Module:Graph

-- version 2016-01-06 _PLEASE UPDATE when modifying anything_ local p = {}

local baseMapDirectory = "Module:Graph/"

local function numericArray(csv) if not csv then return end

local list = mw.text.split(csv, "%s*,%s*") local result = {} local isInteger = true for i = 1, #list do		result[i] = tonumber(list[i]) if not result[i] then return end if isInteger then local int, frac = math.modf(result[i]) isInteger = frac == 0.0 end end return result, isInteger end

local function stringArray(csv) if not csv then return end

return mw.text.split(csv, "%s*,%s*") end

local function isTable(t) return type(t) == "table" end

function p.map(frame) -- map path data for geographic objects local basemap = frame.args.basemap or "WorldMap-iso2.json" -- scaling factor local scale = tonumber(frame.args.scale) or 100 -- map projection, see https://github.com/mbostock/d3/wiki/Geo-Projections local projection = frame.args.projection or "equirectangular" -- defaultValue for geographic objects without data local defaultValue = frame.args.defaultValue local scaleType = frame.args.scaleType or "linear" -- minimaler Wertebereich (nur für numerische Daten) local domainMin = tonumber(frame.args.domainMin) -- maximaler Wertebereich (nur für numerische Daten) local domainMax = tonumber(frame.args.domainMax) -- Farbwerte der Farbskala (nur für numerische Daten) local colorScale = frame.args.colorScale or "category10" -- show legend local legend = frame.args.legend -- format JSON output local formatJson = frame.args.formatjson

-- map data are key-value pairs: keys are non-lowercase strings (ideally ISO codes) which need to match the "id" values of the map path data local values = {} local isNumbers = nil for name, value in pairs(frame.args) do		if mw.ustring.find(name, "^[^%l]+$") then if isNumbers == nil then isNumbers = tonumber(value) end local data = { id = name, v = value } if isNumbers then data.v = tonumber(data.v) end table.insert(values, data) end end if not defaultValue then if isNumbers then defaultValue = 0 else defaultValue = "silver" end end

-- create highlight scale local scales if isNumbers then if colorScale == "category10" or colorScale == "category20" then else colorScale = stringArray(colorScale) end scales = {			{				name = "color", type = scaleType, domain = { data = "highlights", field = "v" }, range = colorScale, nice = true }		}		if domainMin then scales[1].domainMin = domainMin end if domainMax then scales[1].domainMax = domainMax end

local exponent = string.match(scaleType, "pow%s+(%d+%.?%d+)") -- check for exponent if exponent then scales[1].type = "pow" scales[1].exponent = exponent end end

-- create legend if legend then legend = {			{				fill = "color", offset = 120, properties = {					title = { fontSize = { value = 14 } }, labels = { fontSize = { value = 12 } }, legend = {						stroke = { value = "silver" }, strokeWidth = { value = 1.5 } }				}			}		}	end

-- get map url local basemapUrl if (string.sub(basemap, 1, 7) == "http://") or (string.sub(basemap, 1, 8) == "https://") or (string.sub(basemap, 1, 2) == "//") then basemapUrl = basemap else -- if not a (supported) url look for a colon as namespace separator. If none prepend default map directory name. if not string.find(basemap, ":") then basemap = baseMapDirectory .. basemap end basemapUrl = mw.title.new(basemap):fullUrl("action=raw") end

local output = {		version = 2, width = 1, -- generic value as output size depends solely on map size and scaling factor height = 1, -- ditto data = {			{				-- data source for the highlights name = "highlights", values = values },			{				-- data source for map paths data name = "countries", url = basemapUrl, format = { type = "topojson", feature = "countries" }, transform = {					{						-- geographic transformation ("geopath") of map paths data type = "geopath", value = "data",			-- data source scale = scale, translate = { 0, 0 }, projection = projection },					{						-- join ("zip") of mutiple data source: here map paths data and highlights type = "lookup", keys = { "id" },     -- key for map paths data on = "highlights",   -- name of highlight data source onKey = "id",        -- key for highlight data source as = { "zipped" },   -- name of resulting table default = { v = defaultValue } -- default value for geographic objects that could not be joined }				}			}		},		marks = {			-- output markings (map paths and highlights) {				type = "path", from = { data = "countries" }, properties = {					enter = { path = { field = "layout_path" } }, update = { fill = { field = "zipped.v" } }, hover = { fill = { value = "darkgrey" } } }			}		},		legends = legend }	if (scales) then output.scales = scales output.marks[1].properties.update.fill.scale = "color" end

