Merge branch 'main' into glitch-soc/merge-upstream

Conflicts:
- `.github/dependabot.yml`:
  Updated upstream, removed in glitch-soc to disable noise.
  Kept removed.
- `CODE_OF_CONDUCT.md`:
  Upstream updated to a new version of the covenant, but I have not read it
  yet, so kept unchanged.
- `Gemfile.lock`:
  Not a real conflict, one upstream dependency updated textually too close to
  the glitch-soc only `hcaptcha` dependency.
  Applied upstream changes.
- `app/controllers/admin/base_controller.rb`:
  Minor conflict due to glitch-soc's theming system.
  Applied upstream changes.
- `app/controllers/application_controller.rb`:
  Minor conflict due to glitch-soc's theming system.
  Applied upstream changes.
- `app/controllers/disputes/base_controller.rb`:
  Minor conflict due to glitch-soc's theming system.
  Applied upstream changes.
- `app/controllers/relationships_controller.rb`:
  Minor conflict due to glitch-soc's theming system.
  Applied upstream changes.
- `app/controllers/statuses_cleanup_controller.rb`:
  Minor conflict due to glitch-soc's theming system.
  Applied upstream changes.
- `app/helpers/application_helper.rb`:
  Minor conflict due to glitch-soc's theming system.
  Applied upstream changes.
- `app/javascript/mastodon/features/compose/components/compose_form.jsx`:
  Upstream added a highlight animation for onboarding, while we changed the
  max character limit.
  Applied our local changes on top of upstream's new version.
- `app/views/layouts/application.html.haml`:
  Minor conflict due to glitch-soc's theming system.
  Applied upstream changes.
- `stylelint.config.js`:
  Upstream added ignore paths, glitch-soc had extra ignore paths.
  Added the same paths as upstream.

.eslintrc.js

@@ -27,6 +27,7 @@ module.exports = {
     'import',
     'promise',
     '@typescript-eslint',
+    'formatjs',
   ],
 
   parserOptions: {
@@ -71,7 +72,7 @@ module.exports = {
     'comma-style': ['warn', 'last'],
     'consistent-return': 'error',
     'dot-notation': 'error',
-    eqeqeq: 'error',
+    eqeqeq: ['error', 'always', { 'null': 'ignore' }],
     indent: ['warn', 2],
     'jsx-quotes': ['error', 'prefer-single'],
     'no-case-declarations': 'off',
@@ -218,6 +219,25 @@ module.exports = {
     'promise/no-callback-in-promise': 'off',
     'promise/no-nesting': 'off',
     'promise/no-promise-in-callback': 'off',
+
+    'formatjs/blocklist-elements': 'error',
+    'formatjs/enforce-default-message': ['error', 'literal'],
+    'formatjs/enforce-description': 'off', // description values not currently used
+    'formatjs/enforce-id': 'off', // Explicit IDs are used in the project
+    'formatjs/enforce-placeholders': 'off', // Issues in short_number.jsx
+    'formatjs/enforce-plural-rules': 'error',
+    'formatjs/no-camel-case': 'off', // disabledAccount is only non-conforming
+    'formatjs/no-complex-selectors': 'error',
+    'formatjs/no-emoji': 'error',
+    'formatjs/no-id': 'off', // IDs are used for translation keys
+    'formatjs/no-invalid-icu': 'error',
+    'formatjs/no-literal-string-in-jsx': 'off', // Should be looked at, but mainly flagging punctuation outside of strings
+    'formatjs/no-multiple-plurals': 'off', // Only used by hashtag.jsx
+    'formatjs/no-multiple-whitespaces': 'error',
+    'formatjs/no-offset': 'error',
+    'formatjs/no-useless-message': 'error',
+    'formatjs/prefer-formatted-message': 'error',
+    'formatjs/prefer-pound-in-plural': 'error',
   },
 
   overrides: [

.github/workflows/build-nightly.yml

@@ -0,0 +1,54 @@
+name: Build nightly container image
+on:
+  workflow_dispatch:
+  schedule:
+    - cron: '0 2 * * *' # run at 2 AM UTC
+permissions:
+  contents: read
+  packages: write
+
+jobs:
+  build-nightly-image:
+    runs-on: ubuntu-latest
+
+    concurrency:
+      group: ${{ github.workflow }}-${{ github.ref }}
+      cancel-in-progress: true
+
+    steps:
+      - uses: actions/checkout@v3
+      - uses: hadolint/hadolint-action@v3.1.0
+      - uses: docker/setup-qemu-action@v2
+      - uses: docker/setup-buildx-action@v2
+
+      - name: Log in to the Github Container registry
+        uses: docker/login-action@v2
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - uses: docker/metadata-action@v4
+        id: meta
+        with:
+          images: |
+            ghcr.io/mastodon/mastodon
+          flavor: |
+            latest=auto
+          tags: |
+            type=raw,value=nightly
+            type=schedule,pattern=nightly-{{date 'YYYY-MM-DD' tz='Etc/UTC'}}
+          labels: |
+            org.opencontainers.image.description=Nightly build image used for testing purposes
+
+      - uses: docker/build-push-action@v4
+        with:
+          context: .
+          platforms: linux/amd64,linux/arm64
+          provenance: false
+          builder: ${{ steps.buildx.outputs.name }}
+          push: ${{ github.repository == 'mastodon/mastodon' && github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max

.github/workflows/test-ruby.yml

@@ -104,7 +104,6 @@ jobs:
       fail-fast: false
       matrix:
         ruby-version:
-          - '2.7'
           - '3.0'
           - '3.1'
           - '.ruby-version'
@@ -136,10 +135,6 @@ jobs:
           ruby-version: ${{ matrix.ruby-version}}
           bundler-cache: true
 
-      - name: Update system gems
-        if: matrix.ruby-version == '2.7'
-        run: gem update --system
-
       - name: Load database schema
         run: './bin/rails db:create db:schema:load db:seed'
 

.rubocop.yml

@@ -13,7 +13,7 @@ require:
   - rubocop-capybara
 
 AllCops:
-  TargetRubyVersion: 2.7 # Set to minimum supported version of CI
+  TargetRubyVersion: 3.0 # Set to minimum supported version of CI
   DisplayCopNames: true
   DisplayStyleGuide: true
   ExtraDetails: true

.rubocop_todo.yml

@@ -1,6 +1,6 @@
 # This configuration was generated by
 # `rubocop --auto-gen-config --auto-gen-only-exclude --no-exclude-limit --no-offense-counts --no-auto-gen-timestamp`
-# using RuboCop version 1.48.1.
+# using RuboCop version 1.50.2.
 # The point is for the user to remove these configuration records
 # one by one as the offenses are removed from the code base.
 # Note that changes in the inspected code, or installation of new
@@ -132,7 +132,6 @@ Lint/DuplicateBranch:
 Lint/EmptyBlock:
   Exclude:
     - 'spec/controllers/api/v2/search_controller_spec.rb'
-    - 'spec/controllers/application_controller_spec.rb'
     - 'spec/fabricators/access_token_fabricator.rb'
     - 'spec/fabricators/conversation_fabricator.rb'
     - 'spec/fabricators/system_key_fabricator.rb'
@@ -174,11 +173,6 @@ Lint/EmptyClass:
   Exclude:
     - 'spec/controllers/api/base_controller_spec.rb'
 
-# This cop supports unsafe autocorrection (--autocorrect-all).
-Lint/NonDeterministicRequireOrder:
-  Exclude:
-    - 'spec/rails_helper.rb'
-
 Lint/NonLocalExitFromIterator:
   Exclude:
     - 'app/helpers/jsonld_helper.rb'
@@ -251,7 +245,6 @@ Metrics/ModuleLength:
     - 'app/controllers/concerns/signature_verification.rb'
     - 'app/helpers/application_helper.rb'
     - 'app/helpers/jsonld_helper.rb'
-    - 'app/helpers/statuses_helper.rb'
     - 'app/models/concerns/account_interactions.rb'
     - 'app/models/concerns/has_user_settings.rb'
 
@@ -370,6 +363,7 @@ Performance/MethodObjectAsBlock:
     - 'spec/models/export_spec.rb'
 
 # This cop supports unsafe autocorrection (--autocorrect-all).
+# Configuration parameters: AllowRegexpMatch.
 Performance/RedundantEqualityComparisonBlock:
   Exclude:
     - 'spec/requests/link_headers_spec.rb'
@@ -699,7 +693,6 @@ RSpec/HookArgument:
 RSpec/InstanceVariable:
   Exclude:
     - 'spec/controllers/api/v1/streaming_controller_spec.rb'
-    - 'spec/controllers/application_controller_spec.rb'
     - 'spec/controllers/auth/confirmations_controller_spec.rb'
     - 'spec/controllers/auth/passwords_controller_spec.rb'
     - 'spec/controllers/auth/sessions_controller_spec.rb'
@@ -753,7 +746,6 @@ RSpec/LetSetup:
     - 'spec/controllers/following_accounts_controller_spec.rb'
     - 'spec/controllers/oauth/authorized_applications_controller_spec.rb'
     - 'spec/controllers/oauth/tokens_controller_spec.rb'
-    - 'spec/controllers/tags_controller_spec.rb'
     - 'spec/lib/activitypub/activity/delete_spec.rb'
     - 'spec/lib/vacuum/preview_cards_vacuum_spec.rb'
     - 'spec/models/account_spec.rb'
@@ -780,29 +772,6 @@ RSpec/LetSetup:
     - 'spec/workers/scheduler/accounts_statuses_cleanup_scheduler_spec.rb'
     - 'spec/workers/scheduler/user_cleanup_scheduler_spec.rb'
 
-# This cop supports safe autocorrection (--autocorrect).
-RSpec/MatchArray:
-  Exclude:
-    - 'spec/controllers/activitypub/followers_synchronizations_controller_spec.rb'
-    - 'spec/controllers/admin/export_domain_blocks_controller_spec.rb'
-    - 'spec/controllers/api/v1/accounts/follower_accounts_controller_spec.rb'
-    - 'spec/controllers/api/v1/accounts/following_accounts_controller_spec.rb'
-    - 'spec/controllers/api/v1/accounts/statuses_controller_spec.rb'
-    - 'spec/controllers/api/v1/bookmarks_controller_spec.rb'
-    - 'spec/controllers/api/v1/favourites_controller_spec.rb'
-    - 'spec/controllers/api/v1/reports_controller_spec.rb'
-    - 'spec/controllers/api/v1/statuses/favourited_by_accounts_controller_spec.rb'
-    - 'spec/controllers/api/v1/statuses/reblogged_by_accounts_controller_spec.rb'
-    - 'spec/models/account_filter_spec.rb'
-    - 'spec/models/account_spec.rb'
-    - 'spec/models/account_statuses_cleanup_policy_spec.rb'
-    - 'spec/models/custom_emoji_filter_spec.rb'
-    - 'spec/models/status_spec.rb'
-    - 'spec/models/user_spec.rb'
-    - 'spec/presenters/familiar_followers_presenter_spec.rb'
-    - 'spec/services/activitypub/fetch_featured_collection_service_spec.rb'
-    - 'spec/services/update_status_service_spec.rb'
-
 RSpec/MessageChain:
   Exclude:
     - 'spec/controllers/api/v1/media_controller_spec.rb'
@@ -842,7 +811,6 @@ RSpec/MissingExampleGroupArgument:
     - 'spec/controllers/api/v1/admin/account_actions_controller_spec.rb'
     - 'spec/controllers/api/v1/admin/domain_allows_controller_spec.rb'
     - 'spec/controllers/api/v1/statuses_controller_spec.rb'
-    - 'spec/controllers/application_controller_spec.rb'
     - 'spec/controllers/auth/registrations_controller_spec.rb'
     - 'spec/features/log_in_spec.rb'
     - 'spec/lib/activitypub/activity/undo_spec.rb'
@@ -1225,9 +1193,6 @@ Rails/ActiveRecordCallbacksOrder:
 Rails/ApplicationController:
   Exclude:
     - 'app/controllers/health_controller.rb'
-    - 'app/controllers/well_known/host_meta_controller.rb'
-    - 'app/controllers/well_known/nodeinfo_controller.rb'
-    - 'app/controllers/well_known/webfinger_controller.rb'
 
 # Configuration parameters: Database, Include.
 # SupportedDatabases: mysql, postgresql
@@ -1405,14 +1370,6 @@ Rails/HasManyOrHasOneDependent:
     - 'app/models/user.rb'
     - 'app/models/web/push_subscription.rb'
 
-# Configuration parameters: Include.
-# Include: app/helpers/**/*.rb
-Rails/HelperInstanceVariable:
-  Exclude:
-    - 'app/helpers/application_helper.rb'
-    - 'app/helpers/instance_helper.rb'
-    - 'app/helpers/jsonld_helper.rb'
-
 # This cop supports safe autocorrection (--autocorrect).
 # Configuration parameters: Include.
 # Include: spec/**/*, test/**/*
@@ -1502,15 +1459,6 @@ Rails/RakeEnvironment:
     - 'lib/tasks/repo.rake'
     - 'lib/tasks/statistics.rake'
 
