Module:Params
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Module DocumentationThis module was copied from Wikipedia, to facilitate the update to {{Template journal}} and {{Template journal inline}}. Visit the link to view it's documentation page.
--- ---
--- LOCAL ENVIRONMENT ---
--- ________________________________ ---
--- ---
-- Special user-given keywords (functions and modifiers MUST avoid these names)
local mkeywords = {
-- ['pattern'] = false,
['plain'] = true,
['or'] = 0
}
-- Set directives
local memoryslots = {
i = 'itersep',
p = 'pairsep',
h = 'header',
f = 'footer',
n = 'ifngiven'
}
-- The private table of functions
local library = {}
-- Return a copy or a reference to a table
local function copy_or_ref_table(src, refonly)
if refonly then return src end
newtab = {}
for key, val in pairs(src) do newtab[key] = val end
return newtab
end
-- Prepare the context
local function context_init(frame, funcname, refpipe, refparams)
local ctx = {}
ctx.iterfunc = pairs
ctx.pipe = copy_or_ref_table(frame.args, refpipe)
ctx.frame = frame:getParent()
ctx.params = copy_or_ref_table(ctx.frame.args, refparams)
return funcname(ctx)
end
-- Move to the next action within the user-given list
local function context_iterate(ctx, n_forward)
local nextfn
if ctx.pipe[n_forward] ~= nil then
nextfn = ctx.pipe[n_forward]:match'^%s*(.*%S)'
end
if nextfn == nil then
error('No function name was given', 0)
end
if library[nextfn] == nil then
error('The function "' .. nextfn .. '" does not exist', 0)
end
for idx = n_forward, 1, -1 do table.remove(ctx.pipe, idx) end
return library[nextfn](ctx)
end
-- Concatenate the numerical keys from the table of parameters to the numerical
-- keys from the table of options; non-numerical keys from the table of options
-- will prevail over colliding non-numerical keys from the table of parameters
local function concat_params(ctx)
local shift = table.maxn(ctx.pipe)
local newargs = {}
if ctx.subset == 1 then
-- We need only the sequence
for key, val in ipairs(ctx.params) do
newargs[key + shift] = val
end
else
if ctx.subset == -1 then
for key, val in ipairs(ctx.params) do
ctx.params[key] = nil
end
end
for key, val in pairs(ctx.params) do
if type(key) == 'number' then
newargs[key + shift] = val
else
newargs[key] = val
end
end
end
for key, val in pairs(ctx.pipe) do newargs[key] = val end
return newargs
end
local function do_for_each_param(ctx, fn)
local tbl = ctx.params
if ctx.subset == 1 then
for key, val in ipairs(tbl) do fn(key, val) end
return
end
if ctx.subset == -1 then
for key, val in ipairs(tbl) do tbl[key] = nil end
end
if ctx.dosort then
local nums = {}
local words = {}
for key, val in pairs(tbl) do
if type(key) == 'number' then
nums[#nums + 1] = key
else
words[#words + 1] = key
end
end
table.sort(nums)
table.sort(words)
for idx = 1, #nums do fn(nums[idx], tbl[nums[idx]]) end
for idx = 1, #words do fn(words[idx], tbl[words[idx]]) end
return
end
if ctx.subset ~= -1 then
for key, val in ipairs(tbl) do
fn(key, val)
tbl[key] = nil
end
end
for key, val in pairs(tbl) do fn(key, val) end
end
-- Parse the arguments of the `with_*_matching` class of modifiers
local function parse_match_args(opts, ptns, fname)
local state = 0
local cnt = 1
local keyw
for _, val in ipairs(opts) do
if state == 0 then
ptns[#ptns + 1] = { val, false }
state = -1
else
keyw = val:match'^%s*(.*%S)'
if keyw == nil or mkeywords[keyw] == nil then break
else
state = mkeywords[keyw]
if state ~= 0 then ptns[#ptns][2] = state end
end
end
cnt = cnt + 1
end
if state == 0 then error(fname .. ': No pattern was given', 0) end
return cnt
end
--[[ Piped modifiers ]]--
