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Make PreviewCard records reuseable between statuses (#4642)

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* Make PreviewCard records reuseable between statuses

**Warning!** Migration truncates preview_cards tablec

* Allow a wider thumbnail for link preview, display it in horizontal layout (#4648)

* Delete preview cards files before truncating

* Rename old table instead of truncating it

* Add mastodon:maintenance:remove_deprecated_preview_cards

* Ignore deprecated_preview_cards in schema definition

* Fix null behaviour
This commit is contained in:
Eugen Rochko 2017-09-01 16:20:16 +02:00 committed by GitHub
parent 2305f7c391
commit 7dc5035031
13 changed files with 186 additions and 64 deletions
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2
app/controllers/api/v1/statuses_controller.rb
View file

@ -29,7 +29,7 @@ class Api::V1::StatusesController < Api::BaseController
end
def card
@card = PreviewCard.find_by(status: @status)
@card = @status.preview_cards.first
if @card.nil?
render_empty

9
app/javascript/mastodon/features/status/components/card.js
View file

@ -1,6 +1,7 @@
import React from 'react';
import ImmutablePropTypes from 'react-immutable-proptypes';
import punycode from 'punycode';
import classnames from 'classnames';
const IDNA_PREFIX = 'xn--';
@ -32,7 +33,7 @@ export default class Card extends React.PureComponent {
if (card.get('image')) {
image = (
<div className='status-card__image'>
<img src={card.get('image')} alt={card.get('title')} className='status-card__image-image' />
<img src={card.get('image')} alt={card.get('title')} className='status-card__image-image' width={card.get('width')} height={card.get('height')} />
</div>
);
}
@ -41,8 +42,12 @@ export default class Card extends React.PureComponent {
provider = decodeIDNA(getHostname(card.get('url')));
}
const className = classnames('status-card', {
'horizontal': card.get('width') > card.get('height'),
});
return (
<a href={card.get('url')} className='status-card' target='_blank' rel='noopener'>
<a href={card.get('url')} className={className} target='_blank' rel='noopener'>
{image}
<div className='status-card__content'>

12
app/javascript/styles/components.scss
View file

@ -2057,6 +2057,18 @@ button.icon-button.active i.fa-retweet {
background: lighten($ui-base-color, 8%);
}
.status-card.horizontal {
display: block;
.status-card__image {
width: 100%;
}
.status-card__image-image {
border-radius: 4px 4px 0 0;
}
}
.status-card__image-image {
border-radius: 4px 0 0 4px;
display: block;

3
app/models/media_attachment.rb
View file

@ -142,9 +142,11 @@ class MediaAttachment < ApplicationRecord
def populate_meta
meta = {}
file.queued_for_write.each do |style, file|
begin
geo = Paperclip::Geometry.from_file file
meta[style] = {
width: geo.width.to_i,
height: geo.height.to_i,
@ -155,6 +157,7 @@ class MediaAttachment < ApplicationRecord
meta[style] = {}
end
end
meta
end

31
app/models/preview_card.rb
View file

@ -4,16 +4,13 @@
# Table name: preview_cards
#
# id :integer not null, primary key
# status_id :integer
# url :string default(""), not null
# title :string
# description :string
# 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
# created_at :datetime not null
# updated_at :datetime not null
# type :integer default("link"), not null
# html :text default(""), not null
# author_name :string default(""), not null
@ -22,6 +19,8 @@
# 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
#
class PreviewCard < ApplicationRecord
@ -31,21 +30,37 @@ class PreviewCard < ApplicationRecord
enum type: [:link, :photo, :video, :rich]
belongs_to :status
has_and_belongs_to_many :statuses
has_attached_file :image, styles: { original: '120x120#' }, convert_options: { all: '-quality 80 -strip' }
has_attached_file :image, styles: { original: '280x120>' }, convert_options: { all: '-quality 80 -strip' }
include Attachmentable
include Remotable
validates :url, presence: true
validates :url, presence: true, uniqueness: true
validates_attachment_content_type :image, content_type: IMAGE_MIME_TYPES
validates_attachment_size :image, less_than: 1.megabytes
before_save :extract_dimensions, if: :link?
def save_with_optional_image!
save!
rescue ActiveRecord::RecordInvalid
self.image = nil
save!
end
private
def extract_dimensions
file = image.queued_for_write[:original]
return if file.nil?
geo = Paperclip::Geometry.from_file(file)
self.width = geo.width.to_i
self.height = geo.height.to_i
rescue Paperclip::Errors::NotIdentifiedByImageMagickError
nil
end
end

