Lists (#5703)

* Add structure for lists

* Add list timeline streaming API

* Add list APIs, bind list-account relation to follow relation

* Add API for adding/removing accounts from lists

* Add pagination to lists API

* Add pagination to list accounts API

* Adjust scopes for new APIs

- Creating and modifying lists merely requires "write" scope
- Fetching information about lists merely requires "read" scope

* Add test for wrong user context on list timeline

* Clean up tests

app/controllers/api/v1/lists/accounts_controller.rb

@@ -0,0 +1,81 @@
+# frozen_string_literal: true
+
+class Api::V1::Lists::AccountsController < Api::BaseController
+  before_action -> { doorkeeper_authorize! :read },    only: [:show]
+  before_action -> { doorkeeper_authorize! :write }, except: [:show]
+
+  before_action :require_user!
+  before_action :set_list
+
+  after_action :insert_pagination_headers, only: :show
+
+  def show
+    @accounts = @list.accounts.paginate_by_max_id(limit_param(DEFAULT_ACCOUNTS_LIMIT), params[:max_id], params[:since_id])
+    render json: @accounts, each_serializer: REST::AccountSerializer
+  end
+
+  def create
+    ApplicationRecord.transaction do
+      list_accounts.each do |account|
+        @list.accounts << account
+      end
+    end
+
+    render_empty
+  end
+
+  def destroy
+    ListAccount.where(list: @list, account_id: account_ids).destroy_all
+    render_empty
+  end
+
+  private
+
+  def set_list
+    @list = List.where(account: current_account).find(params[:list_id])
+  end
+
+  def list_accounts
+    Account.find(account_ids)
+  end
+
+  def account_ids
+    Array(resource_params[:account_ids])
+  end
+
+  def resource_params
+    params.permit(account_ids: [])
+  end
+
+  def insert_pagination_headers
+    set_pagination_headers(next_path, prev_path)
+  end
+
+  def next_path
+    if records_continue?
+      api_v1_list_accounts_url pagination_params(max_id: pagination_max_id)
+    end
+  end
+
+  def prev_path
+    unless @accounts.empty?
+      api_v1_list_accounts_url pagination_params(since_id: pagination_since_id)
+    end
+  end
+
+  def pagination_max_id
+    @accounts.last.id
+  end
+
+  def pagination_since_id
+    @accounts.first.id
+  end
+
+  def records_continue?
+    @accounts.size == limit_param(DEFAULT_ACCOUNTS_LIMIT)
+  end
+
+  def pagination_params(core_params)
+    params.permit(:limit).merge(core_params)
+  end
+end

app/controllers/api/v1/lists_controller.rb

@@ -0,0 +1,79 @@
+# frozen_string_literal: true
+
+class Api::V1::ListsController < Api::BaseController
+  LISTS_LIMIT = 50
+
+  before_action -> { doorkeeper_authorize! :read },    only: [:index, :show]
+  before_action -> { doorkeeper_authorize! :write }, except: [:index, :show]
+
+  before_action :require_user!
+  before_action :set_list, except: [:index, :create]
+
+  after_action :insert_pagination_headers, only: :index
+
+  def index
+    @lists = List.where(account: current_account).paginate_by_max_id(limit_param(LISTS_LIMIT), params[:max_id], params[:since_id])
+    render json: @lists, each_serializer: REST::ListSerializer
+  end
+
+  def show
+    render json: @list, serializer: REST::ListSerializer
+  end
+
+  def create
+    @list = List.create!(list_params.merge(account: current_account))
+    render json: @list, serializer: REST::ListSerializer
+  end
+
+  def update
+    @list.update!(list_params)
+    render json: @list, serializer: REST::ListSerializer
+  end
+
+  def destroy
+    @list.destroy!
+    render_empty
+  end
+
+  private
+
+  def set_list
+    @list = List.where(account: current_account).find(params[:id])
+  end
+
+  def list_params
+    params.permit(:title)
+  end
+
+  def insert_pagination_headers
+    set_pagination_headers(next_path, prev_path)
+  end
+
+  def next_path
+    if records_continue?
+      api_v1_lists_url pagination_params(max_id: pagination_max_id)
+    end
+  end
+
+  def prev_path
+    unless @lists.empty?
+      api_v1_lists_url pagination_params(since_id: pagination_since_id)
+    end
+  end
+
+  def pagination_max_id
+    @lists.last.id
+  end
+
+  def pagination_since_id
+    @lists.first.id
+  end
+
+  def records_continue?
+    @lists.size == limit_param(LISTS_LIMIT)
+  end
+
+  def pagination_params(core_params)
+    params.permit(:limit).merge(core_params)
+  end
+end

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

@@ -31,7 +31,7 @@ class Api::V1::Timelines::HomeController < Api::BaseController
   end
 
   def account_home_feed
-    Feed.new(:home, current_account)
+    HomeFeed.new(current_account)
   end
 
   def insert_pagination_headers

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

@@ -0,0 +1,66 @@
+# frozen_string_literal: true
+
+class Api::V1::Timelines::ListController < Api::BaseController
+  before_action -> { doorkeeper_authorize! :read }
+  before_action :require_user!
+  before_action :set_list
+  before_action :set_statuses
+
+  after_action :insert_pagination_headers, unless: -> { @statuses.empty? }
+
+  def show
+    render json: @statuses,
+           each_serializer: REST::StatusSerializer,
+           relationships: StatusRelationshipsPresenter.new(@statuses, current_user.account_id)
+  end
+
+  private
+
+  def set_list
+    @list = List.where(account: current_account).find(params[:id])
+  end
+
+  def set_statuses
+    @statuses = cached_list_statuses
+  end
+
+  def cached_list_statuses
+    cache_collection list_statuses, Status
+  end
+
+  def list_statuses
+    list_feed.get(
+      limit_param(DEFAULT_STATUSES_LIMIT),
+      params[:max_id],
+      params[:since_id]
+    )
+  end
+
+  def list_feed
+    ListFeed.new(@list)
+  end
+
+  def insert_pagination_headers
+    set_pagination_headers(next_path, prev_path)
+  end
+
+  def pagination_params(core_params)
+    params.permit(:limit).merge(core_params)
+  end
+
+  def next_path
+    api_v1_timelines_list_url params[:id], pagination_params(max_id: pagination_max_id)
+  end
+
+  def prev_path
+    api_v1_timelines_list_url params[:id], pagination_params(since_id: pagination_since_id)
+  end
+
+  def pagination_max_id
+    @statuses.last.id
+  end
+
+  def pagination_since_id
+    @statuses.first.id
+  end
+end

app/lib/feed_manager.rb

@@ -26,34 +26,42 @@ class FeedManager
     end
   end
 
-  def push(timeline_type, account, status)
+  def push_to_home(account, status)
-    return false unless add_to_feed(timeline_type, account, status)
+    return false unless add_to_feed(:home, account.id, status)
-
+    trim(:home, account.id)
-    trim(timeline_type, account.id)
+    PushUpdateWorker.perform_async(account.id, status.id, "timeline:#{account.id}") if push_update_required?("timeline:#{account.id}")
-
-    PushUpdateWorker.perform_async(account.id, status.id) if push_update_required?(timeline_type, account.id)
-
     true
   end
 
-  def unpush(timeline_type, account, status)
+  def unpush_from_home(account, status)
-    return false unless remove_from_feed(timeline_type, account, status)
+    return false unless remove_from_feed(:home, account.id, status)
+    Redis.current.publish("timeline:#{account.id}", Oj.dump(event: :delete, payload: status.id.to_s))
+    true
+  end
 
-    payload = Oj.dump(event: :delete, payload: status.id.to_s)
+  def push_to_list(list, status)
-    Redis.current.publish("timeline:#{account.id}", payload)
+    return false unless add_to_feed(:list, list.id, status)
+    trim(:list, list.id)
+    PushUpdateWorker.perform_async(list.account_id, status.id, "timeline:list:#{list.id}") if push_update_required?("timeline:list:#{list.id}")
+    true
+  end
 
+  def unpush_from_list(list, status)
+    return false unless remove_from_feed(:list, list.id, status)
+    Redis.current.publish("timeline:list:#{list.id}", Oj.dump(event: :delete, payload: status.id.to_s))
     true
   end
 
   def trim(type, account_id)
     timeline_key = key(type, account_id)
-    reblog_key = key(type, account_id, 'reblogs')
+    reblog_key   = key(type, account_id, 'reblogs')
+
     # Remove any items past the MAX_ITEMS'th entry in our feed
     redis.zremrangebyrank(timeline_key, '0', (-(FeedManager::MAX_ITEMS + 1)).to_s)
 
