>GKFX: Add optional caching layer for most-used templates via loadData. Reduces rendering time as tested on List_of_twin_towns_and_sister_cities_in_Germany

2021-05-05T20:40:05Z

Add optional caching layer for most-used templates via loadData. Reduces rendering time as tested on List_of_twin_towns_and_sister_cities_in_Germany

New page

local p = {}
local mostUsed = mw.loadData('Module:CountryData/summary')

local function getcontents(frame,country,params)
return frame:expandTemplate({title="Country data "..country;args=params})
end

function p.getcachedtable(frame, country, params)
country = mostUsed.redirects[country] or country
if params and next(params) then return p.gettable(frame, country, params) end
-- Uses mw.loadData to cache data for the most-used templates
if mostUsed.pages[country] then
local cache = mw.loadData('Module:CountryData/cache' .. mostUsed.pages[country])
if cache.data[country] then return cache.data[country] end
end
-- if not in cache
return p.gettable(frame, country, params)
end

function p.gettable(frame,country,params)
--Returns the parameters of a country data template as a Lua table
--If not a valid data template, return empty table
local bool, s = pcall(getcontents,frame,country,params or {})
if bool and (string.find(s,"^%{%{ *%{%{%{1") or string.find(s,"^%{%{safesubst: *%{%{%{1"))
then
--Replace parameter delimiters with arbitrary control characters
--to avoid clashes if param values contain equals/pipe signs
s = string.gsub(s,"|([^|=]-)=","\1\1%1\2")
s = string.gsub(s,"}}%s*$","\1")
--Loop over string and add params to table
local part = {}
for par in string.gmatch(s,"\1[^\1\2]-\2[^\1\2]-\1") do
local k = string.match(par,"\1%s*(.-)%s*\2")
local v = string.match(par,"\2%s*(.-)%s*\1")
if v and not (v=="" and string.find(k,"^flag alias")) then
part[k] = v
end
end
return part
else
return {}
end
end

function p.getalias(frame)
--Returns a single parameter value from a data template
local part = p.gettable(frame,frame.args[1])
if frame.args.variant
then return tostring(part[frame.args[2].."-"..frame.args.variant]
or part[frame.args[2]] or frame.args.def)
else return tostring(part[frame.args[2]] or frame.args.def)
end
end

function p.gettemplate(frame)
--For testing, recreates the country data from the created Lua table
--Get data table
local data = p.gettable(frame,frame.args[1])
--Concatenate fields into a template-like string
local out = "{{ {{{1}}}"
for k,v in pairs(data) do
out = out.."\n| "..k.." = "..v
end
return out.."\n}}"
end

return p

Module:CountryData - Revision history

>GKFX: Add optional caching layer for most-used templates via loadData. Reduces rendering time as tested on List_of_twin_towns_and_sister_cities_in_Germany