Merge tag 'v4.0.0rc1'

app/serializers/activitypub/add_serializer.rb

@@ -1,10 +1,29 @@
 # frozen_string_literal: true
 
 class ActivityPub::AddSerializer < ActivityPub::Serializer
+  class UriSerializer < ActiveModel::Serializer
+    include RoutingHelper
+
+    def serializable_hash(*_args)
+      ActivityPub::TagManager.instance.uri_for(object)
+    end
+  end
+
+  def self.serializer_for(model, options)
+    case model.class.name
+    when 'Status'
+      UriSerializer
+    when 'FeaturedTag'
+      ActivityPub::HashtagSerializer
+    else
+      super
+    end
+  end
+
   include RoutingHelper
 
   attributes :type, :actor, :target
-  attribute :proper_object, key: :object
+  has_one :proper_object, key: :object
 
   def type
     'Add'
@@ -15,7 +34,7 @@ class ActivityPub::AddSerializer < ActivityPub::Serializer
   end
 
   def proper_object
-    ActivityPub::TagManager.instance.uri_for(object)
+    object
   end
 
   def target

app/serializers/activitypub/hashtag_serializer.rb

@@ -1,6 +1,8 @@
 # frozen_string_literal: true
 
 class ActivityPub::HashtagSerializer < ActivityPub::Serializer
+  context_extensions :hashtag
+
   include RoutingHelper
 
   attributes :type, :href, :name
@@ -10,11 +12,11 @@ class ActivityPub::HashtagSerializer < ActivityPub::Serializer
   end
 
   def name
-    "##{object.name}"
+    "##{object.display_name}"
   end
 
   def href
-    if object.class.name == 'FeaturedTag'
+    if object.instance_of?(FeaturedTag)
       short_account_tag_url(object.account, object.tag)
     else
       tag_url(object)

app/serializers/activitypub/public_key_serializer.rb

@@ -6,7 +6,7 @@ class ActivityPub::PublicKeySerializer < ActivityPub::Serializer
   attributes :id, :owner, :public_key_pem
 
   def id
-    [ActivityPub::TagManager.instance.uri_for(object), '#main-key'].join
+    ActivityPub::TagManager.instance.key_uri_for(object)
   end
 
   def owner

app/serializers/activitypub/remove_serializer.rb

@@ -1,10 +1,29 @@
 # frozen_string_literal: true
 
 class ActivityPub::RemoveSerializer < ActivityPub::Serializer
+  class UriSerializer < ActiveModel::Serializer
+    include RoutingHelper
+
+    def serializable_hash(*_args)
+      ActivityPub::TagManager.instance.uri_for(object)
+    end
+  end
+
+  def self.serializer_for(model, options)
+    case model.class.name
+    when 'Status'
+      UriSerializer
+    when 'FeaturedTag'
+      ActivityPub::HashtagSerializer
+    else
+      super
+    end
+  end
+
   include RoutingHelper
 
   attributes :type, :actor, :target
-  attribute :proper_object, key: :object
+  has_one :proper_object, key: :object
 
   def type
     'Remove'
@@ -15,7 +34,7 @@ class ActivityPub::RemoveSerializer < ActivityPub::Serializer
   end
 
   def proper_object
-    ActivityPub::TagManager.instance.uri_for(object)
+    object
   end
 
   def target

app/serializers/initial_state_serializer.rb

@@ -1,33 +1,37 @@
 # frozen_string_literal: true
 
 class InitialStateSerializer < ActiveModel::Serializer
+  include RoutingHelper
+
   attributes :meta, :compose, :accounts,
              :media_attachments, :settings,
              :languages, :max_toot_chars
 
   has_one :push_subscription, serializer: REST::WebPushSubscriptionSerializer
+  has_one :role, serializer: REST::RoleSerializer
 
