app/models/media_attachment.rb

   1 # frozen_string_literal: true
   2 # == Schema Information
   3 #
   4 # Table name: media_attachments
   5 #
   6 #  id                  :bigint(8)        not null, primary key
   7 #  status_id           :bigint(8)
   8 #  file_file_name      :string
   9 #  file_content_type   :string
  10 #  file_file_size      :integer
  11 #  file_updated_at     :datetime
  12 #  remote_url          :string           default(""), not null
  13 #  created_at          :datetime         not null
  14 #  updated_at          :datetime         not null
  15 #  shortcode           :string
  16 #  type                :integer          default("image"), not null
  17 #  file_meta           :json
  18 #  account_id          :bigint(8)
  19 #  description         :text
  20 #  scheduled_status_id :bigint(8)
  21 #  blurhash            :string
  22 #
  23
  24 class MediaAttachment < ApplicationRecord
  25   self.inheritance_column = nil
  26
  27   enum type: [:image, :gifv, :video, :unknown, :audio]
  28
  29   IMAGE_FILE_EXTENSIONS = %w(.jpg .jpeg .png .gif).freeze
  30   VIDEO_FILE_EXTENSIONS = %w(.webm .mp4 .m4v .mov).freeze
  31   AUDIO_FILE_EXTENSIONS = %w(.ogg .oga .mp3 .wav .flac .opus .aac .m4a .3gp .wma).freeze
  32
  33   IMAGE_MIME_TYPES             = %w(image/jpeg image/png image/gif).freeze
  34   VIDEO_MIME_TYPES             = %w(video/webm video/mp4 video/quicktime video/ogg).freeze
  35   VIDEO_CONVERTIBLE_MIME_TYPES = %w(video/webm video/quicktime).freeze
  36   AUDIO_MIME_TYPES             = %w(audio/wave audio/wav audio/x-wav audio/x-pn-wave audio/ogg audio/mpeg audio/mp3 audio/webm audio/flac audio/aac audio/m4a audio/x-m4a audio/mp4 audio/3gpp video/x-ms-asf).freeze
  37
  38   BLURHASH_OPTIONS = {
  39     x_comp: 4,
  40     y_comp: 4,
  41   }.freeze
  42
  43   IMAGE_STYLES = {
  44     original: {
  45       pixels: 1_638_400, # 1280x1280px
  46       file_geometry_parser: FastGeometryParser,
  47     },
  48
  49     small: {
  50       pixels: 160_000, # 400x400px
  51       file_geometry_parser: FastGeometryParser,
  52       blurhash: BLURHASH_OPTIONS,
  53     },
  54   }.freeze
  55
  56   VIDEO_STYLES = {
  57     small: {
  58       convert_options: {
  59         output: {
  60           vf: 'scale=\'min(400\, iw):min(400\, ih)\':force_original_aspect_ratio=decrease',
  61         },
  62       },
  63       format: 'png',
  64       time: 0,
  65       file_geometry_parser: FastGeometryParser,
  66       blurhash: BLURHASH_OPTIONS,
  67     },
  68
  69     original: {
  70       keep_same_format: true,
  71       convert_options: {
  72         output: {
  73           'map_metadata' => '-1',
  74           'c:v' => 'copy',
  75           'c:a' => 'copy',
  76         },
  77       },
  78     },
  79   }.freeze
  80
  81   AUDIO_STYLES = {
  82     original: {
  83       format: 'mp3',
  84       content_type: 'audio/mpeg',
  85       convert_options: {
  86         output: {
  87           'q:a' => 2,
  88         },
  89       },
  90     },
  91   }.freeze
  92
  93   VIDEO_FORMAT = {
  94     format: 'mp4',
  95     content_type: 'video/mp4',
  96     convert_options: {
  97       output: {
  98         'loglevel' => 'fatal',
  99         'movflags' => 'faststart',
 100         'pix_fmt' => 'yuv420p',
 101         'vf' => 'scale=\'trunc(iw/2)*2:trunc(ih/2)*2\'',
 102         'vsync' => 'cfr',
 103         'c:v' => 'h264',
 104         'maxrate' => '1300K',
 105         'bufsize' => '1300K',
 106         'frames:v' => 60 * 60 * 3,
 107         'crf' => 18,
 108         'map_metadata' => '-1',
 109       },
 110     },
 111   }.freeze
 112
 113   VIDEO_CONVERTED_STYLES = {
 114     small: VIDEO_STYLES[:small],
 115     original: VIDEO_FORMAT,
 116   }.freeze
 117
 118   IMAGE_LIMIT = 10.megabytes
 119   VIDEO_LIMIT = 40.megabytes
 120
 121   belongs_to :account,          inverse_of: :media_attachments, optional: true
 122   belongs_to :status,           inverse_of: :media_attachments, optional: true
 123   belongs_to :scheduled_status, inverse_of: :media_attachments, optional: true
 124
 125   has_attached_file :file,
 126                     styles: ->(f) { file_styles f },
 127                     processors: ->(f) { file_processors f },
 128                     convert_options: { all: '-quality 90 -strip +set modify-date +set create-date' }
 129
 130   validates_attachment_content_type :file, content_type: IMAGE_MIME_TYPES + VIDEO_MIME_TYPES + AUDIO_MIME_TYPES
 131   validates_attachment_size :file, less_than: IMAGE_LIMIT, unless: :larger_media_format?
 132   validates_attachment_size :file, less_than: VIDEO_LIMIT, if: :larger_media_format?