     # Get the score of the REBLOG_FALLOFF'th item in our feed, and stop
     # tracking anything after it for deduplication purposes.
-    falloff_rank = FeedManager::REBLOG_FALLOFF - 1
+    falloff_rank  = FeedManager::REBLOG_FALLOFF - 1
     falloff_range = redis.zrevrange(timeline_key, falloff_rank, falloff_rank, with_scores: true)
     falloff_score = falloff_range&.first&.last&.to_i || 0
 
@@ -69,10 +77,6 @@ class FeedManager
     end
   end
 
-  def push_update_required?(timeline_type, account_id)
-    timeline_type != :home || redis.get("subscribed:timeline:#{account_id}").present?
-  end
-
   def merge_into_timeline(from_account, into_account)
     timeline_key = key(:home, into_account.id)
     query        = from_account.statuses.limit(FeedManager::MAX_ITEMS / 4)
@@ -84,28 +88,28 @@ class FeedManager
 
     query.each do |status|
       next if status.direct_visibility? || filter?(:home, status, into_account)
-      add_to_feed(:home, into_account, status)
+      add_to_feed(:home, into_account.id, status)
     end
 
     trim(:home, into_account.id)
   end
 
   def unmerge_from_timeline(from_account, into_account)
-    timeline_key = key(:home, into_account.id)
+    timeline_key      = key(:home, into_account.id)
     oldest_home_score = redis.zrange(timeline_key, 0, 0, with_scores: true)&.first&.last&.to_i || 0
 
     from_account.statuses.select('id, reblog_of_id').where('id > ?', oldest_home_score).reorder(nil).find_each do |status|
-      remove_from_feed(:home, into_account, status)
+      remove_from_feed(:home, into_account.id, status)
     end
   end
 
   def clear_from_timeline(account, target_account)
-    timeline_key = key(:home, account.id)
+    timeline_key        = key(:home, account.id)
     timeline_status_ids = redis.zrange(timeline_key, 0, -1)
-    target_statuses = Status.where(id: timeline_status_ids, account: target_account)
+    target_statuses     = Status.where(id: timeline_status_ids, account: target_account)
 
     target_statuses.each do |status|
-      unpush(:home, account, status)
+      unpush_from_home(account, status)
     end
   end
 
@@ -122,7 +126,7 @@ class FeedManager
 
       statuses.each do |status|
         next if filter_from_home?(status, account)
-        added += 1 if add_to_feed(:home, account, status)
+        added += 1 if add_to_feed(:home, account.id, status)
       end
 
       break unless added.zero?
@@ -137,6 +141,10 @@ class FeedManager
     Redis.current
   end
 
+  def push_update_required?(timeline_id)
+    redis.exists("subscribed:#{timeline_id}")
+  end
+
   def filter_from_home?(status, receiver_id)
     return false if receiver_id == status.account_id
     return true  if status.reply? && (status.in_reply_to_id.nil? || status.in_reply_to_account_id.nil?)
@@ -182,9 +190,9 @@ class FeedManager
   # added, and false if it was not added to the feed. Note that this is
   # an internal helper: callers must call trim or push updates if
   # either action is appropriate.
-  def add_to_feed(timeline_type, account, status)
+  def add_to_feed(timeline_type, account_id, status)
-    timeline_key = key(timeline_type, account.id)
+    timeline_key = key(timeline_type, account_id)
-    reblog_key   = key(timeline_type, account.id, 'reblogs')
+    reblog_key   = key(timeline_type, account_id, 'reblogs')
 
     if status.reblog?
       # If the original status or a reblog of it is within
@@ -195,6 +203,7 @@ class FeedManager
       return false if !rank.nil? && rank < FeedManager::REBLOG_FALLOFF
 
       reblog_rank = redis.zrevrank(reblog_key, status.reblog_of_id)
+
       if reblog_rank.nil?
         # This is not something we've already seen reblogged, so we
         # can just add it to the feed (and note that we're
@@ -205,7 +214,7 @@ class FeedManager
         # Another reblog of the same status was already in the
         # REBLOG_FALLOFF most recent statuses, so we note that this
         # is an "extra" reblog, by storing it in reblog_set_key.
-        reblog_set_key = key(timeline_type, account.id, "reblogs:#{status.reblog_of_id}")
+        reblog_set_key = key(timeline_type, account_id, "reblogs:#{status.reblog_of_id}")
         redis.sadd(reblog_set_key, status.id)
         return false
       end
@@ -220,8 +229,8 @@ class FeedManager
   # with reblogs, and returning true if a status was removed. As with
   # `add_to_feed`, this does not trigger push updates, so callers must
   # do so if appropriate.
-  def remove_from_feed(timeline_type, account, status)
+  def remove_from_feed(timeline_type, account_id, status)
-    timeline_key = key(timeline_type, account.id)
+    timeline_key = key(timeline_type, account_id)
 
     if status.reblog?
       # 1. If the reblogging status is not in the feed, stop.
@@ -229,7 +238,7 @@ class FeedManager
       return false if status_rank.nil?
 
       # 2. Remove reblog from set of this status's reblogs.
-      reblog_set_key = key(timeline_type, account.id, "reblogs:#{status.reblog_of_id}")
+      reblog_set_key = key(timeline_type, account_id, "reblogs:#{status.reblog_of_id}")
 
       redis.srem(reblog_set_key, status.id)
       # 3. Re-insert another reblog or original into the feed if one
@@ -244,7 +253,7 @@ class FeedManager
       # (outside conditional)
     else
       # If the original is getting deleted, no use for reblog references
-      redis.del(key(timeline_type, account.id, "reblogs:#{status.id}"))
+      redis.del(key(timeline_type, account_id, "reblogs:#{status.id}"))
     end
 
     redis.zrem(timeline_key, status.id)

app/models/account.rb

@@ -3,7 +3,7 @@
 #
 # Table name: accounts
 #
-#  id                      :bigint           not null, primary key
+#  id                      :integer          not null, primary key
 #  username                :string           default(""), not null
 #  domain                  :string
 #  secret                  :string           default(""), not null
@@ -53,6 +53,7 @@ class Account < ApplicationRecord
   include AccountInteractions
   include Attachmentable
   include Remotable
+  include Paginable
 
   enum protocol: [:ostatus, :activitypub]
 
@@ -95,6 +96,10 @@ class Account < ApplicationRecord
   has_many :account_moderation_notes, dependent: :destroy
   has_many :targeted_moderation_notes, class_name: 'AccountModerationNote', foreign_key: :target_account_id, dependent: :destroy
 
+  # Lists
+  has_many :list_accounts, inverse_of: :account, dependent: :destroy
+  has_many :lists, through: :list_accounts
+
   scope :remote, -> { where.not(domain: nil) }
   scope :local, -> { where(domain: nil) }
   scope :without_followers, -> { where(followers_count: 0) }

app/models/account_domain_block.rb

@@ -3,11 +3,11 @@
 #
 # Table name: account_domain_blocks
 #
+#  id         :integer          not null, primary key
 #  domain     :string
 #  created_at :datetime         not null
 #  updated_at :datetime         not null
-#  account_id :bigint
+#  account_id :integer
-#  id         :bigint           not null, primary key
 #
 
 class AccountDomainBlock < ApplicationRecord

app/models/account_moderation_note.rb

@@ -3,10 +3,10 @@
 #
 # Table name: account_moderation_notes
 #
-#  id                :bigint           not null, primary key
+#  id                :integer          not null, primary key
 #  content           :text             not null
-#  account_id        :bigint           not null
+#  account_id        :integer          not null
-#  target_account_id :bigint           not null
+#  target_account_id :integer          not null
 #  created_at        :datetime         not null
 #  updated_at        :datetime         not null
 #

app/models/block.rb

@@ -3,11 +3,11 @@
 #
 # Table name: blocks
 #
+#  id                :integer          not null, primary key
 #  created_at        :datetime         not null
 #  updated_at        :datetime         not null
-#  account_id        :bigint           not null
+#  account_id        :integer          not null
-#  id                :bigint           not null, primary key
+#  target_account_id :integer          not null
-#  target_account_id :bigint           not null
 #
 
 class Block < ApplicationRecord

app/models/conversation.rb

@@ -3,7 +3,7 @@
 #
 # Table name: conversations
 #
-#  id         :bigint           not null, primary key
+#  id         :integer          not null, primary key
 #  uri        :string
 #  created_at :datetime         not null
 #  updated_at :datetime         not null

