feat: json-path-lib-implementation

Author: Zaimwa9

Gemfile.lock

@@ -4,6 +4,7 @@ PATH
     flagsmith (4.3.0)
       faraday (>= 2.0.1)
       faraday-retry
+      jsonpath (~> 1.1)
       semantic
 
 GEM
@@ -21,8 +22,11 @@ GEM
       faraday (~> 2.0)
     gem-release (2.2.2)
     json (2.7.1)
+    jsonpath (1.1.5)
+      multi_json
     language_server-protocol (3.17.0.3)
     method_source (1.0.0)
+    multi_json (1.17.0)
     net-http (0.4.1)
       uri
     parallel (1.24.0)

flagsmith.gemspec

@@ -34,6 +34,7 @@ Gem::Specification.new do |spec|
 
   spec.add_dependency 'faraday', '>= 2.0.1'
   spec.add_dependency 'faraday-retry'
+  spec.add_dependency 'jsonpath', '~> 1.1'
   spec.add_dependency 'semantic'
   spec.metadata['rubygems_mfa_required'] = 'true'
 end

lib/flagsmith/engine/segments/evaluator.rb

@@ -1,5 +1,7 @@
 # frozen_string_literal: true
 
+require 'json'
+require 'jsonpath'
 require_relative 'constants'
 require_relative 'models'
 require_relative '../utils/hash_func'
@@ -200,25 +202,15 @@ def get_trait_value(property, context)
           traits[property] || traits[property.to_sym]
         end
 
-        # Get value from context using JSONPath-like syntax
+        # Get value from context using JSONPath syntax
         #
         # @param json_path [String] JSONPath expression (e.g., '$.identity.identifier')
         # @param context [Hash] The evaluation context
         # @return [Object, nil] The value at the path or nil
         def get_context_value(json_path, context)
           return nil unless context && json_path&.start_with?('$.')
-
-          # Simple JSONPath implementation - handle basic cases
-          path_parts = json_path.sub('$.', '').split('.')
-          current = context
-
-          path_parts.each do |part|
-            return nil unless current.is_a?(Hash)
-
-            current = current[part.to_sym]
-          end
-
-          current
+          results = JsonPath.new(json_path, use_symbols: true).on(context)
+          results.first
         rescue StandardError
           nil
         end