skeleton classes for query DSL filtering (#50)

* skeleton classes for query DSL filtering

Author: mrhardikjoshi

lib/graphiti/active_graph/extensions/query_dsl/performer.rb

@@ -0,0 +1,40 @@
+module Graphiti::ActiveGraph::Extensions::QueryDsl
+  module Performer
+    attr_accessor :with_vars, :skip_arrow_cypher_rels
+
+    def apply_query_dsl
+      query_param = resource.context&.params&.[](:query)
+      query_param.present? ? apply_query_param(query_param) : scope
+    end
+
+    def apply_query_param(query_param)
+      @scope = query_generator.new(query_param, **query_generator_config).tap do |qg|
+        qg.generate_functions_optional_match
+        qg.generate_with_clause_partition_query
+        qg.generate_match_query
+        qg.generate_with_clause_query
+      end.query
+    end
+
+    private
+
+    def query_generator
+      Graphiti::ActiveGraph::Extensions::QueryDsl::QueryGenerator
+    end
+
+    def query_generator_config
+      require 'pry'
+      binding.pry
+      {
+        query: scope,
+        with_vars_to_carry:,
+        skip_arrow_cypher_rels: skip_arrow_cypher_rels || [],
+        resource: resource.class
+      }
+    end
+
+    def with_vars_to_carry
+      (query ? with_vars_for_sort : []).push(*with_vars).push(*Graphiti.context[:with_vars]).compact
+    end
+  end
+end

lib/graphiti/active_graph/extensions/query_dsl/query_generator.rb

@@ -0,0 +1,20 @@
+module Graphiti::ActiveGraph::Extensions::QueryDsl
+  class QueryGenerator
+    def initialize(query_param, query:, **config)
+      @query_param = query_param
+      @query = query
+    end
+
+    def generate_functions_optional_match
+    end
+
+    def generate_with_clause_partition_query
+    end
+
+    def generate_match_query
+    end
+
+    def generate_with_clause_query
+    end
+  end
+end

lib/graphiti/active_graph/scoping/filter.rb

@@ -2,6 +2,15 @@ module Graphiti::ActiveGraph
   module Scoping
     module Filter
       include Filterable
+      include Internal::SortingAliases
+      include Extensions::QueryDsl::Performer
+
+      attr_reader :scope
+
+      def apply
+        super
+        apply_query_dsl
+      end
 
       def each_filter
         filter_param.each_pair do |param_name, param_value|