app/models/conversation_mute.rb

@@ -3,9 +3,9 @@
 #
 # Table name: conversation_mutes
 #
-#  conversation_id :bigint           not null
+#  id              :integer          not null, primary key
-#  account_id      :bigint           not null
+#  conversation_id :integer          not null
-#  id              :bigint           not null, primary key
+#  account_id      :integer          not null
 #
 
 class ConversationMute < ApplicationRecord

app/models/custom_emoji.rb

@@ -3,7 +3,7 @@
 #
 # Table name: custom_emojis
 #
-#  id                 :bigint           not null, primary key
+#  id                 :integer          not null, primary key
 #  shortcode          :string           default(""), not null
 #  domain             :string
 #  image_file_name    :string

app/models/domain_block.rb

@@ -3,12 +3,12 @@
 #
 # Table name: domain_blocks
 #
+#  id           :integer          not null, primary key
 #  domain       :string           default(""), not null
 #  created_at   :datetime         not null
 #  updated_at   :datetime         not null
 #  severity     :integer          default("silence")
 #  reject_media :boolean          default(FALSE), not null
-#  id           :bigint           not null, primary key
 #
 
 class DomainBlock < ApplicationRecord

app/models/email_domain_block.rb

@@ -3,7 +3,7 @@
 #
 # Table name: email_domain_blocks
 #
-#  id         :bigint           not null, primary key
+#  id         :integer          not null, primary key
 #  domain     :string           default(""), not null
 #  created_at :datetime         not null
 #  updated_at :datetime         not null

app/models/favourite.rb

@@ -3,11 +3,11 @@
 #
 # Table name: favourites
 #
+#  id         :integer          not null, primary key
 #  created_at :datetime         not null
 #  updated_at :datetime         not null
-#  account_id :bigint           not null
+#  account_id :integer          not null
-#  id         :bigint           not null, primary key
+#  status_id  :integer          not null
-#  status_id  :bigint           not null
 #
 
 class Favourite < ApplicationRecord

app/models/feed.rb

@@ -1,36 +1,27 @@
 # frozen_string_literal: true
 
 class Feed
-  def initialize(type, account)
+  def initialize(type, id)
-    @type    = type
+    @type = type
-    @account = account
+    @id   = id
   end
 
   def get(limit, max_id = nil, since_id = nil)
-    if redis.exists("account:#{@account.id}:regeneration")
+    from_redis(limit, max_id, since_id)
-      from_database(limit, max_id, since_id)
-    else
-      from_redis(limit, max_id, since_id)
-    end
   end
 
-  private
+  protected
 
   def from_redis(limit, max_id, since_id)
     max_id     = '+inf' if max_id.blank?
     since_id   = '-inf' if since_id.blank?
     unhydrated = redis.zrevrangebyscore(key, "(#{max_id}", "(#{since_id}", limit: [0, limit], with_scores: true).map(&:first).map(&:to_i)
-    Status.where(id: unhydrated).cache_ids
-  end
 
-  def from_database(limit, max_id, since_id)
+    Status.where(id: unhydrated).cache_ids
-    Status.as_home_timeline(@account)
-          .paginate_by_max_id(limit, max_id, since_id)
-          .reject { |status| FeedManager.instance.filter?(:home, status, @account.id) }
   end
 
   def key
-    FeedManager.instance.key(@type, @account.id)
+    FeedManager.instance.key(@type, @id)
   end
 
   def redis

app/models/follow.rb

@@ -3,11 +3,11 @@
 #
 # Table name: follows
 #
+#  id                :integer          not null, primary key
 #  created_at        :datetime         not null
 #  updated_at        :datetime         not null
-#  account_id        :bigint           not null
+#  account_id        :integer          not null
-#  id                :bigint           not null, primary key
+#  target_account_id :integer          not null
-#  target_account_id :bigint           not null
 #
 
 class Follow < ApplicationRecord

app/models/follow_request.rb

@@ -3,11 +3,11 @@
 #
 # Table name: follow_requests
 #
+#  id                :integer          not null, primary key
 #  created_at        :datetime         not null
 #  updated_at        :datetime         not null
-#  account_id        :bigint           not null
+#  account_id        :integer          not null
-#  id                :bigint           not null, primary key
+#  target_account_id :integer          not null
-#  target_account_id :bigint           not null
 #
 
 class FollowRequest < ApplicationRecord

app/models/home_feed.rb

@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+class HomeFeed < Feed
+  def initialize(account)
+    @type    = :home
+    @id      = account.id
+    @account = account
+  end
+
+  def get(limit, max_id = nil, since_id = nil)
+    if redis.exists("account:#{@account.id}:regeneration")
+      from_database(limit, max_id, since_id)
+    else
+      super
+    end
+  end
+
+  private
+
+  def from_database(limit, max_id, since_id)
+    Status.as_home_timeline(@account)
+          .paginate_by_max_id(limit, max_id, since_id)
+          .reject { |status| FeedManager.instance.filter?(:home, status, @account.id) }
+  end
+end

app/models/import.rb

@@ -3,6 +3,7 @@
 #
 # Table name: imports
 #
+#  id                :integer          not null, primary key
 #  type              :integer          not null
 #  approved          :boolean          default(FALSE), not null
 #  created_at        :datetime         not null
@@ -11,8 +12,7 @@
 #  data_content_type :string
 #  data_file_size    :integer
 #  data_updated_at   :datetime
-#  account_id        :bigint           not null
+#  account_id        :integer          not null
-#  id                :bigint           not null, primary key
 #
 
 class Import < ApplicationRecord

app/models/list.rb

@@ -0,0 +1,22 @@
+# frozen_string_literal: true
+# == Schema Information
+#
+# Table name: lists
+#
+#  id         :integer          not null, primary key
+#  account_id :integer
+#  title      :string           default(""), not null
+#  created_at :datetime         not null
+#  updated_at :datetime         not null
+#
+
+class List < ApplicationRecord
+  include Paginable
+
+  belongs_to :account
+
+  has_many :list_accounts, inverse_of: :list, dependent: :destroy
+  has_many :accounts, through: :list_accounts
+
+  validates :title, presence: true
+end

app/models/list_account.rb

@@ -0,0 +1,24 @@
+# frozen_string_literal: true
+# == Schema Information
+#
+# Table name: list_accounts
+#
+#  id         :integer          not null, primary key
+#  list_id    :integer          not null
+#  account_id :integer          not null
+#  follow_id  :integer          not null
+#
+
+class ListAccount < ApplicationRecord
+  belongs_to :list, required: true
+  belongs_to :account, required: true
+  belongs_to :follow, required: true
+
+  before_validation :set_follow
+
+  private
+
+  def set_follow
+    self.follow = Follow.find_by(account_id: list.account_id, target_account_id: account.id)
+  end
+end

app/models/list_feed.rb

@@ -0,0 +1,8 @@
+# frozen_string_literal: true
+
+class ListFeed < Feed
+  def initialize(list)
+    @type    = :list
+    @id      = list.id
+  end
+end

app/models/media_attachment.rb

@@ -3,19 +3,19 @@
 #
 # Table name: media_attachments
 #
-#  id                :bigint           not null, primary key
+#  id                :integer          not null, primary key
-#  status_id         :bigint
+#  status_id         :integer
 #  file_file_name    :string
 #  file_content_type :string
 #  file_file_size    :integer
 #  file_updated_at   :datetime
 #  remote_url        :string           default(""), not null
-#  account_id        :bigint
 #  created_at        :datetime         not null
 #  updated_at        :datetime         not null
 #  shortcode         :string
 #  type              :integer          default("image"), not null
 #  file_meta         :json
+#  account_id        :integer
 #  description       :text
 #
 

app/models/mention.rb

@@ -3,11 +3,11 @@
 #
 # Table name: mentions
 #
-#  status_id  :bigint
+#  id         :integer          not null, primary key
+#  status_id  :integer
 #  created_at :datetime         not null
 #  updated_at :datetime         not null
-#  account_id :bigint
+#  account_id :integer
-#  id         :bigint           not null, primary key
 #
 
 class Mention < ApplicationRecord

app/models/notification.rb

@@ -3,13 +3,13 @@
 #
 # Table name: notifications
 #
-#  id              :bigint           not null, primary key
+#  id              :integer          not null, primary key
-#  account_id      :bigint
+#  activity_id     :integer
-#  activity_id     :bigint
 #  activity_type   :string
 #  created_at      :datetime         not null
 #  updated_at      :datetime         not null
-#  from_account_id :bigint
+#  account_id      :integer
+#  from_account_id :integer
 #
 
