Module:Infobox

Creating a template step-by-step

Import Module:Infobox

local infobox = require('Module:Infobox')

Unpack the frame arguments

function p.main(frame)
	local args = frame:getParent().args
	...

Define an Infobox object

Main article: Module:Infobox §

	local ret = infobox.new(args)

Map your arguments to functions

Main article: Module:Infobox §

	ret:defineParams {
			...
	}

Parse your arguments

Main article: Module:Infobox §

	ret:cleanParams()

Initialise your HTML

Main article: Module:Infobox §

	ret:create()

Name your infobox

Main article: Module:Infobox §

	-- note: we don't use the "Template:" namespace prefix
	ret:defineName('Infobox FooBar')

Give your infobox custom behaviour

Main articles: Module:Infobox §, Module:Infobox §, and Module:Infobox §

	ret:addClass(...)
	ret:useSMW({ ... })
	ret:defineLinks({ ... })

Give your infobox a caption

Main article: Module:Infobox §

	ret:caption()

Format your table

Main article: Module:Infobox §

	ret:addRow{ ... }
		:addRow{ ... }

Finalise your template

Main article: Module:Infobox §

	ret:finish()

Functions

Public functions

For the example snippets below, ret is an arbitrary infobox initiated as:

	local ret = Infobox.new(args)

Priority

Certain functions rely on information created by other functions, and thus must be run in a particular order:

0	new
1	defineParams
2	create maxVersion
3	cleanParams setMaxButtons noSwitch
4	other functions
5	finish

nilParam

	Infobox.nilParam()

Returns the value of the placeholder value Infobox.nil_param. This value is generally not seen, but it is used to fill switchbox data as nil causes unwanted behaviour.

isDefined

	Infobox.isDefined(arg)

Checks whether the value arg can be considered as defined.

new

	Infobox.new(args)

Creates a new infobox object with args as a table of values passed from the template invocation.

This function also creates the top-level wrapper and sets a metatable for the infobox.

create

	ret:create()

Creates the HTML tags used for the infobox itself. Will run maxVersion() if it has not been run already.

defineName

	ret:defineName(arg)

Defines the name of the infobox. This should be the base pagename; i.e. no "Template:" namespace prefix.

defineLinks

	ret:defineLinks(tbl)

Defines any number of infobox bottom links in a table whose elements are table variables formatted as such:

	{
		{ link, label },
		...
	}

link and label should be string variables that will, in a basic sense, define [[Link|label]].

In a more technical sense, link and label help form a string for string.format(), with the module using the equivalent of (but not exactly):

	string.format('[[['..link..'|'..label..']]]',...)

The template name itself can be called up to 5 times by using "%s", in either link or label.

setMaxButtons

	ret:setMaxButtons(n)

Changes the behaviour of buttons by defining the maximum number of buttons that are allowed to appear. If the version count exceeds the button count, their buttons will be replaced with a drop down menu. If not run, the maximum button count will be 5.

cleanParams

	ret:cleanParams()

Parses the parameters with their mapped functions.

defineParams

	ret:defineParams{
		...
	}

Maps parameters to functions as defined by a table formatted as such:

	{ name = <param>, func = <func>, dupes = true },

param should be a string that names the parameter as it will be in references for use in other functions.

func should be a function or instructions on how to find a function.

dupes is a meta configuration that allows the parameter to be duplicated in switch data. Normally, these duplicate values are not needed, and they will be deleted if they are the same as the default values after all parameters have been parsed. Some parameters require duplication to function properly, such as display altering parameters defined with linkParams().

If duplicates are not needed, this parameter should be deleted.

Predefined functions

If func is a string, then the module will attempt to use a predefined function.

Function	Use
name	Uses the parameter named "name". If "name" is blank or undefined, it will use the page name.
release	Uses the parameters named "release" and "update" and formats it as such: If both are defined: <release> ([[Update:<update>|Update]]) If only release is defined: <release> (Update unknown) If release is not defined: ? (edit)
removal	Uses the parameters named "removal" and "removalupdate" and formats it the same as release
hasContent	If the parameter is defined and not blank, it will be used. Otherwise, ? (edit) will be used.
image	Currently functions the same as hasContent
numbers	Removes commas from the parameter and attempts to cast it to a number. If it works, the number is used, otherwise ? (edit)

User-defined functions

If func is a function, then that function will be used to parse the parameter. User-defined functions allow for more robust formatting and guidelines.