-  def max_toot_chars
-    StatusLengthValidator::MAX_CHARS
-  end
-
+  # rubocop:disable Metrics/AbcSize
   def meta
     store = {
       streaming_api_base_url: Rails.configuration.x.streaming_api_base_url,
       access_token: object.token,
       locale: I18n.locale,
-      domain: Rails.configuration.x.local_domain,
-      title: instance_presenter.site_title,
+      domain: instance_presenter.domain,
+      title: instance_presenter.title,
       admin: object.admin&.id&.to_s,
       search_enabled: Chewy.enabled?,
       repository: Mastodon::Version.repository,
-      source_url: Mastodon::Version.source_url,
-      version: Mastodon::Version.to_s,
-      invites_enabled: Setting.min_invite_role == 'user',
+      source_url: instance_presenter.source_url,
+      version: instance_presenter.version,
       limited_federation_mode: Rails.configuration.x.whitelist_mode,
       mascot: instance_presenter.mascot&.file&.url,
       profile_directory: Setting.profile_directory,
       trends: Setting.trends,
+      registrations_open: Setting.registrations_mode != 'none' && !Rails.configuration.x.single_user_mode,
+      timeline_preview: Setting.timeline_preview,
+      activity_api_enabled: Setting.activity_api_enabled,
+      single_user_mode: Rails.configuration.x.single_user_mode,
+      translation_enabled: TranslationService.configured?,
     }
 
     if object.current_account
@@ -43,7 +47,6 @@ class InitialStateSerializer < ActiveModel::Serializer
       store[:advanced_layout]   = object.current_account.user.setting_advanced_layout
       store[:use_blurhash]      = object.current_account.user.setting_use_blurhash
       store[:use_pending_items] = object.current_account.user.setting_use_pending_items
-      store[:is_staff]          = object.current_account.user.staff?
       store[:trends]            = Setting.trends && object.current_account.user.setting_trends
       store[:crop_images]       = object.current_account.user.setting_crop_images
     else
@@ -54,8 +57,16 @@ class InitialStateSerializer < ActiveModel::Serializer
       store[:crop_images]   = Setting.crop_images
     end
 
+    store[:disabled_account_id] = object.disabled_account.id.to_s if object.disabled_account
+    store[:moved_to_account_id] = object.moved_to_account.id.to_s if object.moved_to_account
+
+    if Rails.configuration.x.single_user_mode
+      store[:owner] = object.owner&.id&.to_s
+    end
+
     store
   end
+  # rubocop:enable Metrics/AbcSize
 
   def compose
     store = {}
@@ -74,8 +85,15 @@ class InitialStateSerializer < ActiveModel::Serializer
 
   def accounts
     store = {}
-    store[object.current_account.id.to_s] = ActiveModelSerializers::SerializableResource.new(object.current_account, serializer: REST::AccountSerializer) if object.current_account
-    store[object.admin.id.to_s]           = ActiveModelSerializers::SerializableResource.new(object.admin, serializer: REST::AccountSerializer) if object.admin
+
+    ActiveRecord::Associations::Preloader.new.preload([object.current_account, object.admin, object.owner, object.disabled_account, object.moved_to_account].compact, [:account_stat, :user, { moved_to_account: [:account_stat, :user] }])
+
+    store[object.current_account.id.to_s]  = ActiveModelSerializers::SerializableResource.new(object.current_account, serializer: REST::AccountSerializer) if object.current_account
+    store[object.admin.id.to_s]            = ActiveModelSerializers::SerializableResource.new(object.admin, serializer: REST::AccountSerializer) if object.admin
+    store[object.owner.id.to_s]            = ActiveModelSerializers::SerializableResource.new(object.owner, serializer: REST::AccountSerializer) if object.owner
+    store[object.disabled_account.id.to_s] = ActiveModelSerializers::SerializableResource.new(object.disabled_account, serializer: REST::AccountSerializer) if object.disabled_account
+    store[object.moved_to_account.id.to_s] = ActiveModelSerializers::SerializableResource.new(object.moved_to_account, serializer: REST::AccountSerializer) if object.moved_to_account
+
     store
   end
 

app/serializers/manifest_serializer.rb

@@ -4,35 +4,43 @@ class ManifestSerializer < ActiveModel::Serializer
   include RoutingHelper
   include ActionView::Helpers::TextHelper
 
