Force second step build to overcome can_access? check

The can_access? check will fail if the wizard does not allow multiple submissions. This means that on the second build of the wizard on the final step of a single submission wizard, the wizard instance will have no steps, and an error will be thrown when logic assumes it does.

controllers/custom_wizard/steps.rb

@@ -23,7 +23,7 @@ class CustomWizard::StepsController < ::ApplicationController
     if updater.success?
       wizard_id = update_params[:wizard_id]
       builder = CustomWizard::Builder.new(wizard_id, current_user)
-      @wizard = builder.build
+      @wizard = builder.build(force: true)
 
       current_step = @wizard.find_step(update[:step_id])
       current_submission = @wizard.current_submission

lib/custom_wizard/builder.rb

@@ -30,7 +30,7 @@ class CustomWizard::Builder
 
   def build(build_opts = {}, params = {})
     return nil if !SiteSetting.custom_wizard_enabled || !@wizard
-    return @wizard if !@wizard.can_access?
+    return @wizard if !@wizard.can_access? && !build_opts[:force]
 
     build_opts[:reset] = build_opts[:reset] || @wizard.restart_on_revisit
 

spec/components/custom_wizard/wizard_spec.rb

@@ -173,6 +173,8 @@ describe CustomWizard::Wizard do
     progress_step("step_2", acting_user: trusted_user)
     progress_step("step_3", acting_user: trusted_user)
 
+    @permitted_template["multiple_submissions"] = true
+
     expect(
       CustomWizard::Wizard.new(@permitted_template, trusted_user).can_access?
     ).to eq(true)

spec/fixtures/wizard.json

@@ -3,7 +3,6 @@
   "name": "Super Mega Fun Wizard",
   "background": "#333333",
   "save_submissions": true,
-  "multiple_submissions": true,
   "after_signup": false,
   "prompt_completion": false,
   "theme_id": 2,