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Add support for preview cards for local posts/accounts
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app/models/local_preview_card.rb
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156
app/models/local_preview_card.rb
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# frozen_string_literal: true
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# == Schema Information
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#
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# Table name: local_preview_cards
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#
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# id :bigint(8) not null, primary key
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# status_id :bigint(8) not null
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# target_status_id :bigint(8)
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# target_account_id :bigint(8)
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# created_at :datetime not null
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# updated_at :datetime not null
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#
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class LocalPreviewCard < ApplicationRecord
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include ActionView::Helpers::NumberHelper
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include InstanceHelper
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include AccountsHelper
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include StatusesHelper
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belongs_to :status
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belongs_to :target_status, class_name: 'Status', optional: true
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belongs_to :target_account, class_name: 'Account', optional: true
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def url
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ActivityPub::TagManager.instance.url_for(object)
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end
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def embed_url
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'' # TODO: audio/video uploads?
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end
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alias original_url url
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def title
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account = object.is_a?(Account) ? object : object.account
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"#{display_name(account)} (#{acct(account)})"
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end
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def provider_name
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site_title
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end
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def provider_url
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''
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end
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def author_name
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''
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end
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def author_url
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''
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end
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def description
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if object.is_a?(Account)
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account_description(object)
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elsif object.is_a?(Status)
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status_description(object)
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end
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end
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def type
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'link'
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end
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def link_type
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object.is_a?(Status) ? 'article' : 'unknown'
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end
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def html
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''
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end
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def published_at
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nil
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end
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def max_score
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nil
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end
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def max_score_at
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nil
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end
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def trendable
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false
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end
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def image_description
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if object.is_a?(Account)
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''
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elsif object.is_a?(Status)
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status_media&.description.presence || ''
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end
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end
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def width
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if object.is_a?(Account)
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400
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elsif object.is_a?(Status)
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if status_media&.image? && status_media.file.meta.present?
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status_media.file.meta.dig('original', 'width')
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else
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0 # TODO
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end
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end
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end
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def height
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if object.is_a?(Account)
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400
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elsif object.is_a?(Status)
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if status_media&.image? && status_media.file.meta.present?
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status_media.file.meta.dig('original', 'height')
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else
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0 # TODO
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end
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end
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end
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def blurhash
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if object.is_a?(Account)
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nil # TODO
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elsif object.is_a?(Status)
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status_media&.blurhash
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end
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end
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def image
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if object.is_a?(Account)
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object.avatar
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elsif object.is_a?(Status)
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status_media&.thumbnail
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end
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end
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def image?
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image.present?
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end
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def language
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nil # TODO
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end
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private
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def object
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target_status || target_account
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end
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def status_media
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object.ordered_media_attachments.first
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end
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end
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@ -85,6 +85,7 @@ class Status < ApplicationRecord
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has_and_belongs_to_many :tags
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has_one :preview_cards_status, inverse_of: :status, dependent: :delete
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has_one :local_preview_card, inverse_of: :status, dependent: :delete
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has_one :notification, as: :activity, dependent: :destroy
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has_one :status_stat, inverse_of: :status, dependent: nil
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@ -152,6 +153,7 @@ class Status < ApplicationRecord
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:status_stat,
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:tags,
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:preloadable_poll,
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:local_preview_card,
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preview_cards_status: [:preview_card],
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account: [:account_stat, user: :role],
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active_mentions: { account: :account_stat },
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@ -162,6 +164,7 @@ class Status < ApplicationRecord
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:conversation,
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:status_stat,
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:preloadable_poll,
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:local_preview_card,
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preview_cards_status: [:preview_card],
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account: [:account_stat, user: :role],
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active_mentions: { account: :account_stat },
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@ -229,10 +232,11 @@ class Status < ApplicationRecord
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end
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def preview_card
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preview_cards_status&.preview_card&.tap { |x| x.original_url = preview_cards_status.url }
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local_preview_card || preview_cards_status&.preview_card&.tap { |x| x.original_url = preview_cards_status.url }
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end
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def reset_preview_card!
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LocalPreviewCard.where(status_id: id).delete_all
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PreviewCardsStatus.where(status_id: id).delete_all
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end
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@ -251,7 +255,7 @@ class Status < ApplicationRecord
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end
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def with_preview_card?
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preview_cards_status.present?
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local_preview_card.present? || preview_cards_status.present?
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end
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def with_poll?