-# This cop supports unsafe autocorrection (--autocorrect-all).
-# Configuration parameters: Include.
-# Include: spec/controllers/**/*.rb, spec/requests/**/*.rb, test/controllers/**/*.rb, test/integration/**/*.rb
-Rails/ResponseParsedBody:
-  Exclude:
-    - 'spec/controllers/follower_accounts_controller_spec.rb'
-    - 'spec/controllers/following_accounts_controller_spec.rb'
-    - 'spec/controllers/settings/two_factor_authentication/webauthn_credentials_controller_spec.rb'
-
 # Configuration parameters: Include.
 # Include: db/**/*.rb
 Rails/ReversibleMigration:
@@ -2256,16 +2204,11 @@ Style/MapToHash:
 # SupportedStyles: literals, strict
 Style/MutableConstant:
   Exclude:
-    - 'app/lib/link_details_extractor.rb'
     - 'app/models/account.rb'
-    - 'app/models/custom_emoji.rb'
     - 'app/models/tag.rb'
-    - 'app/services/account_search_service.rb'
     - 'app/services/delete_account_service.rb'
-    - 'app/services/fetch_link_card_service.rb'
-    - 'app/services/resolve_url_service.rb'
     - 'config/initializers/twitter_regex.rb'
-    - 'lib/mastodon/snowflake.rb'
+    - 'lib/mastodon/migration_warning.rb'
     - 'spec/controllers/api/base_controller_spec.rb'
 
 # This cop supports safe autocorrection (--autocorrect).
@@ -2273,12 +2216,6 @@ Style/NilLambda:
   Exclude:
     - 'config/initializers/paperclip.rb'
 
-# This cop supports safe autocorrection (--autocorrect).
-# Configuration parameters: MinDigits, Strict, AllowedNumbers, AllowedPatterns.
-Style/NumericLiterals:
-  Exclude:
-    - 'config/initializers/strong_migrations.rb'
-
 # Configuration parameters: AllowedMethods.
 # AllowedMethods: respond_to_missing?
 Style/OptionalBooleanParameter:
@@ -2388,7 +2325,6 @@ Style/Semicolon:
   Exclude:
     - 'spec/services/activitypub/process_status_update_service_spec.rb'
     - 'spec/validators/blacklisted_email_validator_spec.rb'
-    - 'spec/workers/scheduler/accounts_statuses_cleanup_scheduler_spec.rb'
 
 # This cop supports safe autocorrection (--autocorrect).
 # Configuration parameters: EnforcedStyle.

Gemfile

@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 source 'https://rubygems.org'
-ruby '>= 2.7.0', '< 3.3.0'
+ruby '>= 3.0.0'
 
 gem 'pkg-config', '~> 1.5'
 
@@ -9,10 +9,10 @@ gem 'puma', '~> 6.2'
 gem 'rails', '~> 6.1.7'
 gem 'sprockets', '~> 3.7.2'
 gem 'thor', '~> 1.2'
-gem 'rack', '~> 2.2.6'
+gem 'rack', '~> 2.2.7'
 
 gem 'haml-rails', '~>2.0'
-gem 'pg', '~> 1.4'
+gem 'pg', '~> 1.5'
 gem 'makara', '~> 0.5'
 gem 'pghero'
 gem 'dotenv-rails', '~> 2.8'
@@ -30,7 +30,10 @@ gem 'browser'
 gem 'charlock_holmes', '~> 0.7.7'
 gem 'chewy', '~> 7.3'
 gem 'devise', '~> 4.9'
-gem 'devise-two-factor', '~> 4.0'
+# The below `v4.x` branch allows attr_encrypted 4.x, which is required for Rails 7.
+# Once a new gem version is pushed, we can go back to released gem and off of github branch.
+gem 'devise-two-factor', github: 'tinfoil/devise-two-factor', branch: 'v4.x'
+gem 'attr_encrypted', '~> 4.0'
 
 group :pam_authentication, optional: true do
   gem 'devise_pam_authenticatable2', '~> 9.2'
@@ -76,7 +79,7 @@ gem 'redcarpet', '~> 3.6'
 gem 'redis', '~> 4.5', require: ['redis', 'redis/connection/hiredis']
 gem 'mario-redis-lock', '~> 1.2', require: 'redis_lock'
 gem 'rqrcode', '~> 2.1'
-gem 'ruby-progressbar', '~> 1.11'
+gem 'ruby-progressbar', '~> 1.13'
 gem 'sanitize', '~> 6.0'
 gem 'scenic', '~> 1.7'
 gem 'sidekiq', '~> 6.5'
@@ -121,7 +124,7 @@ group :test do
   gem 'capybara', '~> 3.39'
   gem 'climate_control'
   gem 'faker', '~> 3.2'
-  gem 'json-schema', '~> 3.0'
+  gem 'json-schema', '~> 4.0'
   gem 'rack-test', '~> 2.1'
   gem 'rails-controller-testing', '~> 1.0'
   gem 'rspec_junit_formatter', '~> 0.6'

Gemfile.lock

@@ -27,6 +27,18 @@ GIT
     rails-settings-cached (0.6.6)
       rails (>= 4.2.0)
 
+GIT
+  remote: https://github.com/tinfoil/devise-two-factor.git
+  revision: e685f91ce62d036259885fbe31fcb4fa930bcfcb
+  branch: v4.x
+  specs:
+    devise-two-factor (4.0.2)
+      activesupport (< 7.1)
+      attr_encrypted (>= 1.3, < 5, != 2)
+      devise (~> 4.0)
+      railties (< 7.1)
+      rotp (~> 6.0)
+
 GEM
   remote: https://rubygems.org/
   specs:
@@ -104,12 +116,12 @@ GEM
       activerecord (>= 3.2, < 8.0)
       rake (>= 10.4, < 14.0)
     ast (2.4.2)
-    attr_encrypted (3.1.0)
+    attr_encrypted (4.0.0)
       encryptor (~> 3.0.0)
     attr_required (1.0.1)
     awrence (1.2.1)
     aws-eventstream (1.2.0)
-    aws-partitions (1.743.0)
+    aws-partitions (1.752.0)
     aws-sdk-core (3.171.0)
       aws-eventstream (~> 1, >= 1.0.2)
       aws-partitions (~> 1, >= 1.651.0)
@@ -118,7 +130,7 @@ GEM
     aws-sdk-kms (1.63.0)
       aws-sdk-core (~> 3, >= 3.165.0)
       aws-sigv4 (~> 1.1)
-    aws-sdk-s3 (1.120.1)
+    aws-sdk-s3 (1.121.0)
       aws-sdk-core (~> 3, >= 3.165.0)
       aws-sdk-kms (~> 1)
       aws-sigv4 (~> 1.4)
@@ -142,7 +154,7 @@ GEM
     blurhash (0.1.7)
     bootsnap (1.16.0)
       msgpack (~> 1.2)
-    brakeman (5.4.0)
+    brakeman (5.4.1)
     browser (5.3.1)
     brpoplpush-redis_script (0.1.3)
       concurrent-ruby (~> 1.0, >= 1.0.5)
@@ -156,7 +168,7 @@ GEM
       i18n
       rake (>= 10.0.0)
       sshkit (>= 1.9.0)
-    capistrano-bundler (2.0.1)
+    capistrano-bundler (2.1.0)
       capistrano (~> 3.1)
     capistrano-rails (1.6.2)
       capistrano (~> 3.1)
@@ -179,7 +191,7 @@ GEM
       activesupport
     cbor (0.5.9.6)
     charlock_holmes (0.7.7)
-    chewy (7.3.0)
+    chewy (7.3.2)
       activesupport (>= 5.2)
       elasticsearch (>= 7.12.0, < 7.14.0)
       elasticsearch-dsl
@@ -189,29 +201,23 @@ GEM
     coderay (1.1.3)
     color_diff (0.1)
     concurrent-ruby (1.2.2)
-    connection_pool (2.3.0)
+    connection_pool (2.4.0)
     cose (1.3.0)
       cbor (~> 0.5.9)
       openssl-signature_algorithm (~> 1.0)
     crack (0.4.5)
       rexml
     crass (1.0.6)
-    css_parser (1.12.0)
+    css_parser (1.14.0)
       addressable
     date (3.3.3)
-    debug_inspector (1.0.0)
+    debug_inspector (1.1.0)
     devise (4.9.2)
       bcrypt (~> 3.0)
       orm_adapter (~> 0.1)
       railties (>= 4.1.0)
       responders
       warden (~> 1.2.3)
-    devise-two-factor (4.0.2)
-      activesupport (< 7.1)
-      attr_encrypted (>= 1.3, < 4, != 2)
-      devise (~> 4.0)
-      railties (< 7.1)
-      rotp (~> 6.0)
     devise_pam_authenticatable2 (9.2.0)
       devise (>= 4.0.0)
       rpam2 (~> 4.0)
@@ -241,7 +247,7 @@ GEM
     erubi (1.12.0)
     et-orbi (1.2.7)
       tzinfo
-    excon (0.95.0)
+    excon (0.99.0)
     fabrication (2.30.0)
     faker (3.2.0)
       i18n (>= 1.8.11, < 2)
@@ -314,7 +320,7 @@ GEM
     hashie (5.0.0)
     hcaptcha (7.1.0)
       json
-    highline (2.0.3)
+    highline (2.1.0)
     hiredis (0.6.3)
     hkdf (0.3.0)
     htmlentities (4.3.4)
@@ -364,7 +370,7 @@ GEM
     json-ld-preloaded (3.2.2)
       json-ld (~> 3.2)
       rdf (~> 3.2)
-    json-schema (3.0.0)
+    json-schema (4.0.0)
       addressable (>= 2.8)
     jsonapi-renderer (0.2.2)
     jwt (2.7.0)
@@ -380,8 +386,8 @@ GEM
       activerecord
       kaminari-core (= 1.2.2)
     kaminari-core (1.2.2)
-    launchy (2.5.0)
+    launchy (2.5.2)
-      addressable (~> 2.7)
+      addressable (~> 2.8)
     letter_opener (1.8.1)
       launchy (>= 2.2, < 3)
     letter_opener_web (2.0.0)
@@ -416,11 +422,11 @@ GEM
     method_source (1.0.0)
     mime-types (3.4.1)
       mime-types-data (~> 3.2015)
-    mime-types-data (3.2022.0105)
+    mime-types-data (3.2023.0218.1)
     mini_mime (1.1.2)
     mini_portile2 (2.8.1)
     minitest (5.18.0)
-    msgpack (1.6.0)
+    msgpack (1.7.0)
     multi_json (1.15.0)
     multipart-post (2.3.0)
     net-http (0.3.2)
@@ -437,7 +443,7 @@ GEM
       net-ssh (>= 2.6.5, < 8.0.0)
     net-smtp (0.3.3)
       net-protocol
-    net-ssh (7.0.1)
+    net-ssh (7.1.0)
     nio4r (2.5.9)
     nokogiri (1.14.3)
       mini_portile2 (~> 2.8.0)
@@ -480,18 +486,18 @@ GEM
       openssl (> 2.0)
     orm_adapter (0.5.0)
     ox (2.14.16)
-    parallel (1.22.1)
+    parallel (1.23.0)
-    parser (3.2.2.0)
+    parser (3.2.2.1)
       ast (~> 2.4.1)
     parslet (2.0.0)
     pastel (0.8.0)
       tty-color (~> 0.5)
-    pg (1.4.6)
+    pg (1.5.2)
-    pghero (3.3.2)
+    pghero (3.3.3)
       activerecord (>= 6)
     pkg-config (1.5.1)
     posix-spawn (0.3.15)
-    premailer (1.18.0)
+    premailer (1.21.0)
       addressable
       css_parser (>= 1.12.0)
       htmlentities (>= 4.0.0)
@@ -501,13 +507,13 @@ GEM
       premailer (~> 1.7, >= 1.7.9)
     private_address_check (0.5.0)
     public_suffix (5.0.1)
-    puma (6.2.1)
+    puma (6.2.2)
       nio4r (~> 2.0)
     pundit (2.3.0)
       activesupport (>= 3.0.0)
     raabro (1.4.0)
     racc (1.6.2)
-    rack (2.2.6.4)
+    rack (2.2.7)
     rack-attack (6.6.1)
       rack (>= 1.0, < 3)
     rack-cors (2.0.1)
@@ -567,25 +573,25 @@ GEM
       redis (>= 4)
     redlock (1.3.2)
       redis (>= 3.0.0, < 6.0)
-    regexp_parser (2.7.0)
+    regexp_parser (2.8.0)
     request_store (1.5.1)
       rack (>= 1.4)
     responders (3.1.0)
       actionpack (>= 5.2)
       railties (>= 5.2)
     rexml (3.2.5)
-    rotp (6.2.0)
+    rotp (6.2.2)
     rpam2 (4.0.2)
     rqrcode (2.1.2)
       chunky_png (~> 1.0)
       rqrcode_core (~> 1.0)
     rqrcode_core (1.2.0)
-    rspec-core (3.12.1)
+    rspec-core (3.12.2)
       rspec-support (~> 3.12.0)
-    rspec-expectations (3.12.2)
+    rspec-expectations (3.12.3)
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.12.0)
-    rspec-mocks (3.12.3)
+    rspec-mocks (3.12.5)
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.12.0)
     rspec-rails (6.0.1)
@@ -603,7 +609,7 @@ GEM
     rspec_chunked (0.6)
     rspec_junit_formatter (0.6.0)
       rspec-core (>= 2, < 4, != 2.12.0)
-    rubocop (1.49.0)
+    rubocop (1.50.2)
       json (~> 2.3)
       parallel (~> 1.10)
       parser (>= 3.2.0.0)
@@ -615,7 +621,7 @@ GEM
       unicode-display_width (>= 2.4.0, < 3.0)
     rubocop-ast (1.28.0)
       parser (>= 3.2.1.0)
-    rubocop-capybara (2.17.1)
+    rubocop-capybara (2.18.0)
       rubocop (~> 1.41)
     rubocop-performance (1.17.1)
       rubocop (>= 1.7.0, < 2.0)
@@ -771,6 +777,7 @@ DEPENDENCIES
   active_model_serializers (~> 0.10)
   addressable (~> 2.8)
   annotate (~> 3.2)
+  attr_encrypted (~> 4.0)
   aws-sdk-s3 (~> 1.120)
   better_errors (~> 2.9)
   binding_of_caller (~> 1.0)
@@ -792,7 +799,7 @@ DEPENDENCIES
   concurrent-ruby
   connection_pool
   devise (~> 4.9)
-  devise-two-factor (~> 4.0)
+  devise-two-factor!
   devise_pam_authenticatable2 (~> 9.2)
   discard (~> 1.2)
   doorkeeper (~> 5.6)
@@ -817,7 +824,7 @@ DEPENDENCIES
   idn-ruby
   json-ld
   json-ld-preloaded (~> 3.2)
-  json-schema (~> 3.0)
+  json-schema (~> 4.0)
   kaminari (~> 1.2)
   kt-paperclip (~> 7.1)!
   letter_opener (~> 1.8)
@@ -840,7 +847,7 @@ DEPENDENCIES
   omniauth_openid_connect (~> 0.6.1)
   ox (~> 2.14)
   parslet
-  pg (~> 1.4)
+  pg (~> 1.5)
   pghero
   pkg-config (~> 1.5)
   posix-spawn
@@ -849,7 +856,7 @@ DEPENDENCIES
   public_suffix (~> 5.0)
   puma (~> 6.2)
   pundit (~> 2.3)
-  rack (~> 2.2.6)
+  rack (~> 2.2.7)
   rack-attack (~> 6.6)
   rack-cors (~> 2.0)
   rack-test (~> 2.1)
@@ -871,7 +878,7 @@ DEPENDENCIES
   rubocop-performance
   rubocop-rails
   rubocop-rspec
-  ruby-progressbar (~> 1.11)
+  ruby-progressbar (~> 1.13)
   sanitize (~> 6.0)
   scenic (~> 1.7)
   sidekiq (~> 6.5)

