-- Optional parameter |title is the page title, defaults to current page
-- Optional parameter |plain is either true for plain search (default) or false for Lua pattern search
-- Optional parameter |nomatch is the return value when no match is found; default is nil
p._findpagetext = function(args)
-- process parameters
local nomatch = args.nomatch or ""
if nomatch == "" then nomatch = nil end
---
local text = mw.text.trim(args[1] or args.text or "")
if text == "" then return nil end
---
local title = args.title or ""
local titleobj
if title == "" then
titleobj = mw.title.getCurrentTitle
else
titleobj = mw.title.new(title)
end
---
local plain = args.plain or ""
if plain:sub(1, 1) == "f" then plain = false else plain = true end
-- get the page content and look for 'text' - return position or nomatch
local content = titleobj and titleobj:getContent
return content and mw.ustring.find(content, text, 1, plain) or nomatch
end
p.findpagetext = function
local args = .args
local pargs = :getParent.args
for k, v in pairs(pargs) do
args[k] = v
end
if not (args[1] or args.text) then return nil end
-- just the first value
return (p._findpagetext(args))
end  
-- returns the decoded url. Inverse of parser function
-- Type is:
-- QUERY decodes + to space (default)
-- PATH does no extra decoding
-- WIKI decodes _ to space
p._urldecode = function(url, type)
url = url or ""
type = (type == "PATH" or type == "WIKI") and type
return mw.uri.decode( url, type )
end
---
p.urldecode = function
return mw.uri.decode( .args.url, .args.type )
end  
-- what follows was merged from Module:StringFunc  
-- helper functions
p._GetParameters = require('Module:GetParameters')  
-- Argument list helper function, as per Module:String
p._getParameters = p._GetParameters.getParameters  
-- Escape Pattern helper function so that all characters are treated as plain text, as per Module:String
function p._escapePattern( pattern_str )
return mw.ustring.gsub( pattern_str, "([%(%)%.%%%+%-%*%?%[%^%$%]])", "%%%1" )
end  
-- Helper Function to interpret boolean strings, as per Module:String
p._getBoolean = p._GetParameters.getBoolean  
---
Strip  
This function Strips characters from string  
Usage:  
Parameters
source: The string to strip
chars: The pattern or list of characters to strip from string, replaced with ''
plain: A flag indicating that the chars should be understood as plain text. defaults to true.  
Leading and trailing whitespace is also automatically stripped from the string.  
function p.strip
local new_args = p._getParameters( .args, {'source', 'chars', 'plain'} )
local source_str = new_args['source'] or ''
local chars = new_args['chars'] or '' or 'characters'
source_str = mw.text.trim(source_str)
if source_str == * or chars == * then
return source_str
end
local l_plain = p._getBoolean( new_args['plain'] or true )
if l_plain then
chars = p._escapePattern( chars )
end
local result
result = mw.ustring.gsub(source_str, "["..chars.."]", '')
return result
end  
---
Match any
Returns the index of the first given pattern to match the input. Patterns must be consecutively numbered.
Returns the empty string if nothing matches for use in  
Usage:
returns '2'.  
Parameters:
source: the string to search
plain: A flag indicating that the patterns should be understood as plain text. defaults to true.
1, 2, 3, ...: the patterns to search for  
function p.matchAny
local source_str = .args['source'] or error('The source parameter is mandatory.')
local l_plain = p._getBoolean( .args['plain'] or true )
for i = 1, math.huge do
local pattern = .args[i]
if not pattern then return '' end
if mw.ustring.find(source_str, pattern, 1, l_plain) then
return tostring(i)
end
end
end  
----------------------------< H Y P H E N _ T O _ D A S H >--------------------------------------------------  
Converts a hyphen to a dash under certain conditions. The hyphen must separate
like items; unlike items are returned unmodified. These forms are modified:
letter - letter (A - B)
digit - digit (4-5)
digit separator digit - digit separator digit (4.1-4.5 or 4-1-4-5)
letterdigit - letterdigit (A1-A5) (an optional separator between letter and
digit is supported – a.1-a.5 or a-1-a-5)
digitletter - digitletter (5a - 5d) (an optional separator between letter and
digit is supported – 5.a-5.d or 5-a-5-d)  
any other forms are returned unmodified.  
