1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
|
# frozen_string_literal: true
# == Schema Information
#
# Table name: preview_cards
#
# id :bigint(8) not null, primary key
# url :string default(""), not null
# title :string default(""), not null
# description :string default(""), not null
# image_file_name :string
# image_content_type :string
# image_file_size :integer
# image_updated_at :datetime
# type :integer default("link"), not null
# html :text default(""), not null
# author_name :string default(""), not null
# author_url :string default(""), not null
# provider_name :string default(""), not null
# provider_url :string default(""), not null
# width :integer default(0), not null
# height :integer default(0), not null
# created_at :datetime not null
# updated_at :datetime not null
# embed_url :string default(""), not null
#
class PreviewCard < ApplicationRecord
IMAGE_MIME_TYPES = ['image/jpeg', 'image/png', 'image/gif'].freeze
LIMIT = 1.megabytes
self.inheritance_column = false
enum type: [:link, :photo, :video, :rich]
has_and_belongs_to_many :statuses
has_attached_file :image, styles: ->(f) { image_styles(f) }, convert_options: { all: '-quality 80 -strip' }
include Attachmentable
validates :url, presence: true, uniqueness: true
validates_attachment_content_type :image, content_type: IMAGE_MIME_TYPES
validates_attachment_size :image, less_than: LIMIT
remotable_attachment :image, LIMIT
scope :cached, -> { where.not(image_file_name: [nil, '']) }
before_save :extract_dimensions, if: :link?
def save_with_optional_image!
save!
rescue ActiveRecord::RecordInvalid
self.image = nil
save!
end
class << self
private
def image_styles(f)
styles = {
original: {
geometry: '400x400>',
file_geometry_parser: FastGeometryParser,
convert_options: '-coalesce -strip',
},
}
styles[:original][:format] = 'jpg' if f.instance.image_content_type == 'image/gif'
styles
end
end
private
def extract_dimensions
file = image.queued_for_write[:original]
return if file.nil?
width, height = FastImage.size(file.path)
return nil if width.nil?
self.width = width
self.height = height
end
end
|
