class GraphQL::Analysis::FieldUsage


# Used deprecated GraphQL fields: Cheese.fatContent
# Used GraphQL fields: Cheese.id, Cheese.fatContent, Query.cheese
Schema.execute(query_str)
}
puts “Used deprecated GraphQL fields: #{used_deprecated_fields.join(‘, ’)}”
puts “Used GraphQL fields: #{used_fields.join(‘, ’)}”
Schema.query_analyzers << GraphQL::Analysis::FieldUsage.new { |query, used_fields, used_deprecated_fields|
@example Logging field usage and deprecated field usage
A query reducer for tracking both field usage and deprecated field usage.

def call(memo, visit_type, irep_node) 

def call(memo, visit_type, irep_node)
  if irep_node.ast_node.is_a?(GraphQL::Language::Nodes::Field) && visit_type == :leave
    field = "#{irep_node.owner_type.name}.#{irep_node.definition.name}"
    memo[:used_fields] << field
    if irep_node.definition.deprecation_reason
      memo[:used_deprecated_fields] << field
    end
  end
  memo
end

def final_value(memo) 

def final_value(memo)
  @field_usage_handler.call(memo[:query], memo[:used_fields].to_a, memo[:used_deprecated_fields].to_a)
end

def initial_value(query) 

def initial_value(query)
  {
    query: query,
    used_fields: Set.new,
    used_deprecated_fields: Set.new
  }
end

def initialize(&block) 

def initialize(&block)
  @field_usage_handler = block
end