 class Notification < ApplicationRecord

app/models/preview_card.rb

@@ -3,7 +3,7 @@
 #
 # Table name: preview_cards
 #
-#  id                 :bigint           not null, primary key
+#  id                 :integer          not null, primary key
 #  url                :string           default(""), not null
 #  title              :string           default(""), not null
 #  description        :string           default(""), not null

app/models/report.rb

@@ -3,15 +3,15 @@
 #
 # Table name: reports
 #
+#  id                         :integer          not null, primary key
 #  status_ids                 :integer          default([]), not null, is an Array
 #  comment                    :text             default(""), not null
 #  action_taken               :boolean          default(FALSE), not null
 #  created_at                 :datetime         not null
 #  updated_at                 :datetime         not null
-#  account_id                 :bigint           not null
+#  account_id                 :integer          not null
-#  action_taken_by_account_id :bigint
+#  action_taken_by_account_id :integer
-#  id                         :bigint           not null, primary key
+#  target_account_id          :integer          not null
-#  target_account_id          :bigint           not null
 #
 
 class Report < ApplicationRecord

app/models/session_activation.rb

@@ -3,15 +3,15 @@
 #
 # Table name: session_activations
 #
-#  id                       :bigint           not null, primary key
+#  id                       :integer          not null, primary key
-#  user_id                  :bigint           not null
 #  session_id               :string           not null
 #  created_at               :datetime         not null
 #  updated_at               :datetime         not null
 #  user_agent               :string           default(""), not null
 #  ip                       :inet
-#  access_token_id          :bigint
+#  access_token_id          :integer
-#  web_push_subscription_id :bigint
+#  user_id                  :integer          not null
+#  web_push_subscription_id :integer
 #
 
 #  id              :bigint           not null, primary key

app/models/setting.rb

@@ -3,13 +3,13 @@
 #
 # Table name: settings
 #
+#  id         :integer          not null, primary key
 #  var        :string           not null
 #  value      :text
 #  thing_type :string
 #  created_at :datetime
 #  updated_at :datetime
-#  id         :bigint           not null, primary key
+#  thing_id   :integer
-#  thing_id   :bigint
 #
 
 class Setting < RailsSettings::Base

app/models/site_upload.rb

@@ -3,7 +3,7 @@
 #
 # Table name: site_uploads
 #
-#  id                :bigint           not null, primary key
+#  id                :integer          not null, primary key
 #  var               :string           default(""), not null
 #  file_file_name    :string
 #  file_content_type :string

app/models/status.rb

@@ -3,26 +3,26 @@
 #
 # Table name: statuses
 #
-#  id                     :bigint           not null, primary key
+#  id                     :integer          not null, primary key
 #  uri                    :string
-#  account_id             :bigint           not null
 #  text                   :text             default(""), not null
 #  created_at             :datetime         not null
 #  updated_at             :datetime         not null
-#  in_reply_to_id         :bigint
+#  in_reply_to_id         :integer
-#  reblog_of_id           :bigint
+#  reblog_of_id           :integer
 #  url                    :string
 #  sensitive              :boolean          default(FALSE), not null
 #  visibility             :integer          default("public"), not null
-#  in_reply_to_account_id :bigint
-#  application_id         :bigint
 #  spoiler_text           :text             default(""), not null
 #  reply                  :boolean          default(FALSE), not null
 #  favourites_count       :integer          default(0), not null
 #  reblogs_count          :integer          default(0), not null
 #  language               :string
-#  conversation_id        :bigint
+#  conversation_id        :integer
 #  local                  :boolean
+#  account_id             :integer          not null
+#  application_id         :integer
+#  in_reply_to_account_id :integer
 #
 
 class Status < ApplicationRecord

app/models/status_pin.rb

@@ -3,9 +3,9 @@
 #
 # Table name: status_pins
 #
-#  id         :bigint           not null, primary key
+#  id         :integer          not null, primary key
-#  account_id :bigint           not null
+#  account_id :integer          not null
-#  status_id  :bigint           not null
+#  status_id  :integer          not null
 #  created_at :datetime         not null
 #  updated_at :datetime         not null
 #

app/models/stream_entry.rb

@@ -3,13 +3,13 @@
 #
 # Table name: stream_entries
 #
-#  activity_id   :bigint
+#  id            :integer          not null, primary key
+#  activity_id   :integer
 #  activity_type :string
 #  created_at    :datetime         not null
 #  updated_at    :datetime         not null
 #  hidden        :boolean          default(FALSE), not null
-#  account_id    :bigint
+#  account_id    :integer
-#  id            :bigint           not null, primary key
 #
 
 class StreamEntry < ApplicationRecord

app/models/subscription.rb

@@ -3,6 +3,7 @@
 #
 # Table name: subscriptions
 #
+#  id                          :integer          not null, primary key
 #  callback_url                :string           default(""), not null
 #  secret                      :string
 #  expires_at                  :datetime
@@ -11,8 +12,7 @@
 #  updated_at                  :datetime         not null
 #  last_successful_delivery_at :datetime
 #  domain                      :string
-#  account_id                  :bigint           not null
+#  account_id                  :integer          not null
-#  id                          :bigint           not null, primary key
 #
 
 class Subscription < ApplicationRecord

app/models/tag.rb

@@ -3,7 +3,7 @@
 #
 # Table name: tags
 #
-#  id         :bigint           not null, primary key
+#  id         :integer          not null, primary key
 #  name       :string           default(""), not null
 #  created_at :datetime         not null
 #  updated_at :datetime         not null

app/models/user.rb

@@ -3,7 +3,7 @@
 #
 # Table name: users
 #
-#  id                        :bigint           not null, primary key
+#  id                        :integer          not null, primary key
 #  email                     :string           default(""), not null
 #  created_at                :datetime         not null
 #  updated_at                :datetime         not null
@@ -30,7 +30,7 @@
 #  last_emailed_at           :datetime
 #  otp_backup_codes          :string           is an Array
 #  filtered_languages        :string           default([]), not null, is an Array
-#  account_id                :bigint           not null
+#  account_id                :integer          not null
 #  disabled                  :boolean          default(FALSE), not null
 #  moderator                 :boolean          default(FALSE), not null
 #

app/models/web/push_subscription.rb

@@ -3,7 +3,7 @@
 #
 # Table name: web_push_subscriptions
 #
-#  id         :bigint           not null, primary key
+#  id         :integer          not null, primary key
 #  endpoint   :string           not null
 #  key_p256dh :string           not null
 #  key_auth   :string           not null

app/models/web/setting.rb

@@ -3,11 +3,11 @@
 #
 # Table name: web_settings
 #
+#  id         :integer          not null, primary key
 #  data       :json
 #  created_at :datetime         not null
 #  updated_at :datetime         not null
-#  id         :bigint           not null, primary key
+#  user_id    :integer
-#  user_id    :bigint
 #
 
 class Web::Setting < ApplicationRecord

app/serializers/rest/list_serializer.rb

@@ -0,0 +1,5 @@
+# frozen_string_literal: true
+
+class REST::ListSerializer < ActiveModel::Serializer
+  attributes :id, :title
+end

app/services/batched_remove_status_service.rb

@@ -30,6 +30,7 @@ class BatchedRemoveStatusService < BaseService
       account = account_statuses.first.account
 
       unpush_from_home_timelines(account, account_statuses)
+      unpush_from_list_timelines(account, account_statuses)
 
       if account.local?
         batch_stream_entries(account, account_statuses)
@@ -79,7 +80,15 @@ class BatchedRemoveStatusService < BaseService
 
     recipients.each do |follower|
       statuses.each do |status|
-        FeedManager.instance.unpush(:home, follower, status)
+        FeedManager.instance.unpush_from_home(follower, status)
+      end
+    end
+  end
+
+  def unpush_from_list_timelines(account, statuses)
+    account.lists.select(:id, :account_id).each do |list|
+      statuses.each do |status|
+        FeedManager.instance.unpush_from_list(list, status)
       end
     end
   end

app/services/fan_out_on_write_service.rb

@@ -14,6 +14,7 @@ class FanOutOnWriteService < BaseService
       deliver_to_mentioned_followers(status)
     else
       deliver_to_followers(status)
+      deliver_to_lists(status)
     end
 
     return if status.account.silenced? || !status.public_visibility? || status.reblog?
@@ -30,7 +31,7 @@ class FanOutOnWriteService < BaseService
 
   def deliver_to_self(status)
     Rails.logger.debug "Delivering status #{status.id} to author"
-    FeedManager.instance.push(:home, status.account, status)
+    FeedManager.instance.push_to_home(status.account, status)
   end
 
   def deliver_to_followers(status)
@@ -38,7 +39,17 @@ class FanOutOnWriteService < BaseService
 