As a general practice, user-defined functions should be located under the main functions in the module. It is best to document these functions so that they may be changed by other editors if necessary.

In user-defined functions, circumstances where the edit button should be shown should return nil, which is automatically handled by the module.

Simple and complex definitions

Parameters may be mapped to functions in a straightforward manner by simply definining a name of or reference to a function, such as:

	ret:defineParams{
		{ name = 'foo', func = 'hasContent' },
		{ name = 'bar', func = barFunc }
	}

Simple definitions only pass the parameter from the master list named <name>. Some parameters need more interaction with other parameters. To do this, we require a complex definition. Complex definitions point to a user-defined function and map what parameters to pass. Complex definitions can also pass literal values or the uncleaned value with the use of flags.

Complex functions are defined as table values formatted as such:

	func = { name = <funcname>, params = { <paramname>, ... }, flag = <flags> }

A basic example for complex functions is:

	ret:defineParams{
		{ name = 'foo', func = { name = fooFunc, params = { 'bar', 'baz' } },
	}
	-- ...
	-- ...
	function fooFunc(arg1,arg2)
		return arg1..arg2
	end

In this example, we have a parameter named "foo", but we use the parameters passed to the template named "bar" and "baz". Parameters are passed in the order listed, so in the above, the parameter bar is used for arg1, and baz is used for arg2.

Flags define the behaviour of the parameters named. The following flag behaviours exist:

• d - Looks for the cleaned and parsed version of the parameter. If not cleaned, it will use the value passed to the template. If neither exist, it will use nil. This is the default behaviour if no flag is defined.
• p - Looks only at the value passed to the template. If it does not exist, it will use nil.
• r or l - Uses the literal (or raw) value.

If flag is a string, then the behaviour defined by it will apply to every parameter passed. If flag is a table, then each flag will only define the behaviour of the respective parameter.

For example:

	ret:defineParams{
		{ name = 'foo', func = {
					name = fooFunc,
					params = { 'foo', 'bar', 'baz' },
					flag = { 'd', 'p', 'l' },
				},
		}

In the above snippet, foo will use the default behaviour and bar will only look for the value passed to the template. The third parameter will use the string literal 'baz'.

Definition order

Parameters are defined in the order that they are coded. If a parameter relies on the cleaned value of another parameter, then the parameter dependent on the other will need to be defined after in the definition table.

addRow

	ret:addRow(tbl)

Adds a new row to the template with columns and behaviour defined by tbl, which should be a table that holds cells defined as table variables, formatted as such:

	{
		{ celltype, label, <attr1> = <value1>, <attr2> = <value2> ... },
		...
	}

celltype and label are string values that define the fundamental display of the cell.

celltype	Output
th	Creates a <th> tag where the content is the value of label
td	Creates a <td> tag where the content is the value of label
argh	Creates a <th> tag where the content is the value of the parameter named label
argd	Creates a <td> tag where the content is the value of the parameter named label

The attributes are any of the available attributes defined inside the function. All functions that are ultimately run are documented in the Lua reference manual and are run on the tag for the specific table cell they are called on.

attr	Type	Use
attr	table	Passes the value to mw.html.attr()
css	table	Passes the value to mw.html.css()
colspan	number	Uses the value to run mw.html.attr('colspan',#)
rowspan	number	Uses the value to run mw.html.attr('rowspan',#)
title	string	Uses the value to run mw.html.attr('title',text)
class	string	Passes the value to mw.html.addClass()
class	table	Passes every value in the table to mw.html.addClass()

If the template is a switch infobox, then data-attr-param="<paramname>" will be added to the table cell.

This function will return the template, allowing further self functions to be performed.

wikitext

	ret:wikitext(txt)

Appends wikitext to the top-level wrapper. Templates, etc. passed directly from Lua code will need explicit preprocessing prior to display properly.

This function will return the template, allowing further self functions to be performed.

caption

	ret:caption()

Adds a caption to the infobox based off the subject name, using the following priority for the text:

• name parameter
• name1 parameter (if switch infobox)
• {{PAGENAME}}

If the template is a switch infobox, this will also add data-attr-param="name" to the caption.

