Follow call on locked account creates follow request instead

Reflect "requested" relationship in API and UI
Reflect inability of private posts to be reblogged in the UI
Disable Webfinger for locked accounts

app/models/account.rb

@@ -34,6 +34,8 @@ class Account < ApplicationRecord
   has_many :notifications, inverse_of: :account, dependent: :destroy
 
   # 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
 
@@ -179,6 +181,10 @@ class Account < ApplicationRecord
     def blocking_map(target_account_ids, account_id)
       Block.where(target_account_id: target_account_ids).where(account_id: account_id).map { |b| [b.target_account_id, true] }.to_h
     end
+
+    def requested_map(target_account_ids, account_id)
+      FollowRequest.where(target_account_id: target_account_ids).where(account_id: account_id).map { |r| [r.target_account_id, true] }.to_h
+    end
   end
 
   before_create do

app/models/follow_request.rb

@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+
+class FollowRequest < ApplicationRecord
+  belongs_to :account
+  belongs_to :target_account, class_name: 'Account'
+
+  validates :account, :target_account, presence: true
+  validates :account_id, uniqueness: { scope: :target_account_id }
+
+  def authorize!
+    account.follow!(target_account)
+    FeedManager.instance.merge_into_timeline(target_account, account)
+    destroy!
+  end
+
+  def reject!
+    destroy!
+  end
+end

app/models/status.rb

@@ -170,7 +170,7 @@ class Status < ApplicationRecord
     text.strip!
     self.reblog = reblog.reblog if reblog? && reblog.reblog?
     self.in_reply_to_account_id = thread.account_id if reply?
-    self.visibility             = :public if visibility.nil?
+    self.visibility             = (account.locked? ? :private : :public) if visibility.nil?
   end
 
   private