     status.account.followers.where(domain: nil).joins(:user).where('users.current_sign_in_at > ?', 14.days.ago).select(:id).reorder(nil).find_in_batches do |followers|
       FeedInsertWorker.push_bulk(followers) do |follower|
-        [status.id, follower.id]
+        [status.id, follower.id, :home]
+      end
+    end
+  end
+
+  def deliver_to_lists(status)
+    Rails.logger.debug "Delivering status #{status.id} to lists"
+
+    status.account.lists.joins(account: :user).where('users.current_sign_in_at > ?', 14.days.ago).select(:id).reorder(nil).find_in_batches do |lists|
+      FeedInsertWorker.push_bulk(lists) do |list|
+        [status.id, list.id, :list]
       end
     end
   end
@@ -49,7 +60,7 @@ class FanOutOnWriteService < BaseService
     status.mentions.includes(:account).each do |mention|
       mentioned_account = mention.account
       next if !mentioned_account.local? || !mentioned_account.following?(status.account) || FeedManager.instance.filter?(:home, status, mention.account_id)
-      FeedManager.instance.push(:home, mentioned_account, status)
+      FeedManager.instance.push_to_home(mentioned_account, status)
     end
   end
 

app/services/remove_status_service.rb

@@ -14,6 +14,7 @@ class RemoveStatusService < BaseService
 
     remove_from_self if status.account.local?
     remove_from_followers
+    remove_from_lists
     remove_from_affected
     remove_reblogs
     remove_from_hashtags
@@ -30,12 +31,18 @@ class RemoveStatusService < BaseService
   private
 
   def remove_from_self
-    unpush(:home, @account, @status)
+    FeedManager.instance.unpush_from_home(@account, @status)
   end
 
   def remove_from_followers
     @account.followers.local.find_each do |follower|
-      unpush(:home, follower, @status)
+      FeedManager.instance.unpush_from_home(follower, @status)
+    end
+  end
+
+  def remove_from_lists
+    @account.lists.select(:id, :account_id).find_each do |list|
+      FeedManager.instance.unpush_from_list(list, @status)
     end
   end
 
@@ -101,10 +108,6 @@ class RemoveStatusService < BaseService
     end
   end
 
-  def unpush(type, receiver, status)
-    FeedManager.instance.unpush(type, receiver, status)
-  end
-
   def remove_from_hashtags
     return unless @status.public_visibility?
 

app/workers/feed_insert_worker.rb

@@ -3,34 +3,41 @@
 class FeedInsertWorker
   include Sidekiq::Worker
 
-  attr_reader :status, :follower
+  def perform(status_id, id, type = :home)
-
+    @type     = type.to_sym
-  def perform(status_id, follower_id)
+    @status   = Status.find(status_id)
-    @status = Status.find_by(id: status_id)
+
-    @follower = Account.find_by(id: follower_id)
+    case @type
+    when :home
+      @follower = Account.find(id)
+    when :list
+      @list     = List.find(id)
+      @follower = @list.account
+    end
 
     check_and_insert
+  rescue ActiveRecord::RecordNotFound
+    true
   end
 
   private
 
   def check_and_insert
-    if records_available?
+    perform_push unless feed_filtered?
-      perform_push unless feed_filtered?
-    else
-      true
-    end
-  end
-
-  def records_available?
-    status.present? && follower.present?
   end
 
   def feed_filtered?
-    FeedManager.instance.filter?(:home, status, follower.id)
+    # Note: Lists are a variation of home, so the filtering rules
+    # of home apply to both
+    FeedManager.instance.filter?(:home, @status, @follower.id)
   end
 
   def perform_push
-    FeedManager.instance.push(:home, follower, status)
+    case @type
+    when :home
+      FeedManager.instance.push_to_home(@follower, @status)
+    when :list
+      FeedManager.instance.push_to_list(@list, @status)
+    end
   end
 end

app/workers/push_update_worker.rb

@@ -3,12 +3,13 @@
 class PushUpdateWorker
   include Sidekiq::Worker
 
-  def perform(account_id, status_id)
+  def perform(account_id, status_id, timeline_id = nil)
-    account = Account.find(account_id)
+    account     = Account.find(account_id)
-    status  = Status.find(status_id)
+    status      = Status.find(status_id)
-    message = InlineRenderer.render(status, account, :status)
+    message     = InlineRenderer.render(status, account, :status)
+    timeline_id = "timeline:#{account.id}" if timeline_id.nil?
 
-    Redis.current.publish("timeline:#{account.id}", Oj.dump(event: :update, payload: message, queued_at: (Time.now.to_f * 1000.0).to_i))
+    Redis.current.publish(timeline_id, Oj.dump(event: :update, payload: message, queued_at: (Time.now.to_f * 1000.0).to_i))
   rescue ActiveRecord::RecordNotFound
     true
   end

config/routes.rb

@@ -212,6 +212,7 @@ Rails.application.routes.draw do
         resource :home, only: :show, controller: :home
         resource :public, only: :show, controller: :public
         resources :tag, only: :show
+        resources :list, only: :show
       end
 
       resources :streaming, only: [:index]
@@ -270,6 +271,10 @@ Rails.application.routes.draw do
           post :unmute
         end
       end
+
+      resources :lists, only: [:index, :create, :show, :update, :destroy] do
+        resource :accounts, only: [:show, :create, :destroy], controller: 'lists/accounts'
+      end
     end
 
     namespace :web do

db/migrate/20171114231651_create_lists.rb

@@ -0,0 +1,10 @@
+class CreateLists < ActiveRecord::Migration[5.1]
+  def change
+    create_table :lists do |t|
+      t.references :account, foreign_key: { on_delete: :cascade }
+      t.string :title, null: false, default: ''
+
+      t.timestamps
+    end
+  end
+end

db/migrate/20171116161857_create_list_accounts.rb

@@ -0,0 +1,12 @@
+class CreateListAccounts < ActiveRecord::Migration[5.1]
+  def change
+    create_table :list_accounts do |t|
+      t.belongs_to :list, foreign_key: { on_delete: :cascade }, null: false
+      t.belongs_to :account, foreign_key: { on_delete: :cascade }, null: false
+      t.belongs_to :follow, foreign_key: { on_delete: :cascade }, null: false
+    end
+
+    add_index :list_accounts, [:account_id, :list_id], unique: true
+    add_index :list_accounts, [:list_id, :account_id]
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20171114080328) do
+ActiveRecord::Schema.define(version: 20171116161857) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -170,6 +170,25 @@ ActiveRecord::Schema.define(version: 20171114080328) do
     t.bigint "account_id", null: false
   end
 
+  create_table "list_accounts", force: :cascade do |t|
+    t.bigint "list_id", null: false
+    t.bigint "account_id", null: false
+    t.bigint "follow_id", null: false
+    t.index ["account_id", "list_id"], name: "index_list_accounts_on_account_id_and_list_id", unique: true
+    t.index ["account_id"], name: "index_list_accounts_on_account_id"
+    t.index ["follow_id"], name: "index_list_accounts_on_follow_id"
+    t.index ["list_id", "account_id"], name: "index_list_accounts_on_list_id_and_account_id"
+    t.index ["list_id"], name: "index_list_accounts_on_list_id"
+  end
+
+  create_table "lists", force: :cascade do |t|
+    t.bigint "account_id"
+    t.string "title", default: "", null: false
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+    t.index ["account_id"], name: "index_lists_on_account_id"
+  end
+
   create_table "media_attachments", force: :cascade do |t|
     t.bigint "status_id"
     t.string "file_file_name"
@@ -478,6 +497,10 @@ ActiveRecord::Schema.define(version: 20171114080328) do
   add_foreign_key "follows", "accounts", column: "target_account_id", name: "fk_745ca29eac", on_delete: :cascade
   add_foreign_key "follows", "accounts", name: "fk_32ed1b5560", on_delete: :cascade
   add_foreign_key "imports", "accounts", name: "fk_6db1b6e408", on_delete: :cascade
+  add_foreign_key "list_accounts", "accounts", on_delete: :cascade
+  add_foreign_key "list_accounts", "follows", on_delete: :cascade
+  add_foreign_key "list_accounts", "lists", on_delete: :cascade
+  add_foreign_key "lists", "accounts", on_delete: :cascade
   add_foreign_key "media_attachments", "accounts", name: "fk_96dd81e81b", on_delete: :nullify
   add_foreign_key "media_attachments", "statuses", on_delete: :nullify
   add_foreign_key "mentions", "accounts", name: "fk_970d43f9d1", on_delete: :cascade

