ওয়ার্ল্ডপিডিয়া

মডিউল:Arguments: সংশোধিত সংস্করণের মধ্যে পার্থক্য

← পুরনো সম্পাদনানতুনতর সম্পাদনা →
don't use "if frame == mw.getCurrentFrame()"
memoize nils, add type checks for frame and options, use string library functions instead of mw.text.trim and mw.ustring.find, define four different tidyVal functions to avoid checking options every time
১ নং লাইন: ১ নং লাইন:
-- This module provides easy processing of arguments passed to Scribunto from #invoke.
-- This module provides easy processing of arguments passed to Scribunto from #invoke.
-- It is intended for use by other Lua modules, and should not be called from #invoke directly.
-- It is intended for use by other Lua modules, and should not be called from #invoke directly.
local libraryUtil = require('libraryUtil')
local checkType = libraryUtil.checkType


local arguments = {}
local arguments = {}
local nilArg = {} -- Used for memoizing nil arguments in metaArgs.
-- Generate four different tidyVal functions, so that we don't have to check the options every time we call it.
local function tidyValDefault(key, val)
if type(val) == 'string' then
val = val:match('^%s*(.-)%s*$')
if val == '' then
return nil
else
return val
end
else
return val
end
end
local function tidyValTrimOnly(key, val)
if type(val) == 'string' then
return val:match('^%s*(.-)%s*$')
else
return val
end
end
local function tidyValRemoveBlanksOnly(key, val)
if type(val) == 'string' then
if val:find('%S') then
return val
else
return nil
end
else
return val
end
end
local function tidyValNoChange(key, val)
return val
end


function arguments.getArgs(frame, options)
function arguments.getArgs(frame, options)
options = type(options) == 'table' and options or {}
checkType('getArgs', 1, frame, 'table', true)
checkType('getArgs', 2, options, 'table', true)
frame = frame or {}
options = options or {}


-- Get the arguments from the frame object if available. If the frame object is not available, we are being called
-- Get the arguments from the frame object if available. If the frame object is not available, we are being called
-- from another Lua module or from the debug console, so put the args in a special table so we can differentiate them.
-- from another Lua module or from the debug console, so put the args in a special table so we can differentiate them.
local fargs, pargs, luaArgs
local fargs, pargs, luaArgs
if type(frame) == 'table' and type(frame.args) == 'table' and type(frame.getParent) == 'function' then
if type(frame.args) == 'table' and type(frame.getParent) == 'function' then
fargs = frame.args
if not options.parentOnly then
pargs = frame:getParent().args
fargs = frame.args
end
if not options.frameOnly then
pargs = frame:getParent().args
end
if options.parentFirst then
fargs, pargs = pargs, fargs
end
else
else
luaArgs = type(frame) == 'table' and frame or {}
luaArgs = frame
end
end


২২ নং লাইন: ৭৬ নং লাইন:
setmetatable(args, metatable)
setmetatable(args, metatable)


local function tidyVal(key, val)
-- Generate the tidyVal function. If it has been specified by the user, we use that; if not, we choose one of four functions
-- Processes a value according to the options given to getArguments. Can trim whitespace and remove blanks.
-- depending on the options chosen. This is so that we don't have to call the options table every time the function is called.
-- Keys are not used here, but they can be used by user-generated functions, so defining it here to avoid breakage.
local tidyVal = options.valueFunc
if type(val) == 'string' then
if tidyVal then
if options.trim ~= false then
if type(tidyVal) ~= 'function' then
val = mw.text.trim(val)
error("bad value assigned to option 'valueFunc' (function expected, got " .. type(tidyVal) .. ')', 2)
end
end
if options.removeBlanks == false or mw.ustring.find(val, '%S') then
elseif options.trim ~= false then
return val
if options.removeBlanks ~= false then
end
tidyVal = tidyValDefault
else
else
return val
tidyVal = tidyValTrimOnly
end
end
end
else
 