local flags if formatJson then flags = mw.text.JSON_PRETTY end return mw.text.jsonEncode(output, flags) end

local function deserializeXData(serializedX, xType, xMin, xMax) local x

if not xType or xType == "integer" or xType == "number" then local isInteger x, isInteger = numericArray(serializedX) if x then xMin = tonumber(xMin) xMax = tonumber(xMax) if not xType then if isInteger then xType = "integer" else xType = "number" end end else if xType then error("Numbers expected for parameter 'x'") end end end if not x then x = stringArray(serializedX) if not xType then xType = "string" end end

return x, xType, xMin, xMax end

local function deserializeYData(serializedYs, yType, yMin, yMax) local y = {} local areAllInteger = true

for yNum, value in pairs(serializedYs) do		local yValues if not yType or yType == "integer" or yType == "number" then local isInteger yValues, isInteger = numericArray(value) if yValues then areAllInteger = areAllInteger and isInteger else if yType then error("Numbers expected for parameter '" .. name .. "'") else return deserializeYData(serializedYs, "string", yMin, yMax) end end end if not yValues then yValues = stringArray(value) end

y[yNum] = yValues end if not yType then if areAllInteger then yType = "integer" else yType = "number" end end if yType == "integer" or yType == "number" then yMin = tonumber(yMin) yMax = tonumber(yMax) end

return y, yType, yMin, yMax end

local function convertXYToManySeries(x, y, xType, yType, seriesTitles) local data = {		name = "chart", format = {			type = "json", parse = { x = xType, y = yType } },		values = {} }	for i = 1, #y do		for j = 1, #x do			if j <= #y[i] then table.insert(data.values, { series = seriesTitles[i], x = x[j], y = y[i][j] }) end end end return data end

local function convertXYToSingleSeries(x, y, xType, yType, yNames) local data = { name = "chart", format = { type = "json", parse = { x = xType } }, values = {} }

for j = 1, #y do data.format.parse[yNames[j]] = yType end

for i = 1, #x do		local item = { x = x[i] } for j = 1, #y do item[yNames[j]] = y[j][i] end

table.insert(data.values, item) end return data end

local function getXScale(chartType, stacked, xMin, xMax, xType) if chartType == "pie" then return end

local xscale = {		name = "x", type = "linear", range = "width", zero = false, -- do not include zero value nice = true, -- force round numbers for y scale domain = { data = "chart", field = "x" } }	if xMin then xscale.domainMin = xMin end if xMax then xscale.domainMax = xMax end if xMin or xMax then xscale.clamp = true end if chartType == "rect" then xscale.type = "ordinal" if not stacked then xscale.padding = 0.2 end -- pad each bar group else if xType == "date" then xscale.type = "time" elseif xType == "string" then xscale.type = "ordinal" end end

return xscale end

local function getYScale(chartType, stacked, yMin, yMax, yType) if chartType == "pie" then return end

local yscale = {		name = "y", type = "linear", range = "height", -- area charts have the lower boundary of their filling at y=0 (see marks.properties.enter.y2), therefore these need to start at zero zero = chartType ~= "line", nice = true }	if yMin then yscale.domainMin = yMin end if yMax then yscale.domainMax = yMax end if yMin or yMax then yscale.clamp = true end if yType == "date" then yscale.type = "time" elseif yType == "string" then yscale.type = "ordinal" end if stacked then yscale.domain = { data = "stats", field = "sum_y" } else yscale.domain = { data = "chart", field = "y" } end