spec/controllers/api/v1/lists/accounts_controller_spec.rb

@@ -0,0 +1,54 @@
+require 'rails_helper'
+
+describe Api::V1::Lists::AccountsController do
+  render_views
+
+  let(:user)  { Fabricate(:user, account: Fabricate(:account, username: 'alice')) }
+  let(:token) { Fabricate(:accessible_access_token, resource_owner_id: user.id, scopes: 'read write') }
+  let(:list)  { Fabricate(:list, account: user.account) }
+
+  before do
+    follow = Fabricate(:follow, account: user.account)
+    list.accounts << follow.target_account
+    allow(controller).to receive(:doorkeeper_token) { token }
+  end
+
+  describe 'GET #index' do
+    it 'returns http success' do
+      get :show, params: { list_id: list.id }
+
+      expect(response).to have_http_status(:success)
+    end
+  end
+
+  describe 'POST #create' do
+    let(:bob) { Fabricate(:account, username: 'bob') }
+
+    before do
+      user.account.follow!(bob)
+      post :create, params: { list_id: list.id, account_ids: [bob.id] }
+    end
+
+    it 'returns http success' do
+      expect(response).to have_http_status(:success)
+    end
+
+    it 'adds account to the list' do
+      expect(list.accounts.include?(bob)).to be true
+    end
+  end
+
+  describe 'DELETE #destroy' do
+    before do
+      delete :destroy, params: { list_id: list.id, account_ids: [list.accounts.first.id] }
+    end
+
+    it 'returns http success' do
+      expect(response).to have_http_status(:success)
+    end
+
+    it 'removes account from the list' do
+      expect(list.accounts.count).to eq 0
+    end
+  end
+end

spec/controllers/api/v1/lists_controller_spec.rb

@@ -0,0 +1,68 @@
+require 'rails_helper'
+
+RSpec.describe Api::V1::ListsController, type: :controller do
+  render_views
+
+  let!(:user)  { Fabricate(:user, account: Fabricate(:account, username: 'alice')) }
+  let!(:token) { Fabricate(:accessible_access_token, resource_owner_id: user.id, scopes: 'read write') }
+  let!(:list)  { Fabricate(:list, account: user.account) }
+
+  before { allow(controller).to receive(:doorkeeper_token) { token } }
+
+  describe 'GET #index' do
+    it 'returns http success' do
+      get :index
+      expect(response).to have_http_status(:success)
+    end
+  end
+
+  describe 'GET #show' do
+    it 'returns http success' do
+      get :show, params: { id: list.id }
+      expect(response).to have_http_status(:success)
+    end
+  end
+
+  describe 'POST #create' do
+    before do
+      post :create, params: { title: 'Foo bar' }
+    end
+
+    it 'returns http success' do
+      expect(response).to have_http_status(:success)
+    end
+
+    it 'creates list' do
+      expect(List.where(account: user.account).count).to eq 2
+      expect(List.last.title).to eq 'Foo bar'
+    end
+  end
+
+  describe 'PUT #update' do
+    before do
+      put :update, params: { id: list.id, title: 'Updated title' }
+    end
+
+    it 'returns http success' do
+      expect(response).to have_http_status(:success)
+    end
+
+    it 'updates the list' do
+      expect(list.reload.title).to eq 'Updated title'
+    end
+  end
+
+  describe 'DELETE #destroy' do
+    before do
+      delete :destroy, params: { id: list.id }
+    end
+
+    it 'returns http success' do
+      expect(response).to have_http_status(:success)
+    end
+
+    it 'deletes the list' do
+      expect(List.find_by(id: list.id)).to be_nil
+    end
+  end
+end

spec/controllers/api/v1/timelines/list_controller_spec.rb

@@ -0,0 +1,56 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+describe Api::V1::Timelines::ListController do
+  render_views
+
+  let(:user) { Fabricate(:user, account: Fabricate(:account, username: 'alice')) }
+  let(:list) { Fabricate(:list, account: user.account) }
+
+  before do
+    allow(controller).to receive(:doorkeeper_token) { token }
+  end
+
+  context 'with a user context' do
+    let(:token) { Fabricate(:accessible_access_token, resource_owner_id: user.id, scopes: 'read') }
+
+    describe 'GET #show' do
+      before do
+        follow = Fabricate(:follow, account: user.account)
+        list.accounts << follow.target_account
+        PostStatusService.new.call(follow.target_account, 'New status for user home timeline.')
+      end
+
+      it 'returns http success' do
+        get :show, params: { id: list.id }
+        expect(response).to have_http_status(:success)
+      end
+    end
+  end
+
+  context 'with the wrong user context' do
+    let(:other_user) { Fabricate(:user, account: Fabricate(:account, username: 'bob')) }
+    let(:token)      { Fabricate(:accessible_access_token, resource_owner_id: other_user.id, scopes: 'read') }
+
+    describe 'GET #show' do
+      it 'returns http not found' do
+        get :show, params: { id: list.id }
+        expect(response).to have_http_status(:not_found)
+      end
+    end
+  end
+
+  context 'without a user context' do
+    let(:token) { Fabricate(:accessible_access_token, resource_owner_id: nil, scopes: 'read') }
+
+    describe 'GET #show' do
+      it 'returns http unprocessable entity' do
+        get :show, params: { id: list.id }
+
+        expect(response).to have_http_status(:unprocessable_entity)
+        expect(response.headers['Link']).to be_nil
+      end
+    end
+  end
+end

spec/controllers/api/v1/timelines/tag_controller_spec.rb

@@ -5,7 +5,7 @@ require 'rails_helper'
 describe Api::V1::Timelines::TagController do
   render_views
 
-  let(:user)  { Fabricate(:user, account: Fabricate(:account, username: 'alice')) }
+  let(:user) { Fabricate(:user, account: Fabricate(:account, username: 'alice')) }
 
   before do
     allow(controller).to receive(:doorkeeper_token) { token }

spec/fabricators/list_account_fabricator.rb

@@ -0,0 +1,5 @@
+Fabricator(:list_account) do
+  list    nil
+  account nil
+  follow  nil
+end

spec/fabricators/list_fabricator.rb

@@ -0,0 +1,4 @@
+Fabricator(:list) do
+  account nil
+  title   "MyString"
+end

spec/lib/feed_manager_spec.rb

@@ -148,21 +148,11 @@ RSpec.describe FeedManager do
       account = Fabricate(:account)
       status = Fabricate(:status)
       members = FeedManager::MAX_ITEMS.times.map { |count| [count, count] }
-      Redis.current.zadd("feed:type:#{account.id}", members)
+      Redis.current.zadd("feed:home:#{account.id}", members)
 
-      FeedManager.instance.push('type', account, status)
+      FeedManager.instance.push_to_home(account, status)
 
-      expect(Redis.current.zcard("feed:type:#{account.id}")).to eq FeedManager::MAX_ITEMS
+      expect(Redis.current.zcard("feed:home:#{account.id}")).to eq FeedManager::MAX_ITEMS
-    end
-
-    it 'sends push updates for non-home timelines' do
-      account = Fabricate(:account)
-      status = Fabricate(:status)
-      allow(Redis.current).to receive_messages(publish: nil)
-
-      FeedManager.instance.push('type', account, status)
-
-      expect(Redis.current).to have_received(:publish).with("timeline:#{account.id}", any_args).at_least(:once)
     end
 
     context 'reblogs' do
@@ -171,7 +161,7 @@ RSpec.describe FeedManager do
         reblogged = Fabricate(:status)
         reblog = Fabricate(:status, reblog: reblogged)
 
-        expect(FeedManager.instance.push('type', account, reblog)).to be true
+        expect(FeedManager.instance.push_to_home(account, reblog)).to be true
       end
 
       it 'does not save a new reblog of a recent status' do
@@ -179,9 +169,9 @@ RSpec.describe FeedManager do
         reblogged = Fabricate(:status)
         reblog = Fabricate(:status, reblog: reblogged)
 
-        FeedManager.instance.push('type', account, reblogged)
+        FeedManager.instance.push_to_home(account, reblogged)
 
-        expect(FeedManager.instance.push('type', account, reblog)).to be false
+        expect(FeedManager.instance.push_to_home(account, reblog)).to be false
       end
 
       it 'saves a new reblog of an old status' do
@@ -189,14 +179,14 @@ RSpec.describe FeedManager do
         reblogged = Fabricate(:status)
         reblog = Fabricate(:status, reblog: reblogged)
 
-        FeedManager.instance.push('type', account, reblogged)
+        FeedManager.instance.push_to_home(account, reblogged)
 
