preview_card.rb 2.4 KB

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  1. # frozen_string_literal: true
  2. # == Schema Information
  3. #
  4. # Table name: preview_cards
  5. #
  6. # id :bigint(8) not null, primary key
  7. # url :string default(""), not null
  8. # title :string default(""), not null
  9. # description :string default(""), not null
  10. # image_file_name :string
  11. # image_content_type :string
  12. # image_file_size :integer
  13. # image_updated_at :datetime
  14. # type :integer default("link"), not null
  15. # html :text default(""), not null
  16. # author_name :string default(""), not null
  17. # author_url :string default(""), not null
  18. # provider_name :string default(""), not null
  19. # provider_url :string default(""), not null
  20. # width :integer default(0), not null
  21. # height :integer default(0), not null
  22. # created_at :datetime not null
  23. # updated_at :datetime not null
  24. # embed_url :string default(""), not null
  25. #
  26. class PreviewCard < ApplicationRecord
  27. IMAGE_MIME_TYPES = ['image/jpeg', 'image/png', 'image/gif', 'image/webp'].freeze
  28. LIMIT = 1.megabytes
  29. self.inheritance_column = false
  30. enum type: [:link, :photo, :video, :rich]
  31. has_and_belongs_to_many :statuses
  32. has_attached_file :image, styles: ->(f) { image_styles(f) }, convert_options: { all: '-quality 80 -strip' }
  33. include Attachmentable
  34. validates :url, presence: true, uniqueness: true
  35. validates_attachment_content_type :image, content_type: IMAGE_MIME_TYPES
  36. validates_attachment_size :image, less_than: LIMIT
  37. remotable_attachment :image, LIMIT
  38. before_save :extract_dimensions, if: :link?
  39. def save_with_optional_image!
  40. save!
  41. rescue ActiveRecord::RecordInvalid
  42. self.image = nil
  43. save!
  44. end
  45. class << self
  46. private
  47. def image_styles(f)
  48. styles = {
  49. original: {
  50. geometry: '400x400>',
  51. file_geometry_parser: FastGeometryParser,
  52. convert_options: '-coalesce -strip',
  53. },
  54. }
  55. styles[:original][:format] = 'jpg' if f.instance.image_content_type == 'image/gif'
  56. styles
  57. end
  58. end
  59. private
  60. def extract_dimensions
  61. file = image.queued_for_write[:original]
  62. return if file.nil?
  63. width, height = FastImage.size(file.path)
  64. return nil if width.nil?
  65. self.width = width
  66. self.height = height
  67. end
  68. end