Module:Graph

Documentation for this module may be created at Module:Graph/doc

local p = {}

function p.getNodes( category, property )
	local nodes = {};
	local result = mw.smw.getQueryResult( '[[Category:' .. category .. ']]|?' .. property )
    if result ~= nil then
		for k1,v1 in pairs( result.results ) do
			nodes[v1.fulltext] = {}
			nodes[v1.fulltext].displaytitle = string.gsub( v1.displaytitle, '"', '' )
			nodes[v1.fulltext].dependencies = {} 
			for k2,v2 in pairs ( v1.printouts[property] ) do
				nodes[v1.fulltext].dependencies[v2.fulltext] = true
			end
		end
	end
   return nodes
end

function p.getPageName( title )
	return string.sub( title, string.find( title, ':' ) + 1 )
end

function p.draw(frame)
	local nodes = p.getNodes( frame.args[1], frame.args[2] )
	local s = 'digraph dependency_graph {\n'
	s = s .. 'rankdir=LR;\n'
	s = s .. 'node [shape=plaintext,fontname="Arial"];\n'

	for k1,v1 in pairs( nodes ) do
		s = s .. p.getPageName( k1 ) .. ' [URL="[[' .. k1 .. '|' .. v1.displaytitle .. ']]"];\n'
	end
	for k1,v1 in pairs( nodes ) do
		for k2, v2 in pairs ( v1.dependencies ) do
			s = s .. p.getPageName( k1 ) .. '->' .. p.getPageName( k2 ) .. '\n'
		end
	end
	s = s .. '}\n'
	return frame:callParserFunction{ name = '#tag', args = { 'graphviz', format='png', s } }

end

return p