Add support for preview cards for local posts/accounts

This commit is contained in:
Claire 2024-02-28 17:18:31 +01:00
parent 7f84bbfd92
commit 61bd11bacf
5 changed files with 215 additions and 4 deletions

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@ -0,0 +1,156 @@
# frozen_string_literal: true
# == Schema Information
#
# Table name: local_preview_cards
#
# id :bigint(8) not null, primary key
# status_id :bigint(8) not null
# target_status_id :bigint(8)
# target_account_id :bigint(8)
# created_at :datetime not null
# updated_at :datetime not null
#
class LocalPreviewCard < ApplicationRecord
include ActionView::Helpers::NumberHelper
include InstanceHelper
include AccountsHelper
include StatusesHelper
belongs_to :status
belongs_to :target_status, class_name: 'Status', optional: true
belongs_to :target_account, class_name: 'Account', optional: true
def url
ActivityPub::TagManager.instance.url_for(object)
end
def embed_url
'' # TODO: audio/video uploads?
end
alias original_url url
def title
account = object.is_a?(Account) ? object : object.account
"#{display_name(account)} (#{acct(account)})"
end
def provider_name
site_title
end
def provider_url
''
end
def author_name
''
end
def author_url
''
end
def description
if object.is_a?(Account)
account_description(object)
elsif object.is_a?(Status)
status_description(object)
end
end
def type
'link'
end
def link_type
object.is_a?(Status) ? 'article' : 'unknown'
end
def html
''
end
def published_at
nil
end
def max_score
nil
end
def max_score_at
nil
end
def trendable
false
end
def image_description
if object.is_a?(Account)
''
elsif object.is_a?(Status)
status_media&.description.presence || ''
end
end
def width
if object.is_a?(Account)
400
elsif object.is_a?(Status)
if status_media&.image? && status_media.file.meta.present?
status_media.file.meta.dig('original', 'width')
else
0 # TODO
end
end
end
def height
if object.is_a?(Account)
400
elsif object.is_a?(Status)
if status_media&.image? && status_media.file.meta.present?
status_media.file.meta.dig('original', 'height')
else
0 # TODO
end
end
end
def blurhash
if object.is_a?(Account)
nil # TODO
elsif object.is_a?(Status)
status_media&.blurhash
end
end
def image
if object.is_a?(Account)
object.avatar
elsif object.is_a?(Status)
status_media&.thumbnail
end
end
def image?
image.present?
end
def language
nil # TODO
end
private
def object
target_status || target_account
end
def status_media
object.ordered_media_attachments.first
end
end

View File

@ -85,6 +85,7 @@ class Status < ApplicationRecord
has_and_belongs_to_many :tags
has_one :preview_cards_status, inverse_of: :status, dependent: :delete
has_one :local_preview_card, inverse_of: :status, dependent: :delete
has_one :notification, as: :activity, dependent: :destroy
has_one :status_stat, inverse_of: :status, dependent: nil
@ -152,6 +153,7 @@ class Status < ApplicationRecord
:status_stat,
:tags,
:preloadable_poll,
:local_preview_card,
preview_cards_status: [:preview_card],
account: [:account_stat, user: :role],
active_mentions: { account: :account_stat },
@ -162,6 +164,7 @@ class Status < ApplicationRecord
:conversation,
:status_stat,
:preloadable_poll,
:local_preview_card,
preview_cards_status: [:preview_card],
account: [:account_stat, user: :role],
active_mentions: { account: :account_stat },
@ -229,10 +232,11 @@ class Status < ApplicationRecord
end
def preview_card
preview_cards_status&.preview_card&.tap { |x| x.original_url = preview_cards_status.url }
local_preview_card || preview_cards_status&.preview_card&.tap { |x| x.original_url = preview_cards_status.url }
end
def reset_preview_card!
LocalPreviewCard.where(status_id: id).delete_all
PreviewCardsStatus.where(status_id: id).delete_all
end
@ -251,7 +255,7 @@ class Status < ApplicationRecord
end
def with_preview_card?
preview_cards_status.present?
local_preview_card.present? || preview_cards_status.present?
end
def with_poll?