This function will return the template, allowing further self functions to be performed.

attr

	ret:attr(arg)

Passes arg to mw.html.attr().

This function will return the template, allowing further self functions to be performed.

float

	ret:float(dir)

Changes the direction of the CSS style float for the top level wrapper. By default, all infoboxes float right.

This function will return the template, allowing further self functions to be performed.

css

	ret:css(...)

Passes the arguments to mw.html.css().

This function will return the template, allowing further self functions to be performed.

addClass

	ret:addClass(arg)

Passes arg to mw.html.addClass().

This function will return the template, allowing further self functions to be performed.

addClasses

	ret:attr(...)

Passes every argument to mw.html.addClass() individually.

This function will return the template, allowing further self functions to be performed.

tag

	ret:tag(arg)

Passes arg to mw.html.tag().

This function will return the tag (not the template), allowing further self functions to be performed.

useSMW

	ret:useSMW(tbl)

Tells the module to create properties for parameters, as well as defining those mappings with tbl, a table whose elements form an associated array formatted as such:

	{
		parameter = property,
		...
	}

When defined, properties will be defined for two separate properties: both "Property:<name>" and "Property:All <name>". If the template holds switch infobox data, then properties will be defined for "Property:<name><X>" for all applicable X. The "All <name>" properties exist to create storage for all applicable values. Keep this in mind, as "Property:<name>" will only ever store the default value.

By default, the module will define Property:Release date and Property:Is members only.

noSwitch

	ret:noSwitch()

Forces the template to use only a single version, the default.

maxVersion

	ret:maxVersion()

Returns the number of versions used by the infobox. When run the first time, this function will check and define the version count first. Subsequent calls will simply return the count.

linkParams

	ret:linkParams{
			paramName = linkedParam,
			...
	}

Links two parameters where one parameter (paramName) is the parameter name of a cell's contents, and linkedParam is the name of the parameter that contains the classes for the specified cell. It will only have an effect on switch infoboxes. Both parameters will need to be defined in the infobox with definedParams. They should be functions of the parameter they operator on and include dupes = true in their definitions.

This function must be called only after calling ret:cleanParams() (and before ret:finish()).

Example: grand exchange graphs do not make sense to display for untradeable items within switch infoboxes (e.g. ahrim's staff); one could use a linkParam to add a class that will display:none table row when switching to untradeable items.

In the source code of the infobox, these will be added as such:

<div class="infobox-switch-resources hidden">
	<span data-attr-param="param">
		<span data-attr-index="0" data-addclass="linkedParam[d]">paramName[d]</span>
		<span data-attr-index="1" data-addclass="linkedParam[1]">paramName[1]</span>
		<span data-attr-index="2" data-addclass="linkedParam[2]">paramName[2]</span>
	</span>
</div>

From this, the switch infobox javascript will add the contents of data-addclass to class attribute of the row of the table when the infobox is switched. You will also need to define the classes you are using in global CSS.

If the parameter is a th or td element, the class is added to the parent tr. Otherwise, it is added to the element directly (e.g. caption element).

finish

Finalises the template and adds remaining required HTML.

• Creates hidden tag for switch infobox data (if needed)
• Adds Category:Pages that contain switch infobox data if in the mainspace
• Defines Property:Version count if in the mainspace
• Adds Semantic MediaWiki Data in a hidden tag (if needed)

  This data can be viewed on the page itself by using inspect element, but it is not normally visible

• Adds infobox bottom links

param

	ret:param(arg, flag)

Returns the value of the parameter named arg. The exact format and values are determined by the flag:

• d or empty - default value of the parameter
• f or full - all values of the parameter as a table
• s or switches - table of all switch values (or nil if no switches are present)
• s# - switch value at index #
• r - if defined, switch value 1, otherwise the default value

Note that this function returns the actual table used by the template. If a switch value is equal to Infobox.nil_param for flag s#, then nil will be returned instead; however, when calling specific indices from the tables returned by f or r, the value of Infobox.nil_param will be returned without extra parsing.

paramDefined

	ret:paramDefined(arg, flag)

Looks to see if the parameter named arg is defined at any index, based on instructions from flag:

• 0 or empty - default value of parameter
• # - value of switch at index #
• all - true if the parameter is defined with a default or at any switch value

paramGrep

	ret:paramGrep(arg, query)

Performs a function or search on every possible value of the parameter named arg. query can be either a function, a string, or a number. If a match is found or the function query returns true, paramGrep will end its search.