-  attributes :name, :short_name, :description,
+  ICON_SIZES = %w(
+    36
+    48
+    72
+    96
+    144
+    192
+    256
+    384
+    512
+  ).freeze
+
+  attributes :name, :short_name,
              :icons, :theme_color, :background_color,
              :display, :start_url, :scope,
              :share_target, :shortcuts
 
   def name
-    object.site_title
+    object.title
   end
 
   def short_name
-    object.site_title
-  end
-
-  def description
-    strip_tags(object.site_short_description.presence || I18n.t('about.about_mastodon_html'))
+    object.title
   end
 
   def icons
-    [
+    ICON_SIZES.map do |size|
       {
-        src: '/android-chrome-192x192.png',
-        sizes: '192x192',
+        src: full_pack_url("media/icons/android-chrome-#{size}x#{size}.png"),
+        sizes: "#{size}x#{size}",
         type: 'image/png',
-      },
-    ]
+      }
+    end
   end
 
   def theme_color
-    '#282c37'
+    '#191b22'
   end
 
   def background_color
@@ -44,7 +52,7 @@ class ManifestSerializer < ActiveModel::Serializer
   end
 
   def start_url
-    '/web/home'
+    '/home'
   end
 
   def scope
@@ -68,37 +76,12 @@ class ManifestSerializer < ActiveModel::Serializer
   def shortcuts
     [
       {
-        name: 'New toot',
-        url: '/web/publish',
-        icons: [
-          {
-            src: '/shortcuts/new-status.png',
-            type: 'image/png',
-            sizes: '192x192',
-          },
-        ],
+        name: 'Compose new post',
+        url: '/publish',
       },
       {
         name: 'Notifications',
-        url: '/web/notifications',
-        icons: [
-          {
-            src: '/shortcuts/notifications.png',
-            type: 'image/png',
-            sizes: '192x192',
-          },
-        ],
-      },
-      {
-        name: 'Direct messages',
-        url: '/web/conversations',
-        icons: [
-          {
-            src: '/shortcuts/direct.png',
-            type: 'image/png',
-            sizes: '192x192',
-          },
-        ],
+        url: '/notifications',
       },
     ]
   end

app/serializers/nodeinfo/serializer.rb

@@ -3,7 +3,7 @@
 class NodeInfo::Serializer < ActiveModel::Serializer
   include RoutingHelper
 
-  attributes :version, :software, :protocols, :usage, :open_registrations
+  attributes :version, :software, :protocols, :services, :usage, :open_registrations, :metadata
 
   def version
     '2.0'
@@ -37,6 +37,10 @@ class NodeInfo::Serializer < ActiveModel::Serializer
     Setting.registrations_mode != 'none' && !Rails.configuration.x.single_user_mode
   end
 
+  def metadata
+    []
+  end
+
   private
 
   def instance_presenter

app/serializers/rest/account_serializer.rb

@@ -14,6 +14,7 @@ class REST::AccountSerializer < ActiveModel::Serializer
 
   attribute :suspended, if: :suspended?
   attribute :silenced, key: :limited, if: :silenced?
+  attribute :noindex, if: :local?
 
   class FieldSerializer < ActiveModel::Serializer
     include FormattingHelper
@@ -103,7 +104,11 @@ class REST::AccountSerializer < ActiveModel::Serializer
     object.silenced?
   end
 
-  delegate :suspended?, :silenced?, to: :object
+  def noindex
+    object.user_prefers_noindex?
+  end
+
+  delegate :suspended?, :silenced?, :local?, to: :object
 
   def moved_and_not_nested?
     object.moved? && object.moved_to_account.moved_to_account_id.nil?

