Apply quote by parsing post body

app/lib/activitypub/activity/create.rb

@@ -73,6 +73,7 @@ class ActivityPub::Activity::Create < ActivityPub::Activity
     @mentions = []
     @params   = {}
 
+    process_quote
     process_status_params
     process_tags
     process_audience
@@ -512,6 +513,13 @@ class ActivityPub::Activity::Create < ActivityPub::Activity
     @quote ||= quote_from_url(@object['quoteUrl'] || @object['_misskey_quote'])
   end
 
+  def process_quote
+    if quote.nil? && md = @object['content']&.match(/QT:\s*\[<a href=\"([^\"]+).*?\]/)
+      @quote = quote_from_url(md[1])
+      @object['content'] = @object['content'].sub(/QT:\s*\[.*?\]/, '<span class="quote-inline"><br/>\1</span>')
+    end
+  end
+
   def quote_from_url(url)
     return nil if url.nil?
 

app/services/post_status_service.rb

@@ -31,8 +31,8 @@ class PostStatusService < BaseService
     return idempotency_duplicate if idempotency_given? && idempotency_duplicate?
 
     validate_media!
-    preprocess_quote!
     preprocess_attributes!
+    preprocess_quote!
 
     if scheduled?
       schedule_status!
@@ -49,6 +49,19 @@ class PostStatusService < BaseService
 
   private
 
+  def status_from_uri(uri)
+    ActivityPub::TagManager.instance.uri_to_resource(uri, Status)
+  end
+
+  def quote_from_url(url)
+    return nil if url.nil?
+
+    quote = ResolveURLService.new.call(url)
+    status_from_uri(quote.uri) if quote
+  rescue
+    nil
+  end
+
   def preprocess_attributes!
     @sensitive    = (@options[:sensitive].nil? ? @account.user&.setting_default_sensitive : @options[:sensitive]) || @options[:spoiler_text].present?
     @text         = @options.delete(:spoiler_text) if @text.blank? && @options[:spoiler_text].present?
@@ -56,6 +69,10 @@ class PostStatusService < BaseService
     @visibility   = :unlisted if @visibility&.to_sym == :public && @account.silenced?
     @scheduled_at = @options[:scheduled_at]&.to_datetime
     @scheduled_at = nil if scheduled_in_the_past?
+    if @quote_id.nil? && md = @text.match(/QT:\s*\[\s*(https:\/\/.+?)\s*\]/)
+      @quote_id = quote_from_url(md[1])&.id
+      @text.sub!(/QT:\s*\[.*?\]/, '')
+    end
   rescue ArgumentError
     raise ActiveRecord::RecordInvalid
   end