Account domain blocks (#2381)

* Add <ostatus:conversation /> tag to Atom input/output

Only uses ref attribute (not href) because href would be
the alternate link that's always included also.

Creates new conversation for every non-reply status. Carries
over conversation for every reply. Keeps remote URIs verbatim,
generates local URIs on the fly like the rest of them.

* Conversation muting - prevents notifications that reference a conversation
(including replies, favourites, reblogs) from being created. API endpoints
/api/v1/statuses/:id/mute and /api/v1/statuses/:id/unmute

Currently no way to tell when a status/conversation is muted, so the web UI
only has a "disable notifications" button, doesn't work as a toggle

* Display "Dismiss notifications" on all statuses in notifications column, not just own

* Add "muted" as a boolean attribute on statuses JSON

For now always false on contained reblogs, since it's only relevant for
statuses returned from the notifications endpoint, which are not nested

Remove "Disable notifications" from detailed status view, since it's
only relevant in the notifications column

* Up max class length

* Remove pending test for conversation mute

* Add tests, clean up

* Rename to "mute conversation" and "unmute conversation"

* Raise validation error when trying to mute/unmute status without conversation

* Adding account domain blocks that filter notifications and public timelines

* Add tests for domain blocks in notifications, public timelines
Filter reblogs of blocked domains from home

* Add API for listing and creating account domain blocks

* API for creating/deleting domain blocks, tests for Status#ancestors
and Status#descendants, filter domain blocks from them

* Filter domains in streaming API

* Update account_domain_block_spec.rb

3 files changed, 131 insertions, 0 deletions

diff --git a/app/models/concerns/account_avatar.rb b/app/models/concerns/account_avatar.rb
index c664366ef..73507a328 100644
--- a/app/models/concerns/account_avatar.rb
+++ b/app/models/concerns/account_avatar.rb
@@ -2,6 +2,7 @@
 
 module AccountAvatar
   extend ActiveSupport::Concern
+
   IMAGE_MIME_TYPES = ['image/jpeg', 'image/png', 'image/gif'].freeze
 
   class_methods do
@@ -10,6 +11,7 @@ module AccountAvatar
       styles[:static] = { format: 'png' } if file.content_type == 'image/gif'
       styles
     end
+
     private :avatar_styles
   end
 
diff --git a/app/models/concerns/account_header.rb b/app/models/concerns/account_header.rb
index f1b0883ee..4d96e990a 100644
--- a/app/models/concerns/account_header.rb
+++ b/app/models/concerns/account_header.rb
@@ -2,6 +2,7 @@
 
 module AccountHeader
   extend ActiveSupport::Concern
+
   IMAGE_MIME_TYPES = ['image/jpeg', 'image/png', 'image/gif'].freeze
 
   class_methods do
@@ -10,6 +11,7 @@ module AccountHeader
       styles[:static] = { format: 'png' } if file.content_type == 'image/gif'
       styles
     end
+
     private :header_styles
   end
 
