Contents

# Checks whether one or more rule holds and is capable of executing results.
class Restfulie::Client::Mikyung::WhenCondition

  # Creates a conditional execution based on a description.
  # Its rule is an array where its first element represents a rule name and second a lambda that returns true or false
  # Its params are extra params that might be passed to the rule
  # Example
  # WhenCondition.new("when running", ["", lambda { |resource| resource.human.state=='running' }], "")
  def initialize(description, rule, params)
    @description = description
    @results = []
    @extra = []
    @rule = rule
    @params = params
  end

  # will execute the first attached result
  def execute(resource, goal, mikyung)
    @results.each do |result|
      Restfulie::Common::Logger.logger.info("will '#{result.description}'")
      return result.execute(resource, goal, mikyung)
    end
  end

  # checks whether this step should execute for a specific resource
  def should_run_for(resource, goal)
    if @rule[1].arity==2
      rule_accepts = @rule[1].call(resource, @params)
    else
      rule_accepts = @rule[1].call(resource)
    end
    return false unless rule_accepts
    !@extra.find do |condition|
      !condition.should_run_for(resource, goal)
    end
  end

  # adds an extra condition to this step
  def and(condition)
    @extra << condition
  end
  
  # adds an extra condition to this step
  def but(condition)
    @extra << condition
  end
  
  # adds an extra result to this step
  def results_on(result)
    @results << result
  end
  
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
restfulie-0.8.0	lib/restfulie/client/mikyung/when_condition.rb