app/controllers/about_controller.rb

@@ -8,7 +8,7 @@ class AboutController < ApplicationController
   before_action :set_instance_presenter
 
   def show
-    expires_in 0, public: true unless user_signed_in?
+    expires_in(15.seconds, public: true, stale_while_revalidate: 30.seconds, stale_if_error: 1.day) unless user_signed_in?
   end
 
   private

app/controllers/accounts_controller.rb

@@ -7,8 +7,9 @@ class AccountsController < ApplicationController
   include AccountControllerConcern
   include SignatureAuthentication
 
+  vary_by -> { public_fetch_mode? ? 'Accept, Accept-Language, Cookie' : 'Accept, Accept-Language, Cookie, Signature' }
+
   before_action :require_account_signature!, if: -> { request.format == :json && authorized_fetch_mode? }
-  before_action :set_cache_headers
 
   skip_around_action :set_locale, if: -> { [:json, :rss].include?(request.format&.to_sym) }
   skip_before_action :require_functional!, unless: :whitelist_mode?
@@ -16,7 +17,7 @@ class AccountsController < ApplicationController
   def show
     respond_to do |format|
       format.html do
-        expires_in 0, public: true unless user_signed_in?
+        expires_in(15.seconds, public: true, stale_while_revalidate: 30.seconds, stale_if_error: 1.hour) unless user_signed_in?
 
         @rss_url = rss_url
       end

app/controllers/activitypub/base_controller.rb

@@ -7,10 +7,6 @@ class ActivityPub::BaseController < Api::BaseController
 
   private
 
-  def set_cache_headers
-    response.headers['Vary'] = 'Signature' if authorized_fetch_mode?
-  end
-
   def skip_temporary_suspension_response?
     false
   end

app/controllers/activitypub/collections_controller.rb

@@ -4,11 +4,12 @@ class ActivityPub::CollectionsController < ActivityPub::BaseController
   include SignatureVerification
   include AccountOwnedConcern
 
+  vary_by -> { 'Signature' if authorized_fetch_mode? }
+
   before_action :require_account_signature!, if: :authorized_fetch_mode?
   before_action :set_items
   before_action :set_size
   before_action :set_type
-  before_action :set_cache_headers
 
   def show
     expires_in 3.minutes, public: public_fetch_mode?

app/controllers/activitypub/followers_synchronizations_controller.rb

@@ -4,9 +4,10 @@ class ActivityPub::FollowersSynchronizationsController < ActivityPub::BaseContro
   include SignatureVerification
   include AccountOwnedConcern
 
+  vary_by -> { 'Signature' if authorized_fetch_mode? }
+
   before_action :require_account_signature!
   before_action :set_items
-  before_action :set_cache_headers
 
   def show
     expires_in 0, public: false

app/controllers/activitypub/outboxes_controller.rb

@@ -6,9 +6,10 @@ class ActivityPub::OutboxesController < ActivityPub::BaseController
   include SignatureVerification
   include AccountOwnedConcern
 
+  vary_by -> { 'Signature' if authorized_fetch_mode? || page_requested? }
+
   before_action :require_account_signature!, if: :authorized_fetch_mode?
   before_action :set_statuses
-  before_action :set_cache_headers
 
   def show
     if page_requested?
@@ -16,6 +17,7 @@ class ActivityPub::OutboxesController < ActivityPub::BaseController
     else
       expires_in(3.minutes, public: public_fetch_mode?)
     end
+
     render json: outbox_presenter, serializer: ActivityPub::OutboxSerializer, adapter: ActivityPub::Adapter, content_type: 'application/activity+json'
   end
 
@@ -80,8 +82,4 @@ class ActivityPub::OutboxesController < ActivityPub::BaseController
   def set_account
     @account = params[:account_username].present? ? Account.find_local!(username_param) : Account.representative
   end
-
-  def set_cache_headers
-    response.headers['Vary'] = 'Signature' if authorized_fetch_mode? || page_requested?
-  end
 end

app/controllers/activitypub/replies_controller.rb

@@ -7,9 +7,10 @@ class ActivityPub::RepliesController < ActivityPub::BaseController
 
   DESCENDANTS_LIMIT = 60
 
+  vary_by -> { 'Signature' if authorized_fetch_mode? }
+
   before_action :require_account_signature!, if: :authorized_fetch_mode?
   before_action :set_status
-  before_action :set_cache_headers
   before_action :set_replies
 
   def index

app/controllers/admin/base_controller.rb

@@ -9,6 +9,8 @@ module Admin
 
     before_action :set_pack
     before_action :set_body_classes
+    before_action :set_cache_headers
+
     after_action :verify_authorized
 
     private
@@ -21,6 +23,10 @@ module Admin
       use_pack 'admin'
     end
 
+    def set_cache_headers
+      response.cache_control.replace(private: true, no_store: true)
+    end
+
     def set_user
       @user = Account.find(params[:account_id]).user || raise(ActiveRecord::RecordNotFound)
     end

app/controllers/api/base_controller.rb

@@ -6,13 +6,14 @@ class Api::BaseController < ApplicationController
 
   include RateLimitHeaders
   include AccessTokenTrackingConcern
+  include ApiCachingConcern
 
-  skip_before_action :store_current_location
   skip_before_action :require_functional!, unless: :whitelist_mode?
 
   before_action :require_authenticated_user!, if: :disallow_unauthenticated_api_access?
   before_action :require_not_suspended!
-  before_action :set_cache_headers
+
+  vary_by 'Authorization'
 
   protect_from_forgery with: :null_session
 
@@ -148,10 +149,6 @@ class Api::BaseController < ApplicationController
     doorkeeper_authorize!(*scopes) if doorkeeper_token
   end
 
-  def set_cache_headers
-    response.headers['Cache-Control'] = 'private, no-store'
-  end
-
   def disallow_unauthenticated_api_access?
     ENV['DISALLOW_UNAUTHENTICATED_API_ACCESS'] == 'true' || Rails.configuration.x.whitelist_mode
   end

app/controllers/api/v1/accounts/follower_accounts_controller.rb

@@ -6,6 +6,7 @@ class Api::V1::Accounts::FollowerAccountsController < Api::BaseController
   after_action :insert_pagination_headers
 
   def index
+    cache_if_unauthenticated!
     @accounts = load_accounts
     render json: @accounts, each_serializer: REST::AccountSerializer
   end

app/controllers/api/v1/accounts/following_accounts_controller.rb

@@ -6,6 +6,7 @@ class Api::V1::Accounts::FollowingAccountsController < Api::BaseController
   after_action :insert_pagination_headers
 
   def index
+    cache_if_unauthenticated!
     @accounts = load_accounts
     render json: @accounts, each_serializer: REST::AccountSerializer
   end

app/controllers/api/v1/accounts/lookup_controller.rb

@@ -5,6 +5,7 @@ class Api::V1::Accounts::LookupController < Api::BaseController
   before_action :set_account
 
   def show
+    cache_if_unauthenticated!
     render json: @account, serializer: REST::AccountSerializer
   end
 

app/controllers/api/v1/accounts/statuses_controller.rb

@@ -7,6 +7,7 @@ class Api::V1::Accounts::StatusesController < Api::BaseController
   after_action :insert_pagination_headers, unless: -> { truthy_param?(:pinned) }
 
   def index
+    cache_if_unauthenticated!
     @statuses = load_statuses
     render json: @statuses, each_serializer: REST::StatusSerializer, relationships: StatusRelationshipsPresenter.new(@statuses, current_user&.account_id)
   end

app/controllers/api/v1/accounts_controller.rb

@@ -18,6 +18,7 @@ class Api::V1::AccountsController < Api::BaseController
   override_rate_limit_headers :follow, family: :follows
 
   def show
+    cache_if_unauthenticated!
     render json: @account, serializer: REST::AccountSerializer
   end
 

app/controllers/api/v1/custom_emojis_controller.rb

@@ -1,10 +1,10 @@
 # frozen_string_literal: true
 
 class Api::V1::CustomEmojisController < Api::BaseController
-  skip_before_action :set_cache_headers
+  vary_by '', unless: :disallow_unauthenticated_api_access?
 
   def index
-    expires_in 3.minutes, public: true
+    cache_even_if_authenticated! unless disallow_unauthenticated_api_access?
     render_with_cache(each_serializer: REST::CustomEmojiSerializer) { CustomEmoji.listed.includes(:category) }
   end
 end

app/controllers/api/v1/directories_controller.rb

@@ -5,6 +5,7 @@ class Api::V1::DirectoriesController < Api::BaseController
   before_action :set_accounts
 
   def show
+    cache_if_unauthenticated!
     render json: @accounts, each_serializer: REST::AccountSerializer
   end
 

app/controllers/api/v1/instances/activity_controller.rb

@@ -3,11 +3,12 @@
 class Api::V1::Instances::ActivityController < Api::BaseController
   before_action :require_enabled_api!
 
-  skip_before_action :set_cache_headers
   skip_before_action :require_authenticated_user!, unless: :whitelist_mode?
 
