From c09b8a716473ff251ecd81fe6050a38133ddabb0 Mon Sep 17 00:00:00 2001
From: Matt Jankowski <matt@jankowski.online>
Date: Wed, 13 Mar 2024 10:11:23 -0400
Subject: [PATCH 1/4] Add `Account.without_internal` scope (#29559)

Co-authored-by: Claire <claire.github-309c@sitedethib.com>
---
 app/controllers/application_controller.rb | 2 +-
 app/helpers/application_helper.rb         | 2 +-
 app/models/account.rb                     | 1 +
 spec/models/account_spec.rb               | 8 ++++----
 4 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index a046ea19c9..8ba10d64c0 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -129,7 +129,7 @@ class ApplicationController < ActionController::Base
   end
 
   def single_user_mode?
-    @single_user_mode ||= Rails.configuration.x.single_user_mode && Account.where('id > 0').exists?
+    @single_user_mode ||= Rails.configuration.x.single_user_mode && Account.without_internal.exists?
   end
 
   def use_seamless_external_login?
diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index 4f7f66985d..a4f92743c5 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -213,7 +213,7 @@ module ApplicationHelper
       state_params[:moved_to_account] = current_account.moved_to_account
     end
 
-    state_params[:owner] = Account.local.without_suspended.where('id > 0').first if single_user_mode?
+    state_params[:owner] = Account.local.without_suspended.without_internal.first if single_user_mode?
 
     json = ActiveModelSerializers::SerializableResource.new(InitialStatePresenter.new(state_params), serializer: InitialStateSerializer).to_json
     # rubocop:disable Rails/OutputSafety
diff --git a/app/models/account.rb b/app/models/account.rb
index d627fd6b64..0a4c0f3478 100644
--- a/app/models/account.rb
+++ b/app/models/account.rb
@@ -111,6 +111,7 @@ class Account < ApplicationRecord
 
   normalizes :username, with: ->(username) { username.squish }
 
+  scope :without_internal, -> { where(id: 1...) }
   scope :remote, -> { where.not(domain: nil) }
   scope :local, -> { where(domain: nil) }
   scope :partitioned, -> { order(Arel.sql('row_number() over (partition by domain)')) }
diff --git a/spec/models/account_spec.rb b/spec/models/account_spec.rb
index f6376eb36e..bdb33e53ce 100644
--- a/spec/models/account_spec.rb
+++ b/spec/models/account_spec.rb
@@ -888,7 +888,7 @@ RSpec.describe Account do
           { username: 'b', domain: 'b' },
         ].map(&method(:Fabricate).curry(2).call(:account))
 
-        expect(described_class.where('id > 0').alphabetic).to eq matches
+        expect(described_class.without_internal.alphabetic).to eq matches
       end
     end
 
@@ -939,7 +939,7 @@ RSpec.describe Account do
       it 'returns an array of accounts who do not have a domain' do
         local_account = Fabricate(:account, domain: nil)
         _account_with_domain = Fabricate(:account, domain: 'example.com')
-        expect(described_class.where('id > 0').local).to contain_exactly(local_account)
+        expect(described_class.without_internal.local).to contain_exactly(local_account)
       end
     end
 
@@ -950,14 +950,14 @@ RSpec.describe Account do
           matches[index] = Fabricate(:account, domain: matches[index])
         end
 
-        expect(described_class.where('id > 0').partitioned).to match_array(matches)
+        expect(described_class.without_internal.partitioned).to match_array(matches)
       end
     end
 
     describe 'recent' do
       it 'returns a relation of accounts sorted by recent creation' do
         matches = Array.new(2) { Fabricate(:account) }
-        expect(described_class.where('id > 0').recent).to match_array(matches)
+        expect(described_class.without_internal.recent).to match_array(matches)
       end
     end
 

From 6262ceeb704c9636f09c25e856638ee4441b58d9 Mon Sep 17 00:00:00 2001
From: Matt Jankowski <matt@jankowski.online>
Date: Wed, 13 Mar 2024 11:42:39 -0400
Subject: [PATCH 2/4] Fix `RSpec/DescribedClass` cop (#29472)

