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|
# frozen_string_literal: true
# == Schema Information
#
# Table name: media_attachments
#
# id :integer not null, primary key
# status_id :integer
# file_file_name :string
# file_content_type :string
# file_file_size :integer
# file_updated_at :datetime
# remote_url :string default(""), not null
# created_at :datetime not null
# updated_at :datetime not null
# shortcode :string
# type :integer default("image"), not null
# file_meta :json
# account_id :integer
# description :text
#
require 'mime/types'
class MediaAttachment < ApplicationRecord
self.inheritance_column = nil
enum type: [:image, :gifv, :video, :unknown]
IMAGE_FILE_EXTENSIONS = ['.jpg', '.jpeg', '.png', '.gif'].freeze
VIDEO_FILE_EXTENSIONS = ['.webm', '.mp4', '.m4v'].freeze
IMAGE_MIME_TYPES = ['image/jpeg', 'image/png', 'image/gif'].freeze
VIDEO_MIME_TYPES = ['video/webm', 'video/mp4'].freeze
IMAGE_STYLES = {
original: {
geometry: '1280x1280>',
file_geometry_parser: FastGeometryParser,
},
small: {
geometry: '400x400>',
file_geometry_parser: FastGeometryParser,
},
}.freeze
VIDEO_STYLES = {
small: {
convert_options: {
output: {
vf: 'scale=\'min(400\, iw):min(400\, ih)\':force_original_aspect_ratio=decrease',
},
},
format: 'png',
time: 0,
},
}.freeze
belongs_to :account, inverse_of: :media_attachments, optional: true
belongs_to :status, inverse_of: :media_attachments, optional: true
has_attached_file :file,
styles: ->(f) { file_styles f },
processors: ->(f) { file_processors f },
convert_options: { all: '-quality 90 -strip' }
include Remotable
validates_attachment_content_type :file, content_type: IMAGE_MIME_TYPES + VIDEO_MIME_TYPES
validates_attachment_size :file, less_than: 8.megabytes
validates :account, presence: true
validates :description, length: { maximum: 420 }, if: :local?
scope :attached, -> { where.not(status_id: nil) }
scope :unattached, -> { where(status_id: nil) }
scope :local, -> { where(remote_url: '') }
scope :remote, -> { where.not(remote_url: '') }
default_scope { order(id: :asc) }
def local?
remote_url.blank?
end
def needs_redownload?
file.blank? && remote_url.present?
end
def to_param
shortcode
end
before_create :prepare_description, unless: :local?
before_create :set_shortcode
before_post_process :set_type_and_extension
before_save :set_meta
class << self
private
def file_styles(f)
if f.instance.file_content_type == 'image/gif'
{
small: IMAGE_STYLES[:small],
original: {
format: 'mp4',
convert_options: {
output: {
'movflags' => 'faststart',
'pix_fmt' => 'yuv420p',
'vf' => 'scale=\'trunc(iw/2)*2:trunc(ih/2)*2\'',
'vsync' => 'cfr',
'b:v' => '1300K',
'maxrate' => '500K',
'bufsize' => '1300K',
'crf' => 18,
},
},
},
}
elsif IMAGE_MIME_TYPES.include? f.instance.file_content_type
IMAGE_STYLES
else
VIDEO_STYLES
end
end
def file_processors(f)
if f.file_content_type == 'image/gif'
[:gif_transcoder]
elsif VIDEO_MIME_TYPES.include? f.file_content_type
[:video_transcoder]
else
[:thumbnail]
end
end
end
private
def set_shortcode
self.type = :unknown if file.blank? && !type_changed?
return unless local?
loop do
self.shortcode = SecureRandom.urlsafe_base64(14)
break if MediaAttachment.find_by(shortcode: shortcode).nil?
end
end
def prepare_description
self.description = description.strip[0...420] unless description.nil?
end
def set_type_and_extension
self.type = VIDEO_MIME_TYPES.include?(file_content_type) ? :video : :image
extension = appropriate_extension
basename = Paperclip::Interpolations.basename(file, :original)
file.instance_write :file_name, [basename, extension].delete_if(&:blank?).join('.')
end
def set_meta
meta = populate_meta
return if meta == {}
file.instance_write :meta, meta
end
def populate_meta
meta = {}
file.queued_for_write.each do |style, file|
meta[style] = style == :small || image? ? image_geometry(file) : video_metadata(file)
end
meta
end
def image_geometry(file)
width, height = FastImage.size(file.path)
return {} if width.nil?
{
width: width,
height: height,
size: "#{width}x#{height}",
aspect: width.to_f / height.to_f,
}
end
def video_metadata(file)
movie = FFMPEG::Movie.new(file.path)
return {} unless movie.valid?
{
width: movie.width,
height: movie.height,
frame_rate: movie.frame_rate,
duration: movie.duration,
bitrate: movie.bitrate,
}
end
def appropriate_extension
mime_type = MIME::Types[file.content_type]
extensions_for_mime_type = mime_type.empty? ? [] : mime_type.first.extensions
original_extension = Paperclip::Interpolations.extension(file, :original)
extensions_for_mime_type.include?(original_extension) ? original_extension : extensions_for_mime_type.first
end
end
|