return yscale end

local function getColorScale(colors, chartType, xCount, yCount) if not colors then if (chartType == "pie" and xCount > 10) or yCount > 10 then colors = "category20" else colors = "category10" end end

local colorScale = {		name = "color", type = "ordinal", range = colors, domain = { data = "chart", field = "series" } }	if chartType == "pie" then colorScale.domain.field = "x" end return colorScale end

local function getAlphaColorScale(colors, y)	local alphaScale -- if there is at least one color in the format "#aarrggbb", create a transparency (alpha) scale if isTable(colors) then local alphas = {} local hasAlpha = false for i = 1, #colors do			local a, rgb = string.match(colors[i], "#(%x%x)(%x%x%x%x%x%x)") if a then hasAlpha = true alphas[i] = tostring(tonumber(a, 16) / 255.0) colors[i] = "#" .. rgb else alphas[i] = "1" end end for i = #colors + 1, #y do alphas[i] = "1" end if hasAlpha then alphaScale = { name = "transparency", type = "ordinal", range = alphas } end end return alphaScale end

local function getValueScale(fieldName, min, max, type) local valueScale = {		name = fieldName, type = type or "linear", domain = { data = "chart", field = fieldName }, range = { min, max } }	return valueScale end

local function addInteractionToChartVisualisation(plotMarks, colorField, dataField) -- initial setup if not plotMarks.properties.enter then plotMarks.properties.enter = {} end plotMarks.properties.enter[colorField] = { scale = "color", field = dataField }

-- action when cursor is over plot mark: highlight if not plotMarks.properties.hover then plotMarks.properties.hover = {} end plotMarks.properties.hover[colorField] = { value = "red" }

-- action when cursor leaves plot mark: reset to initial setup if not plotMarks.properties.update then plotMarks.properties.update = {} end plotMarks.properties.update[colorField] = { scale = "color", field = dataField } end

local function getPieChartVisualisation(yCount, innerRadius, outerRadius, linewidth, radiusScale) local chartvis = {		type = "arc", from = { data = "chart", transform = { { field = "y", type = "pie" } } },

properties = {			enter = { innerRadius = { value = innerRadius }, outerRadius = { }, startAngle = { field = "layout_start" }, endAngle = { field = "layout_end" }, stroke = { value = "white" }, strokeWidth = { value = linewidth or 1 } }		}	}	if radiusScale then chartvis.properties.enter.outerRadius.scale = radiusScale.name chartvis.properties.enter.outerRadius.field = radiusScale.domain.field else chartvis.properties.enter.outerRadius.value = outerRadius end

addInteractionToChartVisualisation(chartvis, "fill", "x")

return chartvis end

local function getChartVisualisation(chartType, stacked, colorField, yCount, innerRadius, outerRadius, linewidth, alphaScale, radiusScale, interpolate) if chartType == "pie" then return getPieChartVisualisation(yCount, innerRadius, outerRadius, linewidth, radiusScale) end

local chartvis = {		type = chartType, properties = {			-- chart creation event handler enter = {				x = { scale = "x", field = "x" }, y = { scale = "y", field = "y" } }		}	}	addInteractionToChartVisualisation(chartvis, colorField, "series") if colorField == "stroke" then chartvis.properties.enter.strokeWidth = { value = linewidth or 2.5 } end

if interpolate then chartvis.properties.enter.interpolate = { value = interpolate } end