---
 spec/lib/feed_manager_spec.rb                 | 12 +++++-----
 spec/lib/sanitize/config_spec.rb              |  2 +-
 spec/lib/signature_parser_spec.rb             |  2 +-
 spec/lib/webfinger_resource_spec.rb           |  4 ++--
 spec/models/account_spec.rb                   |  2 +-
 spec/models/form/import_spec.rb               |  2 +-
 spec/models/privacy_policy_spec.rb            |  2 +-
 spec/models/tag_spec.rb                       |  2 +-
 spec/models/user_role_spec.rb                 | 22 +++++++++----------
 spec/models/user_settings_spec.rb             |  4 ++--
 spec/services/post_status_service_spec.rb     |  2 +-
 .../validators/follow_limit_validator_spec.rb |  2 +-
 12 files changed, 29 insertions(+), 29 deletions(-)

diff --git a/spec/lib/feed_manager_spec.rb b/spec/lib/feed_manager_spec.rb
index 618b6167bd..613bcb3045 100644
--- a/spec/lib/feed_manager_spec.rb
+++ b/spec/lib/feed_manager_spec.rb
@@ -11,7 +11,7 @@ RSpec.describe FeedManager do
   end
 
   it 'tracks at least as many statuses as reblogs', :skip_stub do
-    expect(FeedManager::REBLOG_FALLOFF).to be <= FeedManager::MAX_ITEMS
+    expect(described_class::REBLOG_FALLOFF).to be <= described_class::MAX_ITEMS
   end
 
   describe '#key' do
@@ -225,12 +225,12 @@ RSpec.describe FeedManager do
     it 'trims timelines if they will have more than FeedManager::MAX_ITEMS' do
       account = Fabricate(:account)
       status = Fabricate(:status)
-      members = Array.new(FeedManager::MAX_ITEMS) { |count| [count, count] }
+      members = Array.new(described_class::MAX_ITEMS) { |count| [count, count] }
       redis.zadd("feed:home:#{account.id}", members)
 
       described_class.instance.push_to_home(account, status)
 
-      expect(redis.zcard("feed:home:#{account.id}")).to eq FeedManager::MAX_ITEMS
+      expect(redis.zcard("feed:home:#{account.id}")).to eq described_class::MAX_ITEMS
     end
 
     context 'with reblogs' do
@@ -260,7 +260,7 @@ RSpec.describe FeedManager do
         described_class.instance.push_to_home(account, reblogged)
 
         # Fill the feed with intervening statuses
-        FeedManager::REBLOG_FALLOFF.times do
+        described_class::REBLOG_FALLOFF.times do
           described_class.instance.push_to_home(account, Fabricate(:status))
         end
 
@@ -321,7 +321,7 @@ RSpec.describe FeedManager do
         described_class.instance.push_to_home(account, reblogs.first)
 
         # Fill the feed with intervening statuses
-        FeedManager::REBLOG_FALLOFF.times do
+        described_class::REBLOG_FALLOFF.times do
           described_class.instance.push_to_home(account, Fabricate(:status))
         end
 
@@ -467,7 +467,7 @@ RSpec.describe FeedManager do
       status    = Fabricate(:status, reblog: reblogged)
 
       described_class.instance.push_to_home(receiver, reblogged)
-      FeedManager::REBLOG_FALLOFF.times { described_class.instance.push_to_home(receiver, Fabricate(:status)) }
+      described_class::REBLOG_FALLOFF.times { described_class.instance.push_to_home(receiver, Fabricate(:status)) }
       described_class.instance.push_to_home(receiver, status)
 
       # The reblogging status should show up under normal conditions.
diff --git a/spec/lib/sanitize/config_spec.rb b/spec/lib/sanitize/config_spec.rb
index 550ad1c52b..2d8dc2f63b 100644
--- a/spec/lib/sanitize/config_spec.rb
+++ b/spec/lib/sanitize/config_spec.rb
@@ -4,7 +4,7 @@ require 'rails_helper'
 
 describe Sanitize::Config do
   describe '::MASTODON_STRICT' do
-    subject { Sanitize::Config::MASTODON_STRICT }
+    subject { described_class::MASTODON_STRICT }
 
     it 'converts h1 to p strong' do
       expect(Sanitize.fragment('<h1>Foo</h1>', subject)).to eq '<p><strong>Foo</strong></p>'
diff --git a/spec/lib/signature_parser_spec.rb b/spec/lib/signature_parser_spec.rb
index 08e9bea66c..3f398e8dd0 100644
--- a/spec/lib/signature_parser_spec.rb
+++ b/spec/lib/signature_parser_spec.rb
@@ -27,7 +27,7 @@ RSpec.describe SignatureParser do
       let(:header) { 'hello this is malformed!' }
 
