Module: Card::Machine

Included in:
Set::Right::Script, Set::Right::Style, Set::Type::CoffeeScript, Set::Type::Css, Set::Type::JavaScript, Set::Type::Skin
Defined in:
mod/03_machines/lib/card/machine.rb

Defined Under Namespace

Modules: ClassMethods

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.included(host_class) ⇒ Object 



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# File 'mod/03_machines/lib/card/machine.rb', line 60

def self.included(host_class)
  host_class.extend( ClassMethods )
  host_class.output_config = { filetype: 'txt' }


  if Codename[:machine_output]  # for compatibility with old migrations
    host_class.card_accessor :machine_output, type: :file
    host_class.card_accessor :machine_input, type: :pointer

    # define default machine behaviour
    host_class.collect_input_cards do
      # traverse through all levels of pointers and
      # collect all item cards as input
      items = [self]
      new_input = []
      already_extended = {} # avoid loops
      loop_limit = 5
      while items.size > 0
        item = items.shift
        next if item.trash
        next if already_extended[item.id].to_i > loop_limit
        if item.item_cards == [item]  # no pointer card
          new_input << item
        else
          items.insert(0, item.item_cards)
          items.flatten!
          new_input << item if item != self
          already_extended[item] = already_extended[item].to_i + 1
        end
      end
      new_input
    end

    host_class.prepare_machine_input {}
    host_class.machine_engine { |input| input }
    host_class.store_machine_output do |output|
      filetype = host_class.output_config[:filetype]
      file = Tempfile.new [ id.to_s, ".#{filetype}" ]
      file.write output
      file.rewind
      Card::Auth.as_bot do
        p = machine_output_card
        p.file = file
        p.save!
      end
      file.close
      file.unlink
    end


    host_class.format do
      view :machine_output_url do |args|
        machine_output_url
      end
    end

    event_suffix = host_class.name.gsub ':', '_'
    host_class.event(
      "reset_machine_output_#{ event_suffix }".to_sym,
      after: :expire_related, on: :save
    ) do
      reset_machine_output!
    end
  end
end

Instance Method Details

#ensure_machine_output ⇒ Object 



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# File 'mod/03_machines/lib/card/machine.rb', line 196

def ensure_machine_output
  output = fetch trait: :machine_output
  if !output || !output.selected_content_action_id
    update_machine_output
  end
end

#input_item_cards ⇒ Object 



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# File 'mod/03_machines/lib/card/machine.rb', line 181

def input_item_cards
  machine_input_card.item_cards
end

#lock! ⇒ Object 



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# File 'mod/03_machines/lib/card/machine.rb', line 169

def lock!
  Card.cache.write lock_cache_key, true
end

#lock_cache_key ⇒ Object 



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# File 'mod/03_machines/lib/card/machine.rb', line 161

def lock_cache_key
  "UPDATE-LOCK:#{key}"
end

#locked? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'mod/03_machines/lib/card/machine.rb', line 165

def locked?
  Card.cache.read lock_cache_key
end

#machine_output_path ⇒ Object 



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# File 'mod/03_machines/lib/card/machine.rb', line 191

def machine_output_path
  ensure_machine_output
  machine_output_card.file.path
end

#machine_output_url ⇒ Object 



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# File 'mod/03_machines/lib/card/machine.rb', line 185

def machine_output_url
  ensure_machine_output
  machine_output_card.file.url #(:default, timestamp: false)
  # to get rid of additional number in url
end

#reset_machine_output! ⇒ Object 



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# File 'mod/03_machines/lib/card/machine.rb', line 140

def reset_machine_output!
  Auth.as_bot do
    moc = machine_output_card and moc.real? and moc.delete!
    #mic = machine_input_card  and mic.real? and mic.delete!
    update_input_card
  end
end

#run_machine(joint = "\n") ⇒ Object 



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# File 'mod/03_machines/lib/card/machine.rb', line 126

def run_machine joint="\n"
  before_engine
  output = input_item_cards.map do |input|
    unless input.kind_of? Card::Set::Type::Pointer
      if input.respond_to? :machine_input
        engine( input.machine_input )
      else
        engine( input.format._render_raw )
      end
    end
  end.select(&:present?).join( joint )
  after_engine output
end

#unlock! ⇒ Object 



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# File 'mod/03_machines/lib/card/machine.rb', line 173

def unlock!
  Card.cache.write lock_cache_key, false
end

#update_input_card ⇒ Object 



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# File 'mod/03_machines/lib/card/machine.rb', line 177

def update_input_card
  machine_input_card.items = engine_input
end

#update_machine_output ⇒ Object 



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# File 'mod/03_machines/lib/card/machine.rb', line 149

def update_machine_output
  if ok? :read and not was_already_locked = locked?
    Auth.as_bot do
      lock!
      update_input_card
      run_machine
    end
  end
ensure
   unlock! unless was_already_locked
end