Feature conversations muting (#3017)

* 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

4 files changed, 33 insertions, 1 deletions

diff --git a/app/models/account.rb b/app/models/account.rb
index d43cae038..bf3d92a51 100644
--- a/app/models/account.rb
+++ b/app/models/account.rb
@@ -84,6 +84,7 @@ class Account < ApplicationRecord
   # 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
 
   # Media
   has_many :media_attachments, dependent: :destroy
@@ -130,6 +131,10 @@ class Account < ApplicationRecord
     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 unfollow!(other_account)
     follow = active_relationships.find_by(target_account: other_account)
     follow&.destroy
@@ -145,6 +150,11 @@ class Account < ApplicationRecord
     mute&.destroy
   end
 
+  def unmute_conversation!(conversation)
+    mute = conversation_mutes.find_by(conversation: conversation)
+    mute&.destroy!
+  end
+
   def following?(other_account)
     following.include?(other_account)
   end
@@ -157,6 +167,10 @@ class Account < ApplicationRecord
     muting.include?(other_account)
   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
diff --git a/app/models/conversation.rb b/app/models/conversation.rb
index fbec961c7..3715e1049 100644
--- a/app/models/conversation.rb
+++ b/app/models/conversation.rb
@@ -10,7 +10,7 @@
 #
 
 class Conversation < ApplicationRecord
-  validates :uri, uniqueness: true
+  validates :uri, uniqueness: true, if: :uri
 
   has_many :statuses
 
diff --git a/app/models/conversation_mute.rb b/app/models/conversation_mute.rb
new file mode 100644
index 000000000..79299b995
--- /dev/null
+++ b/app/models/conversation_mute.rb
@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+# == Schema Information
+#
+# Table name: conversation_mutes
+#
+#  id              :integer          not null, primary key
+#  account_id      :integer          not null
+#  conversation_id :integer          not null
+#
+
+class ConversationMute < ApplicationRecord
+  belongs_to :account, required: true
+  belongs_to :conversation, required: true
+end
diff --git a/app/models/status.rb b/app/models/status.rb
index 772cef238..7c39a273a 100644
--- a/app/models/status.rb
+++ b/app/models/status.rb
@@ -181,6 +181,10 @@ class Status < ApplicationRecord
       select('reblog_of_id').where(reblog_of_id: status_ids).where(account_id: account_id).map { |s| [s.reblog_of_id, true] }.to_h
     end
 
+    def mutes_map(conversation_ids, account_id)
+      ConversationMute.select('conversation_id').where(conversation_id: conversation_ids).where(account_id: account_id).map { |m| [m.conversation_id, true] }.to_h
+    end
+
     def reload_stale_associations!(cached_items)
       account_ids = []