if options.removeBlanks ~= false then
-- Use a user-generated function to tidy the values if specified.
tidyVal = tidyValRemoveBlanksOnly
local valueFunc = options.valueFunc
if valueFunc then
local valueFuncType = type(valueFunc)
if valueFuncType == 'function' then
tidyVal = valueFunc
else
else
error('type error in option "valueFunc": expected function, got ' .. valueFuncType, 2)
tidyVal = tidyValNoChange
end
end
end
end
৫১ নং লাইন: ১০০ নং লাইন:
-- Accepts multiple tables as input and merges their keys and values into one table using the specified iterator.
-- Accepts multiple tables as input and merges their keys and values into one table using the specified iterator.
-- If a value is already present it is not overwritten; tables listed earlier have precendence.
-- If a value is already present it is not overwritten; tables listed earlier have precendence.
-- We are also memoizing nil values, but those values can be overwritten.
for _, t in ipairs(tables) do
for _, t in ipairs(tables) do
for key, val in iterator(t) do
for key, val in iterator(t) do
if metaArgs[key] == nil then
local metaArgsVal = metaArgs[key]
metaArgs[key] = tidyVal(key, val)
if metaArgsVal == nil or metaArgsVal == nilArg then
local tidiedVal = tidyVal(key, val)
if tidiedVal == nil then
metaArgs[key] = nilArg
else
metaArgs[key] = tidiedVal
end
end
end
end
end
৬১ নং লাইন: ১১৭ নং লাইন:


-- Set the order of precedence of the argument tables. If the variables are nil, nothing will be added to the table,
-- Set the order of precedence of the argument tables. If the variables are nil, nothing will be added to the table,
-- which is how we avoid clashes between the frame/parent args and the Lua args.
-- which is how we avoid clashes between the frame/parent args and the Lua args.
local argTables = {}
local argTables = {fargs}
if options.frameOnly then
argTables[#argTables + 1] = pargs
table.insert(argTables, fargs)
argTables[#argTables + 1] = luaArgs
elseif options.parentOnly then
table.insert(argTables, pargs)
elseif options.parentFirst then
table.insert(argTables, pargs)
table.insert(argTables, fargs)
else
table.insert(argTables, fargs)
table.insert(argTables, pargs)
end
table.insert(argTables, luaArgs)


--[[
--[[
-- Define metatable behaviour. Arguments are stored in the metaArgs table, and are only fetched from the
-- Define metatable behaviour. Arguments are memoized in the metaArgs table, and are only fetched from the
-- argument tables once. Also, we keep a record in the metatable of when pairs and ipairs have been called,
-- argument tables once. Nil arguments are also memoized using the nilArg variable in order to increase
-- so we do not run pairs and ipairs on fargs and pargs more than once. We also do not run ipairs on fargs
-- performance. Also, we keep a record in the metatable of when pairs and ipairs have been called, so we
-- and pargs if pairs has already been run, as all the arguments will already have been copied over.
-- do not run pairs and ipairs on fargs and pargs more than once. We also do not run ipairs on fargs and
-- pargs if pairs has already been run, as all the arguments will already have been copied over.
--]]
--]]
metatable.__index = function (t, key)
metatable.__index = function (t, key)
local val = metaArgs[key]
local val = metaArgs[key]
if val ~= nil then
if val ~= nil then
return val
if val == nilArg then
else
return nil
for i, argTable in ipairs(argTables) do
else
local argTableVal = tidyVal(key, argTable[key])
return val
if argTableVal ~= nil then
end
metaArgs[key] = argTableVal
end
return argTableVal
for _, argTable in ipairs(argTables) do
end
local argTableVal = tidyVal(key, argTable[key])
if argTableVal == nil then
metaArgs[key] = nilArg
else
metaArgs[key] = argTableVal
return argTableVal
end
end
end
end
return nil
end
end


metatable.__newindex = function (t, key, val)
metatable.__newindex = function (t, key, val)
if not options.readOnly and (not options.noOverwrite or args[key] == nil) then
if options.readOnly then
error('could not write to argument table key "' .. tostring(key) .. '"; the table is read-only', 2)
elseif options.noOverwrite and args[key] ~= nil then
error('could not write to argument table key "' .. tostring(key) .. '"; overwriting existing arguments is not permitted', 2)
elseif val == nil then
metaArgs[key] = nilArg -- Memoize nils.
else
metaArgs[key] = val
metaArgs[key] = val
end
end
'https://bn.worldpedia.org/wiki/মডিউল:Arguments' থেকে আনীত