Module:PageLinks

local ToolbarBuilder = require('Module:Toolbar')

local p = {} -- Page object
local trackingCategories = {} -- Table for storing the tracking categories.
local demo

-- Define a custom error message for this module.
local function err(msg, section)
	local help
	if section then
		help = ' ([[Template:Page-multi#' .. section .. '|help]])'
	else
		help = ''
	end
	local cat
	if demo == 'yes' then
		cat = ''
	else
		cat = '[[Category:PageLinks transclusions with errors]]'
	end
	return '<span class="error">[[Template:Page-multi|Page-multi]] error: ' .. msg 
        .. help .. '.</span>' .. cat
end

----------------------------------------------------------------------------------------------
--      To add more link types, write a function that produces an individual link, and put  --
--      it at the bottom of the list below. Then, add a link code for your function to the  --
--      "linktypes" table. Try and make the code three letters or less. 
--
--      If you want more helper strings, you can define them in the generatePageDataStrings --
--      function below.                                                                     --
----------------------------------------------------------------------------------------------

----------------------------------------------------------------------------------------------
--                                LINK FUNCTIONS START                                      --
----------------------------------------------------------------------------------------------

local function makePageLink()
	return p.fullText and '[[:' .. p.fullText .. '|' .. p.fullText .. ']]' or ''
end

local function makeTalkLink()
	return '[[' .. tostring(p.talkPageTitle) .. '|talk]]'
end

local function makeTalkOrSubjectLink()
	if p.isTalkPage then
		return '[[:' .. tostring(p.subjectPageTitle) .. '|subject]]'
	else
		return '[[' .. tostring(p.talkPageTitle) .. '|talk]]'
	end
end

local function makeWhatLinksHereLink()
	return '[[Special:WhatLinksHere/' .. p.fullText .. '|links]]'
end

local function makeRelatedChangesLink()
	return '[[Special:RelatedChanges/' .. p.fullText .. '|related]]'
end

local function makeEditLink()
	return '[[Special:EditPage/' .. p.fullText .. '|edit]]'
end

local function makeHistoryLink()
	return '[[Special:PageHistory/' .. p.fullText .. '|history]]'
end

local function makeWatchLink()
	return '[' .. p:fullUrl( 'action=watch' ) .. ' watch]'
end

local function makeTargetLogsLink()
	local url = mw.uri.fullUrl( 'Special:Log', 'page=' .. mw.uri.encode(p.fullText) )
	return '[' .. tostring(url) .. ' logs]'
end

local function makeEditFilterLogLink()
	local url = mw.uri.fullUrl( 'Special:AbuseLog', 'wpSearchTitle=' .. mw.uri.encode(p.fullText) )
	return '[' .. tostring(url) .. ' abuse&nbsp;filter&nbsp;log]'
end

local function makePageViewsLink(args)
	local endDate, startDate = "", ""
	
	if args.date then
		local date = string.gsub(args.date,"-","")
		date = os.time{year=string.sub(date,1,4), month=string.sub(date,5,6), day=string.sub(date,7,8)}
		endDate = os.date("%Y-%m-%d", date - (1*86400))
		startDate = os.date("%Y-%m-%d", date - (30*86400))
	else
		endDate = os.date("%Y-%m-%d")
		startDate = os.date("%Y-%m-%d", os.time() - (60*86400))
	end
	
	local project = string.sub(mw.site.server,3)
	local url = mw.uri.encode(p.fullText, "WIKI")
	local urlargs = '?start=' .. startDate .. '&end=' .. endDate .. '&project=' .. project .. '&pages=' .. tostring(url)
	
	if #urlargs > 255 then -- Extra chars can tip it over the max length for an IW link.
		return '[https://pageviews.toolforge.org/?' .. urlargs .. ' stats]'
	end
	return '[[:toolforge:pageviews/' .. urlargs .. '|stats]]'
end

local function makeHistory500Link()
	local url = p:fullUrl( 'action=history&limit=500' );
	return '[' .. url .. ' long history]'
end

----------------------------------------------------------------------------------------------
--                                   LINK FUNCTIONS END                                     --
--      To enable new link functions, add the code to the "linktypes" table directly below. --
----------------------------------------------------------------------------------------------

local linktypes = {
    ['t']       = makeTalkLink,
    ['ts']      = makeTalkOrSubjectLink,
    ['wlh']     = makeWhatLinksHereLink,
    ['rc']      = makeRelatedChangesLink,
    ['edit']    = makeEditLink,
    ['h']       = makeHistoryLink,
    ['w']       = makeWatchLink,
    ['tl']      = makeTargetLogsLink,
    ['efl']     = makeEditFilterLogLink,
    ['vlm-sgs'] = makePageViewsLink,
    ['pv']      = makePageViewsLink,
    ['h500']    = makeHistory500Link,
}

