Add option to be notified when a followed user posts (#13546)

* Add bell button

Fix #4890

* Remove duplicate type from post-deployment migration

* Fix legacy class type mappings

* Improve query performance with better index

* Fix validation

* Remove redundant index from notifications

1 files changed, 16 insertions, 10 deletions

diff --git a/app/models/concerns/account_interactions.rb b/app/models/concerns/account_interactions.rb
index be7211f2c..427ebdae2 100644
--- a/app/models/concerns/account_interactions.rb
+++ b/app/models/concerns/account_interactions.rb
@@ -8,6 +8,7 @@ module AccountInteractions
       Follow.where(target_account_id: target_account_ids, account_id: account_id).each_with_object({}) do |follow, mapping|
         mapping[follow.target_account_id] = {
           reblogs: follow.show_reblogs?,
+          notify: follow.notify?,
         }
       end
     end
@@ -36,6 +37,7 @@ module AccountInteractions
       FollowRequest.where(target_account_id: target_account_ids, account_id: account_id).each_with_object({}) do |follow_request, mapping|
         mapping[follow_request.target_account_id] = {
           reblogs: follow_request.show_reblogs?,
+          notify: follow_request.notify?,
         }
       end
     end
@@ -95,25 +97,29 @@ module AccountInteractions
     has_many :announcement_mutes, dependent: :destroy
   end
 
-  def follow!(other_account, reblogs: nil, uri: nil, rate_limit: false)
-    reblogs = true if reblogs.nil?
-
-    rel = active_relationships.create_with(show_reblogs: reblogs, uri: uri, rate_limit: rate_limit)
+  def follow!(other_account, reblogs: nil, notify: nil, uri: nil, rate_limit: false)
+    rel = active_relationships.create_with(show_reblogs: reblogs.nil? ? true : reblogs, notify: notify.nil? ? false : notify, uri: uri, rate_limit: rate_limit)
                               .find_or_create_by!(target_account: other_account)
 
-    rel.update!(show_reblogs: reblogs)
+    rel.show_reblogs = reblogs unless reblogs.nil?
+    rel.notify       = notify  unless notify.nil?
+
+    rel.save! if rel.changed?
+
     remove_potential_friendship(other_account)
 
     rel
   end
 
-  def request_follow!(other_account, reblogs: nil, uri: nil, rate_limit: false)
-    reblogs = true if reblogs.nil?
-
-    rel = follow_requests.create_with(show_reblogs: reblogs, uri: uri, rate_limit: rate_limit)
+  def request_follow!(other_account, reblogs: nil, notify: nil, uri: nil, rate_limit: false)
+    rel = follow_requests.create_with(show_reblogs: reblogs.nil? ? true : reblogs, notify: notify.nil? ? false : notify, uri: uri, rate_limit: rate_limit)
                          .find_or_create_by!(target_account: other_account)
 
-    rel.update!(show_reblogs: reblogs)
+    rel.show_reblogs = reblogs unless reblogs.nil?
+    rel.notify       = notify  unless notify.nil?
+
+    rel.save! if rel.changed?
+
     remove_potential_friendship(other_account)
 
     rel