Normalize template and script slug changes.

specs/script.allium

@@ -224,6 +224,12 @@ rule CreateScript {
 rule UpdateScript {
     when: UpdateScriptRequested(script, changes)
     ensures: ScriptFieldsUpdated(script, changes)
+    if changes.slug != null:
+        ensures: script.slug = unique_slug(slugify(changes.slug), excluding: script)
+        if script.file_path != "":
+            ensures: script.file_path = format("scripts/{slug}.lua", slug: script.slug)
+            ensures: ScriptFileWritten(script)
+            ensures: PreviousScriptFileDeleted(script)
     ensures: script.updated_at = now
     ensures: script.version = script.version + 1
 }

specs/template.allium

@@ -129,6 +129,12 @@ rule CreateAndPublishTemplate {
 rule UpdateTemplate {
     when: UpdateTemplateRequested(template, changes)
     ensures: TemplateFieldsUpdated(template, changes)
+    if changes.slug != null:
+        ensures: template.slug = unique_slug(slugify(changes.slug), excluding: template)
+        if template.file_path != "":
+            ensures: template.file_path = format("templates/{slug}.liquid", slug: template.slug)
+            ensures: TemplateFileWritten(template)
+            ensures: PreviousTemplateFileDeleted(template)
     ensures: template.updated_at = now
     ensures: template.version = template.version + 1
 }