If query is a function, that function must pass a single argument (the parameter), and return either true or false.

If query is a string, then that string will be compared to each value of the parameter. If they match exactly, disregarding casing, then true will be returned. To perform a pattern match on strings, you will need to define query as a function that returns a boolean value based on string.find or mw.ustring.find.

If query is a number (or any other type), then it will be compared to each value for a match.

Matches are only checked if the type of query matches the value of the parameter; e.g., it is not valid to search for a number (ex: 4) inside a string (ex: '455').

paramRead

	Infobox.paramRead(arg, query)

Performs the same function as paramGrep; however, instead of arg being a name of a parameter to look for, it is the table itself. Useful for functions where only the table of parameters is passed, but not the whole infobox.

categoryData

	ret:categoryData()

Returns fundamental category data collected during Infobox:cleanParams().

Fields in the category data include:

• one_defined - true if at least one possible value of the parameter is defined
• all_defined - false if at least one possible value of the parameter is not defined

Rules

Defined parameters

Parameters are to be considered "defined" if they meet all of the following criteria:

• Is not nil
• Contains at least one non-whitespace character (string.find(param,'%S')
• Is not equal to Infobox.nil_param
• Does not contain the string 'action=edit'

---

--
-- This module implements {{Infobox}}
--
 
local p = {}

local navbar = require('Module:Navbar')._navbar

local args = {}
local origArgs
local root

local function notempty( s ) return s and s:match( '%S' ) end

local function fixChildBoxes(sval, tt)
	if notempty(sval) then
		local marker = '<span class=special_infobox_marker>'
		local s = sval
		s = mw.ustring.gsub(s, '(<%s*[Tt][Rr])', marker .. '%1')
		s = mw.ustring.gsub(s, '(</[Tt][Rr]%s*>)', '%1' .. marker)
		if s:match(marker) then
			s = mw.ustring.gsub(s, marker .. '%s*' .. marker, '')
			s = mw.ustring.gsub(s, '([\r\n]|-[^\r\n]*[\r\n])%s*' .. marker, '%1')
			s = mw.ustring.gsub(s, marker .. '%s*([\r\n]|-)', '%1')
			s = mw.ustring.gsub(s, '(</[Cc][Aa][Pp][Tt][Ii][Oo][Nn]%s*>%s*)' .. marker, '%1')
			s = mw.ustring.gsub(s, '(<%s*[Tt][Aa][Bb][Ll][Ee][^<>]*>%s*)' .. marker, '%1')
			s = mw.ustring.gsub(s, '^(%{|[^\r\n]*[\r\n]%s*)' .. marker, '%1')
			s = mw.ustring.gsub(s, '([\r\n]%{|[^\r\n]*[\r\n]%s*)' .. marker, '%1')
			s = mw.ustring.gsub(s,  marker .. '(%s*</[Tt][Aa][Bb][Ll][Ee]%s*>)', '%1')
			s = mw.ustring.gsub(s,  marker .. '(%s*\n|%})', '%1')
		end
		if s:match(marker) then
			local subcells = mw.text.split(s, marker)
			s = ''
			for k = 1, #subcells do
				if k == 1 then
					s = s .. subcells[k] .. '</' .. tt .. '></tr>'
				elseif k == #subcells then
					local rowstyle = ' style="display:none"'
					if notempty(subcells[k]) then rowstyle = ''	end
					s = s .. '<tr' .. rowstyle ..'><' .. tt .. ' colspan=2>\n' .. subcells[k]
				elseif notempty(subcells[k]) then
					if (k % 2) == 0 then
						s = s .. subcells[k]
					else
						s = s .. '<tr><' .. tt .. ' colspan=2>\n' .. subcells[k] .. '</' .. tt .. '></tr>'
					end
				end
			end
		end
		return s
	else
		return sval
	end
end