       it 'raises an error' do
-        expect { subject }.to raise_error(SignatureParser::ParsingError)
+        expect { subject }.to raise_error(described_class::ParsingError)
       end
     end
   end
diff --git a/spec/lib/webfinger_resource_spec.rb b/spec/lib/webfinger_resource_spec.rb
index 0e2bdcb71a..442f91aad0 100644
--- a/spec/lib/webfinger_resource_spec.rb
+++ b/spec/lib/webfinger_resource_spec.rb
@@ -46,7 +46,7 @@ describe WebfingerResource do
 
         expect do
           described_class.new(resource).username
-        end.to raise_error(WebfingerResource::InvalidRequest)
+        end.to raise_error(described_class::InvalidRequest)
       end
 
       it 'finds the username in a valid https route' do
@@ -137,7 +137,7 @@ describe WebfingerResource do
 
         expect do
           described_class.new(resource).username
-        end.to raise_error(WebfingerResource::InvalidRequest)
+        end.to raise_error(described_class::InvalidRequest)
       end
     end
   end
diff --git a/spec/models/account_spec.rb b/spec/models/account_spec.rb
index bdb33e53ce..2c5df198d9 100644
--- a/spec/models/account_spec.rb
+++ b/spec/models/account_spec.rb
@@ -678,7 +678,7 @@ RSpec.describe Account do
   end
 
   describe 'MENTION_RE' do
-    subject { Account::MENTION_RE }
+    subject { described_class::MENTION_RE }
 
     it 'matches usernames in the middle of a sentence' do
       expect(subject.match('Hello to @alice from me')[1]).to eq 'alice'
diff --git a/spec/models/form/import_spec.rb b/spec/models/form/import_spec.rb
index 872697485e..c2f41d442c 100644
--- a/spec/models/form/import_spec.rb
+++ b/spec/models/form/import_spec.rb
@@ -30,7 +30,7 @@ RSpec.describe Form::Import do
 
       it 'has errors' do
         subject.validate
-        expect(subject.errors[:data]).to include(I18n.t('imports.errors.over_rows_processing_limit', count: Form::Import::ROWS_PROCESSING_LIMIT))
+        expect(subject.errors[:data]).to include(I18n.t('imports.errors.over_rows_processing_limit', count: described_class::ROWS_PROCESSING_LIMIT))
       end
     end
 
diff --git a/spec/models/privacy_policy_spec.rb b/spec/models/privacy_policy_spec.rb
index 0d74713755..03bbe7264b 100644
--- a/spec/models/privacy_policy_spec.rb
+++ b/spec/models/privacy_policy_spec.rb
@@ -8,7 +8,7 @@ describe PrivacyPolicy do
       it 'has the privacy text' do
         policy = described_class.current
 
-        expect(policy.text).to eq(PrivacyPolicy::DEFAULT_PRIVACY_POLICY)
+        expect(policy.text).to eq(described_class::DEFAULT_PRIVACY_POLICY)
       end
     end
 
diff --git a/spec/models/tag_spec.rb b/spec/models/tag_spec.rb
index 69aaeed0af..5a1d620884 100644
--- a/spec/models/tag_spec.rb
+++ b/spec/models/tag_spec.rb
@@ -22,7 +22,7 @@ RSpec.describe Tag do
   end
 
   describe 'HASHTAG_RE' do
-    subject { Tag::HASHTAG_RE }
+    subject { described_class::HASHTAG_RE }
 
     it 'does not match URLs with anchors with non-hashtag characters' do
       expect(subject.match('Check this out https://medium.com/@alice/some-article#.abcdef123')).to be_nil
diff --git a/spec/models/user_role_spec.rb b/spec/models/user_role_spec.rb
index 96d12263ae..4ab66c3260 100644
--- a/spec/models/user_role_spec.rb
+++ b/spec/models/user_role_spec.rb
@@ -8,7 +8,7 @@ RSpec.describe UserRole do
   describe '#can?' do
     context 'with a single flag' do
       it 'returns true if any of them are present' do
-        subject.permissions = UserRole::FLAGS[:manage_reports]
+        subject.permissions = described_class::FLAGS[:manage_reports]
         expect(subject.can?(:manage_reports)).to be true
       end
 
@@ -19,7 +19,7 @@ RSpec.describe UserRole do
 
     context 'with multiple flags' do
       it 'returns true if any of them are present' do
-        subject.permissions = UserRole::FLAGS[:manage_users]
+        subject.permissions = described_class::FLAGS[:manage_users]
         expect(subject.can?(:manage_reports, :manage_users)).to be true
       end
 