+  vary_by ''
+
   def show
-    expires_in 1.day, public: true
+    cache_even_if_authenticated!
     render_with_cache json: :activity, expires_in: 1.day
   end
 

app/controllers/api/v1/instances/domain_blocks_controller.rb

@@ -6,8 +6,15 @@ class Api::V1::Instances::DomainBlocksController < Api::BaseController
   before_action :require_enabled_api!
   before_action :set_domain_blocks
 
+  vary_by '', if: -> { Setting.show_domain_blocks == 'all' }
+
   def index
-    expires_in 3.minutes, public: true
+    if Setting.show_domain_blocks == 'all'
+      cache_even_if_authenticated!
+    else
+      cache_if_unauthenticated!
+    end
+
     render json: @domain_blocks, each_serializer: REST::DomainBlockSerializer, with_comment: (Setting.show_domain_blocks_rationale == 'all' || (Setting.show_domain_blocks_rationale == 'users' && user_signed_in?))
   end
 

app/controllers/api/v1/instances/extended_descriptions_controller.rb

@@ -2,11 +2,19 @@
 
 class Api::V1::Instances::ExtendedDescriptionsController < Api::BaseController
   skip_before_action :require_authenticated_user!, unless: :whitelist_mode?
+  skip_around_action :set_locale
 
   before_action :set_extended_description
 
+  vary_by ''
+
+  # Override `current_user` to avoid reading session cookies unless in whitelist mode
+  def current_user
+    super if whitelist_mode?
+  end
+
   def show
-    expires_in 3.minutes, public: true
+    cache_even_if_authenticated!
     render json: @extended_description, serializer: REST::ExtendedDescriptionSerializer
   end
 

app/controllers/api/v1/instances/peers_controller.rb

@@ -3,11 +3,18 @@
 class Api::V1::Instances::PeersController < Api::BaseController
   before_action :require_enabled_api!
 
-  skip_before_action :set_cache_headers
   skip_before_action :require_authenticated_user!, unless: :whitelist_mode?
+  skip_around_action :set_locale
+
+  vary_by ''
+
+  # Override `current_user` to avoid reading session cookies unless in whitelist mode
+  def current_user
+    super if whitelist_mode?
+  end
 
   def index
-    expires_in 1.day, public: true
+    cache_even_if_authenticated!
     render_with_cache(expires_in: 1.day) { Instance.where.not(domain: DomainBlock.select(:domain)).pluck(:domain) }
   end
 

app/controllers/api/v1/instances/privacy_policies_controller.rb

@@ -5,8 +5,10 @@ class Api::V1::Instances::PrivacyPoliciesController < Api::BaseController
 
   before_action :set_privacy_policy
 
+  vary_by ''
+
   def show
-    expires_in 1.day, public: true
+    cache_even_if_authenticated!
     render json: @privacy_policy, serializer: REST::PrivacyPolicySerializer
   end
 

app/controllers/api/v1/instances/rules_controller.rb

@@ -2,10 +2,19 @@
 
 class Api::V1::Instances::RulesController < Api::BaseController
   skip_before_action :require_authenticated_user!, unless: :whitelist_mode?
+  skip_around_action :set_locale
 
   before_action :set_rules
 
+  vary_by ''
+
+  # Override `current_user` to avoid reading session cookies unless in whitelist mode
+  def current_user
+    super if whitelist_mode?
+  end
+
   def index
+    cache_even_if_authenticated!
     render json: @rules, each_serializer: REST::RuleSerializer
   end
 

app/controllers/api/v1/instances/translation_languages_controller.rb

@@ -5,8 +5,10 @@ class Api::V1::Instances::TranslationLanguagesController < Api::BaseController
 
   before_action :set_languages
 
+  vary_by ''
+
   def show
-    expires_in 1.day, public: true
+    cache_even_if_authenticated!
     render json: @languages
   end
 

app/controllers/api/v1/instances_controller.rb

@@ -1,11 +1,18 @@
 # frozen_string_literal: true
 
 class Api::V1::InstancesController < Api::BaseController
-  skip_before_action :set_cache_headers
   skip_before_action :require_authenticated_user!, unless: :whitelist_mode?
+  skip_around_action :set_locale
+
+  vary_by ''
+
+  # Override `current_user` to avoid reading session cookies unless in whitelist mode
+  def current_user
+    super if whitelist_mode?
+  end
 
   def show
-    expires_in 3.minutes, public: true
+    cache_even_if_authenticated!
     render_with_cache json: InstancePresenter.new, serializer: REST::V1::InstanceSerializer, root: 'instance'
   end
 end

app/controllers/api/v1/polls_controller.rb

@@ -8,6 +8,7 @@ class Api::V1::PollsController < Api::BaseController
   before_action :refresh_poll
 
   def show
+    cache_if_unauthenticated!
     render json: @poll, serializer: REST::PollSerializer, include_results: true
   end
 

app/controllers/api/v1/statuses/favourited_by_accounts_controller.rb

@@ -8,6 +8,7 @@ class Api::V1::Statuses::FavouritedByAccountsController < Api::BaseController
   after_action :insert_pagination_headers
 
   def index
+    cache_if_unauthenticated!
     @accounts = load_accounts
     render json: @accounts, each_serializer: REST::AccountSerializer
   end

app/controllers/api/v1/statuses/histories_controller.rb

@@ -7,6 +7,7 @@ class Api::V1::Statuses::HistoriesController < Api::BaseController
   before_action :set_status
 
   def show
+    cache_if_unauthenticated!
     render json: @status.edits.includes(:account, status: [:account]), each_serializer: REST::StatusEditSerializer
   end
 

app/controllers/api/v1/statuses/reblogged_by_accounts_controller.rb

@@ -8,6 +8,7 @@ class Api::V1::Statuses::RebloggedByAccountsController < Api::BaseController
   after_action :insert_pagination_headers
 
   def index
+    cache_if_unauthenticated!
     @accounts = load_accounts
     render json: @accounts, each_serializer: REST::AccountSerializer
   end

app/controllers/api/v1/statuses_controller.rb

@@ -24,11 +24,14 @@ class Api::V1::StatusesController < Api::BaseController
   DESCENDANTS_DEPTH_LIMIT = 20
 
   def show
+    cache_if_unauthenticated!
     @status = cache_collection([@status], Status).first
     render json: @status, serializer: REST::StatusSerializer
   end
 
   def context
+    cache_if_unauthenticated!
+
     ancestors_limit         = CONTEXT_LIMIT
     descendants_limit       = CONTEXT_LIMIT
     descendants_depth_limit = nil

app/controllers/api/v1/tags_controller.rb

@@ -8,6 +8,7 @@ class Api::V1::TagsController < Api::BaseController
   override_rate_limit_headers :follow, family: :follows
 
   def show
+    cache_if_unauthenticated!
     render json: @tag, serializer: REST::TagSerializer
   end
 

app/controllers/api/v1/timelines/public_controller.rb

@@ -5,6 +5,7 @@ class Api::V1::Timelines::PublicController < Api::BaseController
   after_action :insert_pagination_headers, unless: -> { @statuses.empty? }
 
   def show
+    cache_if_unauthenticated!
     @statuses = load_statuses
     render json: @statuses, each_serializer: REST::StatusSerializer, relationships: StatusRelationshipsPresenter.new(@statuses, current_user&.account_id)
   end

app/controllers/api/v1/timelines/tag_controller.rb

@@ -5,6 +5,7 @@ class Api::V1::Timelines::TagController < Api::BaseController
   after_action :insert_pagination_headers, unless: -> { @statuses.empty? }
 
   def show
+    cache_if_unauthenticated!
     @statuses = load_statuses
     render json: @statuses, each_serializer: REST::StatusSerializer, relationships: StatusRelationshipsPresenter.new(@statuses, current_user&.account_id)
   end

app/controllers/api/v1/trends/links_controller.rb

@@ -1,6 +1,8 @@
 # frozen_string_literal: true
 
 class Api::V1::Trends::LinksController < Api::BaseController
+  vary_by 'Authorization, Accept-Language'
+
   before_action :set_links
 
   after_action :insert_pagination_headers
@@ -8,6 +10,7 @@ class Api::V1::Trends::LinksController < Api::BaseController
   DEFAULT_LINKS_LIMIT = 10
 
   def index
+    cache_if_unauthenticated!
     render json: @links, each_serializer: REST::Trends::LinkSerializer
   end
 

app/controllers/api/v1/trends/statuses_controller.rb

@@ -1,11 +1,14 @@
 # frozen_string_literal: true
 
 class Api::V1::Trends::StatusesController < Api::BaseController
+  vary_by 'Authorization, Accept-Language'
+
   before_action :set_statuses
 
   after_action :insert_pagination_headers
 
   def index
+    cache_if_unauthenticated!
     render json: @statuses, each_serializer: REST::StatusSerializer
   end
 

app/controllers/api/v1/trends/tags_controller.rb

@@ -8,6 +8,7 @@ class Api::V1::Trends::TagsController < Api::BaseController
   DEFAULT_TAGS_LIMIT = (ENV['MAX_TRENDING_TAGS'] || 10).to_i
 
   def index
+    cache_if_unauthenticated!
     render json: @tags, each_serializer: REST::TagSerializer, relationships: TagRelationshipsPresenter.new(@tags, current_user&.account_id)
   end
 

app/controllers/api/v2/instances_controller.rb

@@ -2,7 +2,7 @@
 
 class Api::V2::InstancesController < Api::V1::InstancesController
   def show
-    expires_in 3.minutes, public: true
+    cache_even_if_authenticated!
     render_with_cache json: InstancePresenter.new, serializer: REST::InstanceSerializer, root: 'instance'
   end
 end

app/controllers/application_controller.rb

@@ -21,6 +21,8 @@ class ApplicationController < ActionController::Base
   helper_method :omniauth_only?
   helper_method :sso_account_settings
   helper_method :whitelist_mode?
+  helper_method :body_class_string
+  helper_method :skip_csrf_meta_tags?
 
   rescue_from ActionController::ParameterMissing, Paperclip::AdapterRegistry::NoHandlerError, with: :bad_request
   rescue_from Mastodon::NotPermittedError, with: :forbidden
@@ -37,9 +39,11 @@ class ApplicationController < ActionController::Base
     service_unavailable
   end
 
-  before_action :store_current_location, except: :raise_not_found, unless: :devise_controller?
+  before_action :store_referrer, except: :raise_not_found, if: :devise_controller?
   before_action :require_functional!, if: :user_signed_in?
 
+  before_action :set_cache_control_defaults
+
   skip_before_action :verify_authenticity_token, only: :raise_not_found
 
   def raise_not_found
@@ -56,14 +60,25 @@ class ApplicationController < ActionController::Base
     !authorized_fetch_mode?
   end
 
-  def store_current_location
+  def store_referrer
-    store_location_for(:user, request.url) unless [:json, :rss].include?(request.format&.to_sym)
+    return if request.referer.blank?
+
+    redirect_uri = URI(request.referer)
+    return if redirect_uri.path.start_with?('/auth')
+
+    stored_url = redirect_uri.to_s if redirect_uri.host == request.host && redirect_uri.port == request.port
+
+    store_location_for(:user, stored_url)
   end
 
   def require_functional!
     redirect_to edit_user_registration_path unless current_user.functional?
   end
 
+  def skip_csrf_meta_tags?
+    false
+  end
+
   def after_sign_out_path_for(_resource_or_scope)
     if ENV['OMNIAUTH_ONLY'] == 'true' && ENV['OIDC_ENABLED'] == 'true'
       '/auth/auth/openid_connect/logout'
@@ -127,7 +142,7 @@ class ApplicationController < ActionController::Base
   end
 
   def sso_account_settings
-    ENV.fetch('SSO_ACCOUNT_SETTINGS')
+    ENV.fetch('SSO_ACCOUNT_SETTINGS', nil)
   end
 
   def current_account
@@ -142,6 +157,10 @@ class ApplicationController < ActionController::Base
     @current_session = SessionActivation.find_by(session_id: cookies.signed['_session_id']) if cookies.signed['_session_id'].present?
   end
 
+  def body_class_string
+    @body_classes || ''
+  end
+
   def respond_with_error(code)
     respond_to do |format|
       format.any do
@@ -151,4 +170,8 @@ class ApplicationController < ActionController::Base
       format.json { render json: { error: Rack::Utils::HTTP_STATUS_CODES[code] }, status: code }
     end
   end
+
+  def set_cache_control_defaults
+    response.cache_control.replace(private: true, no_store: true)
+  end
 end

app/controllers/auth/registrations_controller.rb

@@ -157,6 +157,6 @@ class Auth::RegistrationsController < Devise::RegistrationsController
   end
 
   def set_cache_headers
-    response.headers['Cache-Control'] = 'private, no-store'
+    response.cache_control.replace(private: true, no_store: true)
   end
 end

app/controllers/concerns/api_caching_concern.rb

@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+module ApiCachingConcern
+  extend ActiveSupport::Concern
+
+  def cache_if_unauthenticated!
+    expires_in(15.seconds, public: true, stale_while_revalidate: 30.seconds, stale_if_error: 1.day) unless user_signed_in?
+  end
+
+  def cache_even_if_authenticated!
+    expires_in(5.minutes, public: true, stale_while_revalidate: 30.seconds, stale_if_error: 1.day) unless whitelist_mode?
+  end
+end

app/controllers/concerns/cache_concern.rb

@@ -155,8 +155,30 @@ module CacheConcern
     end
   end
 
+  class_methods do
+    def vary_by(value, **kwargs)
+      before_action(**kwargs) do |controller|
+        response.headers['Vary'] = value.respond_to?(:call) ? controller.instance_exec(&value) : value
+      end
+    end
+  end
+
+  included do
+    after_action :enforce_cache_control!
+  end
+
+  # Prevents high-entropy headers such as `Cookie`, `Signature` or `Authorization`
+  # from being used as cache keys, while allowing to `Vary` on them (to not serve
+  # anonymous cached data to authenticated requests when authentication matters)
+  def enforce_cache_control!
+    vary = response.headers['Vary']&.split&.map { |x| x.strip.downcase }
+    return unless vary.present? && %w(cookie authorization signature).any? { |header| vary.include?(header) && request.headers[header].present? }
+
+    response.cache_control.replace(private: true, no_store: true)
+  end
+
   def render_with_cache(**options)
-    raise ArgumentError, 'only JSON render calls are supported' unless options.key?(:json) || block_given?
+    raise ArgumentError, 'Only JSON render calls are supported' unless options.key?(:json) || block_given?
 