app/serializers/rest/admin/account_serializer.rb

@@ -77,6 +77,6 @@ class REST::Admin::AccountSerializer < ActiveModel::Serializer
   end
 
   def ip
-    ips&.first
+    ips&.first&.ip
   end
 end

app/serializers/rest/admin/canonical_email_block_serializer.rb

@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+class REST::Admin::CanonicalEmailBlockSerializer < ActiveModel::Serializer
+  attributes :id, :canonical_email_hash
+
+  def id
+    object.id.to_s
+  end
+end

app/serializers/rest/admin/domain_allow_serializer.rb

@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+class REST::Admin::DomainAllowSerializer < ActiveModel::Serializer
+  attributes :id, :domain, :created_at
+
+  def id
+    object.id.to_s
+  end
+end

app/serializers/rest/admin/domain_block_serializer.rb

@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+class REST::Admin::DomainBlockSerializer < ActiveModel::Serializer
+  attributes :id, :domain, :created_at, :severity,
+             :reject_media, :reject_reports,
+             :private_comment, :public_comment, :obfuscate
+
+  def id
+    object.id.to_s
+  end
+end

app/serializers/rest/admin/email_domain_block_serializer.rb

@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+class REST::Admin::EmailDomainBlockSerializer < ActiveModel::Serializer
+  attributes :id, :domain, :created_at, :history
+
+  def id
+    object.id.to_s
+  end
+end

app/serializers/rest/admin/existing_domain_block_error_serializer.rb

@@ -0,0 +1,15 @@
+# frozen_string_literal: true
+
+class REST::Admin::ExistingDomainBlockErrorSerializer < ActiveModel::Serializer
+  attributes :error
+
+  has_one :existing_domain_block, serializer: REST::Admin::DomainBlockSerializer
+
+  def error
+    I18n.t('admin.domain_blocks.existing_domain_block', name: existing_domain_block.domain)
+  end
+
+  def existing_domain_block
+    object
+  end
+end

app/serializers/rest/admin/ip_block_serializer.rb

@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+
+class REST::Admin::IpBlockSerializer < ActiveModel::Serializer
+  attributes :id, :ip, :severity, :comment,
+             :created_at, :expires_at
+
+  def id
+    object.id.to_s
+  end
+
+  def ip
+    "#{object.ip}/#{object.ip.prefix}"
+  end
+end

app/serializers/rest/admin/report_serializer.rb

@@ -1,7 +1,8 @@
 # frozen_string_literal: true
 
 class REST::Admin::ReportSerializer < ActiveModel::Serializer
-  attributes :id, :action_taken, :category, :comment, :created_at, :updated_at
+  attributes :id, :action_taken, :action_taken_at, :category, :comment,
+             :forwarded, :created_at, :updated_at
 
   has_one :account, serializer: REST::Admin::AccountSerializer
   has_one :target_account, serializer: REST::Admin::AccountSerializer

app/serializers/rest/admin/webhook_event_serializer.rb

@@ -0,0 +1,26 @@
+# frozen_string_literal: true
+
+class REST::Admin::WebhookEventSerializer < ActiveModel::Serializer
+  def self.serializer_for(model, options)
+    case model.class.name
+    when 'Account'
+      REST::Admin::AccountSerializer
+    when 'Report'
+      REST::Admin::ReportSerializer
+    else
+      super
+    end
+  end
+
+  attributes :event, :created_at
+
+  has_one :virtual_object, key: :object
+
+  def virtual_object
+    object.object
+  end
+
+  def event
+    object.type
+  end
+end

app/serializers/rest/credential_account_serializer.rb

@@ -3,6 +3,8 @@
 class REST::CredentialAccountSerializer < REST::AccountSerializer
   attributes :source
 
+  has_one :role, serializer: REST::RoleSerializer
+
   def source
     user = object.user
 
