Module:Template link general/sandbox

This is the module sandbox page for Module:Template link general (diff).
See also the companion subpage for test cases.
-- This implements Template:Template link general and various other templates in its family
local getArgs = require('Module:Arguments').getArgs
local p = {}

-- Is a string non-empty?
local function _ne(s)
    return s ~= nil and s ~= ""
end

local nw = mw.text.nowiki

local function addTemplate(s)
    if not _ne(s) then return '' end
    local i, _ = s:find(':', 1, true)
    if i == nil then
        return 'Template:' .. s
    end
    local ns = s:sub(1, i - 1)
    if ns == '' or mw.site.namespaces[ns] then
        return s
    else
        return 'Template:' .. s
    end
end

local function trimTemplate(s)
    local needle = 'template:'
    if s and s:sub(1, needle:len()):lower() == needle then
        return s:sub(needle:len() + 1)
    else
        return s
    end
end

-- Builds the link part
local function linkTitle(args)
    local titleObj
    if _ne(args['1']) then
        -- This handles :Page and other NS
        titleObj = mw.title.new(args['1'], 'Template')
    else
        titleObj = mw.title.getCurrentTitle()
    end

    local textPart = args.alttext
    if not _ne(textPart) then
        if titleObj ~= nil then
            -- 10 is the Template namespace ID
            textPart = titleObj:inNamespace(10) and args['1'] or titleObj.fullText
        else
            -- redlink
            textPart = args['1'] or ''
        end
    end
    
    if _ne(args.subst) then
        -- HACK: the ns thing above is probably broken
        textPart = 'subst:' .. textPart
    end
    
    if _ne(args.brace) then
        textPart = nw('{{') .. textPart .. nw('}}')
    elseif _ne(args.braceinside) then
        textPart = nw('{') .. textPart .. nw('}')
    end

    local titlePart
    if _ne(args.nolink) then
        titlePart = textPart
    else
        titlePart = '[[' .. (titleObj ~= nil and titleObj.fullText or addTemplate(args['1'])) ..
            '|' .. textPart .. ']]'
    end
    if _ne(args.braceinside) then
        titlePart = nw('{') .. titlePart .. nw('}')
    end
    local bold = _ne(args.bold) or _ne(args.boldlink) or _ne(args.boldname)
    if bold then
        titlePart = "'''" .. titlePart .. "'''"
    end
    if _ne(args.nowrapname) then
        titlePart = '<span class="nowrap">' .. titlePart .. '</span>'
    end
    return titlePart
end

function p.main(frame)
    local args = getArgs(frame, {
        trim = true,
        removeBlanks = false
    })
    return p._main(args)
end

function p._main(args)
    local italic = _ne(args.italic) or _ne(args.italics)
    local dontBrace = _ne(args.brace) or _ne(args.braceinside)
    local code = _ne(args.code) or _ne(args.tt)
    local show_result = _ne(args._show_result)
    local expand = _ne(args._expand)
    
    local titlePart = linkTitle(args)
    
    -- Build the arguments
    local textPart = ""
    local textPartBuffer = "&#124;"
    local codeArguments = {}
    local codeArgumentsString = ""
    local i = 2
    local j = 1
    while args[i] do
        local val = args[i]
        if val ~= "" then
            if _ne(args.nowiki) then
                val = nw(mw.text.unstripNoWiki(val))
            end
            local k, v = string.match(val, "^%s*(.-)%s*=%s*(.-)%s*$")
            if not k or k == "" then
                codeArguments[j] = val
                j = j + 1
            else
                codeArguments[k] = v
            end
            codeArgumentsString = codeArgumentsString .. textPartBuffer .. val
            if italic then
                val = '<span style="font-style:italic;">' .. val .. '</span>'
            end
            textPart = textPart .. textPartBuffer .. val
        end
        i = i + 1
    end

    -- final wrap
    local ret = titlePart .. textPart
    if not dontBrace then ret = nw('{{') .. ret .. nw('}}') end
    if _ne(args.a) then ret = nw('*') .. '&nbsp;' .. ret end
    if _ne(args.kbd) then ret = '<kbd>' .. ret .. '</kbd>' end
    if code then
        ret = '<code>' .. ret .. '</code>'
    elseif _ne(args.plaincode) then
        ret = '<code style="border:none;background:transparent;color:inherit">' .. ret .. '</code>'
    end
    if _ne(args.nowrap) then ret = '<span class="nowrap">' .. ret .. '</span>' end
    
    if _ne(args.debug) then ret = ret .. '\n<pre>' .. mw.text.encode(mw.dumpObject(args)) .. '</pre>' end

    if show_result and _ne(args['1']) then
        if _ne(args.nocat) then codeArguments['nocat'] = true end
        local result = mw.getCurrentFrame():expandTemplate{title = addTemplate(args['1']), args = codeArguments}
        ret = ret .. " → " .. result
    end

    if expand and _ne(args['1']) then
        local query = mw.text.encode('{{' .. addTemplate(args['1']) .. string.gsub(codeArgumentsString, textPartBuffer, "|") .. '}}')
        local url = mw.uri.fullUrl('special:ExpandTemplates', 'wpInput=' .. query)
        ret = ret .. " [" .. tostring(url) .. "]"
    end

    return ret
end

return p
This page was redesigned at the edge.

Module:Template link general/sandbox

Basic usage
