add methods for building template from preset on serverside

devops-service/lib/stack_template_presets/base.rb

@@ -1,4 +1,5 @@
 require 'lib/string_helper'
+require 'db/mongo/models/stack_template/stack_template_factory'
 
 module Devops
   module StackTemplatePresets
@@ -12,13 +13,59 @@ module Devops
         {id: id, template_preset_body: template_preset_body}
       end
 
-      def template_preset_body
-        file_name = File.join("lib/stack_template_presets/#{id}.json")
-        File.read(file_name)
+      def build_template_from_preset(provider, stack_template_id, template_attrs)
+        stack_template_attrs = {
+          id: stack_template_id,
+          provider: provider,
+          template_body: serialize(actual_template_hash(template_preset_hash, template_attrs))
+        }
+        template_model = Model::StackTemplateFactory.create(provider, stack_template_attrs)
       end
 
-      def build_template_from_preset(provider, options={})
-        # do smth
+      def template_preset_body
+        @template_preset_body ||= begin
+          file_name = File.join("lib/stack_template_presets/#{id}.#{template_file_extension}")
+          File.read(file_name)
+        end
+      end
+
+
+      private
+
+      def template_preset_hash
+        unserialize(template_preset_body)
+      end
+
+      def actual_template_hash(template_preset_hash, params)
+
+      end
+
+      # some templates may be YAML files
+      def template_file_extension
+        serialization_strategy.to_s
+      end
+
+      # some templates may be YAML files
+      def serialize(hash)
+        case serialization_strategy
+        when :json
+          hash.to_json
+        else
+          raise
+        end
+      end
+
+      def unserialize(text)
+        case serialization_strategy
+        when :json
+          JSON.parse(text)
+        else
+          raise
+        end
+      end
+
+      def serialization_strategy
+        :json
       end
 
     end

devops-service/routes/v2.0/handlers/stack_template_preset.rb

@@ -20,6 +20,21 @@ module Devops
           }
         end
 
+        def build_stack_template
+          lamda {
+            # check_privileges("stack_template_presets", "r")
+            check_privileges('stack_template', 'w')
+
+            attrs = create_object_from_json_body
+            provider = attrs.delete('provider')
+            stack_template_id = attrs.delete('stack_template_id')
+            stack_template = build_template_from_preset(provider, stack_template_id, attrs)
+
+            settings.mongo.stack_template_insert(template_model)
+            create_response 'Created', template_model.to_hash, 201
+          }
+        end
+
       end
     end
   end

devops-service/routes/v2.0/stack_template_presets.rb

@@ -29,6 +29,27 @@ module Devops
           #
           app.get_with_headers "/stack_template_presets/:id", :headers => [:accept], &Devops::Version2_0::Handler::StackTemplatePreset.get_preset
 
+
+          # Build stack template from preset
+          #
+          # * *Request*
+          #   - method : POST
+          #   - headers :
+          #     - Accept: application/json
+          #   - params :
+          #     - provider: string
+          #     - stack_template_id: id of stack template to create
+          #     - template_attrs: hash with template attributes
+          #
+          # * *Returns* : created stack template model
+          #   {
+          #     id: 'template id',
+          #     provider: 'provider',
+          #     template_body: 'long body'
+          #   }
+          #
+          app.post_with_headers "/stack_template_presets/:id/build_stack_template", :headers => [:accept], &Devops::Version2_0::Handler::StackTemplatePreset.build_stack_template
+
           puts "Stack template presets routes initialized"
         end