@@ -15,4 +17,8 @@ class REST::CredentialAccountSerializer < REST::AccountSerializer
       follow_requests_count: FollowRequest.where(target_account: object).limit(40).count,
     }
   end
+
+  def role
+    object.user_role
+  end
 end

app/serializers/rest/domain_block_serializer.rb

@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+class REST::DomainBlockSerializer < ActiveModel::Serializer
+  attributes :domain, :digest, :severity, :comment
+
+  def domain
+    object.public_domain
+  end
+
+  def digest
+    object.domain_digest
+  end
+
+  def comment
+    object.public_comment if instance_options[:with_comment]
+  end
+end

app/serializers/rest/extended_description_serializer.rb

@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+
+class REST::ExtendedDescriptionSerializer < ActiveModel::Serializer
+  attributes :updated_at, :content
+
+  def updated_at
+    object.updated_at&.iso8601
+  end
+
+  def content
+    if object.text.present?
+      markdown.render(object.text)
+    else
+      ''
+    end
+  end
+
+  private
+
+  def markdown
+    @markdown ||= Redcarpet::Markdown.new(Redcarpet::Render::HTML)
+  end
+end

app/serializers/rest/featured_tag_serializer.rb

@@ -12,4 +12,16 @@ class REST::FeaturedTagSerializer < ActiveModel::Serializer
   def url
     short_account_tag_url(object.account, object.tag)
   end
+
+  def name
+    object.display_name
+  end
+
+  def statuses_count
+    object.statuses_count.to_s
+  end
+
+  def last_status_at
+    object.last_status_at&.to_date&.iso8601
+  end
 end

app/serializers/rest/filter_keyword_serializer.rb

@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+class REST::FilterKeywordSerializer < ActiveModel::Serializer
+  attributes :id, :keyword, :whole_word
+
+  def id
+    object.id.to_s
+  end
+end

app/serializers/rest/filter_result_serializer.rb

@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+class REST::FilterResultSerializer < ActiveModel::Serializer
+  belongs_to :filter, serializer: REST::FilterSerializer
+  has_many :keyword_matches
+  has_many :status_matches
+
+  def status_matches
+    object.status_matches&.map(&:to_s)
+  end
+end

app/serializers/rest/filter_serializer.rb

@@ -1,10 +1,15 @@
 # frozen_string_literal: true
 
 class REST::FilterSerializer < ActiveModel::Serializer
-  attributes :id, :phrase, :context, :whole_word, :expires_at,
-             :irreversible
+  attributes :id, :title, :context, :expires_at, :filter_action
+  has_many :keywords, serializer: REST::FilterKeywordSerializer, if: :rules_requested?
+  has_many :statuses, serializer: REST::FilterStatusSerializer, if: :rules_requested?
 
   def id
     object.id.to_s
   end
+
+  def rules_requested?
+    instance_options[:rules_requested]
+  end
 end

app/serializers/rest/filter_status_serializer.rb

@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+class REST::FilterStatusSerializer < ActiveModel::Serializer
+  attributes :id, :status_id
+
+  def id
+    object.id.to_s
+  end
+
+  def status_id
+    object.status_id.to_s
+  end
+end

app/serializers/rest/instance_serializer.rb

@@ -1,65 +1,56 @@
 # frozen_string_literal: true
 
 class REST::InstanceSerializer < ActiveModel::Serializer
+  class ContactSerializer < ActiveModel::Serializer
+    attributes :email
+
+    has_one :account, serializer: REST::AccountSerializer
+  end
+
   include RoutingHelper
 
-  attributes :uri, :title, :short_description, :description, :email,
-             :version, :urls, :stats, :thumbnail, :max_toot_chars,
-             :languages, :registrations, :approval_required, :invites_enabled,
-             :configuration
-
-  has_one :contact_account, serializer: REST::AccountSerializer
+  attributes :domain, :title, :version, :source_url, :description,
+             :usage, :thumbnail, :languages, :configuration,
+             :registrations
 
+  has_one :contact, serializer: ContactSerializer
   has_many :rules, serializer: REST::RuleSerializer
 