local function union(t1, t2)
    -- Returns the union of the values of two tables, as a sequence.
    local vals = {}
    for k, v in pairs(t1) do
        vals[v] = true
    end
    for k, v in pairs(t2) do
        vals[v] = true
    end
    local ret = {}
    for k, v in pairs(vals) do
        table.insert(ret, k)
    end
    return ret
end

local function getArgNums(prefix)
    -- Returns a table containing the numbers of the arguments that exist
    -- for the specified prefix. For example, if the prefix was 'data', and
    -- 'data1', 'data2', and 'data5' exist, it would return {1, 2, 5}.
    local nums = {}
    for k, v in pairs(args) do
        local num = tostring(k):match('^' .. prefix .. '([1-9]%d*)$')
        if num then table.insert(nums, tonumber(num)) end
    end
    table.sort(nums)
    return nums
end

local function addRow(rowArgs)
    -- Adds a row to the infobox, with either a header cell
    -- or a label/data cell combination.
    if rowArgs.header then
        root
            :tag('tr')
                :addClass(rowArgs.rowclass)
                :cssText(rowArgs.rowstyle)
                :attr('id', rowArgs.rowid)
                :tag('th')
                    :attr('colspan', 2)
                    :attr('id', rowArgs.headerid)
                    :addClass(rowArgs.class)
                    :addClass(args.headerclass)
                    :css('text-align', 'center')
                    :cssText(args.headerstyle)
                    :cssText(rowArgs.rowcellstyle)
                    :wikitext(fixChildBoxes(rowArgs.header, 'th'))
    elseif rowArgs.data then
        local row = root:tag('tr')
        row:addClass(rowArgs.rowclass)
        row:cssText(rowArgs.rowstyle)
        row:attr('id', rowArgs.rowid)
        if rowArgs.label then
            row
                :tag('th')
                    :attr('scope', 'row')
                    :attr('id', rowArgs.labelid)
                    :cssText(args.labelstyle)
                    :cssText(rowArgs.rowcellstyle)
                    :wikitext(rowArgs.label)
                    :done()
        end
        
        local dataCell = row:tag('td')
        if not rowArgs.label then 
            dataCell
                :attr('colspan', 2)
                :css('text-align', 'center') 
        end
        dataCell
            :attr('id', rowArgs.dataid)
            :addClass(rowArgs.class)
            :cssText(rowArgs.datastyle)
            :cssText(rowArgs.rowcellstyle)
            :newline()
            :wikitext(fixChildBoxes(rowArgs.data, 'td'))
    end
end

local function renderTitle()
    if not args.title then return end

    root
        :tag('caption')
            :addClass(args.titleclass)
            :cssText(args.titlestyle)
            :wikitext(args.title)
end

local function renderAboveRow()
    if not args.above then return end
    
    root
        :tag('tr')
            :tag('th')
                :attr('colspan', 2)
                :addClass(args.aboveclass)
                :css('text-align', 'center')
                :css('font-size', '125%')
                :css('font-weight', 'bold')
                :cssText(args.abovestyle)
                :wikitext(fixChildBoxes(args.above,'th'))
end

local function renderBelowRow()
    if not args.below then return end
    
    root
        :tag('tr')
            :tag('td')
                :attr('colspan', '2')
                :addClass(args.belowclass)
                :css('text-align', 'center')
                :cssText(args.belowstyle)
                :newline()
                :wikitext(fixChildBoxes(args.below,'td'))
end

local function renderSubheaders()
    if args.subheader then
        args.subheader1 = args.subheader
    end
    if args.subheaderrowclass then
        args.subheaderrowclass1 = args.subheaderrowclass
    end
    local subheadernums = getArgNums('subheader')
    for k, num in ipairs(subheadernums) do
        addRow({
            data = args['subheader' .. tostring(num)],
            datastyle = args.subheaderstyle or args['subheaderstyle' .. tostring(num)],
            class = args.subheaderclass,
            rowclass = args['subheaderrowclass' .. tostring(num)]
        })
    end
end