diff --git a/app/models/concerns/account_interactions.rb b/app/models/concerns/account_interactions.rb
new file mode 100644
index 000000000..d51e6643e
--- /dev/null
+++ b/app/models/concerns/account_interactions.rb
@@ -0,0 +1,127 @@
+# frozen_string_literal: true
+
+module AccountInteractions
+  extend ActiveSupport::Concern
+
+  class_methods do
+    def following_map(target_account_ids, account_id)
+      follow_mapping(Follow.where(target_account_id: target_account_ids, account_id: account_id), :target_account_id)
+    end
+
+    def followed_by_map(target_account_ids, account_id)
+      follow_mapping(Follow.where(account_id: target_account_ids, target_account_id: account_id), :account_id)
+    end
+
+    def blocking_map(target_account_ids, account_id)
+      follow_mapping(Block.where(target_account_id: target_account_ids, account_id: account_id), :target_account_id)
+    end
+
+    def muting_map(target_account_ids, account_id)
+      follow_mapping(Mute.where(target_account_id: target_account_ids, account_id: account_id), :target_account_id)
+    end
+
+    def requested_map(target_account_ids, account_id)
+      follow_mapping(FollowRequest.where(target_account_id: target_account_ids, account_id: account_id), :target_account_id)
+    end
+  end
+
+  included do
+    # Follow relations
+    has_many :follow_requests, dependent: :destroy
+
+    has_many :active_relationships,  class_name: 'Follow', foreign_key: 'account_id',        dependent: :destroy
+    has_many :passive_relationships, class_name: 'Follow', foreign_key: 'target_account_id', dependent: :destroy
+
+    has_many :following, -> { order('follows.id desc') }, through: :active_relationships,  source: :target_account
+    has_many :followers, -> { order('follows.id desc') }, through: :passive_relationships, source: :account
+
+    # Block relationships
+    has_many :block_relationships, class_name: 'Block', foreign_key: 'account_id', dependent: :destroy
+    has_many :blocking, -> { order('blocks.id desc') }, through: :block_relationships, source: :target_account
+    has_many :blocked_by_relationships, class_name: 'Block', foreign_key: :target_account_id, dependent: :destroy
+    has_many :blocked_by, -> { order('blocks.id desc') }, through: :blocked_by_relationships, source: :account
+
+    # Mute relationships
+    has_many :mute_relationships, class_name: 'Mute', foreign_key: 'account_id', dependent: :destroy
+    has_many :muting, -> { order('mutes.id desc') }, through: :mute_relationships, source: :target_account
+    has_many :conversation_mutes, dependent: :destroy
+    has_many :domain_blocks, class_name: 'AccountDomainBlock', dependent: :destroy
+
+    def follow!(other_account)
+      active_relationships.find_or_create_by!(target_account: other_account)
+    end
+
+    def block!(other_account)
+      block_relationships.find_or_create_by!(target_account: other_account)
+    end
+
+    def mute!(other_account)
+      mute_relationships.find_or_create_by!(target_account: other_account)
+    end
+
+    def mute_conversation!(conversation)
+      conversation_mutes.find_or_create_by!(conversation: conversation)
+    end
+
+    def block_domain!(other_domain)
+      domain_blocks.find_or_create_by!(domain: other_domain)
+    end
+
+    def unfollow!(other_account)
+      follow = active_relationships.find_by(target_account: other_account)
+      follow&.destroy
+    end
+
+    def unblock!(other_account)
+      block = block_relationships.find_by(target_account: other_account)
+      block&.destroy
+    end
+
+    def unmute!(other_account)
+      mute = mute_relationships.find_by(target_account: other_account)
+      mute&.destroy
+    end
+
+    def unmute_conversation!(conversation)
+      mute = conversation_mutes.find_by(conversation: conversation)
+      mute&.destroy!
+    end
+
+    def unblock_domain!(other_domain)
+      block = domain_blocks.find_by(domain: other_domain)
+      block&.destroy
+    end
+
+    def following?(other_account)
+      active_relationships.where(target_account: other_account).exists?
+    end
+
+    def blocking?(other_account)
+      block_relationships.where(target_account: other_account).exists?
+    end
+
+    def domain_blocking?(other_domain)
+      domain_blocks.where(domain: other_domain).exists?
+    end
+
+    def muting?(other_account)
+      mute_relationships.where(target_account: other_account).exists?
+    end
+
+    def muting_conversation?(conversation)
+      conversation_mutes.where(conversation: conversation).exists?
+    end
+
+    def requested?(other_account)
+      follow_requests.where(target_account: other_account).exists?
+    end
+
+    def favourited?(status)
+      status.proper.favourites.where(account: self).exists?
+    end
+
+    def reblogged?(status)
+      status.proper.reblogs.where(account: self).exists?
+    end
+  end
+end