str may be a comma- or semicolon-separated list  
function p.hyphen_to_dash( str, spacing )
if (str == nil or str == '') then
return str
end  
local accept  
str = mw.text.decode(str, true ) -- replace html entities with their characters; semicolon mucks up the text.split  
local out = {}
local list = mw.text.split (str, '%s*[,;]%s*') -- split str at comma or semicolon separators if there are any  
for _, item in ipairs (list) do -- for each item in the list
item = mw.text.trim(item) -- trim whitespace
item, accept = item:gsub ('^%(%((.+)%)%)$', '%1')
if accept == 0 and mw.ustring.match (item, '^%w*[%.%-]?%w+%s*[%-–—]%s*%w*[%.%-]?%w+$') then -- if a hyphenated range or has endash or emdash separators
if item:match ('^%a+[%.%-]?%d+%s*%-%s*%a+[%.%-]?%d+$') or -- letterdigit hyphen letterdigit (optional separator between letter and digit)
item:match ('^%d+[%.%-]?%a+%s*%-%s*%d+[%.%-]?%a+$') or -- digitletter hyphen digitletter (optional separator between digit and letter)
item:match ('^%d+[%.%-]%d+%s*%-%s*%d+[%.%-]%d+$') or -- digit separator digit hyphen digit separator digit
item:match ('^%d+%s*%-%s*%d+$') or -- digit hyphen digit
item:match ('^%a+%s*%-%s*%a+$') then -- letter hyphen letter
item = item:gsub ('(%w*[%.%-]?%w+)%s*%-%s*(%w*[%.%-]?%w+)', '%1–%2') -- replace hyphen, remove extraneous space characters
else
item = mw.ustring.gsub (item, '%s*[–—]%s*', '–') -- for endash or emdash separated ranges, replace em with en, remove extraneous whitespace
end
end
table.insert (out, item) -- add the (possibly modified) item to the output table
end  
local temp_str = table.concat (out, ',' .. spacing) -- concatenate the output table into a comma separated string
temp_str, accept = temp_str:gsub ('^%(%((.+)%)%)$', '%1') -- remove accept-this-as-written markup when it wraps all of concatenated out
if accept ~= 0 then
temp_str = str:gsub ('^%(%((.+)%)%)$', '%1') -- when global markup removed, return original str; do it this way to suppress boolean second return value
end
return temp_str
end  
function p.hyphen2dash
local str = .args[1] or ''
local spacing = .args[2] or ' ' -- space is part of the standard separator for normal spacing (but in conjunction with templates r/rp/ran we may need a narrower spacing  
return p.hyphen_to_dash(str, spacing)
end  
-- Similar to Module:String#endswith
function p.startswith
return (.args[1]:sub(1, .args[2]:len) == .args[2]) and 'yes' or ''
end  
-- Implements Template:Isnumeric
function p.isnumeric
local s = .args[1] or :getParent.args[1]
local boolean = (.args.boolean or :getParent.args.boolean) == 'true'
if type(s) == 'string' and mw.getContentLanguage:parseFormattedNumber( s ) then
return boolean and 1 or s
end
return boolean and 0 or ''
end  
-- Checks if a value in a group of numbers is not an interger.
-- Allows usage of an |empty= parameter to allow empty values to be skipped.
function p.isInteger
local values = .args or :getParent.args
local allow_empty = .args.empty or :getParent.args.empty  
for _, value in ipairs(values) do
-- Trim spaces
value = value and value:gsub("^%s*(.-)%s*$", "%1")
if value == "" or value == nil then
if not allow_empty then
return false -- Empty values are not allowed
end
else
value = tonumber(value)
if not (type(value) == "number" and value == math.floor(value)) then
return false
end
end
end  
return true
end  
-- Returns an error found in a string.
function p.getError
local text = .args[1] or :getParent.args[1]
local error_message = text:match('(<strong>.-</strong>)')
return error_message or nil
end  
return p