     key        = options.delete(:key) || [[params[:controller], params[:action]].join('/'), options[:json].respond_to?(:cache_key) ? options[:json].cache_key : nil, options[:fields].nil? ? nil : options[:fields].join(',')].compact.join(':')
     expires_in = options.delete(:expires_in) || 3.minutes
@@ -176,10 +198,6 @@ module CacheConcern
     end
   end
 
-  def set_cache_headers
-    response.headers['Vary'] = public_fetch_mode? ? 'Accept' : 'Accept, Signature'
-  end
-
   def cache_collection(raw, klass)
     return raw unless klass.respond_to?(:with_includes)
 

app/controllers/concerns/web_app_controller_concern.rb

@@ -7,6 +7,12 @@ module WebAppControllerConcern
     prepend_before_action :redirect_unauthenticated_to_permalinks!
     before_action :set_pack
     before_action :set_app_body_class
+
+    vary_by 'Accept, Accept-Language, Cookie'
+  end
+
+  def skip_csrf_meta_tags?
+    current_user.nil?
   end
 
   def set_app_body_class

app/controllers/custom_css_controller.rb

@@ -1,18 +1,8 @@
 # frozen_string_literal: true
 
-class CustomCssController < ApplicationController
+class CustomCssController < ActionController::Base # rubocop:disable Rails/ApplicationController
-  skip_before_action :store_current_location
-  skip_before_action :require_functional!
-  skip_before_action :update_user_sign_in
-  skip_before_action :set_session_activity
-
-  skip_around_action :set_locale
-
-  before_action :set_cache_headers
-
   def show
     expires_in 3.minutes, public: true
-    request.session_options[:skip] = true
     render content_type: 'text/css'
   end
 end

app/controllers/disputes/base_controller.rb

@@ -10,6 +10,7 @@ class Disputes::BaseController < ApplicationController
   before_action :set_body_classes
   before_action :authenticate_user!
   before_action :set_pack
+  before_action :set_cache_headers
 
   private
 
@@ -20,4 +21,8 @@ class Disputes::BaseController < ApplicationController
   def set_body_classes
     @body_classes = 'admin'
   end
+
+  def set_cache_headers
+    response.cache_control.replace(private: true, no_store: true)
+  end
 end

app/controllers/emojis_controller.rb

@@ -2,16 +2,13 @@
 
 class EmojisController < ApplicationController
   before_action :set_emoji
-  before_action :set_cache_headers
+
+  vary_by -> { 'Signature' if authorized_fetch_mode? }
 
   def show
-    respond_to do |format|
-      format.json do
     expires_in 3.minutes, public: true
     render_with_cache json: @emoji, content_type: 'application/activity+json', serializer: ActivityPub::EmojiSerializer, adapter: ActivityPub::Adapter
   end
-    end
-  end
 
   private
 

app/controllers/filters/statuses_controller.rb

@@ -8,6 +8,7 @@ class Filters::StatusesController < ApplicationController
   before_action :set_status_filters
   before_action :set_pack
   before_action :set_body_classes
+  before_action :set_cache_headers
 
   PER_PAGE = 20
 
@@ -49,4 +50,8 @@ class Filters::StatusesController < ApplicationController
   def set_body_classes
     @body_classes = 'admin'
   end
+
+  def set_cache_headers
+    response.cache_control.replace(private: true, no_store: true)
+  end
 end

app/controllers/filters_controller.rb

@@ -7,6 +7,7 @@ class FiltersController < ApplicationController
   before_action :set_filter, only: [:edit, :update, :destroy]
   before_action :set_pack
   before_action :set_body_classes
+  before_action :set_cache_headers
 
   def index
     @filters = current_account.custom_filters.includes(:keywords, :statuses).order(:phrase)
@@ -59,4 +60,8 @@ class FiltersController < ApplicationController
   def set_body_classes
     @body_classes = 'admin'
   end
+
+  def set_cache_headers
+    response.cache_control.replace(private: true, no_store: true)
+  end
 end

app/controllers/follower_accounts_controller.rb

@@ -5,8 +5,9 @@ class FollowerAccountsController < ApplicationController
   include SignatureVerification
   include WebAppControllerConcern
 
+  vary_by -> { public_fetch_mode? ? 'Accept, Accept-Language, Cookie' : 'Accept, Accept-Language, Cookie, Signature' }
+
   before_action :require_account_signature!, if: -> { request.format == :json && authorized_fetch_mode? }
-  before_action :set_cache_headers
 
   skip_around_action :set_locale, if: -> { request.format == :json }
   skip_before_action :require_functional!, unless: :whitelist_mode?
@@ -14,7 +15,7 @@ class FollowerAccountsController < ApplicationController
   def index
     respond_to do |format|
       format.html do
-        expires_in 0, public: true unless user_signed_in?
+        expires_in(15.seconds, public: true, stale_while_revalidate: 30.seconds, stale_if_error: 1.hour) unless user_signed_in?
       end
 
       format.json do

app/controllers/following_accounts_controller.rb

@@ -5,8 +5,9 @@ class FollowingAccountsController < ApplicationController
   include SignatureVerification
   include WebAppControllerConcern
 
+  vary_by -> { public_fetch_mode? ? 'Accept, Accept-Language, Cookie' : 'Accept, Accept-Language, Cookie, Signature' }
+
   before_action :require_account_signature!, if: -> { request.format == :json && authorized_fetch_mode? }
-  before_action :set_cache_headers
 
   skip_around_action :set_locale, if: -> { request.format == :json }
   skip_before_action :require_functional!, unless: :whitelist_mode?
@@ -14,7 +15,7 @@ class FollowingAccountsController < ApplicationController
   def index
     respond_to do |format|
       format.html do
-        expires_in 0, public: true unless user_signed_in?
+        expires_in(15.seconds, public: true, stale_while_revalidate: 30.seconds, stale_if_error: 1.hour) unless user_signed_in?
       end
 
       format.json do

app/controllers/home_controller.rb

@@ -6,7 +6,7 @@ class HomeController < ApplicationController
   before_action :set_instance_presenter
 
   def index
-    expires_in 0, public: true unless user_signed_in?
+    expires_in(15.seconds, public: true, stale_while_revalidate: 30.seconds, stale_if_error: 1.day) unless user_signed_in?
   end
 
   private

app/controllers/instance_actors_controller.rb

@@ -1,10 +1,13 @@
 # frozen_string_literal: true
 
-class InstanceActorsController < ApplicationController
+class InstanceActorsController < ActivityPub::BaseController
-  include AccountControllerConcern
+  vary_by ''
 
-  skip_before_action :check_account_confirmation
+  serialization_scope nil
-  skip_around_action :set_locale
+
+  before_action :set_account
+  skip_before_action :require_functional!
+  skip_before_action :update_user_sign_in
 
   def show
     expires_in 10.minutes, public: true

app/controllers/invites_controller.rb

@@ -8,6 +8,7 @@ class InvitesController < ApplicationController
   before_action :authenticate_user!
   before_action :set_pack
   before_action :set_body_classes
+  before_action :set_cache_headers
 
   def index
     authorize :invite, :create?
@@ -54,4 +55,8 @@ class InvitesController < ApplicationController
   def set_body_classes
     @body_classes = 'admin'
   end
+
+  def set_cache_headers
+    response.cache_control.replace(private: true, no_store: true)
+  end
 end

app/controllers/manifests_controller.rb

@@ -1,8 +1,9 @@
 # frozen_string_literal: true
 
-class ManifestsController < ApplicationController
+class ManifestsController < ActionController::Base # rubocop:disable Rails/ApplicationController
-  skip_before_action :store_current_location
+  # Prevent `active_model_serializer`'s `ActionController::Serialization` from calling `current_user`
-  skip_before_action :require_functional!
+  # and thus re-issuing session cookies
+  serialization_scope nil
 
   def show
     expires_in 3.minutes, public: true

app/controllers/media_controller.rb

@@ -3,7 +3,6 @@
 class MediaController < ApplicationController
   include Authorization
 
-  skip_before_action :store_current_location
   skip_before_action :require_functional!, unless: :whitelist_mode?
 
   before_action :authenticate_user!, if: :whitelist_mode?

app/controllers/media_proxy_controller.rb

@@ -6,7 +6,6 @@ class MediaProxyController < ApplicationController
   include Redisable
   include Lockable
 
-  skip_before_action :store_current_location
   skip_before_action :require_functional!
 
   before_action :authenticate_user!, if: :whitelist_mode?

app/controllers/oauth/authorizations_controller.rb

@@ -39,6 +39,6 @@ class Oauth::AuthorizationsController < Doorkeeper::AuthorizationsController
   end
 
   def set_cache_headers
-    response.headers['Cache-Control'] = 'private, no-store'
+    response.cache_control.replace(private: true, no_store: true)
   end
 end

app/controllers/oauth/authorized_applications_controller.rb

@@ -8,6 +8,7 @@ class Oauth::AuthorizedApplicationsController < Doorkeeper::AuthorizedApplicatio
   before_action :set_pack
   before_action :require_not_suspended!, only: :destroy
   before_action :set_body_classes
+  before_action :set_cache_headers
 
   skip_before_action :require_functional!
 
@@ -35,4 +36,8 @@ class Oauth::AuthorizedApplicationsController < Doorkeeper::AuthorizedApplicatio
   def require_not_suspended!
     forbidden if current_account.suspended?
   end
+
+  def set_cache_headers
+    response.cache_control.replace(private: true, no_store: true)
+  end
 end

app/controllers/privacy_controller.rb

@@ -8,7 +8,7 @@ class PrivacyController < ApplicationController
   before_action :set_instance_presenter
 
   def show
-    expires_in 0, public: true if current_account.nil?
+    expires_in(15.seconds, public: true, stale_while_revalidate: 30.seconds, stale_if_error: 1.day) unless user_signed_in?
   end
 
   private

app/controllers/relationships_controller.rb

@@ -8,6 +8,7 @@ class RelationshipsController < ApplicationController
   before_action :set_pack
   before_action :set_relationships, only: :show
   before_action :set_body_classes
+  before_action :set_cache_headers
 
   helper_method :following_relationship?, :followed_by_relationship?, :mutual_relationship?
 
@@ -75,4 +76,8 @@ class RelationshipsController < ApplicationController
   def set_pack
     use_pack 'admin'
   end
+
+  def set_cache_headers
+    response.cache_control.replace(private: true, no_store: true)
+  end
 end

app/controllers/settings/base_controller.rb

@@ -19,7 +19,7 @@ class Settings::BaseController < ApplicationController
   end
 
   def set_cache_headers
-    response.headers['Cache-Control'] = 'private, no-store'
+    response.cache_control.replace(private: true, no_store: true)
   end
 
   def require_not_suspended!

app/controllers/statuses_cleanup_controller.rb

@@ -7,6 +7,7 @@ class StatusesCleanupController < ApplicationController
   before_action :set_policy
   before_action :set_body_classes
   before_action :set_pack
+  before_action :set_cache_headers
 
   def show; end
 
@@ -41,4 +42,8 @@ class StatusesCleanupController < ApplicationController
   def set_body_classes
     @body_classes = 'admin'
   end
+
+  def set_cache_headers
+    response.cache_control.replace(private: true, no_store: true)
+  end
 end

app/controllers/statuses_controller.rb

@@ -6,11 +6,12 @@ class StatusesController < ApplicationController
   include Authorization
   include AccountOwnedConcern
 
+  vary_by -> { public_fetch_mode? ? 'Accept, Accept-Language, Cookie' : 'Accept, Accept-Language, Cookie, Signature' }
+
   before_action :require_account_signature!, only: [:show, :activity], if: -> { request.format == :json && authorized_fetch_mode? }
   before_action :set_status
   before_action :set_instance_presenter
   before_action :redirect_to_original, only: :show
-  before_action :set_cache_headers
   before_action :set_body_classes, only: :embed
 
   after_action :set_link_headers
@@ -29,7 +30,7 @@ class StatusesController < ApplicationController
       end
 
       format.json do
-        expires_in 3.minutes, public: @status.distributable? && public_fetch_mode?
+        expires_in 3.minutes, public: true if @status.distributable? && public_fetch_mode?
         render_with_cache json: @status, content_type: 'application/activity+json', serializer: ActivityPub::NoteSerializer, adapter: ActivityPub::Adapter
       end
     end

app/controllers/tags_controller.rb

@@ -7,6 +7,8 @@ class TagsController < ApplicationController
   PAGE_SIZE     = 20
   PAGE_SIZE_MAX = 200
 