-  delegate :contact_account, :rules, to: :instance_presenter
-
-  def max_toot_chars
-    StatusLengthValidator::MAX_CHARS
-  end
-
-  def uri
-    Rails.configuration.x.local_domain
-  end
-
-  def title
-    Setting.site_title
-  end
-
-  def short_description
-    Setting.site_short_description
-  end
-
-  def description
-    Setting.site_description
-  end
-
-  def email
-    Setting.site_contact_email
-  end
-
-  def version
-    Mastodon::Version.to_s
-  end
-
   def thumbnail
-    instance_presenter.thumbnail ? full_asset_url(instance_presenter.thumbnail.file.url) : full_pack_url('media/images/preview.jpg')
+    if object.thumbnail
+      {
+        url: full_asset_url(object.thumbnail.file.url(:'@1x')),
+        blurhash: object.thumbnail.blurhash,
+        versions: {
+          '@1x': full_asset_url(object.thumbnail.file.url(:'@1x')),
+          '@2x': full_asset_url(object.thumbnail.file.url(:'@2x')),
+        },
+      }
+    else
+      {
+        url: full_pack_url('media/images/preview.png'),
+      }
+    end
   end
 
-  def stats
+  def usage
     {
-      user_count: instance_presenter.user_count,
-      status_count: instance_presenter.status_count,
-      domain_count: instance_presenter.domain_count,
+      users: {
+        active_month: object.active_user_count(4),
+      },
     }
   end
 
-  def urls
-    { streaming_api: Rails.configuration.x.streaming_api_base_url }
-  end
-
   def configuration
     {
+      urls: {
+        streaming: Rails.configuration.x.streaming_api_base_url,
+      },
+
+      accounts: {
+        max_featured_tags: FeaturedTag::LIMIT,
+      },
+
       statuses: {
         max_characters: StatusLengthValidator::MAX_CHARS,
         max_media_attachments: 4,
@@ -81,28 +72,36 @@ class REST::InstanceSerializer < ActiveModel::Serializer
         min_expiration: PollValidator::MIN_EXPIRATION,
         max_expiration: PollValidator::MAX_EXPIRATION,
       },
+
+      translation: {
+        enabled: TranslationService.configured?,
+      },
     }
   end
 
-  def languages
-    [I18n.default_locale]
-  end
-
   def registrations
-    Setting.registrations_mode != 'none' && !Rails.configuration.x.single_user_mode
-  end
-
-  def approval_required
-    Setting.registrations_mode == 'approved'
-  end
-
-  def invites_enabled
-    Setting.min_invite_role == 'user'
+    {
+      enabled: registrations_enabled?,
+      approval_required: Setting.registrations_mode == 'approved',
+      message: registrations_enabled? ? nil : registrations_message,
+    }
   end
 
   private
 
-  def instance_presenter
-    @instance_presenter ||= InstancePresenter.new
+  def registrations_enabled?
+    Setting.registrations_mode != 'none' && !Rails.configuration.x.single_user_mode
+  end
+
+  def registrations_message
+    if Setting.closed_registrations_message.present?
+      markdown.render(Setting.closed_registrations_message)
+    else
+      nil
+    end
+  end
+
+  def markdown
+    @markdown ||= Redcarpet::Markdown.new(Redcarpet::Render::HTML, no_images: true)
   end
 end

app/serializers/rest/notification_serializer.rb

@@ -5,6 +5,7 @@ class REST::NotificationSerializer < ActiveModel::Serializer
 
   belongs_to :from_account, key: :account, serializer: REST::AccountSerializer
   belongs_to :target_status, key: :status, if: :status_type?, serializer: REST::StatusSerializer
+  belongs_to :report, if: :report_type?, serializer: REST::ReportSerializer
 
   def id
     object.id.to_s
@@ -13,4 +14,8 @@ class REST::NotificationSerializer < ActiveModel::Serializer
   def status_type?
     [:favourite, :reblog, :status, :mention, :poll, :update].include?(object.type)
   end
+
+  def report_type?
+    object.type == :'admin.report'
+  end
 end

