_description :string default(""), not null
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#
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class PreviewCard < ApplicationRecord
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include Attachmentable
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IMAGE_MIME_TYPES = ['image/jpeg', 'image/png', 'image/gif', 'image/webp'].freeze
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LIMIT = 2.megabytes
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BLURHASH_OPTIONS = {
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x_comp: 4,
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y_comp: 4,
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}.freeze
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self.inheritance_column = false
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enum type: { link: 0, photo: 1, video: 2, rich: 3 }
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enum link_type: { unknown: 0, article: 1 }
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has_many :preview_cards_statuses, dependent: :delete_all, inverse_of: :preview_card
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has_many :statuses, through: :preview_cards_statuses
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has_one :trend, class_name: 'PreviewCardTrend', inverse_of: :preview_card, dependent: :destroy
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has_attached_file :image, processors: [:thumbnail, :blurhash_transcoder], styles: ->(f) { image_styles(f) }, convert_options: { all: '-quality 90 +profile "!icc,*" +set date:modify +set date:create +set date:timestamp' }, validate_media_type: false
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validates :url, presence: true, uniqueness: true, url: true
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validates_attachment_content_type :image, content_type: IMAGE_MIME_TYPES
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validates_attachment_size :image, less_than: LIMIT
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remotable_attachment :image, LIMIT
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scope :cached, -> { where.not(image_file_name: [nil, '']) }
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before_save :extract_dimensions, if: :link?
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# This can be set by the status when retrieving the preview card using the join model
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attr_accessor :original_url
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def appropriate_for_trends?
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link? && article? && title.present? && description.present? && image.present? && provider_name.present?
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end
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def domain
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@domain ||= Addressable::URI.parse(url).normalized_host
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end
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def provider
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@provider ||= PreviewCardProvider.matching_domain(domain)
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end
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def trendable?
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if attributes['trendable'].nil?
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provider&.trendable?
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else
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attributes['trendable']
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end
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end
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def requires_review?
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attributes['trendable'].nil? && (provider.nil? || provider.requires_review?)
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end
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def requires_review_notification?
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attributes['trendable'].nil? && (provider.nil? || provider.requires_review_notification?)
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end
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def decaying?
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max_score_at && max_score_at >= Trends.links.options[:max_score_cooldown].ago && max_score_at < 1.day.ago
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end
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attr_writer :provider
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def local?
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false
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end
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def missing_image?
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width.present? && height.present? && image_file_name.blank?
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end
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def save_with_optional_image!
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save!
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rescue ActiveRecord::RecordInvalid
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self.image = nil
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save!
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end
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def history
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@history ||= Trends::History.new('links', id)
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end
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class << self
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private
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def image_styles(file)
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styles = {
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original: {
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pixels: 230_400, # 640x360px
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file_geometry_parser: FastGeometryParser,
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convert_options: '-coalesce',
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blurhash: BLURHASH_OPTIONS,
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},
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}
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styles[:original][:format] = 'jpg' if file.instance.image_content_type == 'image/gif'
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styles
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end
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end
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private
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def extract_dimensions
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file = image.queued_for_write[:original]
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return if file.nil?
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width, height = FastImage.size(file.path)
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return nil if width.nil?
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self.width = width
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self.height = height
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end
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end
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