local function getLink(linktype, args)
	local func = linktypes[linktype]
	if func then
		return func(args)
	else
        return err('"' .. linktype .. '" is not a valid link code', 'Not a valid link code')
	end
end

local function makeToolbar(args)
    local targs = {}
    local numArgsExist = false
    for k, v in pairs(args) do
        if type(k) == 'number' and p then
            numArgsExist = true
            targs[k] = getLink(v, args)
        end
    end
    targs.style = args.small and 'font-size: 90%;'
    targs.separator = args.separator or 'dot'
    targs.class = 'lx'
    
    if numArgsExist == false then
        return nil -- Don't return a toolbar if no numeric arguments exist. -- this bit looks odd
    else
        return ToolbarBuilder.main(targs)
    end
end

local function generatePageDataStrings(args)
    -- If the page name is absent or blank, return an error and a tracking category.
    if args.page == '' or not args.page then
        return err('no page detected')
    end
    local noError
    noError, p = pcall(mw.title.new, args.page)
    if not noError then
    	return err('pcall mw.title failed')
	end
	if args.exists and (not p or p['id'] == 0) then
    	return err('page not found')
    end
end

local function generateTrackingCategories()
    if demo == 'yes' then
        return ''
    else
        return table.concat(trackingCategories)
    end
end

-- This function generates a table of all available link types, with their previews.
-- It is used in the module documentation.
local function getLinkTable(args)
    demo = args.demo -- Set the demo variable.
    -- Generate the page data strings and return any errors.
    local dataStringError = generatePageDataStrings(args)
    if dataStringError then
        return dataStringError
    end
    
    -- Build a table of all of the links.
    local result = '<table class="wikitable plainlinks sortable">'
        .. '\n<tr><th>Code</th><th>Preview</th></tr>'
    for i, value in ipairs(linktypes) do
        local code = value[1]
        result = result .. "\n<tr><td>'''" .. code .. "'''</td><td>" .. getLink(code, args) .. '</td></tr>'
    end
    result = result .. '\n</table>'
    
    return result
end

local function getSingleLink(args)
    demo = args.demo -- Set the demo variable.
    -- Generate the page data strings and return any errors.
    local dataStringError = generatePageDataStrings(args)
    if dataStringError then
        return dataStringError
    end
    
    local linktype = args[1]
    if not linktype then 
        return err('no link type specified')
    end
    local result = getLink(linktype, args)
    result = result .. generateTrackingCategories()
    return result
end

local function getLinksToolbar(args)
    demo = args.demo -- Set the demo variable.
    -- Generate the page data strings and return any errors.
    local dataStringError = generatePageDataStrings(args)
    if dataStringError then
        return dataStringError
    end    
    
    -- Build the template output.
    local result = makeToolbar(args) -- Get the toolbar contents.
    result = (result or '') .. generateTrackingCategories()
    return result
end

local function getLinks(args)
	local result = getLinksToolbar(args)

	if result then
		if args.sup then
			result = '<sup>' .. result .. '</sup>'
		end
		result = '&nbsp;' .. result
	else
		result = '' -- If there are no links specified, don't return the toolbar at all.
	end
	if args.nopage then
		result = '<span>' .. result .. '</span>'
	else
		if p then
			result = '<span>' .. makePageLink() .. result .. '</span>'
		else
			result = '<span>[[' .. args.page .. ']]' .. result .. '</span>'
		end
	end

	return result
end

local function getExampleLinks(args)
    -- This function enables example output without having to specify any
    -- parameters to #invoke.
    args.demo = 'yes'
    args.page = 'Example'
    return getLinks(args)
end

local function makeWrapper(func)
    return function (frame)
        -- If called via #invoke, use the args passed into the invoking template.
        -- Otherwise, for testing purposes, assume args are being passed directly in.
        local origArgs
        if frame == mw.getCurrentFrame() then
            origArgs = frame:getParent().args
            for k, v in pairs(frame.args) do
                origArgs = frame.args
                break
            end
        else
            origArgs = frame
        end
 
        -- Strip whitespace, and treat blank arguments as nil.
        -- 'page', and 'separator' have different behaviour depending on
        -- whether they are blank or nil, so keep them as they are.
        local args = {}
        for k, v in pairs(origArgs) do
            v = mw.text.trim(v)
            if v ~= '' or k == 'page' or k == 'separator' then
                args[k] = v
            end
        end
    
        return func(args)
    end
end

return {
    main = makeWrapper(getLinks),
    single = makeWrapper(getSingleLink),
    toolbar = makeWrapper(getLinksToolbar),
    linktable = makeWrapper(getLinkTable),
    example = makeWrapper(getExampleLinks)
}
Module:PageLinks

Tracking/maintenance category

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