Module:Template invocation

This is a meta-module for producing MediaWiki template invocations.

Usage

First load the module:

local mTemplateInvocation = require('Module:Template invocation')

Then you can use the individual functions as documented below.

Name

mTemplateInvocation.name(title)

This function produces the name to be used in a template invocation. For pages in the template namespace it returns the page name with no namespace prefix, for pages in the main namespace it returns the full page name prefixed with ":", and for other pages it returns the full page name. title can be a string or a mw.title object.

Invocation

mTemplateInvocation.invocation(name, args, format)

This function creates a MediaWiki template invocation.

Parameters:

• name - the name of the template (string, required). This should be exactly as it will appear in the invocation, e.g. for Template:Example use "Example". To generate the template name from a page name you can use the name function.
• args - the arguments to use in the invocation (table, required). Table keys and values must be either strings or numbers.
• format - the format of the invocation (string, optional). The default is a normal invocation with unescaped curly braces, pipes, and equals signs. If this parameter is the string "nowiki", then the curly braces, pipes and equals signs are replaced with the appropriate HTML entities.

Example

The code mTemplateInvocation.invocation('foo', {'bar', 'baz', abc = 'def'}) would produce {{foo|bar|baz|abc=def}}.

---

-- This module makes a template invocation from a template name and a table
-- of arguments.

local p = {}

function p.invocation(name, args, format)
	-- Copy the invocation args and convert magic words.
	-- We need to make a copy of the table rather than just using the original,
	-- as some of the values may be erased when building the invocation.
	local invArgs = {}
	for k, v in pairs(args) do
		invArgs[k] = v
	end

	-- Get the separators to use.
	local seps = {
		openb = '{{',
		closeb = '}}',
		pipe = '|',
		equals = '='
	}
	if format == 'nowiki' then
		for k, v in pairs(seps) do
			seps[k] = mw.text.nowiki(v)
		end
	end

	-- Build the invocation body with numbered args first, then named.
	local ret = {}
	ret[#ret + 1] = seps.openb
	ret[#ret + 1] = name
	for k, v in ipairs(invArgs) do
		if v:find('=', 1, true) then
			-- Likely something like 1=foo=bar, we need to do it as a named arg
			break
		end
		ret[#ret + 1] = seps.pipe
		ret[#ret + 1] = v
		invArgs[k] = nil -- Erase the key so that we don't add the value twice
	end
	for k, v in pairs(invArgs) do
		ret[#ret + 1] = seps.pipe
		ret[#ret + 1] = k
		ret[#ret + 1] = seps.equals
		ret[#ret + 1] = v
	end
	ret[#ret + 1] = seps.closeb

	return table.concat(ret)
end

return p