Class: LazyGraph::Context

Inherits:
Object
  • Object
show all
Defined in:
lib/lazy_graph/context.rb

Overview

Context class is responsible for managing ruleset and input data, allowing querying and dynamic method calls to access input fields.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(graph, input) ⇒ Context

Returns a new instance of Context.



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# File 'lib/lazy_graph/context.rb', line 9

def initialize(graph, input)
  input = HashUtils.deep_dup(input, symbolize: true)
  graph.validate!(input) if [true, 'input'].include?(graph.validate)
  @graph = graph
  @input = input
end

Instance Attribute Details

#input ⇒ Object

Returns the value of attribute input.



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# File 'lib/lazy_graph/context.rb', line 7

def input
  @input
end

#ruleset ⇒ Object

Returns the value of attribute ruleset.



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# File 'lib/lazy_graph/context.rb', line 7

def ruleset
  @ruleset
end

Instance Method Details

#pretty_print(q) ⇒ Object 



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# File 'lib/lazy_graph/context.rb', line 50

def pretty_print(q)
  # Start the custom pretty print
  q.group(1, '<LazyGraph::Context ', '>') do
    q.group do
      q.text 'graph='
      q.pp(@graph)
    end
  end
end

#query(paths) ⇒ Object Also known as: [] 



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# File 'lib/lazy_graph/context.rb', line 16

def query(paths)
  paths.is_a?(Array) ? paths.map { |path| resolve(path) } : resolve(paths)
end

#resolve(path) ⇒ Object 



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# File 'lib/lazy_graph/context.rb', line 20

def resolve(path)
  @input = @graph.root_node.fetch_item({ input: @input }, :input, nil)

  query = PathParser.parse(path, true)
  stack = StackPointer.new(nil, @input, 0, :'$', nil)
  stack.root = stack

  result = @graph.root_node.resolve(query, stack)

  @graph.root_node.clear_visits!
  if @graph.debug?
    debug_trace = stack.frame[:DEBUG]
    stack.frame[:DEBUG] = nil
  end
  {
    output: HashUtils.strip_invalid(result),
    debug_trace: HashUtils.strip_invalid(debug_trace)
  }
rescue LazyGraph::AbortError => e
  {
    output: { err: e.message, status: :abort }
  }
rescue StandardError => e
  LazyGraph.logger.error(e.message)
  LazyGraph.logger.error(e.backtrace)
  {
    output: { err: e.message, backtrace: e.backtrace }
  }
end