app/serializers/rest/privacy_policy_serializer.rb

@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+
+class REST::PrivacyPolicySerializer < ActiveModel::Serializer
+  attributes :updated_at, :content
+
+  def updated_at
+    object.updated_at.iso8601
+  end
+
+  def content
+    markdown.render(object.text % { domain: Rails.configuration.x.local_domain })
+  end
+
+  private
+
+  def markdown
+    @markdown ||= Redcarpet::Markdown.new(Redcarpet::Render::HTML, escape_html: true, no_images: true)
+  end
+end

app/serializers/rest/relationship_serializer.rb

@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 class REST::RelationshipSerializer < ActiveModel::Serializer
-  attributes :id, :following, :showing_reblogs, :notifying, :followed_by,
+  attributes :id, :following, :showing_reblogs, :notifying, :languages, :followed_by,
              :blocking, :blocked_by, :muting, :muting_notifications, :requested,
              :domain_blocking, :endorsed, :note
 
@@ -25,6 +25,11 @@ class REST::RelationshipSerializer < ActiveModel::Serializer
       false
   end
 
+  def languages
+    (instance_options[:relationships].following[object.id] || {})[:languages] ||
+      (instance_options[:relationships].requested[object.id] || {})[:languages]
+  end
+
   def followed_by
     instance_options[:relationships].followed_by[object.id] || false
   end

app/serializers/rest/report_serializer.rb

@@ -1,7 +1,10 @@
 # frozen_string_literal: true
 
 class REST::ReportSerializer < ActiveModel::Serializer
-  attributes :id, :action_taken
+  attributes :id, :action_taken, :action_taken_at, :category, :comment,
+             :forwarded, :created_at, :status_ids, :rule_ids
+
+  has_one :target_account, serializer: REST::AccountSerializer
 
   def id
     object.id.to_s

app/serializers/rest/role_serializer.rb

@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+class REST::RoleSerializer < ActiveModel::Serializer
+  attributes :id, :name, :permissions, :color, :highlighted
+
+  def id
+    object.id.to_s
+  end
+
+  def permissions
+    object.computed_permissions.to_s
+  end
+end

app/serializers/rest/status_serializer.rb

@@ -13,6 +13,7 @@ class REST::StatusSerializer < ActiveModel::Serializer
   attribute :muted, if: :current_user?
   attribute :bookmarked, if: :current_user?
   attribute :pinned, if: :pinnable?
+  has_many :filtered, serializer: REST::FilterResultSerializer, if: :current_user?
 
   attribute :content, unless: :source_requested?
   attribute :text, if: :source_requested?
@@ -120,6 +121,14 @@ class REST::StatusSerializer < ActiveModel::Serializer
     end
   end
 
+  def filtered
+    if instance_options && instance_options[:relationships]
+      instance_options[:relationships].filters_map[object.id] || []
+    else
+      current_user.account.status_matches_filters(object)
+    end
+  end
+
   def pinnable?
     current_user? &&
       current_user.account_id == object.account_id &&

app/serializers/rest/tag_serializer.rb

@@ -5,7 +5,25 @@ class REST::TagSerializer < ActiveModel::Serializer
 
   attributes :name, :url, :history
 
+  attribute :following, if: :current_user?
+
   def url
     tag_url(object)
   end
+
+  def name
+    object.display_name
+  end
+
+  def following
+    if instance_options && instance_options[:relationships]
+      instance_options[:relationships].following_map[object.id] || false
+    else
+      TagFollow.where(tag_id: object.id, account_id: current_user.account_id).exists?
+    end
+  end
+
+  def current_user?
+    !current_user.nil?
+  end
 end

app/serializers/rest/translation_serializer.rb

@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+class REST::TranslationSerializer < ActiveModel::Serializer
+  attributes :content, :detected_source_language, :provider
+
+  def content
+    object.text
+  end
+end

