Class: FlowEngine::Graph::MermaidExporter

Inherits:
Object
  • Object
show all
Defined in:
lib/flowengine/graph/mermaid_exporter.rb

Overview

Exports a flow Definition to Mermaid flowchart syntax for visualization. Nodes are labeled with truncated question text; edges show condition labels when present.

Constant Summary collapse

MAX_LABEL_LENGTH =

Maximum characters for node labels in the diagram (longer text is truncated with "...").

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Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(definition) ⇒ MermaidExporter

Returns a new instance of MermaidExporter.

Parameters:



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# File 'lib/flowengine/graph/mermaid_exporter.rb', line 14

def initialize(definition)
  @definition = definition
end

Instance Attribute Details

#definition ⇒ Object (readonly)

Returns the value of attribute definition.



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# File 'lib/flowengine/graph/mermaid_exporter.rb', line 11

def definition
  @definition
end

Instance Method Details

#export ⇒ String

Generates Mermaid flowchart TD (top-down) source.

Returns:

  • (String) —

    Mermaid diagram source (e.g. for Mermaid.js or docs)



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# File 'lib/flowengine/graph/mermaid_exporter.rb', line 21

def export
  lines = ["flowchart TD"]

  definition.steps.each_value do |node|
    lines << "  #{node.id}[\"#{truncate(node.question)}\"]"

    node.transitions.each do |transition|
      label = transition.condition_label
      lines << if label == "always"
                 "  #{node.id} --> #{transition.target}"
               else
                 "  #{node.id} -->|\"#{label}\"| #{transition.target}"
               end
    end
  end

  lines.join("\n")
end