class Visualization

parameter　name　String

The name to sanitize.

returns　String

A sanitized identifier safe for use in Mermaid diagrams.

def sanitize_id(name)
	# Convert name to a valid Mermaid node ID
	name.to_s.gsub(/[^a-zA-Z0-9_]/, "_")
end

parameter　chain　Chain

The dependency chain to visualize.

returns　String

A Mermaid flowchart diagram in text format.

def generate(chain)
	lines = ["flowchart LR"]
	
	# Track nodes and their styles
	nodes = {}
	providers = ::Set.new
	provisions_in_chain = ::Set.new
	
	# Collect all provisions in the chain
	chain.provisions.each do |provision|
		provisions_in_chain.add(provision.name.to_s)
	end
	
	# Build the graph
	chain.ordered.each do |resolution|
		provider = resolution.provider
		name = provider.name.to_s
		node_id = sanitize_id(name)
		
		# Track this node
		nodes[name] = node_id
		
		# A provision has dependencies...
		provider.dependencies.each do |dependency|
			dep_name = dependency.name.to_s
			dep_id = sanitize_id(dep_name)
			
			nodes[dep_name] ||= dep_id
			
			# Create edge from provider to dependency
			if dependency.private?
				lines << "    #{node_id}[#{name}] -.-> #{dep_id}[#{dep_name}]"
			else
				lines << "    #{node_id}[#{name}] --> #{dep_id}[#{dep_name}]"
			end
		end
		
		# A provision provides other provisions...
		provider.provisions.each do |provision_name, provision|
			next if name == provision_name.to_s
			
			provision_str = provision_name.to_s
			provision_id = sanitize_id(provision_str)
			
			nodes[provision_str] ||= provision_id
			
			# Mark this node as a provider
			providers.add(name)
			
			# Create edge from provision to provider (undirected)
			lines << "    #{provision_id}[#{provision_str}] --- #{node_id}[#{name}]"
		end
	end
	
	# Add styling
	lines << ""
	lines << "    %% Styles"
	
	# Style providers with light blue
	providers.each do |name|
		lines << "    style #{sanitize_id(name)} fill:#add8e6"
	end
	
	# Highlight provisions in the chain with a thicker border
	provisions_in_chain.each do |name|
		if node_id = nodes[name]
			lines << "    style #{node_id} stroke-width:3px"
		end
	end
	
	return lines.join("\n")
end