--------------------------------
-- See iface.sequential()
library.sequential = function(ctx)
if ctx.subset == -1 then error('The two directives "non-sequential" and "sequential" are in contradiction with each other', 0) end
if ctx.dosort then error('The "all_sorted" directive is redundant when followed by "sequential"', 0) end
ctx.iterfunc = ipairs
ctx.subset = 1
return context_iterate(ctx, 1)
end
-- See iface['non-sequential']()
library['non-sequential'] = function(ctx)
if ctx.subset == 1 then error('The two directives "sequential" and "non-sequential" are in contradiction with each other', 0) end
ctx.iterfunc = pairs
ctx.subset = -1
return context_iterate(ctx, 1)
end
-- See iface.all_sorted()
library.all_sorted = function(ctx)
if ctx.subset == 1 then error('The "all_sorted" directive is redundant after "sequential"', 0) end
ctx.dosort = true
return context_iterate(ctx, 1)
end
-- See iface.setting()
library.setting = function(ctx)
local opts = ctx.pipe
local cmd
if opts[1] ~= nil then
cmd = opts[1]:gsub('%s+', ''):gsub('/+', '/'):match'^/*(.*[^/])'
end
if cmd == nil then error('setting: No directive was given', 0) end
local sep = string.byte('/')
local argc = 2
local dest = {}
local vname
local chr
for idx = 1, #cmd do
chr = cmd:byte(idx)
if chr == sep then
for key, val in ipairs(dest) do
ctx[val] = opts[argc]
dest[key] = nil
end
argc = argc + 1
else
vname = memoryslots[string.char(chr)]
if vname == nil then error('setting: Unknown slot "' ..
string.char(chr) .. '"', 0) end
table.insert(dest, vname)
end
end
for key, val in ipairs(dest) do ctx[val] = opts[argc] end
return context_iterate(ctx, argc + 1)
end
-- See iface.squeezing()
library.squeezing = function(ctx)
local tbl = ctx.params
local store = {}
local indices = {}
for key, val in pairs(tbl) do
if type(key) == 'number' then
indices[#indices + 1] = key
store[key] = val
tbl[key] = nil
end
end
table.sort(indices)
for idx = 1, #indices do tbl[idx] = store[indices[idx]] end
return context_iterate(ctx, 1)
end
-- See iface.cutting()
library.cutting = function(ctx)
local lcut = tonumber(ctx.pipe[1])
if lcut == nil then error('cutting: Left cut must be a number', 0) end
local rcut = tonumber(ctx.pipe[2])
if rcut == nil then error('cutting: Right cut must be a number', 0) end
local tbl = ctx.params
local len = #tbl
if lcut < 0 then lcut = len + lcut end
if rcut < 0 then rcut = len + rcut end
local tot = lcut + rcut
if tot > 0 then
local cache = {}
if tot >= len then
for key, val in ipairs(tbl) do tbl[key] = nil end
tot = len
else
for idx = len - rcut + 1, len, 1 do tbl[idx] = nil end
for idx = 1, lcut, 1 do tbl[idx] = nil end
end
for key, val in pairs(tbl) do
if type(key) == 'number' and key > 0 then
if key > len then
cache[key - tot] = val
else
cache[key - lcut] = val
end
tbl[key] = nil
end
end
for key, val in pairs(cache) do tbl[key] = val end
end
return context_iterate(ctx, 3)
end
-- See iface.with_name_matching()
library.with_name_matching = function(ctx)
local tbl = ctx.params
local patterns = {}
local argc = parse_match_args(ctx.pipe, patterns, 'with_name_matching')
local nomatch
for key in pairs(tbl) do
nomatch = true
for _, ptn in ipairs(patterns) do
if string.find(key, ptn[1], 1, ptn[2]) then
nomatch = false
break
end
end
if nomatch then tbl[key] = nil end
end
return context_iterate(ctx, argc)
end
-- See iface.with_name_not_matching()
library.with_name_not_matching = function(ctx)
local tbl = ctx.params
local patterns = {}
local argc = parse_match_args(ctx.pipe, patterns,
'with_name_not_matching')
local yesmatch
for key in pairs(tbl) do
yesmatch = true
for _, ptn in ipairs(patterns) do
if not string.find(key, ptn[1], 1, ptn[2]) then