local function renderImages()
    if args.image then
        args.image1 = args.image
    end
    if args.caption then
        args.caption1 = args.caption
    end
    local imagenums = getArgNums('image')
    for k, num in ipairs(imagenums) do
        local caption = args['caption' .. tostring(num)]
        local data = mw.html.create():wikitext(args['image' .. tostring(num)])
        if caption then
            data
                :tag('div')
                    :cssText(args.captionstyle)
                    :wikitext(caption)
        end
        addRow({
            data = tostring(data),
            datastyle = args.imagestyle,
            class = args.imageclass,
            rowclass = args['imagerowclass' .. tostring(num)]
        })
    end
end

local function renderRows()
    -- Gets the union of the header and data argument numbers,
    -- and renders them all in order using addRow.
    local rownums = union(getArgNums('header'), getArgNums('data'))
    table.sort(rownums)
    for k, num in ipairs(rownums) do
        addRow({
            header = args['header' .. tostring(num)],
            label = args['label' .. tostring(num)],
            data = args['data' .. tostring(num)],
            datastyle = args.datastyle,
            class = args['class' .. tostring(num)],
            rowclass = args['rowclass' .. tostring(num)],
            rowstyle = args['rowstyle' .. tostring(num)],
            rowcellstyle = args['rowcellstyle' .. tostring(num)],
            dataid = args['dataid' .. tostring(num)],
            labelid = args['labelid' .. tostring(num)],
            headerid = args['headerid' .. tostring(num)],
            rowid = args['rowid' .. tostring(num)]
        })
    end
end

local function renderNavBar()
    if not args.name then return end
    
    root
        :tag('tr')
            :tag('td')
                :attr('colspan', '2')
                :css('text-align', 'right')
                :wikitext(navbar{
                    args.name,
                    mini = 1,
                })
end

local function renderItalicTitle()
    local italicTitle = args['italic title'] and mw.ustring.lower(args['italic title'])
    if italicTitle == '' or italicTitle == 'force' or italicTitle == 'yes' then
        root:wikitext(mw.getCurrentFrame():expandTemplate({title = 'italic title'}))
    end
end

local function renderTrackingCategories()
    if args.decat ~= 'yes' then
        if #(getArgNums('data')) == 0 and mw.title.getCurrentTitle().namespace == 0 then
            root:wikitext('[[Category:Articles which use infobox templates with no data rows]]')
        end
        if args.child == 'yes' and args.title then
            root:wikitext('[[Category:Pages which use embedded infobox templates with the title parameter]]')
        end
    end
end

local function _infobox()
    -- Specify the overall layout of the infobox, with special settings
    -- if the infobox is used as a 'child' inside another infobox.
    if args.child ~= 'yes' then
        root = mw.html.create('table')
        
        root
            :addClass('infobox')
            :addClass(args.bodyclass)
            
            if args.subbox == 'yes' then
                root
                    :css('padding', '0')
                    :css('border', 'none')
                    :css('margin', '-3px')
                    :css('width', 'auto')
                    :css('min-width', '100%')
                    :css('font-size', '100%')
                    :css('clear', 'none')
                    :css('float', 'none')
                    :css('background-color', 'transparent')
            else
                root
                    :css('width', '22em')
            end
        root
            :cssText(args.bodystyle)
    
        renderTitle()
        renderAboveRow()
    else
        root = mw.html.create()
        
        root
            :wikitext(args.title)
    end

    renderSubheaders()
    renderImages() 
    renderRows() 
    renderBelowRow()  
    renderNavBar()
    renderItalicTitle()
    renderTrackingCategories()
    
    return tostring(root)
end

local function preprocessSingleArg(argName)
    -- If the argument exists and isn't blank, add it to the argument table.
    -- Blank arguments are treated as nil to match the behaviour of ParserFunctions.
    if origArgs[argName] and origArgs[argName] ~= '' then
        args[argName] = origArgs[argName]
    end
end

local function preprocessArgs(prefixTable, step)
    -- Assign the parameters with the given prefixes to the args table, in order, in batches
    -- of the step size specified. This is to prevent references etc. from appearing in the
    -- wrong order. The prefixTable should be an array containing tables, each of which has
    -- two possible fields, a "prefix" string and a "depend" table. The function always parses
    -- parameters containing the "prefix" string, but only parses parameters in the "depend"
    -- table if the prefix parameter is present and non-blank.
    if type(prefixTable) ~= 'table' then
        error("Non-table value detected for the prefix table", 2)
    end
    if type(step) ~= 'number' then
        error("Invalid step value detected", 2)
    end
    