if alphaScale then chartvis.properties.update[colorField .. "Opacity"] = { scale = "transparency" } end -- for bars and area charts set the lower bound of their areas if chartType == "rect" or chartType == "area" then if stacked then -- for stacked charts this lower bound is the end of the last stacking element chartvis.properties.enter.y2 = { scale = "y", field = "layout_end" } else --			for non-stacking charts the lower bound is y=0			TODO: "yscale.zero" is currently set to "true" for this case, but "false" for all other cases.			For the similar behavior "y2" should actually be set to where y axis crosses the x axis,			if there are only positive or negative values in the data chartvis.properties.enter.y2 = { scale = "y", value = 0 } end end -- for bar charts ... if chartType == "rect" then -- set 1 pixel width between the bars chartvis.properties.enter.width = { scale = "x", band = true, offset = -1 } -- for multiple series the bar marking needs to use the "inner" series scale, whereas the "outer" x scale is used by the grouping if not stacked and yCount > 1 then chartvis.properties.enter.x.scale = "series" chartvis.properties.enter.x.field = "series" chartvis.properties.enter.width.scale = "series" end end -- stacked charts have their own (stacked) y values if stacked then chartvis.properties.enter.y.field = "layout_start" end

-- if there are multiple series group these together if yCount == 1 then chartvis.from = { data = "chart" } else -- if there are multiple series, connect colors to series chartvis.properties.update[colorField].field = "series" if alphaScale then chartvis.properties.update[colorField .. "Opacity"].field = "series" end -- apply a grouping (facetting) transformation chartvis = {			type = "group", marks = { chartvis }, from = {				data = "chart", transform = {					{						type = "facet", groupby = { "series" } }				}			}		}		-- for stacked charts apply a stacking transformation if stacked then table.insert(chartvis.from.transform, 1, { type = "stack", groupby = { "x" }, sortby = { "series" }, field = "y" } ) else -- for bar charts the series are side-by-side grouped by x			if chartType == "rect" then -- for bar charts with multiple series: each serie is grouped by the x value, therefore the series need their own scale within each x group local groupScale = {					name = "series", type = "ordinal", range = "width", domain = { field = "series" } }

chartvis.from.transform[1].groupby = "x" chartvis.scales = { groupScale } chartvis.properties = { enter = { x = { field = "key", scale = "x" }, width = { scale = "x", band = true } } } end end end

return chartvis end

local function getTextMarks(chartType, outerRadius, radiusScale) local textmarks if chartType == "pie" then textmarks = {			type = "text", from = { data = "chart", transform = { { field = "y", type = "pie" } } }, properties = {				enter = {					x = { group = "width", mult = 0.5 }, y = { group = "height", mult = 0.5 }, radius = { offset = -4 }, theta = { field = "layout_mid" }, fill = { value = "white" }, align = { value = "center" }, baseline = { value = "top" }, text = { field = "y" }, angle = { field = "layout_mid", mult = 180.0 / math.pi }, fontSize = { value = math.ceil(outerRadius / 10) } }			}		}		if radiusScale then textmarks.properties.enter.radius.scale = radiusScale.name textmarks.properties.enter.radius.field = radiusScale.domain.field else textmarks.properties.enter.radius.value = outerRadius end end return textmarks end

local function getAxes(xTitle, xFormat, xType, yTitle, yFormat, yType, chartType) local xAxis, yAxis if chartType ~= "pie" then if xType == "integer" and not xFormat then xFormat = "d" end xAxis = {			type = "x", scale = "x", title = xTitle, format = xFormat }

if yType == "integer" and not yFormat then yFormat = "d" end yAxis = {			type = "y", scale = "y", title = yTitle, format = yFormat }	end

return xAxis, yAxis end

local function getLegend(legendTitle, chartType, outerRadius) local legend = {		fill = "color", stroke = "color", title = legendTitle, }	if chartType == "pie" then -- move legend from center position to top legend.properties = { legend = { y = { value = -outerRadius } } } end return legend end