+  vary_by -> { public_fetch_mode? ? 'Accept, Accept-Language, Cookie' : 'Accept, Accept-Language, Cookie, Signature' }
+
   before_action :require_account_signature!, if: -> { request.format == :json && authorized_fetch_mode? }
   before_action :authenticate_user!, if: :whitelist_mode?
   before_action :set_local
@@ -19,7 +21,7 @@ class TagsController < ApplicationController
   def show
     respond_to do |format|
       format.html do
-        expires_in 0, public: true unless user_signed_in?
+        expires_in(15.seconds, public: true, stale_while_revalidate: 30.seconds, stale_if_error: 1.hour) unless user_signed_in?
       end
 
       format.rss do

app/controllers/well_known/host_meta_controller.rb

@@ -1,11 +1,9 @@
 # frozen_string_literal: true
 
 module WellKnown
-  class HostMetaController < ActionController::Base
+  class HostMetaController < ActionController::Base # rubocop:disable Rails/ApplicationController
     include RoutingHelper
 
-    before_action { response.headers['Vary'] = 'Accept' }
-
     def show
       @webfinger_template = "#{webfinger_url}?resource={uri}"
       expires_in 3.days, public: true

app/controllers/well_known/nodeinfo_controller.rb

@@ -1,10 +1,12 @@
 # frozen_string_literal: true
 
 module WellKnown
-  class NodeInfoController < ActionController::Base
+  class NodeInfoController < ActionController::Base # rubocop:disable Rails/ApplicationController
     include CacheConcern
 
-    before_action { response.headers['Vary'] = 'Accept' }
+    # Prevent `active_model_serializer`'s `ActionController::Serialization` from calling `current_user`
+    # and thus re-issuing session cookies
+    serialization_scope nil
 
     def index
       expires_in 3.days, public: true

app/controllers/well_known/webfinger_controller.rb

@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 module WellKnown
-  class WebfingerController < ActionController::Base
+  class WebfingerController < ActionController::Base # rubocop:disable Rails/ApplicationController
     include RoutingHelper
 
     before_action :set_account
@@ -34,7 +34,12 @@ module WellKnown
     end
 
     def check_account_suspension
-      expires_in(3.minutes, public: true) && gone if @account.suspended_permanently?
+      gone if @account.suspended_permanently?
+    end
+
+    def gone
+      expires_in(3.minutes, public: true)
+      head 410
     end
 
     def bad_request
@@ -46,9 +51,5 @@ module WellKnown
       expires_in(3.minutes, public: true)
       head 404
     end
-
-    def gone
-      head 410
-    end
   end
 end

app/helpers/application_helper.rb

@@ -155,20 +155,8 @@ module ApplicationHelper
     tag(:meta, content: content, property: property)
   end
 
-  def react_component(name, props = {}, &block)
-    if block.nil?
-      content_tag(:div, nil, data: { component: name.to_s.camelcase, props: Oj.dump(props) })
-    else
-      content_tag(:div, data: { component: name.to_s.camelcase, props: Oj.dump(props) }, &block)
-    end
-  end
-
-  def react_admin_component(name, props = {})
-    content_tag(:div, nil, data: { 'admin-component': name.to_s.camelcase, props: Oj.dump({ locale: I18n.locale }.merge(props)) })
-  end
-
   def body_classes
-    output = (@body_classes || '').split
+    output = body_class_string.split
     output << "flavour-#{current_flavour.parameterize}"
     output << "skin-#{current_skin.parameterize}"
     output << 'system-font' if current_account&.user&.setting_system_font_ui

app/helpers/instance_helper.rb

@@ -9,13 +9,17 @@ module InstanceHelper
     @site_hostname ||= Addressable::URI.parse("//#{Rails.configuration.x.local_domain}").display_uri.host
   end
 
-  def description_for_sign_up
+  def description_for_sign_up(invite = nil)
-    prefix = if @invite.present?
+    safe_join([description_prefix(invite), I18n.t('auth.description.suffix')], ' ')
-               I18n.t('auth.description.prefix_invited_by_user', name: @invite.user.account.username)
+  end
+
+  private
+
+  def description_prefix(invite)
+    if invite.present?
+      I18n.t('auth.description.prefix_invited_by_user', name: invite.user.account.username)
     else
       I18n.t('auth.description.prefix_sign_up')
     end
-
-    safe_join([prefix, I18n.t('auth.description.suffix')], ' ')
   end
 end

app/helpers/jsonld_helper.rb

@@ -63,11 +63,11 @@ module JsonLdHelper
     uri.nil? || !uri.start_with?('http://', 'https://')
   end
 
-  def invalid_origin?(url)
+  def non_matching_uri_hosts?(base_url, comparison_url)
-    return true if unsupported_uri_scheme?(url)
+    return true if unsupported_uri_scheme?(comparison_url)
 
-    needle   = Addressable::URI.parse(url).host
+    needle = Addressable::URI.parse(comparison_url).host
-    haystack = Addressable::URI.parse(@account.uri).host
+    haystack = Addressable::URI.parse(base_url).host
 
     !haystack.casecmp(needle).zero?
   end

app/helpers/languages_helper.rb

@@ -201,7 +201,6 @@ module LanguagesHelper
     sma: ['Southern Sami', 'Åarjelsaemien Gïele'].freeze,
     smj: ['Lule Sami', 'Julevsámegiella'].freeze,
     szl: ['Silesian', 'ślůnsko godka'].freeze,
-    tai: ['Tai', 'ภาษาไท or ภาษาไต'].freeze,
     tok: ['Toki Pona', 'toki pona'].freeze,
     zba: ['Balaibalan', 'باليبلن'].freeze,
     zgh: ['Standard Moroccan Tamazight', 'ⵜⴰⵎⴰⵣⵉⵖⵜ'].freeze,

app/helpers/media_component_helper.rb

@@ -0,0 +1,111 @@
+# frozen_string_literal: true
+
+module MediaComponentHelper
+  def render_video_component(status, **options)
+    video = status.ordered_media_attachments.first
+
+    meta = video.file.meta || {}
+
+    component_params = {
+      sensitive: sensitive_viewer?(status, current_account),
+      src: full_asset_url(video.file.url(:original)),
+      preview: full_asset_url(video.thumbnail.present? ? video.thumbnail.url : video.file.url(:small)),
+      alt: video.description,
+      blurhash: video.blurhash,
+      frameRate: meta.dig('original', 'frame_rate'),
+      inline: true,
+      media: [
+        serialize_media_attachment(video),
+      ].as_json,
+    }.merge(**options)
+
+    react_component :video, component_params do
+      render partial: 'statuses/attachment_list', locals: { attachments: status.ordered_media_attachments }
+    end
+  end
+
+  def render_audio_component(status, **options)
+    audio = status.ordered_media_attachments.first
+
+    meta = audio.file.meta || {}
+
+    component_params = {
+      src: full_asset_url(audio.file.url(:original)),
+      poster: full_asset_url(audio.thumbnail.present? ? audio.thumbnail.url : status.account.avatar_static_url),
+      alt: audio.description,
+      backgroundColor: meta.dig('colors', 'background'),
+      foregroundColor: meta.dig('colors', 'foreground'),
+      accentColor: meta.dig('colors', 'accent'),
+      duration: meta.dig('original', 'duration'),
+    }.merge(**options)
+
+    react_component :audio, component_params do
+      render partial: 'statuses/attachment_list', locals: { attachments: status.ordered_media_attachments }
+    end
+  end
+
+  def render_media_gallery_component(status, **options)
+    component_params = {
+      sensitive: sensitive_viewer?(status, current_account),
+      autoplay: prefers_autoplay?,
+      media: status.ordered_media_attachments.map { |a| serialize_media_attachment(a).as_json },
+    }.merge(**options)
+
+    react_component :media_gallery, component_params do
+      render partial: 'statuses/attachment_list', locals: { attachments: status.ordered_media_attachments }
+    end
+  end
+
+  def render_card_component(status, **options)
+    component_params = {
+      sensitive: sensitive_viewer?(status, current_account),
+      card: serialize_status_card(status).as_json,
+    }.merge(**options)
+
+    react_component :card, component_params
+  end
+
+  def render_poll_component(status, **options)
+    component_params = {
+      disabled: true,
+      poll: serialize_status_poll(status).as_json,
+    }.merge(**options)
+
+    react_component :poll, component_params do
+      render partial: 'statuses/poll', locals: { status: status, poll: status.preloadable_poll, autoplay: prefers_autoplay? }
+    end
+  end
+
+  private
+
+  def serialize_media_attachment(attachment)
+    ActiveModelSerializers::SerializableResource.new(
+      attachment,
+      serializer: REST::MediaAttachmentSerializer
+    )
+  end
+
+  def serialize_status_card(status)
+    ActiveModelSerializers::SerializableResource.new(
+      status.preview_card,
+      serializer: REST::PreviewCardSerializer
+    )
+  end
+
+  def serialize_status_poll(status)
+    ActiveModelSerializers::SerializableResource.new(
+      status.preloadable_poll,
+      serializer: REST::PollSerializer,
+      scope: current_user,
+      scope_name: :current_user
+    )
+  end
+
+  def sensitive_viewer?(status, account)
+    if !account.nil? && account.id == status.account_id
+      status.sensitive
+    else
+      status.account.sensitized? || status.sensitive
+    end
+  end
+end

app/helpers/react_component_helper.rb

@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+
+module ReactComponentHelper
+  def react_component(name, props = {}, &block)
+    data = { component: name.to_s.camelcase, props: Oj.dump(props) }
+    if block.nil?
+      div_tag_with_data(data)
+    else
+      content_tag(:div, data: data, &block)
+    end
+  end
+
+  def react_admin_component(name, props = {})
+    data = { 'admin-component': name.to_s.camelcase, props: Oj.dump({ locale: I18n.locale }.merge(props)) }
+    div_tag_with_data(data)
+  end
+
+  private
+
+  def div_tag_with_data(data)
+    content_tag(:div, nil, data: data)
+  end
+end

app/helpers/statuses_helper.rb

@@ -105,94 +105,10 @@ module StatusesHelper
     end
   end
 
-  def sensitized?(status, account)
-    if !account.nil? && account.id == status.account_id
-      status.sensitive
-    else
-      status.account.sensitized? || status.sensitive
-    end
-  end
-
   def embedded_view?
     params[:controller] == EMBEDDED_CONTROLLER && params[:action] == EMBEDDED_ACTION
   end
 
-  def render_video_component(status, **options)
-    video = status.ordered_media_attachments.first
-
-    meta = video.file.meta || {}
-
-    component_params = {
-      sensitive: sensitized?(status, current_account),
-      src: full_asset_url(video.file.url(:original)),
-      preview: full_asset_url(video.thumbnail.present? ? video.thumbnail.url : video.file.url(:small)),
-      alt: video.description,
-      blurhash: video.blurhash,
-      frameRate: meta.dig('original', 'frame_rate'),
-      inline: true,
-      media: [
-        ActiveModelSerializers::SerializableResource.new(video, serializer: REST::MediaAttachmentSerializer),
-      ].as_json,
-    }.merge(**options)
-
-    react_component :video, component_params do
-      render partial: 'statuses/attachment_list', locals: { attachments: status.ordered_media_attachments }
-    end
-  end
-
-  def render_audio_component(status, **options)
-    audio = status.ordered_media_attachments.first
-
-    meta = audio.file.meta || {}
-
-    component_params = {
-      src: full_asset_url(audio.file.url(:original)),
-      poster: full_asset_url(audio.thumbnail.present? ? audio.thumbnail.url : status.account.avatar_static_url),
-      alt: audio.description,
-      backgroundColor: meta.dig('colors', 'background'),
-      foregroundColor: meta.dig('colors', 'foreground'),
-      accentColor: meta.dig('colors', 'accent'),
-      duration: meta.dig('original', 'duration'),
-    }.merge(**options)
-
-    react_component :audio, component_params do
-      render partial: 'statuses/attachment_list', locals: { attachments: status.ordered_media_attachments }
-    end
-  end
-
-  def render_media_gallery_component(status, **options)
-    component_params = {
-      sensitive: sensitized?(status, current_account),
-      autoplay: prefers_autoplay?,
-      media: status.ordered_media_attachments.map { |a| ActiveModelSerializers::SerializableResource.new(a, serializer: REST::MediaAttachmentSerializer).as_json },
-    }.merge(**options)
-
-    react_component :media_gallery, component_params do
-      render partial: 'statuses/attachment_list', locals: { attachments: status.ordered_media_attachments }
-    end
-  end
-
-  def render_card_component(status, **options)
-    component_params = {
-      sensitive: sensitized?(status, current_account),
-      maxDescription: 160,
-      card: ActiveModelSerializers::SerializableResource.new(status.preview_card, serializer: REST::PreviewCardSerializer).as_json,
-    }.merge(**options)
-
-    react_component :card, component_params
-  end
-
-  def render_poll_component(status, **options)
-    component_params = {
-      disabled: true,
-      poll: ActiveModelSerializers::SerializableResource.new(status.preloadable_poll, serializer: REST::PollSerializer, scope: current_user, scope_name: :current_user).as_json,
-    }.merge(**options)
-
-    react_component :poll, component_params do
-      render partial: 'statuses/poll', locals: { status: status, poll: status.preloadable_poll, autoplay: prefers_autoplay? }
-    end
-  end
-
   def prefers_autoplay?
     ActiveModel::Type::Boolean.new.cast(params[:autoplay]) || current_user&.setting_auto_play_gif
   end

