From 5d710b1139b34f2ed6bd556f448fa7248354e758 Mon Sep 17 00:00:00 2001
From: Eugen <eugen@zeonfederated.com>
Date: Sun, 16 Apr 2017 12:51:30 +0200
Subject: [PATCH] Make file attachment on MediaAttachment optional (#1865)

Create MediaAttachment but without actual file download when domain is blocked with reject_media set to true
Clean up old media files when creating a new domain block with reject_media set to true
Return remote_url in media attachments API if local file is not present
Undo domain block action in admin UI
Ability to enable reject_media from admin UI
---
 .../admin/domain_blocks_controller.rb         | 14 ++++++--
 app/controllers/application_controller.rb     |  4 ++-
 app/models/domain_block.rb                    |  2 ++
 app/services/block_domain_service.rb          | 32 ++++++++++++++++---
 app/services/process_feed_service.rb          | 10 ++++--
 app/services/suspend_account_service.rb       |  3 +-
 app/services/unblock_domain_service.rb        | 15 +++++++++
 app/views/admin/domain_blocks/index.html.haml |  9 +++++-
 app/views/admin/domain_blocks/new.html.haml   |  3 ++
 app/views/admin/domain_blocks/show.html.haml  |  9 ++++++
 app/views/api/v1/statuses/_media.rabl         |  4 +--
 config/locales/en.yml                         | 16 ++++++++++
 config/routes.rb                              |  2 +-
 .../stream_entries/show.html.haml_spec.rb     |  1 -
 14 files changed, 106 insertions(+), 18 deletions(-)
 create mode 100644 app/services/unblock_domain_service.rb
 create mode 100644 app/views/admin/domain_blocks/show.html.haml

diff --git a/app/controllers/admin/domain_blocks_controller.rb b/app/controllers/admin/domain_blocks_controller.rb
index a8b56c0859..5d146d9469 100644
--- a/app/controllers/admin/domain_blocks_controller.rb
+++ b/app/controllers/admin/domain_blocks_controller.rb
@@ -15,16 +15,26 @@ module Admin
 
       if @domain_block.save
         DomainBlockWorker.perform_async(@domain_block.id)
-        redirect_to admin_domain_blocks_path, notice: 'Domain block is now being processed'
+        redirect_to admin_domain_blocks_path, notice: I18n.t('admin.domain_block.created_msg')
       else
         render action: :new
       end
     end
 
+    def show
+      @domain_block = DomainBlock.find(params[:id])
+    end
+
+    def destroy
+      @domain_block = DomainBlock.find(params[:id])
+      UnblockDomainService.new.call(@domain_block, resource_params[:retroactive])
+      redirect_to admin_domain_blocks_path, notice: I18n.t('admin.domain_block.destroyed_msg')
+    end
+
     private
 
     def resource_params
-      params.require(:domain_block).permit(:domain, :severity)
+      params.require(:domain_block).permit(:domain, :severity, :reject_media, :retroactive)
     end
   end
 end
diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index 0c320177dd..e8d7de2188 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -8,7 +8,9 @@ class ApplicationController < ActionController::Base
   force_ssl if: "Rails.env.production? && ENV['LOCAL_HTTPS'] == 'true'"
 
   include Localized
-  helper_method :current_account, :single_user_mode?
+
+  helper_method :current_account
+  helper_method :single_user_mode?
 
   rescue_from ActionController::RoutingError, with: :not_found
   rescue_from ActiveRecord::RecordNotFound, with: :not_found
diff --git a/app/models/domain_block.rb b/app/models/domain_block.rb
index 3548ccd692..89c81f766a 100644
--- a/app/models/domain_block.rb
+++ b/app/models/domain_block.rb
@@ -3,6 +3,8 @@
 class DomainBlock < ApplicationRecord
   enum severity: [:silence, :suspend]
 
+  attr_accessor :retroactive
+
   validates :domain, presence: true, uniqueness: true
 
