Add template import_resource COS source validation

Refactor the parameter validation and implicit auth checks via
'resource_search' calls to allow for both Cloud Manager templates
(existing functionality) and Storage Manager object storage objects
(newly added functionality).

After validation the 'data' still gets passed directly to the
import_image_queue class method of the destination provider.

app/controllers/api/cloud_templates_controller.rb

@@ -5,27 +5,40 @@ def check_compliance_resource(type, id, _data = nil)
     end
 
     def import_resource(_type, _id, data = {})
-      params = %w[dst_provider_id src_provider_id src_image_id]
-      raise BadRequestError, "Parameter 'data' has to contain non-empty values for the keys '#{params.join(", ")}', received: '#{data.to_json}'" if data.values_at(*params).any?(&:blank?)
+      required_params = %w[dst_provider_id src_provider_id src_image_id]
+      raise BadRequestError, "Parameter 'data' has to contain non-empty values for the keys '#{required_params.join(", ")}', received: '#{data.to_json}'" if data.values_at(*required_params).any?(&:blank?)
+
       raise BadRequestError, "Source and destination provider identifiers must differ" if data['dst_provider_id'] == data['src_provider_id']
 
       ems_dst   = resource_search(data['dst_provider_id'], :providers)
       ems_src   = resource_search(data['src_provider_id'], :providers)
-      src_image = resource_search(data['src_image_id'], :templates)
-
-      opt_params = %w[obj_storage_id bucket_id disk_type_id]
-      if data.values_at(*opt_params).any?
-        raise BadRequestError, "Either provide all of the Object-Storage related parameters (well-formed) or none" if data.values_at(*opt_params).any?(&:blank?)
 
-        cos = resource_search(data['obj_storage_id'], :providers)
-        bucket = resource_search(data['bucket_id'], :cloud_object_store_containers)
-        resource_search(data['disk_type_id'], :cloud_volume_types)
-
-        raise BadRequestError, "Object bucket specified by the id '#{data['bucket_id']}' does not belong to the object storage provider with id '#{data['obj_storage_id']}'" if bucket.ems_id != cos.id
+      if ems_src.kind_of?(ManageIQ::Providers::CloudManager)
+        src_image = resource_search(data['src_image_id'], :templates)
+        optional_params = %w[obj_storage_id cos_container_id cloud_volume_type_id]
+        if data.values_at(*optional_params).any?
+          raise BadRequestError, "Either provide all of the Object-Storage related parameters (well-formed) or none" if data.values_at(*optional_params).any?(&:blank?)
+
+          cos = resource_search(data['obj_storage_id'], :providers)
+          cos_container = resource_search(data['cos_container_id'], :cloud_object_store_containers)
+          resource_search(data['cloud_volume_type_id'], :cloud_volume_types)
+
+          raise BadRequestError, "Cloud object store container specified by the id '#{data['cos_container_id']}' does not belong to the object store provider with id '#{data['obj_storage_id']}'" if cos_container.ems_id != cos.id
+          raise BadRequestError, "Source image (template) specified by the id '#{data['src_image_id']}' does not belong to the source provider with id '#{ems_src.id}'" if src_image.ems_id != ems_src.id
+        end
+      elsif ems_src.kind_of?(ManageIQ::Providers::StorageManager) && ems_src.supports?(:object_storage)
+        required_params = %w[cos_container_id cloud_volume_type_id]
+        raise BadRequestError, "Parameter 'data' has to contain non-empty values for the keys '#{required_params.join(", ")}', received: '#{data.to_json}'" if data.values_at(*required_params).any?(&:blank?)
+
+        src_image = resource_search(data['src_image_id'], :cloud_object_store_objects)
+        cos_container = resource_search(data['cos_container_id'], :cloud_object_store_containers)
+        resource_search(data['cloud_volume_type_id'], :cloud_volume_types)
+
+        raise BadRequestError, "Cloud object store container specified by the id '#{data['cos_container_id']}' does not belong to the object store provider with id '#{data['src_provider_id']}'" if cos_container.ems_id != ems_src.id
+      else
+        raise BadRequestError, "Source provider type '#{ems_src.class}' does not support image import"
       end
 
-      raise BadRequestError, "Source image specified by the id '#{data['src_image_id']}' does not belong to the source provider with id '#{ems_src.id}'" if src_image.ems_id != ems_src.id
-
       task_id = ManageIQ::Providers::CloudManager::Template.import_image_queue(session[:userid], ems_dst, data)
       msg = "Importing image '#{src_image.name}' from '#{ems_src.name}' into '#{ems_dst.name}'."
       api_log_info(msg)