app/javascript/images/elephant_ui_conversation.svg

@@ -0,0 +1,57 @@
+<svg width="293" height="264" viewBox="0 0 293 264" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M34.1 204.9C28.1 210.7 22.3 209.9 15.9 204.3C13.4 202.1 11.3 205.2 15.3 209.2C19.3 213.2 28.8 217.5 37.3 210" fill="#E09C5C"/>
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+<path d="M49 139L45.5 139.6C44.5 139.8 43.5001 139.1 43.4001 138.1C43.2001 137.1 43.9001 136.1 44.9001 136L48.4001 135.4C49.4001 135.2 50.4 135.9 50.5 136.9C50.7 137.9 50.1 138.9 49 139Z" fill="#E68A4C"/>
+<path d="M119.7 114.2C120.4 114 120.7 113.8 121.3 113.5" stroke="#FBD7A3" stroke-width="2.8533" stroke-miterlimit="10" stroke-linecap="round" stroke-linejoin="round"/>
+<path d="M114.5 115.6C115.4 115.4 114.9 115.6 115.7 115.4" stroke="#FBD7A3" stroke-width="2.8533" stroke-miterlimit="10" stroke-linecap="round" stroke-linejoin="round"/>
+<path d="M102.2 115.8C104.4 116.1 106.6 116.2 108.8 116.2" stroke="#FBD7A3" stroke-width="2.8533" stroke-miterlimit="10" stroke-linecap="round" stroke-linejoin="round"/>
+<path d="M88.1 111.8C90.5 112.9 93.1 113.8 95.8 114.5" stroke="#FBD7A3" stroke-width="2.8533" stroke-miterlimit="10" stroke-linecap="round" stroke-linejoin="round"/>
+<path d="M207.1 140.8C207.8 140.5 208.4 140.3 209 140" stroke="white" stroke-width="2.2827" stroke-miterlimit="10" stroke-linecap="round" stroke-linejoin="round"/>
+<path d="M201.6 143.5C202.5 143 202.5 142.9 203.4 142.4" stroke="white" stroke-width="2.2827" stroke-miterlimit="10" stroke-linecap="round" stroke-linejoin="round"/>
+<path d="M193.8 148.9C195.4 147.7 196.3 147 197.9 146" stroke="white" stroke-width="2.2827" stroke-miterlimit="10" stroke-linecap="round" stroke-linejoin="round"/>
+<path d="M186.1 156.2C187.3 154.9 188.7 153.6 190.1 152.3" stroke="white" stroke-width="2.2827" stroke-miterlimit="10" stroke-linecap="round" stroke-linejoin="round"/>
+<path d="M262.1 235.4C268.1 241.2 273.9 240.4 280.3 234.8C282.8 232.6 284.9 235.7 280.9 239.7C276.9 243.7 267.4 248 258.9 240.5" fill="#DCCEB5"/>
+<path d="M262.1 235.4C268.1 241.2 273.9 240.4 280.3 234.8C282.8 232.6 284.9 235.7 280.9 239.7C276.9 243.7 267.4 248 258.9 240.5" stroke="#668794" stroke-width="2.2827" stroke-miterlimit="10" stroke-linecap="round" stroke-linejoin="round"/>
+</svg>

app/javascript/mastodon/actions/compose.js

@@ -74,6 +74,7 @@ export const COMPOSE_CHANGE_MEDIA_DESCRIPTION = 'COMPOSE_CHANGE_MEDIA_DESCRIPTIO
 export const COMPOSE_CHANGE_MEDIA_FOCUS       = 'COMPOSE_CHANGE_MEDIA_FOCUS';
 
 export const COMPOSE_SET_STATUS = 'COMPOSE_SET_STATUS';
+export const COMPOSE_FOCUS = 'COMPOSE_FOCUS';
 
 const messages = defineMessages({
   uploadErrorLimit: { id: 'upload_error.limit', defaultMessage: 'File upload limit exceeded.' },
@@ -125,6 +126,15 @@ export function resetCompose() {
   };
 }
 
+export const focusCompose = (routerHistory, defaultText) => dispatch => {
+  dispatch({
+    type: COMPOSE_FOCUS,
+    defaultText,
+  });
+
+  ensureComposeIsVisible(routerHistory);
+};
+
 export function mentionCompose(account, routerHistory) {
   return (dispatch, getState) => {
     dispatch({

app/javascript/mastodon/actions/search.js

@@ -135,8 +135,7 @@ export const showSearch = () => ({
   type: SEARCH_SHOW,
 });
 
-export const openURL = routerHistory => (dispatch, getState) => {
+export const openURL = (value, history, onFailure) => (dispatch, getState) => {
-  const value = getState().getIn(['search', 'value']);
   const signedIn = !!getState().getIn(['meta', 'me']);
 
   if (!signedIn) {
@@ -148,15 +147,21 @@ export const openURL = routerHistory => (dispatch, getState) => {
   api(getState).get('/api/v2/search', { params: { q: value, resolve: true } }).then(response => {
     if (response.data.accounts?.length > 0) {
       dispatch(importFetchedAccounts(response.data.accounts));
-      routerHistory.push(`/@${response.data.accounts[0].acct}`);
+      history.push(`/@${response.data.accounts[0].acct}`);
     } else if (response.data.statuses?.length > 0) {
       dispatch(importFetchedStatuses(response.data.statuses));
-      routerHistory.push(`/@${response.data.statuses[0].account.acct}/${response.data.statuses[0].id}`);
+      history.push(`/@${response.data.statuses[0].account.acct}/${response.data.statuses[0].id}`);
+    } else if (onFailure) {
+      onFailure();
     }
 
     dispatch(fetchSearchSuccess(response.data, value));
   }).catch(err => {
     dispatch(fetchSearchFail(err));
+
+    if (onFailure) {
+      onFailure();
+    }
   });
 };
 

app/javascript/mastodon/components/account.jsx

@@ -12,8 +12,8 @@ import Skeleton from 'mastodon/components/skeleton';
 import { Link } from 'react-router-dom';
 import { counterRenderer } from 'mastodon/components/common_counter';
 import ShortNumber from 'mastodon/components/short_number';
-import Icon from 'mastodon/components/icon';
 import classNames from 'classnames';
+import VerifiedBadge from 'mastodon/components/verified_badge';
 
 const messages = defineMessages({
   follow: { id: 'account.follow', defaultMessage: 'Follow' },
@@ -27,26 +27,6 @@ const messages = defineMessages({
   block: { id: 'account.block', defaultMessage: 'Block @{name}' },
 });
 
-class VerifiedBadge extends React.PureComponent {
-
-  static propTypes = {
-    link: PropTypes.string.isRequired,
-    verifiedAt: PropTypes.string.isRequired,
-  };
-
-  render () {
-    const { link } = this.props;
-
-    return (
-      <span className='verified-badge'>
-        <Icon id='check' className='verified-badge__mark' />
-        <span dangerouslySetInnerHTML={{ __html: link }} />
-      </span>
-    );
-  }
-
-}
-
 class Account extends ImmutablePureComponent {
 
   static propTypes = {

app/javascript/mastodon/components/check.jsx

@@ -1,8 +1,8 @@
 import React from 'react';
 
 const Check = () => (
-  <svg width='14' height='11' viewBox='0 0 14 11'>
+  <svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='currentColor'>
-    <path d='M11.264 0L5.26 6.004 2.103 2.847 0 4.95l5.26 5.26 8.108-8.107L11.264 0' fill='currentColor' fillRule='evenodd' />
+    <path fillRule='evenodd' d='M16.704 4.153a.75.75 0 01.143 1.052l-8 10.5a.75.75 0 01-1.127.075l-4.5-4.5a.75.75 0 011.06-1.06l3.894 3.893 7.48-9.817a.75.75 0 011.05-.143z' clipRule='evenodd' />
   </svg>
 );
 

app/javascript/mastodon/components/column_back_button.jsx

@@ -12,13 +12,19 @@ export default class ColumnBackButton extends React.PureComponent {
 
   static propTypes = {
     multiColumn: PropTypes.bool,
+    onClick: PropTypes.func,
   };
 
   handleClick = () => {
-    if (window.history && window.history.state) {
+    const { router } = this.context;
-      this.context.router.history.goBack();
+    const { onClick } = this.props;
+
+    if (onClick) {
+      onClick();
+    } else if (window.history && window.history.state) {
+      router.history.goBack();
     } else {
-      this.context.router.history.push('/');
+      router.history.push('/');
     }
   };
 

app/javascript/mastodon/components/edited_timestamp/index.jsx

@@ -32,7 +32,7 @@ class EditedTimestamp extends React.PureComponent {
 
   renderHeader = items => {
     return (
-      <FormattedMessage id='status.edited_x_times' defaultMessage='Edited {count, plural, one {{count} time} other {{count} times}}' values={{ count: items.size - 1 }} />
+      <FormattedMessage id='status.edited_x_times' defaultMessage='Edited {count, plural, one {# time} other {# times}}' values={{ count: items.size - 1 }} />
     );
   };
 

app/javascript/mastodon/components/hashtag.jsx

@@ -43,7 +43,7 @@ class SilentErrorBoundary extends React.Component {
 export const accountsCountRenderer = (displayNumber, pluralReady) => (
   <FormattedMessage
     id='trends.counter_by_accounts'
-    defaultMessage='{count, plural, one {{counter} person} other {{counter} people}} in the past {days, plural, one {day} other {{days} days}}'
+    defaultMessage='{count, plural, one {{counter} person} other {{counter} people}} in the past {days, plural, one {day} other {# days}}'
     values={{
       count: pluralReady,
       counter: <strong>{displayNumber}</strong>,

app/javascript/mastodon/components/logo.jsx

@@ -1,10 +1,15 @@
 import React from 'react';
+import logo from 'mastodon/../images/logo.svg';
 
-const Logo = () => (
+export const WordmarkLogo = () => (
-  <svg viewBox='0 0 261 66' className='logo' role='img'>
+  <svg viewBox='0 0 261 66' className='logo logo--wordmark' role='img'>
     <title>Mastodon</title>
     <use xlinkHref='#logo-symbol-wordmark' />
   </svg>
 );
 
-export default Logo;
+export const SymbolLogo = () => (
+  <img src={logo} alt='Mastodon' className='logo logo--icon' />
+);
+
+export default WordmarkLogo;

app/javascript/mastodon/components/short_number.jsx

@@ -32,17 +32,14 @@ function ShortNumber({ value, renderer, children }) {
   const shortNumber = toShortNumber(value);
   const [, division] = shortNumber;
 
-  // eslint-disable-next-line eqeqeq
   if (children != null && renderer != null) {
     console.warn('Both renderer prop and renderer as a child provided. This is a mistake and you really should fix that. Only renderer passed as a child will be used.');
   }
 
-  // eslint-disable-next-line eqeqeq
   const customRenderer = children != null ? children : renderer;
 
   const displayNumber = <ShortNumberCounter value={shortNumber} />;
 
-  // eslint-disable-next-line eqeqeq
   return customRenderer != null
     ? customRenderer(displayNumber, pluralReady(value, division))
     : displayNumber;

app/javascript/mastodon/components/status.jsx

@@ -68,6 +68,9 @@ class Status extends ImmutablePureComponent {
   static propTypes = {
     status: ImmutablePropTypes.map,
     account: ImmutablePropTypes.map,
+    previousId: PropTypes.string,
+    nextInReplyToId: PropTypes.string,
+    rootId: PropTypes.string,
     onClick: PropTypes.func,
     onReply: PropTypes.func,
     onFavourite: PropTypes.func,
@@ -309,10 +312,7 @@ class Status extends ImmutablePureComponent {
   };
 
   render () {
-    let media = null;
+    const { intl, hidden, featured, unread, showThread, scrollKey, pictureInPicture, previousId, nextInReplyToId, rootId } = this.props;
-    let statusAvatar, prepend, rebloggedByText;
-
-    const { intl, hidden, featured, unread, showThread, scrollKey, pictureInPicture } = this.props;
 
     let { status, account, ...other } = this.props;
 