app/serializers/rest/v1/filter_serializer.rb

@@ -0,0 +1,26 @@
+# frozen_string_literal: true
+
+class REST::V1::FilterSerializer < ActiveModel::Serializer
+  attributes :id, :phrase, :context, :whole_word, :expires_at,
+             :irreversible
+
+  delegate :context, :expires_at, to: :custom_filter
+
+  def id
+    object.id.to_s
+  end
+
+  def phrase
+    object.keyword
+  end
+
+  def irreversible
+    custom_filter.irreversible?
+  end
+
+  private
+
+  def custom_filter
+    object.custom_filter
+  end
+end

app/serializers/rest/v1/instance_serializer.rb

@@ -0,0 +1,106 @@
+# frozen_string_literal: true
+
+class REST::V1::InstanceSerializer < ActiveModel::Serializer
+  include RoutingHelper
+
+  attributes :uri, :title, :short_description, :description, :email,
+             :version, :urls, :stats, :thumbnail,
+             :languages, :registrations, :approval_required, :invites_enabled,
+             :configuration
+
+  has_one :contact_account, serializer: REST::AccountSerializer
+
+  has_many :rules, serializer: REST::RuleSerializer
+
+  def uri
+    object.domain
+  end
+
+  def short_description
+    object.description
+  end
+
+  def description
+    Setting.site_description # Legacy
+  end
+
+  def email
+    object.contact.email
+  end
+
+  def contact_account
+    object.contact.account
+  end
+
+  def thumbnail
+    instance_presenter.thumbnail ? full_asset_url(instance_presenter.thumbnail.file.url(:'@1x')) : full_pack_url('media/images/preview.png')
+  end
+
+  def stats
+    {
+      user_count: instance_presenter.user_count,
+      status_count: instance_presenter.status_count,
+      domain_count: instance_presenter.domain_count,
+    }
+  end
+
+  def urls
+    { streaming_api: Rails.configuration.x.streaming_api_base_url }
+  end
+
+  def usage
+    {
+      users: {
+        active_month: instance_presenter.active_user_count(4),
+      },
+    }
+  end
+
+  def configuration
+    {
+      accounts: {
+        max_featured_tags: FeaturedTag::LIMIT,
+      },
+
+      statuses: {
+        max_characters: StatusLengthValidator::MAX_CHARS,
+        max_media_attachments: 4,
+        characters_reserved_per_url: StatusLengthValidator::URL_PLACEHOLDER_CHARS,
+      },
+
+      media_attachments: {
+        supported_mime_types: MediaAttachment::IMAGE_MIME_TYPES + MediaAttachment::VIDEO_MIME_TYPES + MediaAttachment::AUDIO_MIME_TYPES,
+        image_size_limit: MediaAttachment::IMAGE_LIMIT,
+        image_matrix_limit: Attachmentable::MAX_MATRIX_LIMIT,
+        video_size_limit: MediaAttachment::VIDEO_LIMIT,
+        video_frame_rate_limit: MediaAttachment::MAX_VIDEO_FRAME_RATE,
+        video_matrix_limit: MediaAttachment::MAX_VIDEO_MATRIX_LIMIT,
+      },
+
+      polls: {
+        max_options: PollValidator::MAX_OPTIONS,
+        max_characters_per_option: PollValidator::MAX_OPTION_CHARS,
+        min_expiration: PollValidator::MIN_EXPIRATION,
+        max_expiration: PollValidator::MAX_EXPIRATION,
+      },
+    }
+  end
+
+  def registrations
+    Setting.registrations_mode != 'none' && !Rails.configuration.x.single_user_mode
+  end
+
+  def approval_required
+    Setting.registrations_mode == 'approved'
+  end
+
+  def invites_enabled
+    UserRole.everyone.can?(:invite_users)
+  end
+
+  private
+
+  def instance_presenter
+    @instance_presenter ||= InstancePresenter.new
+  end
+end