yesmatch = false
break
end
end
if yesmatch then tbl[key] = nil end
end
return context_iterate(ctx, argc)
end
-- See iface.with_value_matching()
library.with_value_matching = function(ctx)
local tbl = ctx.params
local patterns = {}
local argc = parse_match_args(ctx.pipe, patterns,
'with_value_matching')
local nomatch
for key, val in pairs(tbl) do
nomatch = true
for _, ptn in ipairs(patterns) do
if string.find(val, ptn[1], 1, ptn[2]) then
nomatch = false
break
end
end
if nomatch then tbl[key] = nil end
end
return context_iterate(ctx, argc)
end
-- See iface.with_value_not_matching()
library.with_value_not_matching = function(ctx)
local tbl = ctx.params
local patterns = {}
local argc = parse_match_args(ctx.pipe, patterns,
'with_value_not_matching')
local yesmatch
for key, val in pairs(tbl) do
yesmatch = true
for _, ptn in ipairs(patterns) do
if not string.find(val, ptn[1], 1, ptn[2]) then
yesmatch = false
break
end
end
if yesmatch then tbl[key] = nil end
end
return context_iterate(ctx, argc)
end
-- See iface.trimming_values()
library.trimming_values = function(ctx)
local tbl = ctx.params
for key, val in pairs(tbl) do tbl[key] = val:match'^%s*(.-)%s*$' end
return context_iterate(ctx, 1)
end
--[[ Piped functions ]]--
------------------------------------
-- See iface.count()
library.count = function(ctx)
local count = 0
for _ in ctx.iterfunc(ctx.params) do count = count + 1 end
if ctx.subset == -1 then count = count - #ctx.params end
return count
end
-- See iface.concat_and_call()
library.concat_and_call = function(ctx)
local opts = ctx.pipe
local tname
if opts[1] ~= nil then tname = opts[1]:match'^%s*(.*%S)' end
if tname == nil then error('concat_and_call: No template name was provided', 0) end
table.remove(opts, 1)
return ctx.frame:expandTemplate{
title = tname,
args = concat_params(ctx)
}
end
-- See iface.concat_and_invoke()
library.concat_and_invoke = function(ctx)
local opts = ctx.pipe
local mname
local fname
if opts[1] ~= nil then mname = opts[1]:match'^%s*(.*%S)' end
if mname == nil then error('concat_and_invoke: No module name was provided', 0) end
if opts[2] ~= nil then fname = opts[2]:match'^%s*(.*%S)' end
if fname == nil then error('concat_and_invoke: No function name was provided', 0) end
table.remove(opts, 2)
table.remove(opts, 1)
return require('Module:' .. mname)[fname](ctx.frame:newChild{
title = 'Module:' .. fname,
args = concat_params(ctx)
})
end
-- See iface.value_of()
library.value_of = function(ctx)
local opts = ctx.pipe
local keystr
if opts[1] ~= nil then keystr = opts[1]:match'^%s*(.*%S)' end
if keystr == nil then error('value_of: No parameter name was provided', 0) end
local keynum = tonumber(keystr)
if (
ctx.subset == -1 and keynum ~= nil and #ctx.params >= keynum
) or (
ctx.subset == 1 and (keynum == nil or #ctx.params < keynum)
) then return (ctx.ifngiven or '') end
local val = ctx.params[keynum or keystr]
if val == nil then return (ctx.ifngiven or '') end
return (ctx.header or '') .. val .. (ctx.footer or '')
end
-- See iface.list()
library.list = function(ctx)
local pps = ctx.itersep or ''
local kvs = ctx.pairsep or ''
local sep = ctx.header or ''
local las = ctx.footer or ''
local foo = ctx.ifngiven or ''
local ret = ''
do_for_each_param(
ctx,
function(key, val)
ret = ret .. sep .. key .. kvs .. val
sep = pps
foo = las
end
)
return ret .. foo
end
-- See iface.list_values()
library.list_values = function(ctx)
local pps = ctx.itersep or ''
local sep = ctx.header or ''
local las = ctx.footer or ''
local foo = ctx.ifngiven or ''
local ret = ''
do_for_each_param(
ctx,
function(key, val)
ret = ret .. sep .. val
sep = pps