         # Fill the feed with intervening statuses
         FeedManager::REBLOG_FALLOFF.times do
-          FeedManager.instance.push('type', account, Fabricate(:status))
+          FeedManager.instance.push_to_home(account, Fabricate(:status))
         end
 
-        expect(FeedManager.instance.push('type', account, reblog)).to be true
+        expect(FeedManager.instance.push_to_home(account, reblog)).to be true
       end
 
       it 'does not save a new reblog of a recently-reblogged status' do
@@ -205,10 +195,10 @@ RSpec.describe FeedManager do
         reblogs = 2.times.map { Fabricate(:status, reblog: reblogged) }
 
         # The first reblog will be accepted
-        FeedManager.instance.push('type', account, reblogs.first)
+        FeedManager.instance.push_to_home(account, reblogs.first)
 
         # The second reblog should be ignored
-        expect(FeedManager.instance.push('type', account, reblogs.last)).to be false
+        expect(FeedManager.instance.push_to_home(account, reblogs.last)).to be false
       end
 
       it 'does not save a new reblog of a multiply-reblogged-then-unreblogged status' do
@@ -217,14 +207,14 @@ RSpec.describe FeedManager do
         reblogs = 3.times.map { Fabricate(:status, reblog: reblogged) }
 
         # Accept the reblogs
-        FeedManager.instance.push('type', account, reblogs[0])
+        FeedManager.instance.push_to_home(account, reblogs[0])
-        FeedManager.instance.push('type', account, reblogs[1])
+        FeedManager.instance.push_to_home(account, reblogs[1])
 
         # Unreblog the first one
-        FeedManager.instance.unpush('type', account, reblogs[0])
+        FeedManager.instance.unpush_from_home(account, reblogs[0])
 
         # The last reblog should still be ignored
-        expect(FeedManager.instance.push('type', account, reblogs.last)).to be false
+        expect(FeedManager.instance.push_to_home(account, reblogs.last)).to be false
       end
 
       it 'saves a new reblog of a long-ago-reblogged status' do
@@ -233,15 +223,15 @@ RSpec.describe FeedManager do
         reblogs = 2.times.map { Fabricate(:status, reblog: reblogged) }
 
         # The first reblog will be accepted
-        FeedManager.instance.push('type', account, reblogs.first)
+        FeedManager.instance.push_to_home(account, reblogs.first)
 
         # Fill the feed with intervening statuses
         FeedManager::REBLOG_FALLOFF.times do
-          FeedManager.instance.push('type', account, Fabricate(:status))
+          FeedManager.instance.push_to_home(account, Fabricate(:status))
         end
 
         # The second reblog should also be accepted
-        expect(FeedManager.instance.push('type', account, reblogs.last)).to be true
+        expect(FeedManager.instance.push_to_home(account, reblogs.last)).to be true
       end
     end
   end
@@ -253,11 +243,11 @@ RSpec.describe FeedManager do
       reblogged      = Fabricate(:status)
       status         = Fabricate(:status, reblog: reblogged)
       another_status = Fabricate(:status, reblog: reblogged)
-      reblogs_key    = FeedManager.instance.key('type', receiver.id, 'reblogs')
+      reblogs_key    = FeedManager.instance.key('home', receiver.id, 'reblogs')
-      reblog_set_key = FeedManager.instance.key('type', receiver.id, "reblogs:#{reblogged.id}")
+      reblog_set_key = FeedManager.instance.key('home', receiver.id, "reblogs:#{reblogged.id}")
 
-      FeedManager.instance.push('type', receiver, status)
+      FeedManager.instance.push_to_home(receiver, status)
-      FeedManager.instance.push('type', receiver, another_status)
+      FeedManager.instance.push_to_home(receiver, another_status)
 
       # We should have a tracking set and an entry in reblogs.
       expect(Redis.current.exists(reblog_set_key)).to be true
@@ -265,12 +255,12 @@ RSpec.describe FeedManager do
 
       # Push everything off the end of the feed.
       FeedManager::MAX_ITEMS.times do
-        FeedManager.instance.push('type', receiver, Fabricate(:status))
+        FeedManager.instance.push_to_home(receiver, Fabricate(:status))
       end
 
       # `trim` should be called automatically, but do it anyway, as
       # we're testing `trim`, not side effects of `push`.
-      FeedManager.instance.trim('type', receiver.id)
+      FeedManager.instance.trim('home', receiver.id)
 
       # We should not have any reblog tracking data.
       expect(Redis.current.exists(reblog_set_key)).to be false
@@ -285,32 +275,32 @@ RSpec.describe FeedManager do
       reblogged = Fabricate(:status)
       status    = Fabricate(:status, reblog: reblogged)
 
-      FeedManager.instance.push('type', receiver, reblogged)
+      FeedManager.instance.push_to_home(receiver, reblogged)
-      FeedManager::REBLOG_FALLOFF.times { FeedManager.instance.push('type', receiver, Fabricate(:status)) }
+      FeedManager::REBLOG_FALLOFF.times { FeedManager.instance.push_to_home(receiver, Fabricate(:status)) }
-      FeedManager.instance.push('type', receiver, status)
+      FeedManager.instance.push_to_home(receiver, status)
 
       # The reblogging status should show up under normal conditions.
-      expect(Redis.current.zrange("feed:type:#{receiver.id}", 0, -1)).to include(status.id.to_s)
+      expect(Redis.current.zrange("feed:home:#{receiver.id}", 0, -1)).to include(status.id.to_s)
 
-      FeedManager.instance.unpush('type', receiver, status)
+      FeedManager.instance.unpush_from_home(receiver, status)
 
       # Restore original status
-      expect(Redis.current.zrange("feed:type:#{receiver.id}", 0, -1)).to_not include(status.id.to_s)
+      expect(Redis.current.zrange("feed:home:#{receiver.id}", 0, -1)).to_not include(status.id.to_s)
-      expect(Redis.current.zrange("feed:type:#{receiver.id}", 0, -1)).to include(reblogged.id.to_s)
+      expect(Redis.current.zrange("feed:home:#{receiver.id}", 0, -1)).to include(reblogged.id.to_s)
     end
 
     it 'removes a reblogged status if it was only reblogged once' do
       reblogged = Fabricate(:status)
       status    = Fabricate(:status, reblog: reblogged)
 
-      FeedManager.instance.push('type', receiver, status)
+      FeedManager.instance.push_to_home(receiver, status)
 
       # The reblogging status should show up under normal conditions.
-      expect(Redis.current.zrange("feed:type:#{receiver.id}", 0, -1)).to eq [status.id.to_s]
+      expect(Redis.current.zrange("feed:home:#{receiver.id}", 0, -1)).to eq [status.id.to_s]
 
-      FeedManager.instance.unpush('type', receiver, status)
+      FeedManager.instance.unpush_from_home(receiver, status)
 
-      expect(Redis.current.zrange("feed:type:#{receiver.id}", 0, -1)).to be_empty
+      expect(Redis.current.zrange("feed:home:#{receiver.id}", 0, -1)).to be_empty
     end
 
     it 'leaves a multiply-reblogged status if another reblog was in feed' do
@@ -318,26 +308,26 @@ RSpec.describe FeedManager do
       reblogs   = 3.times.map { Fabricate(:status, reblog: reblogged) }
 
       reblogs.each do |reblog|
-        FeedManager.instance.push('type', receiver, reblog)
+        FeedManager.instance.push_to_home(receiver, reblog)
       end
 
       # The reblogging status should show up under normal conditions.
-      expect(Redis.current.zrange("feed:type:#{receiver.id}", 0, -1)).to eq [reblogs.first.id.to_s]
+      expect(Redis.current.zrange("feed:home:#{receiver.id}", 0, -1)).to eq [reblogs.first.id.to_s]
 
       reblogs[0...-1].each do |reblog|
-        FeedManager.instance.unpush('type', receiver, reblog)
+        FeedManager.instance.unpush_from_home(receiver, reblog)
       end
 
-      expect(Redis.current.zrange("feed:type:#{receiver.id}", 0, -1)).to eq [reblogs.last.id.to_s]
+      expect(Redis.current.zrange("feed:home:#{receiver.id}", 0, -1)).to eq [reblogs.last.id.to_s]
     end
 
     it 'sends push updates' do
       status  = Fabricate(:status)
 
-      FeedManager.instance.push('type', receiver, status)
+      FeedManager.instance.push_to_home(receiver, status)
 
       allow(Redis.current).to receive_messages(publish: nil)
-      FeedManager.instance.unpush('type', receiver, status)
+      FeedManager.instance.unpush_from_home(receiver, status)
 
       deletion = Oj.dump(event: :delete, payload: status.id.to_s)
       expect(Redis.current).to have_received(:publish).with("timeline:#{receiver.id}", deletion)

spec/models/account_moderation_note_spec.rb

@@ -1,5 +1,5 @@
 require 'rails_helper'
 
