Module:Graph

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

local p = {}

function p.wrap( s, length )
	s = mw.text.trim( s )
	local oldindex = 1
	local index = string.find( s, ' ' )
	while ( index ) do
		if ( index - oldindex >= length ) then
			local temp = string.sub( s, 1, index - 1 ) .. '<BR/>' .. string.sub( s, index + 1 )
			s = temp
			oldindex = index + 4
		end
		index = string.find( s, ' ', index + 1)
	end
	return s
end

function p.cleanseDisplayTitle( displaytitle )
	local s = displaytitle
	s = string.gsub( s, '"', '' )
	s = string.gsub( s, '%[', '' )
	s = string.gsub( s, '%]', '' )
	s = string.gsub( s, '&', 'and' )
	s = p.wrap ( s, 15 )
	return '<<TABLE BORDER="0"><TR><TD>' .. s .. '</TD></TR></TABLE>>'
end

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 = p.cleanseDisplayTitle( 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.drawGraph( category, property, forward )
	local nodes = p.getNodes( category, property )
	local s = 'digraph dependency_graph {\n'
	s = s .. 'rankdir=LR;\n'
	s = s .. 'node [shape=box, fontsize=10, fontname="Arial"];\n'

	for k1,v1 in pairs( nodes ) do
		s = s .. p.getPageName( k1 ) .. ' [URL="[[' .. k1 .. ']]", label=' .. v1.displaytitle .. '];\n'
	end
	for k1,v1 in pairs( nodes ) do
		for k2, v2 in pairs ( v1.dependencies ) do
			if ( forward ) then
				s = s .. p.getPageName( k1 ) .. '->' .. p.getPageName( k2 ) .. '\n'
			else
				s = s .. p.getPageName( k2 ) .. '->' .. p.getPageName( k1 ) .. '\n'
			end
		end
	end
	s = s .. '}\n'
	return s
end

function p.draw(frame)
	local s = p.drawGraph( frame.args[1], frame.args[2], true )
	return frame:callParserFunction{ name = '#tag', args = { 'graphviz', format='png', s } }
end

function p.reverse(frame)
	local s = p.drawGraph( frame.args[1], frame.args[2], false )
	return frame:callParserFunction{ name = '#tag', args = { 'graphviz', format='png', s } }
end

return p