   def self.blocked?(domain)
diff --git a/app/services/block_domain_service.rb b/app/services/block_domain_service.rb
index 6c131bd341..97d2ebcd76 100644
--- a/app/services/block_domain_service.rb
+++ b/app/services/block_domain_service.rb
@@ -3,12 +3,34 @@
 class BlockDomainService < BaseService
   def call(domain_block)
     if domain_block.silence?
-      Account.where(domain: domain_block.domain).update_all(silenced: true)
+      silence_accounts!(domain_block.domain)
+      clear_media!(domain_block.domain) if domain_block.reject_media?
     else
-      Account.where(domain: domain_block.domain).find_each do |account|
-        account.subscription(api_subscription_url(account.id)).unsubscribe if account.subscribed?
-        SuspendAccountService.new.call(account)
-      end
+      suspend_accounts!(domain_block.domain)
+    end
+  end
+
+  private
+
+  def silence_accounts!(domain)
+    Account.where(domain: domain).update_all(silenced: true)
+  end
+
+  def clear_media!(domain)
+    Account.where(domain: domain).find_each do |account|
+      account.avatar.destroy
+      account.header.destroy
+    end
+
+    MediaAttachment.where(account: Account.where(domain: domain)).find_each do |attachment|
+      attachment.file.destroy
+    end
+  end
+
+  def suspend_accounts!(domain)
+    Account.where(domain: domain).where(suspended: false).find_each do |account|
+      account.subscription(api_subscription_url(account.id)).unsubscribe if account.subscribed?
+      SuspendAccountService.new.call(account)
     end
   end
 end
diff --git a/app/services/process_feed_service.rb b/app/services/process_feed_service.rb
index 321f53f22e..fa0633b275 100644
--- a/app/services/process_feed_service.rb
+++ b/app/services/process_feed_service.rb
@@ -179,12 +179,12 @@ class ProcessFeedService < BaseService
     end
 
     def hashtags_from_xml(parent, xml)
-      tags = xml.xpath('./xmlns:category', xmlns: TagManager::XMLNS).map { |category| category['term'] }.select { |t| !t.blank? }
+      tags = xml.xpath('./xmlns:category', xmlns: TagManager::XMLNS).map { |category| category['term'] }.select(&:present?)
       ProcessHashtagsService.new.call(parent, tags)
     end
 
     def media_from_xml(parent, xml)
-      return if DomainBlock.find_by(domain: parent.account.domain)&.reject_media?
+      do_not_download = DomainBlock.find_by(domain: parent.account.domain)&.reject_media?
 
       xml.xpath('./xmlns:link[@rel="enclosure"]', xmlns: TagManager::XMLNS).each do |link|
         next unless link['href']
@@ -192,7 +192,11 @@ class ProcessFeedService < BaseService
         media = MediaAttachment.where(status: parent, remote_url: link['href']).first_or_initialize(account: parent.account, status: parent, remote_url: link['href'])
         parsed_url = URI.parse(link['href'])
 
-        next if !%w(http https).include?(parsed_url.scheme) || parsed_url.host.empty?
+        next if !%w[http https].include?(parsed_url.scheme) || parsed_url.host.empty?
+
+        media.save
+
+        next if do_not_download
 
         begin
           media.file_remote_url = link['href']
diff --git a/app/services/suspend_account_service.rb b/app/services/suspend_account_service.rb
index 42ff4dcb78..66517470e6 100644
--- a/app/services/suspend_account_service.rb
+++ b/app/services/suspend_account_service.rb
@@ -13,6 +13,7 @@ class SuspendAccountService < BaseService
 
   def purge_content
     @account.statuses.reorder(nil).find_each do |status|
+      # This federates out deletes to previous followers
       RemoveStatusService.new.call(status)
     end
 
@@ -29,9 +30,7 @@ class SuspendAccountService < BaseService
     @account.display_name = ''
     @account.note         = ''
     @account.avatar.destroy
-    @account.avatar.clear
     @account.header.destroy
-    @account.header.clear
     @account.save!
   end
 
diff --git a/app/services/unblock_domain_service.rb b/app/services/unblock_domain_service.rb
new file mode 100644
index 0000000000..9794e439d1
--- /dev/null
+++ b/app/services/unblock_domain_service.rb
@@ -0,0 +1,15 @@
+# frozen_string_literal: true
+
+class UnblockDomainService < BaseService
+  def call(domain_block, retroactive)
+    if retroactive
+      if domain_block.silence?
+        Account.where(domain: domain_block.domain).update_all(silenced: false)
+      else
+        Account.where(domain: domain_block.domain).update_all(suspended: false)
+      end
+    end
+
+    domain_block.destroy
+  end
+end
diff --git a/app/views/admin/domain_blocks/index.html.haml b/app/views/admin/domain_blocks/index.html.haml
index 6f4ba9b579..da9a07bbc0 100644
--- a/app/views/admin/domain_blocks/index.html.haml
+++ b/app/views/admin/domain_blocks/index.html.haml
@@ -6,12 +6,19 @@
     %tr
       %th= t('admin.domain_block.domain')
       %th= t('admin.domain_block.severity')
+      %th= t('admin.domain_block.reject_media')
+      %th
   %tbody
     - @blocks.each do |block|
       %tr
         %td
           %samp= block.domain
-        %td= block.severity
+        %td= t("admin.domain_block.severities.#{block.severity}")
+        %td
+          - if block.reject_media? || block.suspend?
+            %i.fa.fa-check
+        %td
+          = table_link_to 'undo', t('admin.domain_block.undo'), admin_domain_block_path(block)
 
