Remove auto-silence behaviour from spam check (#12117)

Fix #12113

app/lib/spam_check.rb

@@ -44,7 +44,6 @@ class SpamCheck
   end
 
   def flag!
-    auto_silence_account!
     auto_report_status!
   end
 
@@ -134,17 +133,13 @@ class SpamCheck
     text.gsub(/\s+/, ' ').strip
   end
 
-  def auto_silence_account!
-    @account.silence!
-  end
-
   def auto_report_status!
     status_ids = Status.where(visibility: %i(public unlisted)).where(id: matching_status_ids).pluck(:id) + [@status.id] if @status.distributable?
     ReportService.new.call(Account.representative, @account, status_ids: status_ids, comment: I18n.t('spam_check.spam_detected_and_silenced'))
   end
 
   def already_flagged?
-    @account.silenced?
+    @account.silenced? || @account.targeted_reports.unresolved.where(account_id: -99).exists?
   end
 
   def trusted?

app/models/account.rb

@@ -198,7 +198,7 @@ class Account < ApplicationRecord
   end
 
   def unsilence!
-    update!(silenced_at: nil, trust_level: trust_level == TRUST_LEVELS[:untrusted] ? TRUST_LEVELS[:trusted] : trust_level)
+    update!(silenced_at: nil)
   end
 
   def suspended?

app/models/admin/account_action.rb

@@ -62,6 +62,8 @@ class Admin::AccountAction
 
   def process_action!
     case type
+    when 'none'
+      handle_resolve!
     when 'disable'
       handle_disable!
     when 'silence'
@@ -103,6 +105,16 @@ class Admin::AccountAction
     end
   end
 
+  def handle_resolve!
+    if with_report? && report.account_id == -99 && target_account.trust_level == Account::TRUST_LEVELS[:untrusted]
+      # This is an automated report and it is being dismissed, so it's
+      # a false positive, in which case update the account's trust level
+      # to prevent further spam checks
+
+      target_account.update(trust_level: Account::TRUST_LEVELS[:trusted])
+    end
+  end
+
   def handle_disable!
     authorize(target_account.user, :disable?)
     log_action(:disable, target_account.user)