    -- Get arguments without a number suffix, and check for bad input.
    for i,v in ipairs(prefixTable) do
        if type(v) ~= 'table' or type(v.prefix) ~= "string" or (v.depend and type(v.depend) ~= 'table') then
            error('Invalid input detected to preprocessArgs prefix table', 2)
        end
        preprocessSingleArg(v.prefix)
        -- Only parse the depend parameter if the prefix parameter is present and not blank.
        if args[v.prefix] and v.depend then
            for j, dependValue in ipairs(v.depend) do
                if type(dependValue) ~= 'string' then
                    error('Invalid "depend" parameter value detected in preprocessArgs')
                end
                preprocessSingleArg(dependValue)
            end
        end
    end

    -- Get arguments with number suffixes.
    local a = 1 -- Counter variable.
    local moreArgumentsExist = true
    while moreArgumentsExist == true do
        moreArgumentsExist = false
        for i = a, a + step - 1 do
            for j,v in ipairs(prefixTable) do
                local prefixArgName = v.prefix .. tostring(i)
                if origArgs[prefixArgName] then
                    moreArgumentsExist = true -- Do another loop if any arguments are found, even blank ones.
                    preprocessSingleArg(prefixArgName)
                end
                -- Process the depend table if the prefix argument is present and not blank, or
                -- we are processing "prefix1" and "prefix" is present and not blank, and
                -- if the depend table is present.
                if v.depend and (args[prefixArgName] or (i == 1 and args[v.prefix])) then
                    for j,dependValue in ipairs(v.depend) do
                        local dependArgName = dependValue .. tostring(i)
                        preprocessSingleArg(dependArgName)
                    end
                end
            end
        end
        a = a + step
    end
end
 
function p.infobox(frame)
    -- If called via #invoke, use the args passed into the invoking template.
    -- Otherwise, for testing purposes, assume args are being passed directly in.
    if frame == mw.getCurrentFrame() then
        origArgs = frame:getParent().args
    else
        origArgs = frame
    end
    
    -- Parse the data parameters in the same order that the old {{infobox}} did, so that
    -- references etc. will display in the expected places. Parameters that depend on
    -- another parameter are only processed if that parameter is present, to avoid
    -- phantom references appearing in article reference lists.
    preprocessSingleArg('child')
    preprocessSingleArg('bodyclass')
    preprocessSingleArg('subbox')
    preprocessSingleArg('bodystyle')
    preprocessSingleArg('title')
    preprocessSingleArg('titleclass')
    preprocessSingleArg('titlestyle')
    preprocessSingleArg('above')
    preprocessSingleArg('aboveclass')
    preprocessSingleArg('abovestyle')
    preprocessArgs({
        {prefix = 'subheader', depend = {'subheaderstyle', 'subheaderrowclass'}}
    }, 10)
    preprocessSingleArg('subheaderstyle')
    preprocessSingleArg('subheaderclass')
    preprocessArgs({
        {prefix = 'image', depend = {'caption', 'imagerowclass'}}
    }, 10)
    preprocessSingleArg('captionstyle')
    preprocessSingleArg('imagestyle')
    preprocessSingleArg('imageclass')
    preprocessArgs({
        {prefix = 'header'},
        {prefix = 'data', depend = {'label'}},
        {prefix = 'rowclass'},
        {prefix = 'rowstyle'},
        {prefix = 'rowcellstyle'},
        {prefix = 'class'},
        {prefix = 'dataid'},
        {prefix = 'labelid'},
        {prefix = 'headerid'},
        {prefix = 'rowid'}
    }, 50)
    preprocessSingleArg('headerclass')
    preprocessSingleArg('headerstyle')
    preprocessSingleArg('labelstyle')
    preprocessSingleArg('datastyle')
    preprocessSingleArg('below')
    preprocessSingleArg('belowclass')
    preprocessSingleArg('belowstyle')
    preprocessSingleArg('name')
    args['italic title'] = origArgs['italic title'] -- different behaviour if blank or absent
    preprocessSingleArg('decat')
 
    return _infobox()
end
 
return p