foo = las
end
)
return ret .. foo
end
-- See iface.for_each()
library.for_each = function(ctx)
local pps = ctx.itersep or ''
local las = ctx.footer or ''
local sep = ctx.header or ''
local foo = ctx.ifngiven or ''
local txt = ctx.pipe[1] or ''
local ret = ''
do_for_each_param(
ctx,
function(key, val)
ret = ret .. sep .. string.gsub(
string.gsub(txt, '%$#', key),
'%$@',
val
)
sep = pps
foo = las
end
)
return ret .. foo
end
-- See iface.call_for_each()
library.call_for_each = function(ctx)
local opts = ctx.pipe
local tname
if opts[1] ~= nil then tname = opts[1]:match'^%s*(.*%S)' end
if tname == nil then error('call_for_each: No template name was provided', 0) end
local ccs = ctx.itersep or ''
local sep = ctx.header or ''
local las = ctx.footer or ''
local foo = ctx.ifngiven or ''
local model = { title = tname, args = opts }
local ret = ''
table.insert(opts, 1, true)
do_for_each_param(
ctx,
function(key, val)
opts[1] = key
opts[2] = val
ret = ret .. sep .. ctx.frame:expandTemplate(model)
sep = ccs
foo = las
end
)
return ret .. foo
end
-- See iface.invoke_for_each()
library.invoke_for_each = function(ctx)
local opts = ctx.pipe
local mname
local fname
if opts[1] ~= nil then mname = opts[1]:match'^%s*(.*%S)' end
if mname == nil then error('invoke_for_each: No module name was provided', 0) end
if opts[2] ~= nil then fname = opts[2]:match'^%s*(.*%S)' end
if fname == nil then error('invoke_for_each: No function name was provided', 0) end
local ccs = ctx.itersep or ''
local sep = ctx.header or ''
local las = ctx.footer or ''
local foo = ctx.ifngiven or ''
local model = { title = 'Module:' .. mname, args = opts }
local mfunc = require(model.title)[fname]
local ret = ''
do_for_each_param(
ctx,
function(key, val)
opts[1] = key
opts[2] = val
ret = ret .. sep .. mfunc(ctx.frame:newChild(model))
sep = ccs
foo = las
end
)
return ret .. foo
end
-- See iface.magic_for_each()
library.magic_for_each = function(ctx)
local opts = ctx.pipe
local magic
if opts[1] ~= nil then magic = opts[1]:match'^%s*(.*%S)' end
if magic == nil then error('magic_for_each: No parser function was provided', 0) end
local ccs = ctx.itersep or ''
local sep = ctx.header or ''
local las = ctx.footer or ''
local foo = ctx.ifngiven or ''
local ret = ''
table.insert(opts, 1, true)
do_for_each_param(
ctx,
function(key, val)
opts[1] = key
opts[2] = val
ret = ret .. sep .. ctx.frame:callParserFunction(magic, opts)
sep = ccs
foo = las
end
)
return ret .. foo
end
-- See iface.call_for_each_value()
library.call_for_each_value = function(ctx)
local opts = ctx.pipe
local tname
if opts[1] ~= nil then tname = opts[1]:match'^%s*(.*%S)' end
if tname == nil then error('call_for_each_value: No template name was provided', 0) end
local ccs = ctx.itersep or ''
local sep = ctx.header or ''
local las = ctx.footer or ''
local foo = ctx.ifngiven or ''
local model = { title = tname, args = opts }
local ret = ''
do_for_each_param(
ctx,
function(key, val)
opts[1] = val
ret = ret .. sep .. ctx.frame:expandTemplate(model)
sep = ccs
foo = las
end
)
return ret .. foo
end
-- See iface.invoke_for_each_value()
library.invoke_for_each_value = function(ctx)
local opts = ctx.pipe
local mname
local fname
if opts[1] ~= nil then mname = opts[1]:match'^%s*(.*%S)' end
if mname == nil then error('invoke_for_each_value: No module name was provided', 0) end
if opts[2] ~= nil then fname = opts[2]:match'^%s*(.*%S)' end
if fname == nil then error('invoke_for_each_value: No function name was provided', 0) end
local ccs = ctx.itersep or ''
local sep = ctx.header or ''
local las = ctx.footer or ''
local foo = ctx.ifngiven or ''
