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
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
|
# 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
# image_storage_schema_version :integer
# blurhash :string
# language :string
# max_score :float
# max_score_at :datetime
# trendable :boolean
# link_type :integer
#
class PreviewCard < ApplicationRecord
include Attachmentable
IMAGE_MIME_TYPES = ['image/jpeg', 'image/png', 'image/gif', 'image/webp'].freeze
LIMIT = 1.megabytes
BLURHASH_OPTIONS = {
x_comp: 4,
y_comp: 4,
}.freeze
self.inheritance_column = false
enum type: [:link, :photo, :video, :rich]
enum link_type: [:unknown, :article]
has_and_belongs_to_many :statuses
has_one :trend, class_name: 'PreviewCardTrend', inverse_of: :preview_card, dependent: :destroy
has_attached_file :image, processors: [:thumbnail, :blurhash_transcoder], styles: ->(f) { image_styles(f) }, convert_options: { all: '-quality 90 +profile "!icc,*" +set modify-date +set create-date' }, validate_media_type: false
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 appropriate_for_trends?
link? && article? && title.present? && description.present? && image.present? && provider_name.present?
end
def domain
@domain ||= Addressable::URI.parse(url).normalized_host
end
def provider
@provider ||= PreviewCardProvider.matching_domain(domain)
end
def trendable?
if attributes['trendable'].nil?
provider&.trendable?
else
attributes['trendable']
end
end
def requires_review?
attributes['trendable'].nil? && (provider.nil? || provider.requires_review?)
end
def requires_review_notification?
attributes['trendable'].nil? && (provider.nil? || provider.requires_review_notification?)
end
def decaying?
max_score_at && max_score_at >= Trends.links.options[:max_score_cooldown].ago && max_score_at < 1.day.ago
end
attr_writer :provider
def local?
false
end
def missing_image?
width.present? && height.present? && image_file_name.blank?
end
def save_with_optional_image!
save!
rescue ActiveRecord::RecordInvalid
self.image = nil
save!
end
def history
@history ||= Trends::History.new('links', id)
end
class << self
private
def image_styles(file)
styles = {
original: {
geometry: '400x400>',
file_geometry_parser: FastGeometryParser,
convert_options: '-coalesce',
blurhash: BLURHASH_OPTIONS,
},
}
styles[:original][:format] = 'jpg' if file.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
|