View File

@ -23,6 +23,8 @@ class FetchLinkCardService < BaseService
@url = @original_url.to_s
return process_local_url if TagManager.instance.local_url?(@url)
with_redis_lock("fetch:#{@original_url}") do
@card = PreviewCard.find_by(url: @url)
process_url if @card.nil? || @card.updated_at <= 2.weeks.ago || @card.missing_image?
@ -42,6 +44,24 @@ class FetchLinkCardService < BaseService
attempt_oembed || attempt_opengraph
end
def process_local_url
recognized_params = Rails.application.routes.recognize_path(@url)
return unless recognized_params[:action] == 'show'
@card = nil
case recognized_params[:controller]
when 'statuses'
status = Status.where(visibility: [:public, :unlisted]).find_by(id: recognized_params[:id])
@card = LocalPreviewCard.create(status: @status, target_status: status)
when 'accounts'
account = Account.find_local(recognized_params[:username])
@card = LocalPreviewCard.create(status: @status, target_account: account)
end
Rails.cache.delete(@status) if @card.present?
end
def html
return @html if defined?(@html)
@ -85,7 +105,14 @@ class FetchLinkCardService < BaseService
def bad_url?(uri)
# Avoid local instance URLs and invalid URLs
uri.host.blank? || TagManager.instance.local_url?(uri.to_s) || !%w(http https).include?(uri.scheme)
uri.host.blank? || bad_local_url?(uri.to_s) || !%w(http https).include?(uri.scheme)
end
def bad_local_url?(uri)
return false unless TagManager.instance.local_url?(uri.to_s)
recognized_params = Rails.application.routes.recognize_path(uri)
recognized_params[:action] != 'show' || %w(accounts statuses).exclude?(recognized_params[:controller])
end
def mention_link?(anchor)

View File

@ -0,0 +1,10 @@
class CreateLocalPreviewCards < ActiveRecord::Migration[7.1]
def change
create_table :local_preview_cards do |t|
t.belongs_to :status, foreign_key: { on_delete: :cascade }, null: false
t.belongs_to :target_status, foreign_key: { on_delete: :cascade, to_table: :statuses }, null: true
t.belongs_to :target_account, foreign_key: { on_delete: :cascade, to_table: :accounts }, null: true
t.timestamps
end
end
end

View File

@ -10,7 +10,7 @@
#
# It's strongly recommended that you check this file into your version control system.
ActiveRecord::Schema[7.1].define(version: 2024_01_11_033014) do
ActiveRecord::Schema[7.1].define(version: 2024_02_29_163603) do
# These are extensions that must be enabled in order to support this database
enable_extension "plpgsql"
@ -594,6 +594,17 @@ ActiveRecord::Schema[7.1].define(version: 2024_01_11_033014) do
t.index ["account_id"], name: "index_lists_on_account_id"
end
create_table "local_preview_cards", force: :cascade do |t|
t.bigint "status_id", null: false
t.bigint "target_status_id"
t.bigint "target_account_id"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
t.index ["status_id"], name: "index_local_preview_cards_on_status_id"
t.index ["target_account_id"], name: "index_local_preview_cards_on_target_account_id"
t.index ["target_status_id"], name: "index_local_preview_cards_on_target_status_id"
end
create_table "login_activities", force: :cascade do |t|
t.bigint "user_id", null: false
t.string "authentication_method"
@ -1246,6 +1257,9 @@ ActiveRecord::Schema[7.1].define(version: 2024_01_11_033014) do
add_foreign_key "list_accounts", "follows", on_delete: :cascade
add_foreign_key "list_accounts", "lists", on_delete: :cascade
add_foreign_key "lists", "accounts", on_delete: :cascade
add_foreign_key "local_preview_cards", "accounts", column: "target_account_id", on_delete: :cascade
add_foreign_key "local_preview_cards", "statuses", column: "target_status_id", on_delete: :cascade
add_foreign_key "local_preview_cards", "statuses", on_delete: :cascade
add_foreign_key "login_activities", "users", on_delete: :cascade
add_foreign_key "markers", "users", on_delete: :cascade
add_foreign_key "media_attachments", "accounts", name: "fk_96dd81e81b", on_delete: :nullify