local model = { title = 'Module:' .. mname, args = opts }
local mfunc = require(model.title)[fname]
local ret = ''
table.remove(opts, 1)
do_for_each_param(
ctx,
function(key, val)
opts[1] = val
ret = ret .. sep .. mfunc(ctx.frame:newChild(model))
sep = ccs
foo = las
end
)
return ret .. foo
end
-- See iface.magic_for_each_value()
library.magic_for_each_value = function(ctx)
local opts = ctx.pipe
local magic
if opts[1] ~= nil then magic = opts[1]:match'^%s*(.*%S)' end
if magic == nil then error('magic_for_each_value: No parser function was provided', 0) end
local ccs = ctx.itersep or ''
local sep = ctx.header or ''
local las = ctx.footer or ''
local foo = ctx.ifngiven or ''
local ret = ''
do_for_each_param(
ctx,
function(key, val)
opts[1] = val
ret = ret .. sep .. ctx.frame:callParserFunction(magic,
opts)
sep = ccs
foo = las
end
)
return ret .. foo
end
--- ---
--- PUBLIC ENVIRONMENT ---
--- ________________________________ ---
--- ---
-- The public table of functions
local iface = {}
--[[ Non-piped modifiers ]]--
------------------------------------
-- Syntax: #invoke:params|sequential|function name
iface.sequential = function(frame)
return context_init(frame, library.sequential, false, false)
end
-- Syntax: #invoke:params|non-sequential|function name
iface['non-sequential'] = function(frame)
return context_init(frame, library['non-sequential'], false, false)
end
-- Syntax: #invoke:params|sort|function name
iface.all_sorted = function(frame)
return context_init(frame, library.all_sorted, false, false)
end
-- Syntax: #invoke:params|setting|directives|...|function name
iface.setting = function(frame)
return context_init(frame, library.setting, false, false)
end
-- Syntax: #invoke:params|squeezing|function name
iface.squeezing = function(frame)
return context_init(frame, library.squeezing, false, false)
end
-- Syntax: #invoke:params|cutting|left cut|right cut|function name
iface.cutting = function(frame)
return context_init(frame, library.cutting, false, false)
end
-- Syntax: #invoke:params|with_name_matching|pattern 1|[plain flag 1]|[or]
-- |[pattern 2]|[plain flag 2]|[or]|[...]|[pattern N]|[plain flag
-- N]|function name
iface.with_name_matching = function(frame)
return context_init(frame, library.with_name_matching, false, false)
end
-- Syntax: #invoke:params|with_name_not_matching|pattern 1|[plain flag 1]
-- |[and]|[pattern 2]|[plain flag 2]|[and]|[...]|[pattern N]|[plain
-- flag N]|function name
iface.with_name_not_matching = function(frame)
return context_init(frame, library.with_name_not_matching, false,
false)
end
-- Syntax: #invoke:params|with_value_matching|pattern 1|[plain flag 1]|[or]
-- |[pattern 2]|[plain flag 2]|[or]|[...]|[pattern N]|[plain flag
-- N]|function name
iface.with_value_matching = function(frame)
return context_init(frame, library.with_value_matching, false, false)
end
-- Syntax: #invoke:params|with_value_not_matching|pattern 1|[plain flag 1]
-- |[and]|[pattern 2]|[plain flag 2]|[and]|[...]|[pattern N]|[plain
-- flag N]|function name
iface.with_value_not_matching = function(frame)
return context_init(frame, library.with_value_not_matching, false,
false)
end
-- Syntax: #invoke:params|trimming_values|function name
iface.trimming_values = function(frame)
return context_init(frame, library.trimming_values, false, false)
end
--[[ Non-piped functions ]]--
----------------------------------------
-- Syntax: #invoke:params|count
iface.count = function(frame)
return context_init(frame, library.count, true, true)
end
-- Syntax: #invoke:args|concat_and_call|template name|[prepend 1]|[prepend 2]
-- |[...]|[item n]|[named item 1=value 1]|[...]|[named item n=value
-- n]|[...]
