Class: Fractor::Workflow::Visualizer

Inherits:
Object
  • Object
show all
Defined in:
lib/fractor/workflow/visualizer.rb

Overview

Generates visual representations of workflows. Supports Mermaid, DOT/Graphviz, and ASCII art formats.

Instance Method Summary collapse

Constructor Details

#initialize(workflow_class) ⇒ Visualizer

Returns a new instance of Visualizer.



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# File 'lib/fractor/workflow/visualizer.rb', line 8

def initialize(workflow_class)
  @workflow_class = workflow_class
  @jobs = workflow_class.jobs
end

Instance Method Details

Print ASCII diagram to stdout



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# File 'lib/fractor/workflow/visualizer.rb', line 167

def print
  puts to_ascii
end

#to_ascii ⇒ String

Generate ASCII art diagram

Returns:

  • (String) —

    ASCII art representation



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# File 'lib/fractor/workflow/visualizer.rb', line 123

def to_ascii
  lines = []
  lines << "┌─────────────────────────────────────────┐"
  lines << "│ Workflow: #{@workflow_class.workflow_name.ljust(27)} │"
  lines << "└─────────────────────────────────────────┘"
  lines << ""

  # Compute execution order
  order = compute_execution_order

  order.each_with_index do |job_group, index|
    if job_group.size == 1
      # Single job
      job = @jobs[job_group.first]
      lines << "    ┌─────────────────────────┐"
      lines << "    │ #{job_group.first.ljust(23)} │"
      lines << "    │ (#{job.worker_class.name.split('::').last.ljust(21)}) │"
      lines << "    └─────────────────────────┘"
    else
      # Parallel jobs
      lines << "    ╔═════════════════════════╗"
      lines << "    ║ PARALLEL EXECUTION      ║"
      lines << "    ╚═════════════════════════╝"
      job_group.each do |job_name|
        job = @jobs[job_name]
        lines << "        ├─ #{job_name}"
        lines << "        │  (#{job.worker_class.name.split('::').last})"
      end
    end

    # Arrow to next group
    if index < order.size - 1
      lines << "           │"
      lines << "           ▼"
    end
  end

  lines << ""
  lines << "Legend: Regular jobs │ Parallel jobs ╔═══╗"

  lines.join("\n")
end

#to_dot ⇒ String

Generate DOT/Graphviz diagram

Returns:

  • (String) —

    DOT syntax



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# File 'lib/fractor/workflow/visualizer.rb', line 70

def to_dot
  lines = ["digraph #{dot_id(@workflow_class.workflow_name)} {"]
  lines << "  rankdir=TD;"
  lines << "  node [shape=box, style=rounded];"
  lines << ""

  # Start node
  lines << '  start [label="Start", shape=ellipse];'

  # Job nodes
  @jobs.each do |name, job|
    worker = job.worker_class.name
    label = "#{name}\\n(#{worker})"

    lines << if job.terminates
               "  #{dot_id(name)} [label=\"#{label}\", " \
                        "style=\"rounded,filled\", fillcolor=lightpink];"
             else
               "  #{dot_id(name)} [label=\"#{label}\"];"
             end
  end

  # End node
  lines << '  end [label="End", shape=ellipse];'
  lines << ""

  # Edges
  @jobs.each do |name, job|
    if job.dependencies.empty?
      lines << "  start -> #{dot_id(name)};"
    else
      job.dependencies.each do |dep|
        lines << if job.condition_proc
                   "  #{dot_id(dep)} -> #{dot_id(name)} " \
                            "[label=\"conditional\", style=dashed];"
                 else
                   "  #{dot_id(dep)} -> #{dot_id(name)};"
                 end
      end
    end

    if job.terminates
      lines << "  #{dot_id(name)} -> end;"
    end
  end

  lines << "}"
  lines.join("\n")
end

#to_mermaid ⇒ String

Generate Mermaid flowchart diagram

Returns:

  • (String) —

    Mermaid diagram syntax



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# File 'lib/fractor/workflow/visualizer.rb', line 16

def to_mermaid
  lines = ["flowchart TD"]
  lines << "    Start([Start: #{@workflow_class.workflow_name}])"

  # Add job nodes
  @jobs.each do |name, job|
    label = escape_mermaid(name)
    worker = escape_mermaid(job.worker_class.name.split("::").last)

    # Different shapes based on job type
    lines << if job.terminates
               "    #{node_id(name)}[/#{label}<br/>#{worker}/]"
             else
               "    #{node_id(name)}[#{label}<br/>#{worker}]"
             end
  end

  lines << "    End([End])"

  # Add edges
  @jobs.each do |name, job|
    if job.dependencies.empty?
      # Start job
      lines << "    Start --> #{node_id(name)}"
    else
      # Dependencies
      job.dependencies.each do |dep|
        edge_label = ""
        if job.condition_proc
          edge_label = "|conditional|"
        end
        lines << "    #{node_id(dep)} -->#{edge_label} #{node_id(name)}"
      end
    end

    # Terminating jobs
    if job.terminates
      lines << "    #{node_id(name)} --> End"
    end
  end

  # Add styling
  lines << ""
  lines << "    classDef terminating fill:#f9f,stroke:#333,stroke-width:2px"
  @jobs.each do |name, job|
    lines << "    class #{node_id(name)} terminating" if job.terminates
  end

  lines.join("\n")
end