function p.chart(frame) -- chart width and height local graphwidth = tonumber(frame.args.width) or 200 local graphheight = tonumber(frame.args.height) or 200 -- chart type local chartType = frame.args.type or "line" -- interpolation mode for line and area charts: linear, step-before, step-after, basis, basis-open, basis-closed (type=line only), bundle (type=line only), cardinal, cardinal-open, cardinal-closed (type=line only), monotone local interpolate = frame.args.interpolate -- mark colors (if no colors are given, the default 10 color palette is used) local colors = stringArray(frame.args.colors) -- for line charts, the thickness of the line; for pie charts the gap between each slice local linewidth = tonumber(frame.args.linewidth) -- x and y axis caption local xTitle = frame.args.xAxisTitle local yTitle = frame.args.yAxisTitle -- x and y value types local xType = frame.args.xType local yType = frame.args.yType -- override x and y axis minimum and maximum local xMin = frame.args.xAxisMin local xMax = frame.args.xAxisMax local yMin = frame.args.yAxisMin local yMax = frame.args.yAxisMax -- override x and y axis label formatting local xFormat = frame.args.xAxisFormat local yFormat = frame.args.yAxisFormat -- show legend with given title local legendTitle = frame.args.legend -- show values as text local showValues = frame.args.showValues -- pie chart radiuses local innerRadius = tonumber(frame.args.innerRadius) or 0 local outerRadius = math.min(graphwidth, graphheight) -- format JSON output local formatJson = frame.args.formatjson

-- get x values local x	x, xType, xMin, xMax = deserializeXData(frame.args.x, xType, xMin, xMax)

-- get y values (series) local yValues = {} local seriesTitles = {} for name, value in pairs(frame.args) do		local yNum if name == "y" then yNum = 1 else yNum = tonumber(string.match(name, "^y(%d+)$")) end if yNum then yValues[yNum] = value -- name the series: default is "y ". Can be overwritten using the "y Title" parameters. seriesTitles[yNum] = frame.args["y" .. yNum .. "Title"] or name end end local y	y, yType, yMin, yMax = deserializeYData(yValues, yType, yMin, yMax)

-- create data tuples, consisting of series index, x value, y value local data if chartType == "pie" then -- for pie charts the second second series is merged into the first series as radius values data = convertXYToSingleSeries(x, y, xType, yType, { "y", "r" }) else data = convertXYToManySeries(x, y, xType, yType, seriesTitles) end

-- configure stacked charts local stacked = false local stats if string.sub(chartType, 1, 7) == "stacked" then chartType = string.sub(chartType, 8) if #y > 1 then -- ignore stacked charts if there is only one series stacked = true -- aggregate data by cumulative y values stats = {				name = "stats", source = "chart", transform = {					{						type = "aggregate", groupby = { "x" }, summarize = { y = "sum" } }				}			}		end end

-- create scales local scales = {}

local xscale = getXScale(chartType, stacked, xMin, xMax, xType) table.insert(scales, xscale) local yscale = getYScale(chartType, stacked, yMin, yMax, yType) table.insert(scales, yscale)

local colorScale = getColorScale(colors, chartType, #x, #y) table.insert(scales, colorScale)

local alphaScale = getAlphaColorScale(colors, y)	table.insert(scales, alphaScale)

local radiusScale if chartType == "pie" and #y > 1 then radiusScale = getValueScale("r", 0, outerRadius) table.insert(scales, radiusScale) end

-- decide if lines (strokes) or areas (fills) should be drawn local colorField if chartType == "line" then colorField = "stroke" else colorField = "fill" end

-- create chart markings local chartvis = getChartVisualisation(chartType, stacked, colorField, #y, innerRadius, outerRadius, linewidth, alphaScale, radiusScale, interpolate)

-- text marks local textmarks if showValues then textmarks = getTextMarks(chartType, outerRadius, radiusScale) end

-- axes local xAxis, yAxis = getAxes(xTitle, xFormat, xType, yTitle, yFormat, yType, chartType)

-- legend local legend if legendTitle then legend = getLegend(legendTitle, chartType, outerRadius) end

-- construct final output object local output = {		version = 2, width = graphwidth, height = graphheight, data = { data, stats }, scales = scales, axes = { xAxis, yAxis }, marks = { chartvis, textmarks }, legends = { legend } }

local flags if formatJson then flags = mw.text.JSON_PRETTY end return mw.text.jsonEncode(output, flags) end

function p.mapWrapper(frame) return p.map(frame:getParent) end

function p.chartWrapper(frame) return p.chart(frame:getParent) end

return p