iface.concat_and_call = function(frame)
return context_init(frame, library.concat_and_call, false, true)
end
-- Syntax: #invoke:args|concat_and_invoke|module name|function name|[prepend
-- 1]|[prepend 2]|[...]|[item n]|[named item 1=value 1]|[...]|[named
-- item n=value n]|[...]
iface.concat_and_invoke = function(frame)
return context_init(frame, library.concat_and_invoke, false, true)
end
-- Syntax: #invoke:params|value_of|parameter name
iface.value_of = function(frame)
return context_init(frame, library.value_of, true, true)
end
-- Syntax: #invoke:params|list
iface.list = function(frame)
return context_init(frame, library.list, true, false)
end
-- Syntax: #invoke:params|list_values
iface.list_values = function(frame)
return context_init(frame, library.list_values, true, false)
end
-- Syntax: #invoke:params|for_each|wikitext
iface.for_each = function(frame)
return context_init(frame, library.for_each, true, false)
end
-- Syntax: #invoke:params|call_for_each|template name|[append 1]|[append 2]
-- |[...]|[append n]|[named param 1=value 1]|[...]|[named param
-- n=value n]|[...]
iface.call_for_each = function(frame)
return context_init(frame, library.call_for_each, false, false)
end
-- Syntax: #invoke:params|invoke_for_each|module name|module function|[append
-- 1]|[append 2]|[...]|[append n]|[named param 1=value 1]|[...]
-- |[named param n=value n]|[...]
iface.invoke_for_each = function(frame)
return context_init(frame, library.invoke_for_each, false, false)
end
-- Syntax: #invoke:params|magic_for_each|parser function|[append 1]|[append 2]
-- |[...]|[append n]|[named param 1=value 1]|[...]|[named param
-- n=value n]|[...]
iface.magic_for_each = function(frame)
return context_init(frame, library.magic_for_each, false, false)
end
-- Syntax: #invoke:params|call_for_each_value|template name|[append 1]|[append
-- 2]|[...]|[append n]|[named param 1=value 1]|[...]|[named param
-- n=value n]|[...]
iface.call_for_each_value = function(frame)
return context_init(frame, library.call_for_each_value, false, false)
end
-- Syntax: #invoke:params|invoke_for_each_value|module name|[append 1]|[append
-- 2]|[...]|[append n]|[named param 1=value 1]|[...]|[named param
-- n=value n]|[...]
iface.invoke_for_each_value = function(frame)
return context_init(frame, library.invoke_for_each_value, false, false)
end
-- Syntax: #invoke:params|magic_for_each_value|parser function|[append 1]
-- |[append 2]|[...]|[append n]|[named param 1=value 1]|[...]|[named
-- param n=value n]|[...]
iface.magic_for_each_value = function(frame)
return context_init(frame, library.magic_for_each_value, false, false)
end
return iface