3
app/models/status.rb
View file

@ -47,10 +47,11 @@ class Status < ApplicationRecord
has_many :replies, foreign_key: 'in_reply_to_id', class_name: 'Status', inverse_of: :thread
has_many :mentions, dependent: :destroy
has_many :media_attachments, dependent: :destroy
has_and_belongs_to_many :tags
has_and_belongs_to_many :preview_cards
has_one :notification, as: :activity, dependent: :destroy
has_one :preview_card, dependent: :destroy
has_one :stream_entry, as: :activity, inverse_of: :status
validates :uri, uniqueness: true, unless: :local?

98
app/services/fetch_link_card_service.rb
View file

@ -4,29 +4,45 @@ class FetchLinkCardService < BaseService
URL_PATTERN = %r{https?://\S+}
def call(status)
# Get first http/https URL that isn't local
url = parse_urls(status)
@status = status
@url = parse_urls
return if url.nil?
return if @url.nil? || @status.preview_cards.any?
url = url.to_s
card = PreviewCard.where(status: status).first_or_initialize(status: status, url: url)
res = Request.new(:head, url).perform
@url = @url.to_s
return if res.code != 200 || res.mime_type != 'text/html'
RedisLock.acquire(lock_options) do |lock|
if lock.acquired?
@card = PreviewCard.find_by(url: @url)
process_url if @card.nil?
end
end
attempt_opengraph(card, url) unless attempt_oembed(card, url)
attach_card unless @card.nil?
rescue HTTP::ConnectionError, OpenSSL::SSL::SSLError
nil
end
private
def parse_urls(status)
if status.local?
urls = status.text.match(URL_PATTERN).to_a.map { |uri| Addressable::URI.parse(uri).normalize }
def process_url
@card = PreviewCard.new(url: @url)
res = Request.new(:head, @url).perform
return if res.code != 200 || res.mime_type != 'text/html'
attempt_oembed || attempt_opengraph
end
def attach_card
@status.preview_cards << @card
end
def parse_urls
if @status.local?
urls = @status.text.match(URL_PATTERN).to_a.map { |uri| Addressable::URI.parse(uri).normalize }
else
html = Nokogiri::HTML(status.text)
html = Nokogiri::HTML(@status.text)
links = html.css('a')
urls = links.map { |a| Addressable::URI.parse(a['href']).normalize unless skip_link?(a) }.compact
end
@ -44,41 +60,41 @@ class FetchLinkCardService < BaseService
a['rel']&.include?('tag') || a['class']&.include?('u-url')
end
def attempt_oembed(card, url)
response = OEmbed::Providers.get(url)
def attempt_oembed
response = OEmbed::Providers.get(@url)
card.type = response.type
card.title = response.respond_to?(:title) ? response.title : ''
card.author_name = response.respond_to?(:author_name) ? response.author_name : ''
card.author_url = response.respond_to?(:author_url) ? response.author_url : ''
card.provider_name = response.respond_to?(:provider_name) ? response.provider_name : ''
card.provider_url = response.respond_to?(:provider_url) ? response.provider_url : ''
card.width = 0
card.height = 0
@card.type = response.type
@card.title = response.respond_to?(:title) ? response.title : ''
@card.author_name = response.respond_to?(:author_name) ? response.author_name : ''
@card.author_url = response.respond_to?(:author_url) ? response.author_url : ''
@card.provider_name = response.respond_to?(:provider_name) ? response.provider_name : ''
@card.provider_url = response.respond_to?(:provider_url) ? response.provider_url : ''
@card.width = 0
@card.height = 0
case card.type
case @card.type
when 'link'
card.image = URI.parse(response.thumbnail_url) if response.respond_to?(:thumbnail_url)
@card.image = URI.parse(response.thumbnail_url) if response.respond_to?(:thumbnail_url)
when 'photo'
card.url = response.url
card.width = response.width.presence || 0
card.height = response.height.presence || 0
@card.url = response.url
@card.width = response.width.presence || 0
@card.height = response.height.presence || 0
when 'video'
card.width = response.width.presence || 0
card.height = response.height.presence || 0
card.html = Formatter.instance.sanitize(response.html, Sanitize::Config::MASTODON_OEMBED)
@card.width = response.width.presence || 0
@card.height = response.height.presence || 0
@card.html = Formatter.instance.sanitize(response.html, Sanitize::Config::MASTODON_OEMBED)
when 'rich'
# Most providers rely on <script> tags, which is a no-no
return false
end
card.save_with_optional_image!
@card.save_with_optional_image!
rescue OEmbed::NotFound
false
end
def attempt_opengraph(card, url)
response = Request.new(:get, url).perform
def attempt_opengraph
response = Request.new(:get, @url).perform
return if response.code != 200 || response.mime_type != 'text/html'
@ -90,17 +106,21 @@ class FetchLinkCardService < BaseService
guess = detector.detect(html, response.charset)
page = Nokogiri::HTML(html, nil, guess&.fetch(:encoding))
card.type = :link
card.title = meta_property(page, 'og:title') || page.at_xpath('//title')&.content
card.description = meta_property(page, 'og:description') || meta_property(page, 'description')
card.image_remote_url = meta_property(page, 'og:image') if meta_property(page, 'og:image')
@card.type = :link
@card.title = meta_property(page, 'og:title') || page.at_xpath('//title')&.content || ''
@card.description = meta_property(page, 'og:description') || meta_property(page, 'description') || ''
@card.image_remote_url = meta_property(page, 'og:image') if meta_property(page, 'og:image')
return if card.title.blank?
return if @card.title.blank?
card.save_with_optional_image!
@card.save_with_optional_image!
end
def meta_property(html, property)
html.at_xpath("//meta[@property=\"#{property}\"]")&.attribute('content')&.value || html.at_xpath("//meta[@name=\"#{property}\"]")&.attribute('content')&.value
end
def lock_options
{ redis: Redis.current, key: "fetch:#{@url}" }
end
end