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@ -23,6 +23,8 @@ class FetchLinkCardService < BaseService
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@url = @original_url.to_s
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return process_local_url if TagManager.instance.local_url?(@url)
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with_redis_lock("fetch:#{@original_url}") do
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@card = PreviewCard.find_by(url: @url)
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process_url if @card.nil? || @card.updated_at <= 2.weeks.ago || @card.missing_image?
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@ -42,6 +44,24 @@ class FetchLinkCardService < BaseService
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attempt_oembed || attempt_opengraph
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end
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def process_local_url
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recognized_params = Rails.application.routes.recognize_path(@url)
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return unless recognized_params[:action] == 'show'
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@card = nil
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case recognized_params[:controller]
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when 'statuses'
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status = Status.where(visibility: [:public, :unlisted]).find_by(id: recognized_params[:id])
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@card = LocalPreviewCard.create(status: @status, target_status: status)
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when 'accounts'
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account = Account.find_local(recognized_params[:username])
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@card = LocalPreviewCard.create(status: @status, target_account: account)
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end
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Rails.cache.delete(@status) if @card.present?
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end
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def html
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return @html if defined?(@html)
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@ -85,7 +105,14 @@ class FetchLinkCardService < BaseService
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def bad_url?(uri)
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# Avoid local instance URLs and invalid URLs
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uri.host.blank? || TagManager.instance.local_url?(uri.to_s) || !%w(http https).include?(uri.scheme)
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uri.host.blank? || bad_local_url?(uri.to_s) || !%w(http https).include?(uri.scheme)
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end
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def bad_local_url?(uri)
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return false unless TagManager.instance.local_url?(uri.to_s)
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recognized_params = Rails.application.routes.recognize_path(uri)
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recognized_params[:action] != 'show' || %w(accounts statuses).exclude?(recognized_params[:controller])
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end
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def mention_link?(anchor)
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10
db/migrate/20240229163603_create_local_preview_cards.rb
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10
db/migrate/20240229163603_create_local_preview_cards.rb
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class CreateLocalPreviewCards < ActiveRecord::Migration[7.1]
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def change
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create_table :local_preview_cards do |t|
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t.belongs_to :status, foreign_key: { on_delete: :cascade }, null: false
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t.belongs_to :target_status, foreign_key: { on_delete: :cascade, to_table: :statuses }, null: true
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t.belongs_to :target_account, foreign_key: { on_delete: :cascade, to_table: :accounts }, null: true
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t.timestamps
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end
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end
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end
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16
db/schema.rb
16
db/schema.rb
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#
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# It's strongly recommended that you check this file into your version control system.
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ActiveRecord::Schema[7.1].define(version: 2024_01_11_033014) do
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ActiveRecord::Schema[7.1].define(version: 2024_02_29_163603) do
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# These are extensions that must be enabled in order to support this database
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enable_extension "plpgsql"
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t.index ["account_id"], name: "index_lists_on_account_id"
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end
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create_table "local_preview_cards", force: :cascade do |t|
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t.bigint "status_id", null: false
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t.bigint "target_status_id"
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t.bigint "target_account_id"
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t.datetime "created_at", null: false
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t.datetime "updated_at", null: false
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t.index ["status_id"], name: "index_local_preview_cards_on_status_id"
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t.index ["target_account_id"], name: "index_local_preview_cards_on_target_account_id"
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t.index ["target_status_id"], name: "index_local_preview_cards_on_target_status_id"
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end
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create_table "login_activities", force: :cascade do |t|
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t.bigint "user_id", null: false
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t.string "authentication_method"
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@ -1246,6 +1257,9 @@ ActiveRecord::Schema[7.1].define(version: 2024_01_11_033014) do
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add_foreign_key "list_accounts", "follows", on_delete: :cascade
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add_foreign_key "list_accounts", "lists", on_delete: :cascade
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add_foreign_key "lists", "accounts", on_delete: :cascade
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add_foreign_key "local_preview_cards", "accounts", column: "target_account_id", on_delete: :cascade
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add_foreign_key "local_preview_cards", "statuses", column: "target_status_id", on_delete: :cascade
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add_foreign_key "local_preview_cards", "statuses", on_delete: :cascade
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add_foreign_key "login_activities", "users", on_delete: :cascade
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add_foreign_key "markers", "users", on_delete: :cascade
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add_foreign_key "media_attachments", "accounts", name: "fk_96dd81e81b", on_delete: :nullify
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