@@ -51,7 +51,7 @@ RSpec.describe UserRole do
 
   describe '#permissions_as_keys' do
     before do
-      subject.permissions = UserRole::FLAGS[:invite_users] | UserRole::FLAGS[:view_dashboard] | UserRole::FLAGS[:manage_reports]
+      subject.permissions = described_class::FLAGS[:invite_users] | described_class::FLAGS[:view_dashboard] | described_class::FLAGS[:manage_reports]
     end
 
     it 'returns an array' do
@@ -70,7 +70,7 @@ RSpec.describe UserRole do
       let(:input) { %w(manage_users) }
 
       it 'sets permission flags' do
-        expect(subject.permissions).to eq UserRole::FLAGS[:manage_users]
+        expect(subject.permissions).to eq described_class::FLAGS[:manage_users]
       end
     end
 
@@ -78,7 +78,7 @@ RSpec.describe UserRole do
       let(:input) { %w(manage_users manage_reports) }
 
       it 'sets permission flags' do
-        expect(subject.permissions).to eq UserRole::FLAGS[:manage_users] | UserRole::FLAGS[:manage_reports]
+        expect(subject.permissions).to eq described_class::FLAGS[:manage_users] | described_class::FLAGS[:manage_reports]
       end
     end
 
@@ -86,7 +86,7 @@ RSpec.describe UserRole do
       let(:input) { %w(foo) }
 
       it 'does not set permission flags' do
-        expect(subject.permissions).to eq UserRole::Flags::NONE
+        expect(subject.permissions).to eq described_class::Flags::NONE
       end
     end
   end
@@ -96,7 +96,7 @@ RSpec.describe UserRole do
       subject { described_class.nobody }
 
       it 'returns none' do
-        expect(subject.computed_permissions).to eq UserRole::Flags::NONE
+        expect(subject.computed_permissions).to eq described_class::Flags::NONE
       end
     end
 
@@ -110,11 +110,11 @@ RSpec.describe UserRole do
 
     context 'when role has the administrator flag' do
       before do
-        subject.permissions = UserRole::FLAGS[:administrator]
+        subject.permissions = described_class::FLAGS[:administrator]
       end
 
       it 'returns all permissions' do
-        expect(subject.computed_permissions).to eq UserRole::Flags::ALL
+        expect(subject.computed_permissions).to eq described_class::Flags::ALL
       end
     end
 
@@ -135,7 +135,7 @@ RSpec.describe UserRole do
     end
 
     it 'has default permissions' do
-      expect(subject.permissions).to eq UserRole::FLAGS[:invite_users]
+      expect(subject.permissions).to eq described_class::FLAGS[:invite_users]
     end
 
     it 'has negative position' do
@@ -155,7 +155,7 @@ RSpec.describe UserRole do
     end
 
     it 'has no permissions' do
-      expect(subject.permissions).to eq UserRole::Flags::NONE
+      expect(subject.permissions).to eq described_class::Flags::NONE
     end
 
     it 'has negative position' do
diff --git a/spec/models/user_settings_spec.rb b/spec/models/user_settings_spec.rb
index 653597c90d..dfc4910d6e 100644
--- a/spec/models/user_settings_spec.rb
+++ b/spec/models/user_settings_spec.rb
@@ -24,7 +24,7 @@ RSpec.describe UserSettings do
 
     context 'when setting was not defined' do
       it 'raises error' do
-        expect { subject[:foo] }.to raise_error UserSettings::KeyError
+        expect { subject[:foo] }.to raise_error described_class::KeyError
       end
     end
   end
@@ -93,7 +93,7 @@ RSpec.describe UserSettings do
   describe '.definition_for' do
     context 'when key is defined' do
       it 'returns a setting' do
-        expect(described_class.definition_for(:always_send_emails)).to be_a UserSettings::Setting
+        expect(described_class.definition_for(:always_send_emails)).to be_a described_class::Setting
       end
     end
 
diff --git a/spec/services/post_status_service_spec.rb b/spec/services/post_status_service_spec.rb
index ee68092a36..3c2e4f3a79 100644
--- a/spec/services/post_status_service_spec.rb
+++ b/spec/services/post_status_service_spec.rb
@@ -150,7 +150,7 @@ RSpec.describe PostStatusService do
 
