Class: Wf::Workflow

Inherits:
ApplicationRecord show all
Defined in:
app/models/wf/workflow.rb

Instance Method Summary collapse

Instance Method Details

#do_validate! ⇒ Object

TODO: can from start place to end place todo: remove color hex to const.



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# File 'app/models/wf/workflow.rb', line 40

def do_validate!
  msgs = []
  start_place = places.start.first
  end_place   = places.end.first
  msgs << "must have start place" if start_place.blank?
  msgs << "must have only one start place" if places.start.count > 1
  msgs << "must have end place" if end_place.blank?
  msgs << "must have only one end place" if places.end.count > 1
  msgs << "must not have discrete transition" if transitions.any? { |t| !t.arcs.in.exists? }
  if start_place && end_place
    rgl = to_rgl
    places.each do |p|
      msgs << "start place can not reach #{p.name}" unless rgl.path?(start_place.to_gid.to_s, p.to_gid.to_s)
      msgs << "#{p.name} can not reach end_place" unless rgl.path?(p.to_gid.to_s, end_place.to_gid.to_s)
    end

    transitions.each do |t|
      msgs << "start place can not reach #{t.name}" unless rgl.path?(start_place.to_gid.to_s, t.to_gid.to_s)
      msgs << "#{t.name} can not reach end_place" unless rgl.path?(t.to_gid.to_s, end_place.to_gid.to_s)
    end
  end

  if Wf.use_lola
    msgs << "has deadlock" if to_lola.deadlock?
    msgs << "has dead transition" unless to_lola.quasiliveness?
    msgs << "can not reach to the end place" unless to_lola.reachability_of_final_marking?
  end

  if msgs.present?
    update_columns(is_valid: false, error_msg: msgs.join("\n"))
  else
    update_columns(is_valid: true, error_msg: "")
  end
end

#render_graph(wf_case = nil) ⇒ Object 



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# File 'app/models/wf/workflow.rb', line 190

def render_graph(wf_case = nil)
  graph = to_graph(wf_case)
  path = Rails.root.join("tmp", "#{id}.svg")
  graph.output(svg: path)
  File.read(path)
end

#to_graph(wf_case = nil, base = nil) ⇒ Object 



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# File 'app/models/wf/workflow.rb', line 75

def to_graph(wf_case = nil, base = nil)
  fontfamily = "system, -apple-system, BlinkMacSystemFont, Segoe UI, Helvetica, Arial, sans-serif, Apple Color Emoji, Segoe UI Emoji, Noto Color Emoji, Segoe UI Symbol"
  fontfamily_monospace = "SFMono-Regular, Consolas, Liberation Mono, Menlo, Courier, monospace"
  graph = base || GraphViz.new(name, type: :digraph, rankdir: "LR", splines: true, ratio: :auto)

  free_token_places = if wf_case
    wf_case.tokens.free.map(&:place_id)
  else
    []
  end
  pg_mapping = {}
  places.order("place_type ASC").each do |p|
    if p.start?
      fillcolor = "#ffe7ba"
      textcolor = "#fa8c16"
      shape     = :doublecircle
    elsif p.end?
      fillcolor = "#dff2ef"
      textcolor = "#29c0b1"
      shape     = :doublecircle
    else
      fillcolor = "#fbdbe1"
      textcolor = "#ff3366"
      shape     = :circle
    end

    token_count = free_token_places.count(p.id)
    if token_count >= 1
      label  = "&bull;"
      xlabel = nil
      fontsize = 25
    else
      label = p.name
      xlabel = nil
    end

    pg = graph.add_nodes(p.graph_id,
                         label: label,
                         xlabel: xlabel,
                         shape: shape,
                         fixedsize: true,
                         style: :filled,
                         fontname: fontfamily,
                         fontcolor: textcolor,
                         fontsize: fontsize,
                         color: fillcolor,
                         fillcolor: fillcolor,
                         href: Wf::Engine.routes.url_helpers.edit_workflow_place_path(self, p))
    pg_mapping[p] = pg
  end

  tg_mapping = {}
  transitions.each do |t|
    peripheries = if t.multiple_instance?
      3
    else
      1
    end
    tg = graph.add_nodes(t.graph_id, label: t.name, shape: :box, style: :filled, fillcolor: "#d6ddfa", color: "#d6ddfa",
                                     fontcolor: "#2c50ed", fontname: fontfamily, peripheries: peripheries,
                                     href: Wf::Engine.routes.url_helpers.edit_workflow_transition_path(self, t))
    tg_mapping[t] = tg
    # NOTICE: if sub_workflow is transition's workflow, then graph will loop infinite, this is valid for workflow definition.
    next unless t.is_sub_workflow? && t.sub_workflow != t.workflow

    sub_graph = graph.add_graph("cluster#{t.sub_workflow_id}", rankdir: "LR", splines: true, ratio: :auto)
    sub_graph[:label] = t.sub_workflow.name
    sub_graph[:style] = :dashed
    sub_graph[:color] = :lightgrey
    # TODO: detect related case for sub workflow.
    t.sub_workflow.to_graph(nil, sub_graph)
    graph.add_edges(tg, t.sub_workflow.places.start.first.graph_id, style: :dashed, dir: :both)
  end

  arcs.order("direction desc").each do |arc|
    label = if arc.guards_count > 0
      arc.guards.map(&:inspect).join(" & ")
    else
      ""
    end
    if arc.in?
      graph.add_edges(
        pg_mapping[arc.place],
        tg_mapping[arc.transition],
        label: label,
        weight: 1,
        labelfloat: false,
        labelfontcolor: :red,
        arrowhead: :vee,
        fontsize: 10,
        color: "#53585c",
        fontcolor: "#53585c",
        fontname: fontfamily_monospace,
        href: Wf::Engine.routes.url_helpers.edit_workflow_arc_path(self, arc)
      )
    else
      graph.add_edges(
        tg_mapping[arc.transition],
        pg_mapping[arc.place],
        label: label,
        weight: 1,
        labelfloat: false,
        labelfontcolor: :red,
        arrowhead: :vee,
        fontsize: 10,
        color: "#53585c",
        fontcolor: "#53585c",
        fontname: fontfamily_monospace,
        href: Wf::Engine.routes.url_helpers.edit_workflow_arc_path(self, arc)
      )
    end
  end
  graph
end

#to_lola ⇒ Object 



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# File 'app/models/wf/workflow.rb', line 197

def to_lola
  @lola ||= Wf::Lola.new(self)
end

#to_rgl ⇒ Object 



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# File 'app/models/wf/workflow.rb', line 201

def to_rgl
  graph = RGL::DirectedAdjacencyGraph.new
  places.order("place_type ASC").each do |p|
    graph.add_vertex(p.to_gid.to_s)
  end

  transitions.each do |t|
    graph.add_vertex(t.to_gid.to_s)
  end

  arcs.order("direction desc").each do |arc|
    if arc.in?
      graph.add_edge(arc.place.to_gid.to_s, arc.transition.to_gid.to_s)
    else
      graph.add_edge(arc.transition.to_gid.to_s, arc.place.to_gid.to_s)
    end
  end
  graph
end