2
config/environment.rb
View file

@ -3,3 +3,5 @@ require_relative 'application'
# Initialize the Rails application.
Rails.application.initialize!
ActiveRecord::SchemaDumper.ignore_tables = ['deprecated_preview_cards']

30
db/migrate/20170901141119_truncate_preview_cards.rb Normal file
View file

@ -0,0 +1,30 @@
class TruncatePreviewCards < ActiveRecord::Migration[5.1]
def up
rename_table :preview_cards, :deprecated_preview_cards
create_table :preview_cards do |t|
t.string :url, default: '', null: false, index: { unique: true }
t.string :title, default: '', null: false
t.string :description, default: '', null: false
t.attachment :image
t.integer :type, default: 0, null: false
t.text :html, default: '', null: false
t.string :author_name, default: '', null: false
t.string :author_url, default: '', null: false
t.string :provider_name, default: '', null: false
t.string :provider_url, default: '', null: false
t.integer :width, default: 0, null: false
t.integer :height, default: 0, null: false
t.timestamps
end
end
def down
if ActiveRecord::Base.connection.table_exists? 'deprecated_preview_cards'
drop_table :preview_cards
rename_table :deprecated_preview_cards, :preview_cards
else
raise ActiveRecord::IrreversibleMigration, 'Previous preview cards table has already been removed'
end
end
end

7
db/migrate/20170901142658_create_join_table_preview_cards_statuses.rb Normal file
View file

@ -0,0 +1,7 @@
class CreateJoinTablePreviewCardsStatuses < ActiveRecord::Migration[5.1]
def change
create_join_table :preview_cards, :statuses do |t|
t.index [:status_id, :preview_card_id]
end
end
end