 RSpec.describe AccountModerationNote, type: :model do
-  pending "add some examples to (or delete) #{__FILE__}"
+
 end

spec/models/home_feed_spec.rb

@@ -1,9 +1,9 @@
 require 'rails_helper'
 
-RSpec.describe Feed, type: :model do
+RSpec.describe HomeFeed, type: :model do
   let(:account) { Fabricate(:account) }
 
-  subject { described_class.new(:home, account) }
+  subject { described_class.new(account) }
 
   describe '#get' do
     before do

spec/models/list_account_spec.rb

@@ -0,0 +1,5 @@
+require 'rails_helper'
+
+RSpec.describe ListAccount, type: :model do
+
+end

spec/models/list_spec.rb

@@ -0,0 +1,5 @@
+require 'rails_helper'
+
+RSpec.describe List, type: :model do
+
+end

spec/services/after_block_service_spec.rb

@@ -18,8 +18,8 @@ RSpec.describe AfterBlockService do
     end
 
     it "clears account's statuses" do
-      FeedManager.instance.push(:home, account, status)
+      FeedManager.instance.push_to_home(account, status)
-      FeedManager.instance.push(:home, account, other_account_status)
+      FeedManager.instance.push_to_home(account, other_account_status)
 
       is_expected.to change {
         Redis.current.zrange(home_timeline_key, 0, -1)

spec/services/batched_remove_status_service_spec.rb

@@ -30,11 +30,11 @@ RSpec.describe BatchedRemoveStatusService do
   end
 
   it 'removes statuses from author\'s home feed' do
-    expect(Feed.new(:home, alice).get(10)).to_not include([status1.id, status2.id])
+    expect(HomeFeed.new(alice).get(10)).to_not include([status1.id, status2.id])
   end
 
   it 'removes statuses from local follower\'s home feed' do
-    expect(Feed.new(:home, jeff).get(10)).to_not include([status1.id, status2.id])
+    expect(HomeFeed.new(jeff).get(10)).to_not include([status1.id, status2.id])
   end
 
   it 'notifies streaming API of followers' do

spec/services/fan_out_on_write_service_spec.rb

@@ -19,12 +19,12 @@ RSpec.describe FanOutOnWriteService do
   end
 
   it 'delivers status to home timeline' do
-    expect(Feed.new(:home, author).get(10).map(&:id)).to include status.id
+    expect(HomeFeed.new(author).get(10).map(&:id)).to include status.id
   end
 
   it 'delivers status to local followers' do
     pending 'some sort of problem in test environment causes this to sometimes fail'
-    expect(Feed.new(:home, follower).get(10).map(&:id)).to include status.id
+    expect(HomeFeed.new(follower).get(10).map(&:id)).to include status.id
   end
 
   it 'delivers status to hashtag' do

spec/services/mute_service_spec.rb

@@ -18,8 +18,8 @@ RSpec.describe MuteService do
     end
 
     it "clears account's statuses" do
-      FeedManager.instance.push(:home, account, status)
+      FeedManager.instance.push_to_home(account, status)
-      FeedManager.instance.push(:home, account, other_account_status)
+      FeedManager.instance.push_to_home(account, other_account_status)
 
       is_expected.to change {
         Redis.current.zrange(home_timeline_key, 0, -1)

spec/services/remove_status_service_spec.rb

@@ -25,11 +25,11 @@ RSpec.describe RemoveStatusService do
   end
 
   it 'removes status from author\'s home feed' do
-    expect(Feed.new(:home, alice).get(10)).to_not include(@status.id)
+    expect(HomeFeed.new(alice).get(10)).to_not include(@status.id)
   end
 
   it 'removes status from local follower\'s home feed' do
-    expect(Feed.new(:home, jeff).get(10)).to_not include(@status.id)
+    expect(HomeFeed.new(jeff).get(10)).to_not include(@status.id)
   end
 
   it 'sends PuSH update to PuSH subscribers' do

spec/workers/feed_insert_worker_spec.rb

@@ -11,41 +11,41 @@ describe FeedInsertWorker do
 
     context 'when there are no records' do
       it 'skips push with missing status' do
-        instance = double(push: nil)
+        instance = double(push_to_home: nil)
         allow(FeedManager).to receive(:instance).and_return(instance)
         result = subject.perform(nil, follower.id)
 
         expect(result).to eq true
-        expect(instance).not_to have_received(:push)
+        expect(instance).not_to have_received(:push_to_home)
       end
 
       it 'skips push with missing account' do
-        instance = double(push: nil)
+        instance = double(push_to_home: nil)
         allow(FeedManager).to receive(:instance).and_return(instance)
         result = subject.perform(status.id, nil)
 
         expect(result).to eq true
-        expect(instance).not_to have_received(:push)
+        expect(instance).not_to have_received(:push_to_home)
       end
     end
 
     context 'when there are real records' do
       it 'skips the push when there is a filter' do
-        instance = double(push: nil, filter?: true)
+        instance = double(push_to_home: nil, filter?: true)
         allow(FeedManager).to receive(:instance).and_return(instance)
         result = subject.perform(status.id, follower.id)
 
         expect(result).to be_nil
-        expect(instance).not_to have_received(:push)
+        expect(instance).not_to have_received(:push_to_home)
       end
 
       it 'pushes the status onto the home timeline without filter' do
-        instance = double(push: nil, filter?: false)
+        instance = double(push_to_home: nil, filter?: false)
         allow(FeedManager).to receive(:instance).and_return(instance)
         result = subject.perform(status.id, follower.id)
 
         expect(result).to be_nil
-        expect(instance).to have_received(:push).with(:home, follower, status)
+        expect(instance).to have_received(:push_to_home).with(follower, status)
       end
     end
   end

streaming/index.js

@@ -254,6 +254,26 @@ const startWorker = (workerId) => {
 
   const placeholders = (arr, shift = 0) => arr.map((_, i) => `$${i + 1 + shift}`).join(', ');
 
+  const authorizeListAccess = (id, req, next) => {
+    pgPool.connect((err, client, done) => {
+      if (err) {
+        next(false);
+        return;
+      }
+
+      client.query('SELECT id, account_id FROM lists WHERE id = $1 LIMIT 1', [id], (err, result) => {
+        done();
+
+        if (err || result.rows.length === 0 || result.rows[0].account_id !== req.accountId) {
+          next(false);
+          return;
+        }
+
+        next(true);
+      });
+    });
+  };
+
   const streamFrom = (id, req, output, attachCloseHandler, needsFiltering = false, notificationOnly = false) => {
     const streamType = notificationOnly ? ' (notification)' : '';
     log.verbose(req.requestId, `Starting stream from ${id} for ${req.accountId}${streamType}`);
@@ -410,7 +430,22 @@ const startWorker = (workerId) => {
     streamFrom(`timeline:hashtag:${req.query.tag.toLowerCase()}:local`, req, streamToHttp(req, res), streamHttpEnd(req), true);
   });
 
-  const wss    = new WebSocket.Server({ server, verifyClient: wsVerifyClient });
+  app.get('/api/v1/streaming/list', (req, res) => {
+    const listId = req.query.list;
+
+    authorizeListAccess(listId, req, authorized => {
+      if (!authorized) {
+        res.writeHead(404, { 'Content-Type': 'application/json' });
+        res.end(JSON.stringify({ error: 'Not found' }));
+        return;
+      }
+
+      const channel = `timeline:list:${listId}`;
+      streamFrom(channel, req, streamToHttp(req, res), streamHttpEnd(req, subscriptionHeartbeat(channel)));
+    });
+  });
+
+  const wss = new WebSocket.Server({ server, verifyClient: wsVerifyClient });
 
   wss.on('connection', ws => {
     const req      = ws.upgradeReq;
@@ -443,6 +478,19 @@ const startWorker = (workerId) => {
     case 'hashtag:local':
       streamFrom(`timeline:hashtag:${location.query.tag.toLowerCase()}:local`, req, streamToWs(req, ws), streamWsEnd(req, ws), true);
       break;
+    case 'list':
+      const listId = location.query.list;
+
+      authorizeListAccess(listId, req, authorized => {
+        if (!authorized) {
+          ws.close();
+          return;
+        }
+
+        const channel = `timeline:list:${listId}`;
+        streamFrom(channel, req, streamToWs(req, ws), streamWsEnd(req, ws, subscriptionHeartbeat(channel)));
+      });
+      break;
     default:
       ws.close();
     }