Class: GraphAgent::Graph::MermaidVisualizer

Inherits:
Object
  • Object
show all
Defined in:
lib/graph_agent/graph/mermaid_visualizer.rb

Constant Summary collapse

START_LABEL = 
"START"
END_LABEL = 
"END"
CONDITION_PREFIX = 
"cond_"

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(state_graph, options = {}) ⇒ MermaidVisualizer

Returns a new instance of MermaidVisualizer.



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# File 'lib/graph_agent/graph/mermaid_visualizer.rb', line 17

def initialize(state_graph, options = {})
  @graph = state_graph
  @options = options
end

Class Method Details

.render(state_graph, options = {}) ⇒ Object

Generate Mermaid diagram for a StateGraph



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# File 'lib/graph_agent/graph/mermaid_visualizer.rb', line 13

def self.render(state_graph, options = {})
  new(state_graph, options).render
end

Instance Method Details

#render ⇒ Object 



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# File 'lib/graph_agent/graph/mermaid_visualizer.rb', line 22

def render
  lines = ["graph TD"]
  lines << _style_definitions
  lines << ""

  # Render entry point (START)
  lines << _node_definition(START.to_s, START_LABEL, :start)

  # Render all graph nodes
  @graph.nodes.each do |name, node|
    lines << _node_definition(name, _node_label(name, node), :node)
  end

  # Render exit point (END)
  lines << _node_definition(END_NODE.to_s, END_LABEL, :end)

  lines << ""

  # Render regular edges
  @graph.edges.each do |edge|
    lines << _edge_definition(edge)
  end

  # Render conditional edges (branches)
  @graph.branches.each do |source, branches|
    branches.each_with_index do |(name, branch), idx|
      cond_id = "#{source}_#{CONDITION_PREFIX}#{idx}"
      lines << _node_definition(cond_id, _condition_label(branch), :condition)

      # Edge from source to condition node
      lines << "  #{_safe_id(source)} --> #{_safe_id(cond_id)}"

      # Edges from condition to targets
      if branch.path_map
        _render_path_map_edges(branch, cond_id, lines)
      else
        # Simple condition - render with note
        lines << "  #{_safe_id(cond_id)} -.->|condition| #{_safe_id(source)}_next"
        lines << "  #{_safe_id(source)}_next[\"?\"]"
      end
    end
  end

  # Render waiting edges (multi-source edges)
  @graph.waiting_edges.each do |(sources, target)|
    sources.each do |source|
      lines << "  #{_safe_id(source)} --> #{_safe_id(target)}"
    end
  end

  lines.join("\n")
end