22
db/schema.rb
View file

@ -10,7 +10,7 @@
#
# It's strongly recommended that you check this file into your version control system.
ActiveRecord::Schema.define(version: 20170829215220) do
ActiveRecord::Schema.define(version: 20170901142658) do
# These are extensions that must be enabled in order to support this database
enable_extension "plpgsql"
@ -224,17 +224,14 @@ ActiveRecord::Schema.define(version: 20170829215220) do
t.index ["uid"], name: "index_oauth_applications_on_uid", unique: true
end
create_table "preview_cards", id: :serial, force: :cascade do |t|
t.bigint "status_id"
create_table "preview_cards", force: :cascade do |t|
t.string "url", default: "", null: false
t.string "title"
t.string "description"
t.string "title", default: "", null: false
t.string "description", default: "", null: false
t.string "image_file_name"
t.string "image_content_type"
t.integer "image_file_size"
t.datetime "image_updated_at"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.integer "type", default: 0, null: false
t.text "html", default: "", null: false
t.string "author_name", default: "", null: false
@ -243,7 +240,15 @@ ActiveRecord::Schema.define(version: 20170829215220) do
t.string "provider_url", default: "", null: false
t.integer "width", default: 0, null: false
t.integer "height", default: 0, null: false
t.index ["status_id"], name: "index_preview_cards_on_status_id", unique: true
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.index ["url"], name: "index_preview_cards_on_url", unique: true
end
create_table "preview_cards_statuses", id: false, force: :cascade do |t|
t.bigint "preview_card_id", null: false
t.bigint "status_id", null: false
t.index ["status_id", "preview_card_id"], name: "index_preview_cards_statuses_on_status_id_and_preview_card_id"
end
create_table "reports", id: :serial, force: :cascade do |t|
@ -432,7 +437,6 @@ ActiveRecord::Schema.define(version: 20170829215220) do
add_foreign_key "oauth_access_tokens", "oauth_applications", column: "application_id", on_delete: :cascade
add_foreign_key "oauth_access_tokens", "users", column: "resource_owner_id", on_delete: :cascade
add_foreign_key "oauth_applications", "users", column: "owner_id", on_delete: :cascade
add_foreign_key "preview_cards", "statuses", on_delete: :cascade
add_foreign_key "reports", "accounts", column: "action_taken_by_account_id", on_delete: :nullify
add_foreign_key "reports", "accounts", column: "target_account_id", on_delete: :cascade
add_foreign_key "reports", "accounts", on_delete: :cascade

23
lib/tasks/mastodon.rake
View file

@ -270,5 +270,28 @@ namespace :mastodon do
ActiveRecord::Base.connection.execute('UPDATE media_attachments SET account_id = NULL FROM media_attachments ma LEFT JOIN accounts a ON a.id = ma.account_id WHERE media_attachments.id = ma.id AND ma.account_id IS NOT NULL AND a.id IS NULL')
ActiveRecord::Base.connection.execute('UPDATE reports SET action_taken_by_account_id = NULL FROM reports r LEFT JOIN accounts a ON a.id = r.action_taken_by_account_id WHERE reports.id = r.id AND r.action_taken_by_account_id IS NOT NULL AND a.id IS NULL')
end
desc 'Remove deprecated preview cards'
task remove_deprecated_preview_cards: :environment do
return unless ActiveRecord::Base.connection.table_exists? 'deprecated_preview_cards'
class DeprecatedPreviewCard < PreviewCard
self.table_name = 'deprecated_preview_cards'
end
puts 'Delete records and associated files from deprecated preview cards? [y/N]: '
confirm = STDIN.gets.chomp
if confirm.casecmp?('y')
DeprecatedPreviewCard.in_batches.destroy_all
puts 'Drop deprecated preview cards table? [y/N]: '
confirm = STDIN.gets.chomp
if confirm.casecmp?('y')
ActiveRecord::Migration.drop_table :deprecated_preview_cards
end
end
end
end
end

6
spec/services/fetch_link_card_service_spec.rb
View file

@ -31,7 +31,7 @@ RSpec.describe FetchLinkCardService do
it 'works with SJIS' do
expect(a_request(:get, 'http://example.com/sjis')).to have_been_made.at_least_once
expect(status.preview_card.title).to eq("SJISのページ")
expect(status.preview_cards.first.title).to eq("SJISのページ")
end
end
@ -40,7 +40,7 @@ RSpec.describe FetchLinkCardService do
it 'works with SJIS even with wrong charset header' do
expect(a_request(:get, 'http://example.com/sjis_with_wrong_charset')).to have_been_made.at_least_once
expect(status.preview_card.title).to eq("SJISのページ")
expect(status.preview_cards.first.title).to eq("SJISのページ")
end
end
@ -49,7 +49,7 @@ RSpec.describe FetchLinkCardService do
it 'works with koi8-r' do
expect(a_request(:get, 'http://example.com/koi8-r')).to have_been_made.at_least_once
expect(status.preview_card.title).to eq("Московя начинаетъ только въ XVI ст. привлекать внимане иностранцевъ.")
expect(status.preview_cards.first.title).to eq("Московя начинаетъ только въ XVI ст. привлекать внимане иностранцевъ.")
end
end
end