 = paginate @blocks
 = link_to t('admin.domain_block.add_new'), new_admin_domain_block_path, class: 'button'
diff --git a/app/views/admin/domain_blocks/new.html.haml b/app/views/admin/domain_blocks/new.html.haml
index 53aab21ff4..603faeb554 100644
--- a/app/views/admin/domain_blocks/new.html.haml
+++ b/app/views/admin/domain_blocks/new.html.haml
@@ -10,5 +10,8 @@
   = f.input :severity, collection: DomainBlock.severities.keys, wrapper: :with_label, include_blank: false, label_method: lambda { |type| I18n.t("admin.domain_block.new.severity.#{type}") }
 
   %p.hint= t('admin.domain_block.new.severity.desc_html')
+
+  = f.input :reject_media, as: :boolean, wrapper: :with_label, label: I18n.t('admin.domain_block.reject_media'), hint: I18n.t('admin.domain_block.reject_media_hint')
+
   .actions
     = f.button :button, t('admin.domain_block.new.create'), type: :submit
diff --git a/app/views/admin/domain_blocks/show.html.haml b/app/views/admin/domain_blocks/show.html.haml
new file mode 100644
index 0000000000..bf9011c528
--- /dev/null
+++ b/app/views/admin/domain_blocks/show.html.haml
@@ -0,0 +1,9 @@
+- content_for :page_title do
+  = t('admin.domain_block.show.title', domain: @domain_block.domain)
+
+= simple_form_for @domain_block, url: admin_domain_block_path(@domain_block), method: :delete do |f|
+
+  = f.input :retroactive, as: :boolean, wrapper: :with_label, label: I18n.t("admin.domain_block.show.retroactive.#{@domain_block.severity}"), hint: I18n.t('admin.domain_block.show.affected_accounts', count: Account.where(domain: @domain_block.domain).count)
+
+  .actions
+    = f.button :button, t('admin.domain_block.show.undo'), type: :submit
diff --git a/app/views/api/v1/statuses/_media.rabl b/app/views/api/v1/statuses/_media.rabl
index 2f56c6d07d..80d80ea05a 100644
--- a/app/views/api/v1/statuses/_media.rabl
+++ b/app/views/api/v1/statuses/_media.rabl
@@ -1,5 +1,5 @@
 attributes :id, :remote_url, :type
 
-node(:url)         { |media| full_asset_url(media.file.url(:original)) }
-node(:preview_url) { |media| full_asset_url(media.file.url(:small)) }
+node(:url)         { |media| media.file.blank? ? media.remote_url : full_asset_url(media.file.url(:original)) }
+node(:preview_url) { |media| media.file.blank? ? media.remote_url : full_asset_url(media.file.url(:small)) }
 node(:text_url)    { |media| media.local? ? medium_url(media) : nil }
diff --git a/config/locales/en.yml b/config/locales/en.yml
index 474de39853..325df50450 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -81,6 +81,8 @@ en:
       web: Web
     domain_block:
       add_new: Add new
+      created_msg: Domain block is now being processed
+      destroyed_msg: Domain block has been undone
       domain: Domain
       new:
         create: Create block
@@ -90,8 +92,22 @@ en:
           silence: Silence
           suspend: Suspend
         title: New domain block
+      reject_media: Reject media files
+      reject_media_hint: Removes locally stored media files and refuses to download any in the future. Irrelevant for suspensions
+      severities:
+        silence: Silence
+        suspend: Suspend
       severity: Severity
+      show:
+        affected_accounts:
+          one: One account in the database affected
+          other: "%{count} accounts in the database affected"
+        retroactive:
+          silence: Unsilence all existing accounts from this domain
+          suspend: Unsuspend all existing accounts from this domain
+        title: Undo domain block for %{domain}
       title: Domain Blocks
+      undo: Undo
     pubsubhubbub:
       callback_url: Callback URL
       confirmed: Confirmed
diff --git a/config/routes.rb b/config/routes.rb
index 31909a4f4d..fd186c3206 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -78,7 +78,7 @@ Rails.application.routes.draw do
 
   namespace :admin do
     resources :pubsubhubbub, only: [:index]
-    resources :domain_blocks, only: [:index, :new, :create]
+    resources :domain_blocks, only: [:index, :new, :create, :show, :destroy]
     resources :settings, only: [:index, :update]
 
     resources :reports, only: [:index, :show, :update] do
diff --git a/spec/views/stream_entries/show.html.haml_spec.rb b/spec/views/stream_entries/show.html.haml_spec.rb
index 5526d6780e..acc0c39f5b 100644
--- a/spec/views/stream_entries/show.html.haml_spec.rb
+++ b/spec/views/stream_entries/show.html.haml_spec.rb
@@ -61,5 +61,4 @@ describe 'stream_entries/show.html.haml' do
     expect(mf2.entry.in_reply_to.format.author.format.name.to_s).to eq alice.display_name
     expect(mf2.entry.in_reply_to.format.author.format.url.to_s).not_to be_empty
   end
-
 end