     expect do
       subject.call(account, text: '@alice hm, @bob is really annoying lately', allowed_mentions: [mentioned_account.id])
-    end.to raise_error(an_instance_of(PostStatusService::UnexpectedMentionsError).and(having_attributes(accounts: [unexpected_mentioned_account])))
+    end.to raise_error(an_instance_of(described_class::UnexpectedMentionsError).and(having_attributes(accounts: [unexpected_mentioned_account])))
   end
 
   it 'processes duplicate mentions correctly' do
diff --git a/spec/validators/follow_limit_validator_spec.rb b/spec/validators/follow_limit_validator_spec.rb
index 51b0683d27..e069b0ed3a 100644
--- a/spec/validators/follow_limit_validator_spec.rb
+++ b/spec/validators/follow_limit_validator_spec.rb
@@ -56,7 +56,7 @@ RSpec.describe FollowLimitValidator do
 
             follow.valid?
 
-            expect(follow.errors[:base]).to include(I18n.t('users.follow_limit_reached', limit: FollowLimitValidator::LIMIT))
+            expect(follow.errors[:base]).to include(I18n.t('users.follow_limit_reached', limit: described_class::LIMIT))
           end
         end
 

From 71e5f0f48c3bc95a894fa3ad2c5a34f05c584482 Mon Sep 17 00:00:00 2001
From: Matt Jankowski <matt@jankowski.online>
Date: Wed, 13 Mar 2024 11:43:40 -0400
Subject: [PATCH 3/4] Add coverage for suspended instance actor scenario
 (#29571)

---
 spec/controllers/instance_actors_controller_spec.rb | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/spec/controllers/instance_actors_controller_spec.rb b/spec/controllers/instance_actors_controller_spec.rb
index 70aaff9d65..42ffb67988 100644
--- a/spec/controllers/instance_actors_controller_spec.rb
+++ b/spec/controllers/instance_actors_controller_spec.rb
@@ -41,6 +41,14 @@ RSpec.describe InstanceActorsController do
 
         it_behaves_like 'shared behavior'
       end
+
+      context 'with a suspended instance actor' do
+        let(:authorized_fetch_mode) { false }
+
+        before { Account.representative.update(suspended_at: 10.days.ago) }
+
+        it_behaves_like 'shared behavior'
+      end
     end
   end
 end

From a32a126cac42c73236236b5a9bd660765b9c58ee Mon Sep 17 00:00:00 2001
From: Claire <claire.github-309c@sitedethib.com>
Date: Wed, 13 Mar 2024 17:47:48 +0100
Subject: [PATCH 4/4] Hide media by default in notification requests (#29572)

---
 app/javascript/mastodon/components/status.jsx | 25 ++++++-----
 .../features/notifications/request.jsx        | 41 ++++++++++---------
 .../ui/util/sensitive_media_context.tsx       | 28 +++++++++++++
 3 files changed, 65 insertions(+), 29 deletions(-)
 create mode 100644 app/javascript/mastodon/features/ui/util/sensitive_media_context.tsx

diff --git a/app/javascript/mastodon/components/status.jsx b/app/javascript/mastodon/components/status.jsx
index be9a1cec65..7b97e45766 100644
--- a/app/javascript/mastodon/components/status.jsx
+++ b/app/javascript/mastodon/components/status.jsx
@@ -22,6 +22,7 @@ import Card from '../features/status/components/card';
 // to use the progress bar to show download progress
 import Bundle from '../features/ui/components/bundle';
 import { MediaGallery, Video, Audio } from '../features/ui/util/async-components';
+import { SensitiveMediaContext } from '../features/ui/util/sensitive_media_context';
 import { displayMedia } from '../initial_state';
 
 import { Avatar } from './avatar';
@@ -78,6 +79,8 @@ const messages = defineMessages({
 
 class Status extends ImmutablePureComponent {
 
+  static contextType = SensitiveMediaContext;
+
   static propTypes = {
     status: ImmutablePropTypes.map,
     account: ImmutablePropTypes.record,
@@ -133,19 +136,21 @@ class Status extends ImmutablePureComponent {
   ];
 
   state = {
-    showMedia: defaultMediaVisibility(this.props.status),
-    statusId: undefined,
+    showMedia: defaultMediaVisibility(this.props.status) && !(this.context?.hideMediaByDefault),
     forceFilter: undefined,
   };
 