@@ -334,6 +334,8 @@ class Status extends ImmutablePureComponent {
       openMedia: this.handleHotkeyOpenMedia,
     };
 
+    let media, statusAvatar, prepend, rebloggedByText;
+
     if (hidden) {
       return (
         <HotKeys handlers={handlers}>
@@ -345,7 +347,11 @@ class Status extends ImmutablePureComponent {
       );
     }
 
+    const connectUp = previousId && previousId === status.get('in_reply_to_id');
+    const connectToRoot = rootId && rootId === status.get('in_reply_to_id');
+    const connectReply = nextInReplyToId && nextInReplyToId === status.get('id');
     const matchedFilters = status.get('matched_filters');
+
     if (this.state.forceFilter === undefined ? matchedFilters : this.state.forceFilter) {
       const minHandlers = this.props.muted ? {} : {
         moveUp: this.handleHotkeyMoveUp,
@@ -519,7 +525,10 @@ class Status extends ImmutablePureComponent {
         <div className={classNames('status__wrapper', `status__wrapper-${status.get('visibility')}`, { 'status__wrapper-reply': !!status.get('in_reply_to_id'), unread, focusable: !this.props.muted })} tabIndex={this.props.muted ? null : 0} data-featured={featured ? 'true' : null} aria-label={textForScreenReader(intl, status, rebloggedByText)} ref={this.handleRef}>
           {prepend}
 
-          <div className={classNames('status', `status-${status.get('visibility')}`, { 'status-reply': !!status.get('in_reply_to_id'), muted: this.props.muted })} data-id={status.get('id')}>
+          <div className={classNames('status', `status-${status.get('visibility')}`, { 'status-reply': !!status.get('in_reply_to_id'), 'status--in-thread': !!rootId, 'status--first-in-thread': previousId && (!connectUp || connectToRoot), muted: this.props.muted })} data-id={status.get('id')}>
+            {(connectReply || connectUp || connectToRoot) && <div className={classNames('status__line', { 'status__line--full': connectReply, 'status__line--first': !status.get('in_reply_to_id') && !connectToRoot })} />}
+
+            {/* eslint-disable-next-line jsx-a11y/no-static-element-interactions */}
             <div onClick={this.handleClick} className='status__info'>
               <a href={`/@${status.getIn(['account', 'acct'])}/${status.get('id')}`} className='status__relative-time' target='_blank' rel='noopener noreferrer'>
                 <span className='status__visibility-icon'><Icon id={visibilityIcon.icon} title={visibilityIcon.text} /></span>

app/javascript/mastodon/components/status_content.jsx

@@ -104,7 +104,7 @@ class StatusContent extends React.PureComponent {
         link.setAttribute('href', `/@${mention.get('acct')}`);
       } else if (link.textContent[0] === '#' || (link.previousSibling && link.previousSibling.textContent && link.previousSibling.textContent[link.previousSibling.textContent.length - 1] === '#')) {
         link.addEventListener('click', this.onHashtagClick.bind(this, link.text), false);
-        link.setAttribute('href', `/tags/${link.text.slice(1)}`);
+        link.setAttribute('href', `/tags/${link.text.replace(/^#/, '')}`);
       } else {
         link.setAttribute('title', link.href);
         link.classList.add('unhandled-link');

app/javascript/mastodon/components/verified_badge.jsx

@@ -0,0 +1,25 @@
+import React from 'react';
+import PropTypes from 'prop-types';
+import Icon from 'mastodon/components/icon';
+
+class VerifiedBadge extends React.PureComponent {
+
+  static propTypes = {
+    link: PropTypes.string.isRequired,
+    verifiedAt: PropTypes.string.isRequired,
+  };
+
+  render () {
+    const { link } = this.props;
+
+    return (
+      <span className='verified-badge'>
+        <Icon id='check' className='verified-badge__mark' />
+        <span dangerouslySetInnerHTML={{ __html: link }} />
+      </span>
+    );
+  }
+
+}
+
+export default VerifiedBadge;

app/javascript/mastodon/containers/status_container.jsx

@@ -67,6 +67,7 @@ const makeMapStateToProps = () => {
 
   const mapStateToProps = (state, props) => ({
     status: getStatus(state, props),
+    nextInReplyToId: props.nextId ? state.getIn(['statuses', props.nextId, 'in_reply_to_id']) : null,
     pictureInPicture: getPictureInPicture(state, props),
   });
 

app/javascript/mastodon/features/account/components/header.jsx

@@ -80,6 +80,7 @@ class Header extends ImmutablePureComponent {
 
   static contextTypes = {
     identity: PropTypes.object,
+    router: PropTypes.object,
   };
 
   static propTypes = {
@@ -101,11 +102,16 @@ class Header extends ImmutablePureComponent {
     onChangeLanguages: PropTypes.func.isRequired,
     onInteractionModal: PropTypes.func.isRequired,
     onOpenAvatar: PropTypes.func.isRequired,
+    onOpenURL: PropTypes.func.isRequired,
     intl: PropTypes.object.isRequired,
     domain: PropTypes.string.isRequired,
     hidden: PropTypes.bool,
   };
 
+  setRef = c => {
+    this.node = c;
+  };
+
   openEditProfile = () => {
     window.open('/settings/profile', '_blank');
   };
@@ -162,6 +168,61 @@ class Header extends ImmutablePureComponent {
     });
   };
 
+  handleHashtagClick = e => {
+    const { router } = this.context;
+    const value = e.currentTarget.textContent.replace(/^#/, '');
+
+    if (router && e.button === 0 && !(e.ctrlKey || e.metaKey)) {
+      e.preventDefault();
+      router.history.push(`/tags/${value}`);
+    }
+  };
+
+  handleMentionClick = e => {
+    const { router } = this.context;
+    const { onOpenURL } = this.props;
+
+    if (router && e.button === 0 && !(e.ctrlKey || e.metaKey)) {
+      e.preventDefault();
+
+      const link = e.currentTarget;
+
+      onOpenURL(link.href, router.history, () => {
+        window.location = link.href;
+      });
+    }
+  };
+
+  _attachLinkEvents () {
+    const node = this.node;
+
+    if (!node) {
+      return;
+    }
+
+    const links = node.querySelectorAll('a');
+
+    let link;
+
+    for (var i = 0; i < links.length; ++i) {
+      link = links[i];
+
+      if (link.textContent[0] === '#' || (link.previousSibling && link.previousSibling.textContent && link.previousSibling.textContent[link.previousSibling.textContent.length - 1] === '#')) {
+        link.addEventListener('click', this.handleHashtagClick, false);
+      } else if (link.classList.contains('mention')) {
+        link.addEventListener('click', this.handleMentionClick, false);
+      }
+    }
+  }
+
+  componentDidMount () {
+    this._attachLinkEvents();
+  }
+
+  componentDidUpdate () {
+    this._attachLinkEvents();
+  }
+
   render () {
     const { account, hidden, intl, domain } = this.props;
     const { signedIn, permissions } = this.context.identity;
@@ -360,7 +421,7 @@ class Header extends ImmutablePureComponent {
 
           {!(suspended || hidden) && (
             <div className='account__header__extra'>
-              <div className='account__header__bio'>
+              <div className='account__header__bio' ref={this.setRef}>
                 {(account.get('id') !== me && signedIn) && <AccountNoteContainer account={account} />}
 
                 {account.get('note').length > 0 && account.get('note') !== '<p></p>' && <div className='account__header__content translate' dangerouslySetInnerHTML={content} />}

app/javascript/mastodon/features/account_timeline/components/header.jsx

@@ -26,6 +26,7 @@ export default class Header extends ImmutablePureComponent {
     onChangeLanguages: PropTypes.func.isRequired,
     onInteractionModal: PropTypes.func.isRequired,
     onOpenAvatar: PropTypes.func.isRequired,
+    onOpenURL: PropTypes.func.isRequired,
     hideTabs: PropTypes.bool,
     domain: PropTypes.string.isRequired,
     hidden: PropTypes.bool,
@@ -137,6 +138,7 @@ export default class Header extends ImmutablePureComponent {
           onChangeLanguages={this.handleChangeLanguages}
           onInteractionModal={this.handleInteractionModal}
           onOpenAvatar={this.handleOpenAvatar}
+          onOpenURL={this.props.onOpenURL}
           domain={this.props.domain}
           hidden={hidden}
         />

app/javascript/mastodon/features/account_timeline/containers/header_container.jsx

@@ -10,6 +10,7 @@ import {
   pinAccount,
   unpinAccount,
 } from '../../../actions/accounts';
+import { openURL } from 'mastodon/actions/search';
 import {
   mentionCompose,
   directCompose,
@@ -159,6 +160,10 @@ const mapDispatchToProps = (dispatch, { intl }) => ({
     }));
   },
 
+  onOpenURL (url, routerHistory, onFailure) {
+    dispatch(openURL(url, routerHistory, onFailure));
+  },
+
 });
 
 export default injectIntl(connect(makeMapStateToProps, mapDispatchToProps)(Header));

app/javascript/mastodon/features/compose/components/compose_form.jsx

@@ -20,6 +20,7 @@ import ImmutablePureComponent from 'react-immutable-pure-component';
 import { length } from 'stringz';
 import { countableText } from '../util/counter';
 import Icon from 'mastodon/components/icon';
+import classNames from 'classnames';
 import { maxChars } from '../../../initial_state';
 
 const allowedAroundShortCode = '><\u0085\u0020\u00a0\u1680\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u202f\u205f\u3000\u2028\u2029\u0009\u000a\u000b\u000c\u000d';
@@ -71,6 +72,10 @@ class ComposeForm extends ImmutablePureComponent {
     autoFocus: false,
   };
 
+  state = {
+    highlighted: false,
+  };
+
   handleChange = (e) => {
     this.props.onChange(e.target.value);
   };
@@ -144,6 +149,10 @@ class ComposeForm extends ImmutablePureComponent {
     this._updateFocusAndSelection({ });
   }
 
+  componentWillUnmount () {
+    if (this.timeout) clearTimeout(this.timeout);
+  }
+
   componentDidUpdate (prevProps) {
     this._updateFocusAndSelection(prevProps);
   }
@@ -174,6 +183,8 @@ class ComposeForm extends ImmutablePureComponent {
       Promise.resolve().then(() => {
         this.autosuggestTextarea.textarea.setSelectionRange(selectionStart, selectionEnd);
         this.autosuggestTextarea.textarea.focus();
+        this.setState({ highlighted: true });
+        this.timeout = setTimeout(() => this.setState({ highlighted: false }), 700);
       }).catch(console.error);
     } else if(prevProps.isSubmitting && !this.props.isSubmitting) {
       this.autosuggestTextarea.textarea.focus();
@@ -208,6 +219,7 @@ class ComposeForm extends ImmutablePureComponent {
 
   render () {
     const { intl, onPaste, autoFocus } = this.props;
+    const { highlighted } = this.state;
     const disabled = this.props.isSubmitting;
 
     let publishText = '';
@@ -246,6 +258,7 @@ class ComposeForm extends ImmutablePureComponent {
           />
         </div>
 
+        <div className={classNames('compose-form__highlightable', { active: highlighted })}>
           <AutosuggestTextarea
             ref={this.setAutosuggestTextarea}
             placeholder={intl.formatMessage(messages.placeholder)}
@@ -283,6 +296,7 @@ class ComposeForm extends ImmutablePureComponent {
               <CharacterCounter max={maxChars} text={this.getFulltextForCharacterCounting()} />
             </div>
           </div>
+        </div>
 
         <div className='compose-form__publish'>
           <div className='compose-form__publish-button-wrapper'>

app/javascript/mastodon/features/compose/components/search.jsx

@@ -161,9 +161,9 @@ class Search extends React.PureComponent {
 
   handleURLClick = () => {
     const { router } = this.context;
-    const { onOpenURL } = this.props;
+    const { value, onOpenURL } = this.props;
 
-    onOpenURL(router.history);
+    onOpenURL(value, router.history);
   };
 
   handleStatusSearch = () => {

app/javascript/mastodon/features/compose/components/search_results.jsx

@@ -126,7 +126,7 @@ class SearchResults extends ImmutablePureComponent {
       <div className='search-results'>
         <div className='search-results__header'>
           <Icon id='search' fixedWidth />
-          <FormattedMessage id='search_results.total' defaultMessage='{count, number} {count, plural, one {result} other {results}}' values={{ count }} />
+          <FormattedMessage id='search_results.total' defaultMessage='{count, plural, one {# result} other {# results}}' values={{ count }} />
         </div>
 
         {accounts}

app/javascript/mastodon/features/compose/containers/search_container.js

@@ -34,8 +34,8 @@ const mapDispatchToProps = dispatch => ({
     dispatch(showSearch());
   },
 
-  onOpenURL (routerHistory) {
+  onOpenURL (q, routerHistory) {
-    dispatch(openURL(routerHistory));
+    dispatch(openURL(q, routerHistory));
   },
 
   onClickSearchResult (q, type) {