Class: Lyra::Visualization::EventGraph

Inherits:
Object
  • Object
show all
Defined in:
lib/lyra/visualization/event_graph.rb

Overview

Force-directed event graph visualization for D3.js

Instance Method Summary collapse

Constructor Details

#initialize(events) ⇒ EventGraph

Returns a new instance of EventGraph.



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# File 'lib/lyra/visualization/event_graph.rb', line 5

def initialize(events)
  @events = events.sort_by { |e| event_timestamp(e) }
end

Instance Method Details

#to_d3_json ⇒ Object

Generate graph data for D3.js force-directed layout



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# File 'lib/lyra/visualization/event_graph.rb', line 10

def to_d3_json
  {
    nodes: build_nodes,
    links: build_links,
    metadata: graph_metadata
  }.to_json
end

#to_data ⇒ Object

Generate data hash (for API responses)



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# File 'lib/lyra/visualization/event_graph.rb', line 19

def to_data
  {
    nodes: build_nodes,
    links: build_links,
    metadata: graph_metadata
  }
end

#to_mermaid ⇒ Object

Generate Mermaid flowchart



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# File 'lib/lyra/visualization/event_graph.rb', line 28

def to_mermaid
  lines = ["flowchart TD"]

  @events.each do |event|
    node_id = sanitize_id(event_id(event))
    operation = event_operation(event).to_s.upcase
    model_info = "#{event_model_class(event)}##{event_model_id(event)}"
    changed_fields = format_changed_fields(event)

    label = if changed_fields.present?
      "#{operation}\\n#{model_info}\\n#{changed_fields}"
    else
      "#{operation}\\n#{model_info}"
    end

    lines << "    #{node_id}[\"#{label}\"]"
  end

  lines << ""

  build_links.each do |link|
    source_id = sanitize_id(link[:source])
    target_id = sanitize_id(link[:target])
    link_style = link[:type] == 'correlation' ? '-->' : '-.->'
    lines << "    #{source_id} #{link_style} #{target_id}"
  end

  lines.join("\n")
end