-  static getDerivedStateFromProps(nextProps, prevState) {
-    if (nextProps.status && nextProps.status.get('id') !== prevState.statusId) {
-      return {
-        showMedia: defaultMediaVisibility(nextProps.status),
-        statusId: nextProps.status.get('id'),
-      };
-    } else {
-      return null;
+  componentDidUpdate (prevProps) {
+    // This will potentially cause a wasteful redraw, but in most cases `Status` components are used
+    // with a `key` directly depending on their `id`, preventing re-use of the component across
+    // different IDs.
+    // But just in case this does change, reset the state on status change.
+
+    if (this.props.status?.get('id') !== prevProps.status?.get('id')) {
+      this.setState({
+        showMedia: defaultMediaVisibility(this.props.status) && !(this.context?.hideMediaByDefault),
+        forceFilter: undefined,
+      });
     }
   }
 
diff --git a/app/javascript/mastodon/features/notifications/request.jsx b/app/javascript/mastodon/features/notifications/request.jsx
index 5977a6ce96..da9ed21e55 100644
--- a/app/javascript/mastodon/features/notifications/request.jsx
+++ b/app/javascript/mastodon/features/notifications/request.jsx
@@ -15,6 +15,7 @@ import Column from 'mastodon/components/column';
 import ColumnHeader from 'mastodon/components/column_header';
 import { IconButton } from 'mastodon/components/icon_button';
 import ScrollableList from 'mastodon/components/scrollable_list';
+import { SensitiveMediaContextProvider } from 'mastodon/features/ui/util/sensitive_media_context';
 
 import NotificationContainer from './containers/notification_container';
 
@@ -106,25 +107,27 @@ export const NotificationRequest = ({ multiColumn, params: { id } }) => {
         )}
       />
 
-      <ScrollableList
-        scrollKey={`notification_requests/${id}`}
-        trackScroll={!multiColumn}
-        bindToDocument={!multiColumn}
-        isLoading={isLoading}
-        showLoading={isLoading && notifications.size === 0}
-        hasMore={hasMore}
-        onLoadMore={handleLoadMore}
-      >
-        {notifications.map(item => (
-          item && <NotificationContainer
-            key={item.get('id')}
-            notification={item}
-            accountId={item.get('account')}
-            onMoveUp={handleMoveUp}
-            onMoveDown={handleMoveDown}
-          />
-        ))}
-      </ScrollableList>
+      <SensitiveMediaContextProvider hideMediaByDefault>
+        <ScrollableList
+          scrollKey={`notification_requests/${id}`}
+          trackScroll={!multiColumn}
+          bindToDocument={!multiColumn}
+          isLoading={isLoading}
+          showLoading={isLoading && notifications.size === 0}
+          hasMore={hasMore}
+          onLoadMore={handleLoadMore}
+        >
+          {notifications.map(item => (
+            item && <NotificationContainer
+              key={item.get('id')}
+              notification={item}
+              accountId={item.get('account')}
+              onMoveUp={handleMoveUp}
+              onMoveDown={handleMoveDown}
+            />
+          ))}
+        </ScrollableList>
+      </SensitiveMediaContextProvider>
 
       <Helmet>
         <title>{columnTitle}</title>
diff --git a/app/javascript/mastodon/features/ui/util/sensitive_media_context.tsx b/app/javascript/mastodon/features/ui/util/sensitive_media_context.tsx
new file mode 100644
index 0000000000..408154c31b
--- /dev/null
+++ b/app/javascript/mastodon/features/ui/util/sensitive_media_context.tsx
@@ -0,0 +1,28 @@
+import { createContext, useContext, useMemo } from 'react';
+
+export const SensitiveMediaContext = createContext<{
+  hideMediaByDefault: boolean;
+}>({
+  hideMediaByDefault: false,
+});
+
+export function useSensitiveMediaContext() {
+  return useContext(SensitiveMediaContext);
+}
+
+type ContextValue = React.ContextType<typeof SensitiveMediaContext>;
+
+export const SensitiveMediaContextProvider: React.FC<
+  React.PropsWithChildren<{ hideMediaByDefault: boolean }>
+> = ({ hideMediaByDefault, children }) => {
+  const contextValue = useMemo<ContextValue>(
+    () => ({ hideMediaByDefault }),
+    [hideMediaByDefault],
+  );
+
+  return (
+    <SensitiveMediaContext.Provider value={contextValue}>
+      {children}
+    </SensitiveMediaContext.Provider>
+  );
+};