enqueue user page job if no avatar uri is found

app/jobs/domain/fa/job/user_avatar_job.rb

@@ -21,7 +21,13 @@ class Domain::Fa::Job::UserAvatarJob < Domain::Fa::Job::Base
 
     unless @avatar.file_uri
       # try to find a corresponding log entry
-      log_entry = @avatar.guess_user_page_log_entry || raise("no user page log entry found")
+      log_entry = @avatar.guess_user_page_log_entry || begin
+        Domain::Fa::Job::UserPageJob.perform_later({
+          user: @user,
+          caused_by_entry: @caused_by_entry,
+        })
+        raise("no user page log entry found, enqueued user page scan")
+      end
       @caused_by_entry ||= log_entry
       parser = Domain::Fa::Parser::Page.new(log_entry.response.contents, require_logged_in: false)
       @avatar.state_detail["guessed_log_entry_id"] = log_entry.id

spec/jobs/domain/fa/job/user_avatar_job_spec.rb

@@ -62,6 +62,21 @@ describe Domain::Fa::Job::UserAvatarJob do
         expect(avatar).to eq(avatar2)
       end
     end
+
+    context "the user has not been page scanned yet" do
+      it "enqueues a user page scan job" do
+        ret = described_class.perform_now({ user: user })
+        expect(ret).to be_a(Exception)
+        expect(ret.message).to match(/no user page log entry/)
+        expect(user.avatar.file_uri).to eq(nil)
+        expect(SpecUtil.enqueued_jobs(Domain::Fa::Job::UserPageJob)).to match([
+          including(args: [{
+                      user: user,
+                      caused_by_entry: "nil",
+                    }]),
+        ])
+      end
+    end
   end
 
   context "the avatar model exists with a file uri" do