Module: Trailblazer::Developer::Wtf

Defined in:
lib/trailblazer/developer/wtf.rb

Defined Under Namespace

Modules: String

Constant Summary collapse

COLOR_MAP = 
{ pass: :green, fail: :brown }
SIGNALS_MAP = 
{
  'Trailblazer::Activity::Right': :pass,
  'Trailblazer::Activity::FastTrack::PassFast': :pass,

  'Trailblazer::Activity::Left': :fail,
  'Trailblazer::Activity::FastTrack::FailFast': :fail,
}

Class Method Summary collapse

Class Method Details

.fmt(line, style) ⇒ Object 



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# File 'lib/trailblazer/developer/wtf.rb', line 66

def fmt(line, style)
  return line unless style
  String.send(style, line)
end

.invoke(activity, ctx, flow_options, *args) ⇒ Object

Run activity with tracing enabled and inject a mutable Stack instance. This allows to display the trace even when an exception happened



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# File 'lib/trailblazer/developer/wtf.rb', line 27

def invoke(activity, (ctx, flow_options), *args)
  flow_options ||= {} # Ruby sucks.

  # this instance gets mutated with every step. unfortunately, there is
  # no other way in Ruby to keep the trace even when an exception was thrown.
  stack = Trace::Stack.new

  _returned_stack, *returned = Trace.invoke(
    activity,
    [
      ctx,
      flow_options.merge(stack: stack)
    ],
    *args
  )

  returned
ensure
  puts Trace::Present.(
    stack,
    renderer: method(:renderer),
    color_map: COLOR_MAP.merge( flow_options[:color_map] || {} )
  )
end

.renderer(task_node:, position:, tree:) ⇒ Object 



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# File 'lib/trailblazer/developer/wtf.rb', line 52

def renderer(task_node:, position:, tree:)
  name, level, output, color_map = task_node.values_at(:name, :level, :output, :color_map)

  if output.nil? && tree[position.next].nil? # i.e. when exception raised
    return [ level, %{#{fmt(fmt(name, :red), :bold)}} ]
  end

  if output.nil? # i.e. on entry/exit point of activity
    return [ level, %{#{name}} ]
  end

  [ level, %{#{fmt( name, color_map[ signal_of(output.data) ] )}} ]
end

.signal_of(entity_output) ⇒ Object 



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# File 'lib/trailblazer/developer/wtf.rb', line 71

def signal_of(entity_output)
  entity_klass = entity_output.is_a?(Class) ? entity_output : entity_output.class
  SIGNALS_MAP[entity_klass.name.to_sym]
end