 133   remotable_attachment :file, VIDEO_LIMIT, suppress_errors: false
 134
 135   include Attachmentable
 136
 137   validates :account, presence: true
 138   validates :description, length: { maximum: 1_500 }, if: :local?
 139
 140   scope :attached,   -> { where.not(status_id: nil).or(where.not(scheduled_status_id: nil)) }
 141   scope :unattached, -> { where(status_id: nil, scheduled_status_id: nil) }
 142   scope :local,      -> { where(remote_url: '') }
 143   scope :remote,     -> { where.not(remote_url: '') }
 144   scope :cached,     -> { remote.where.not(file_file_name: nil) }
 145
 146   default_scope { order(id: :asc) }
 147
 148   def local?
 149     remote_url.blank?
 150   end
 151
 152   def needs_redownload?
 153     file.blank? && remote_url.present?
 154   end
 155
 156   def larger_media_format?
 157     video? || gifv? || audio?
 158   end
 159
 160   def audio_or_video?
 161     audio? || video?
 162   end
 163
 164   def to_param
 165     shortcode
 166   end
 167
 168   def focus=(point)
 169     return if point.blank?
 170
 171     x, y = (point.is_a?(Enumerable) ? point : point.split(',')).map(&:to_f)
 172
 173     meta = file.instance_read(:meta) || {}
 174     meta['focus'] = { 'x' => x, 'y' => y }
 175
 176     file.instance_write(:meta, meta)
 177   end
 178
 179   def focus
 180     x = file.meta['focus']['x']
 181     y = file.meta['focus']['y']
 182
 183     "#{x},#{y}"
 184   end
 185
 186   after_commit :reset_parent_cache, on: :update
 187   before_create :prepare_description, unless: :local?
 188   before_create :set_shortcode
 189   before_post_process :set_type_and_extension
 190   before_save :set_meta
 191
 192   class << self
 193     def supported_mime_types
 194       IMAGE_MIME_TYPES + VIDEO_MIME_TYPES + AUDIO_MIME_TYPES
 195     end
 196
 197     def supported_file_extensions
 198       IMAGE_FILE_EXTENSIONS + VIDEO_FILE_EXTENSIONS + AUDIO_FILE_EXTENSIONS
 199     end
 200
 201     private
 202
 203     def file_styles(f)
 204       if f.instance.file_content_type == 'image/gif' || VIDEO_CONVERTIBLE_MIME_TYPES.include?(f.instance.file_content_type)
 205         VIDEO_CONVERTED_STYLES
 206       elsif IMAGE_MIME_TYPES.include?(f.instance.file_content_type)
 207         IMAGE_STYLES
 208       elsif VIDEO_MIME_TYPES.include?(f.instance.file_content_type)
 209         VIDEO_STYLES
 210       else
 211         AUDIO_STYLES
 212       end
 213     end
 214
 215     def file_processors(f)
 216       if f.file_content_type == 'image/gif'
 217         [:gif_transcoder, :blurhash_transcoder]
 218       elsif VIDEO_MIME_TYPES.include?(f.file_content_type)
 219         [:video_transcoder, :blurhash_transcoder, :type_corrector]
 220       elsif AUDIO_MIME_TYPES.include?(f.file_content_type)
 221         [:transcoder, :type_corrector]
 222       else
 223         [:lazy_thumbnail, :blurhash_transcoder, :type_corrector]
 224       end
 225     end
 226   end
 227
 228   private
 229
 230   def set_shortcode
 231     self.type = :unknown if file.blank? && !type_changed?
 232
 233     return unless local?
 234
 235     loop do
 236       self.shortcode = SecureRandom.urlsafe_base64(14)
 237       break if MediaAttachment.find_by(shortcode: shortcode).nil?
 238     end
 239   end
 240
 241   def prepare_description
 242     self.description = description.strip[0...420] unless description.nil?
 243   end
 244
 245   def set_type_and_extension
 246     self.type = begin
 247       if VIDEO_MIME_TYPES.include?(file_content_type)
 248         :video
 249       elsif AUDIO_MIME_TYPES.include?(file_content_type)
 250         :audio
 251       else
 252         :image
 253       end
 254     end
 255   end
 256
 257   def set_meta
 258     meta = populate_meta
 259
 260     return if meta == {}
 261
 262     file.instance_write :meta, meta
 263   end
 264
 265   def populate_meta
 266     meta = file.instance_read(:meta) || {}
 267
 268     file.queued_for_write.each do |style, file|
 269       meta[style] = style == :small || image? ? image_geometry(file) : video_metadata(file)
 270     end
 271
 272     meta
 273   end
 274
 275   def image_geometry(file)
 276     width, height = FastImage.size(file.path)
 277
 278     return {} if width.nil?
 279
 280     {
 281       width:  width,
 282       height: height,
 283       size: "#{width}x#{height}",
 284       aspect: width.to_f / height.to_f,
 285     }
 286   end
 287
 288   def video_metadata(file)
 289     movie = FFMPEG::Movie.new(file.path)
 290
 291     return {} unless movie.valid?
 292
 293     {
 294       width: movie.width,
 295       height: movie.height,
 296       frame_rate: movie.frame_rate,
 297       duration: movie.duration,
 298       bitrate: movie.bitrate,
 299     }.compact
 300   end
 301
 302   def reset_parent_cache
 303     return if status_id.nil?
 304
 305     Rails.cache.delete("statuses/#{status_id}")
 306   end
 307 end